WorldWideScience

Sample records for open-pit coal mines

  1. Mudstone depressurization behaviour in an open pit coal mine, Indonesia

    Energy Technology Data Exchange (ETDEWEB)

    Marchand, G.; Waterhouse, J. [Golder Associates, West Perth, WA (Australia); Crisostomo, J. [PT Adaro Indonesia, Jakarta (Indonesia)

    2010-07-01

    Mining activities in the Tutupan mine in Indonesia began in the mid-1990s. The open pit mine's coal seams are interbedded with fine-grained sandstones, mudstones, and carbonaceous mudstones. Slope stability analyses at the pit have integrated hydrogeology with geotechnical engineering analyses to optimize slope designs and reduce the risk of slope failure. This paper discussed the impact of mining and dewatering on mudstone depressurization. Sensors were placed at key points in the mine to obtain data related to the mudstone units. Reductions in pore pressure occurred as a result of groundwater flow away from the observed zones, increases in porosity, and increases in total porosity caused by an expansion of the rock mass as a result of drainage and hydrostatic unloading. Mudstone pore pressure trends with time were interpreted by determining the thickness of the mudstone unit, the presence or absence of known thin sandstone beds, unloading from overhead mining activities, and the position of the mudstone within the sedimentary sequence. The study showed that unloading activities have a significant impact on pore pressure in thick mudstone units, regardless of the depth, thickness, or properties of the unit. Pore pressure within high wall mudstone units typically decreased to values equivalent to the elevation of the unit where it was exposed to dips in a high wall. The dewatering of sandstone units in low walls caused a decline in pore pressure within the thick mudstone units located beneath the sandstones. Differences in primary permeabilities were attributed to greater fracturing in deeper and stronger rock units. 3 refs., 4 figs.

  2. Application of open-pit and underground mining technology for residual coal of end slopes

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Given the conditions of residual coal from the boundary of a flat dipping open-pit mine,which uses strip areas mining and inner dumping with slope-covering,we propose an open-pit and underground integrated mining technology for residual coal of end slopes.In the proposal a conveyance road and ventilation conveyance near the slope are built,corresponding to the pit mining area and the surface coal mine dump,as well as an interval haulage tunnel and air-inlet tunnel.The outcome shows that such mining method m...

  3. Influence of the Haizhou Open Pit Coal Mine on the atmospheric flow over Fuxin,China

    Institute of Scientific and Technical Information of China (English)

    CHEN He; YANG Zhi-feng; WANG Xuan

    2004-01-01

    The influence of the Haizhou Open Pit Mine on the atmospheric flow in nearby Fuxin City in China was analyzed with the aid of the steady-state Navier-Stokes equations. The finite element method was used to obtain numerical solutions to these equations. The results showed that the Haizhou Open Pit Coal Mine contributes to the turbulent flow in the Fuxin City and its surroundings. However, when compared with the climatic effects, the open pit mine has a relatively small impact on the atmospheric flow over Fuxin.

  4. A contribution to open pit hard coal mine waste rock management : comparing sidehill fill with layered dumping

    OpenAIRE

    Ahmad, Shakeel

    2013-01-01

    Coal mining is an important economic activity as it covers the energy demands, generates export revenues and creates employment opportunities. Mining can, however, impact the local environment. Different mining operations produce several types of waste materials and one of the major wastes produced by open-pit mines is waste rock, which is dumped at waste rock dumps. The waste rock dumps can impact the environment in several ways. For instance, in Vietnam open-pit mines have disturbed the bea...

  5. Zonal extraction technology and numerical simulation analysis in open pit coal mine

    Institute of Scientific and Technical Information of China (English)

    Chen Yanlong; Cai Qingxiang; Shang Tao; Peng Hongge; Zhou Wei; Chen Shuzhao

    2012-01-01

    In order to enhance coal recovery ratio of open pit coal mines,a new extraction method called zonal mining system for residual coal around the end-walls is presented.The mining system can improve economic benefits by exploiting haulage and ventilation roadways from the exposed position of coal seams by utilizing the existing transportation systems.Moreover,the main mining parameters have also been discussed.The outcome shows that the load on coal seam roof is about 0.307 MPa and the drop step of the coal seam roof about 20.3 m when the thickness of cover and average volume weight are about 120 m and 0.023 MN/m3 respectively.With the increase of mining height and width,the coal recovery ratio can be improved.However,when recovery ratio is more than 0.85,the average stress on the coal pillar will increase tempestuously,so the recovery ratio should also be controlled to make the coal seam roof safe.Based on the numerical simulation results,it is concluded that the ratio of coal pillar width to height should be more than 1.0 to make sure the coal pillars are steady,and there are only minor displacements on the end-walls.

  6. Stability evaluation and optimal excavated design of rock slope at Antaibao open pit coal mine, China

    Energy Technology Data Exchange (ETDEWEB)

    He, M.C.; Feng, J.L.; Sun, X.M. [China University of Mining & Technology, Beijing (China)

    2008-03-15

    Rock slope deformation stability for Antaibao open pit coal mine under mining was analyzed using finite difference technique ( FLAC3D). Optimal excavated scheme with relatively steeper slope angle of 47{sup o} instead of 30{sup o} was successfully implemented at the west wall on the geological section 73200 of the mine area, where the three-dimensional (3D) effect of nonlinear large deformation of the slope was taken into account. Physico-mechanical properties of the rock materials were obtained by laboratory tests conducted on samples cored from exploration drilling and rock blocks taken directly from the mine. A nonlinear Mohr-Coulomb material model with a tension cutoff was used in all present simulations. Nonlinear effect on excavated sequence was also discussed. It is demonstrated by dynamical response analysis that the action of earthquake magnitude VII (Richter) upon the relatively steeper excavated slope could not be more than that slope could bear.

  7. Open pit mine Drmno coal characteristics analysis for long-term thermo power plant supply regarding desulphurization device

    Energy Technology Data Exchange (ETDEWEB)

    Pavlovic, V.; Jakovljevic, I.; Stepanovic, S.

    2010-07-01

    The Drmno deposit is located in the eastern part of the Kostolac coal basin of Serbia. This paper discussed the characteristics of the open pit Drmno coal mine for long-term thermo power plant supply regarding desulphurization device. The paper provided background information on the Drmno deposit, including geologic exploration; rock type; coal layers; and a systematization of characteristics of coal. Several charts and figures were presented, including the boundary of the Drmno open pit mine on the terrain and the roof of the coal seam; a map of combustible sulphur content in the third coal seam; and exploitative quality of coal exploitation periods. It was concluded that decreasing of the emissions of sulphur oxides from the thermal power plant will be one of the highest priority tasks of EPS. 3 refs., 2 tabs., 3 figs.

  8. Research on ground water pollution by leacheate of waste dump of open pit coal mine

    Institute of Scientific and Technical Information of China (English)

    LIU Zhi-bin; YAN Hong-kun; WANG Zhao-jun

    2008-01-01

    On the basis of investigation and research on the pollution source and pollution pathway of Yujiagou area, by the ground water quality analysis and the leaching and soaking experiments of the gangue, reliable data were obtained. The experiment results prove that these inorganic salt elements are easily dissolved by the water. The main pollu-tion factors in the ground water are consisted with the main pollution factor in the leading water of the gangue. By synthetically analyzing, a conclusion is shown that the salts in the leacheate of the waste dump of open pit coal mine are the primary pollution source for groundwater of Yujiagou area. An assessment is made about the degree of pollution of the ground water in the study area.

  9. Contributions to the workshop `Residual ponds from open pit brown coal mining`; Beitraege zum Workshop ``Braunkohlebergbaurestseen``

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-12-31

    The contributions to the workshop ``Investigations on flooding in residual ponds from open-pit mining`` deal, inter alia, with the hydrochemical development of flushing waters, the stability of the water quality of residual lakes, especially under the impact of land contamination, the influence of brine receipts by flushed residual lakes, and with the microbiological ecology of residual lakes from mining. Furthermore, geophysical studies for demonstrating paths of flow and for calculating the depth and volume of residual lakes from open-pit mining are discussed. (MSK) [Deutsch] Die Beitraege zu dem Workshop `Untersuchungen zu Flutungen in Tagebaurestseen` befassen sich unter anderem mit der hydrochemischen Entwicklung von Flutungsgewaessern, mit der Qualitaetsstabilitaet von Restseewaessern - insbesonders bei Einwirkung von Altlasten - und mit den Einfluessen von Solezufluessen bei Restseeflutung sowie mit Untersuchungen zur mikrobiologischen Oekologie in Bergbaurestseen. Desweiteren werden geophysikalische Untersuchungen zum Nachweis von Fliesswegen und die Tiefen- und Volumenberechnung eines Tagebaurestlochsees erlaeutert. (MSK)

  10. Novel approach for extinguishing large-scale coal fires using gas-liquid foams in open pit mines.

    Science.gov (United States)

    Lu, Xinxiao; Wang, Deming; Qin, Botao; Tian, Fuchao; Shi, Guangyi; Dong, Shuaijun

    2015-12-01

    Coal fires are a serious threat to the workers' security and safe production in open pit mines. The coal fire source is hidden and innumerable, and the large-area cavity is prevalent in the coal seam after the coal burned, causing the conventional extinguishment technology difficult to work. Foams are considered as an efficient means of fire extinguishment in these large-scale workplaces. A noble foam preparation method is introduced, and an original design of cavitation jet device is proposed to add foaming agent stably. The jet cavitation occurs when the water flow rate and pressure ratio reach specified values. Through self-building foaming system, the high performance foams are produced and then infused into the blast drilling holes at a large flow. Without complicated operation, this system is found to be very suitable for extinguishing large-scale coal fires. Field application shows that foam generation adopting the proposed key technology makes a good fire extinguishment effect. The temperature reduction using foams is 6-7 times higher than water, and CO concentration is reduced from 9.43 to 0.092‰ in the drilling hole. The coal fires are controlled successfully in open pit mines, ensuring the normal production as well as the security of personnel and equipment. PMID:26370817

  11. Open Pit Water Control Safety A Case Of Nchanga Open Pit Mine Zambia

    OpenAIRE

    Silwamba C; Chileshe P R K

    2015-01-01

    Abstract Mining in Chingola Zambia started underground in 1931 and was catastrophically flooded and closed. The present Nchanga Underground Mine NUG started in 1937. The Nchanga Open Pit NOP mine started in 1955 situated to the west of NUG and partially overlying it. Open pit water control safety operations in the Nchanga-Chingola area have successfully enabled the safe extraction of millions of tonnes of copper ore annually over the past 60 years from NUG mining as well as the NOP. At the st...

  12. Soil water deficit and vegetation restoration in the refuse dumps of the Heidaigou open-pit coal mine, Inner Mongolia, China

    Institute of Scientific and Technical Information of China (English)

    Lei Huang; Peng Zhang; YiGang Hu; Yang Zhao

    2016-01-01

    The sustainability of ecosystem restoration of refuse dumps in open-pit coal mines depends on plant species selection, their configuration, and the optimal usage of water resources. This study is based on field experiments in the northern refuse dump of the Heidaigou open-pit coal mine in Inner Mongolia of China established in 1995. Eight plant configurations, including trees, shrubs, grasses, and their combinations, as well as the adjacent community of natural vegetation, were selected. The succession of the revegetated plants, soil water storage, the spatiotemporal distribution of plant water deficits degree and its compensation degree were also studied. Results indicated that the vegetation cover (shrubs and herbaceous cover), richness, abundance, soil nutrients (soil organic matter, N and P), and biological soil crust coverage on the soil surface are significantly influenced by the vegetation configurations. The average soil water storage values in the shrub + grass and grass communities throughout the growing season are 208.69 mm and 206.55 mm, which are the closest to that of in the natural vegetation community (215.87 mm). Plant water deficits degree in the grass and shrub + grass communities were the lowest, but the degrees of water deficit compensation in these configuration were larger than those of the other vegetation configurations. Differences in plant water deficit degree and water compensation among the different config-urations were significant (P <0.05). Plant water deficit degrees were predominantly minimal on the surface, increased with increasing soil depth, and remained stable at 80 cm soil depth. The soil moisture compensation in the natural vegetation, shrub + grass, and grass communities changed at 10%, while that in other vegetation communities changed between 20% and 40%. Overall, we conclude that the shrub + grass and grass configuration modes are the optimal vegetation restoration models in terms of ecohydrology for future ecological

  13. Open Pit Water Control Safety A Case Of Nchanga Open Pit Mine Zambia

    Directory of Open Access Journals (Sweden)

    Silwamba C

    2015-08-01

    Full Text Available Abstract Mining in Chingola Zambia started underground in 1931 and was catastrophically flooded and closed. The present Nchanga Underground Mine NUG started in 1937. The Nchanga Open Pit NOP mine started in 1955 situated to the west of NUG and partially overlying it. Open pit water control safety operations in the Nchanga-Chingola area have successfully enabled the safe extraction of millions of tonnes of copper ore annually over the past 60 years from NUG mining as well as the NOP. At the start Nchanga mining license surface already had NUG and many watershed divides with the Nchanga and Chingola streams being the main streams feeding into Zambias second largest river Kafue river and 42 of the year was characterised by heavy rains ranging between 800mm to 1300mm per annum. In this paper the presence of very significant amounts of seasonal rain and subsurface water in the mining area was identified as both a curse and a blessing. An excess in seasonal rain and subsurface water would disrupt both open pit and underground mining operations. In order for NOP to be operated successfully stable and free from flooding coping water management tactics were adopted from 1955 to 2015 including 1. Underground mine pump chamber pumping system 2. Piezometer instrumented boreholes 3. Underground mine 1500-ft sub-haulage east borehole dewatering beneath the open pit 4. Nchanga and Chingola stream diversionary tunnel and open drains 5. Nchanga stream causeway and embankment dam in the Matero School Golf Club area 6. Pit perimeter borehole pumping 7. Outer and inner pit perimeter drains and bund walls 8. In-pit ramp side drains 9. In-pit sub-horizontal borehole geo-drains and water and 10. Pit bottom sump pumps. Application of grout curtains along the Vistula River Poland was noted as a possibility in the right circumstances although it had never been used at Nchanga Open Pit. An additional conclusion was that forward health safety and environmental end

  14. Mineralogy and characterization of deposited particles of the aero sediments collected in the vicinity of power plants and the open pit coal mine: Kolubara (Serbia).

    Science.gov (United States)

    Cvetković, Željko; Logar, Mihovil; Rosić, Aleksandra

    2013-05-01

    In this paper, particular attention was paid to the presence of aerosol solid particles, which occurred mainly as a result of exploitation and coal combustion in the thermal power plants of the Kolubara basin. Not all of the particles created by this type of anthropogenic pollution have an equal impact on human health, but it largely depends on their size and shape. The mineralogical composition and particle size distribution in the samples of aero sediments were defined. The samples were collected close to the power plant and open pit coal mine, in the winter and summer period during the year 2007. The sampling was performed by using precipitators placed in eight locations within the territory of the Lazarevac municipality. In order to characterize the sedimentary particles, several methods were applied: microscopy, SEM-EDX and X-ray powder diffraction. The concentration of aero sediments was also determined during the test period. Variety in the mineralogical composition and particle size depends on the position of the measuring sites, geology of the locations, the annual period of collecting as well as possible interactions. By applying the mentioned methods, the presence of inhalational and respiratory particles variously distributed in the winter and in the summer period was established. The most common minerals are quartz and feldspar. The presence of gypsum, clay minerals, calcite and dolomite as secondary minerals was determined, as well as the participation of organic and inorganic amorphic matter. The presence of quartz as a toxic mineral has a particular impact on human health.

  15. Black Butte switches to laser for mapping open pit mines

    Energy Technology Data Exchange (ETDEWEB)

    Corbley, K.P. [Corbley Communications Inc., Littleton, CO (USA)

    2001-03-01

    The Black Butte Coal Co. has turned to a new laser-based mapping technology called Light Detection and Ranging, LIDAR, for mapping the topography of surface mines. The system, known as the Remote Airborne Mapping System (RAMS), is provided by EnerQuest Systems LLC of Denver. In four projects at the 63-square mile Black Butte operation, advanced airborne LIDAR has demonstrated advantage over aerial photography in terms of timeliness and convenience for mapping coal seams in an open-pit mine. LIDAR uses a scanning laser altimeter to directly measure the latitude, longitude and elevation coordinates of ground points by emitting light pulses towards the ground from the unit in the aircraft. Black Butte mine uses a dragline for overburden stripping. 3-D models of the pit and seams are created with Minescape software. The LIDAR system allows modeling of overburden to determine the position of the economic cutoff by mapping outside the pit: mapping inside the pit enables the 3-D model to be checked. 1 fig., 1 photo.

  16. Superficial drainage studies in open-pit mines

    International Nuclear Information System (INIS)

    Drainage studies concerning large open-pit mining projects can be of vital importance throughout the mining activity itself as they may assist in avoiding activity interruptions due to drainage problems, therefore representing substantial savings. These studies should, in fact, be carried out from the initial activity stages and shall be considered in operational, project and planning decisions in order to optimize results and reduce costs. This specific study presents a drainage study systematization proposal, enphasazing economic decision criteria. The authors comment on studies of this nature developed at the Caldas uranium mine - NUCLEBRAS. (D.J.M.)

  17. Cut slope reinforcement technique in open-pit mines

    Institute of Scientific and Technical Information of China (English)

    Yongtao Gao; Jianbo Sun; Shunchuan Wu; Aibing Jin

    2004-01-01

    The design and practice in supporting the cut slope of an open-pit mine were introduced, in which the high pressure grouting method was used in reinforcing the weak formation in the slopes. Based on a detailed geological survey of the slope, a theoretical analysis was carried out, and the design parameters were proposed, where the Tresca or Mohr-Coulomb yield criteria was employed. A patent technology, named "Technology of high pressure and multiple grouting in different levels within a single hole", was employed in the construction. Anchor bars were also installed as grouting proceeds. This method combines anchoring and grouting comprehensively and was found successful in practice.

  18. 露天煤矿开采现状及生态环境影响分析%Impact analysis on mining status and ecological environment in open-pit coal mine

    Institute of Scientific and Technical Information of China (English)

    宋子岭; 范军富; 王来贵; 魏春启; 王建国; 纪玉石

    2016-01-01

    The article analyzes the mining scale, regional distribution characteristics and the effect of open-pit mining on the mining area ecological environment, presents the integration technology of open-pit mining and ecological environment, and builds green mining theory system. The mine introduces "green factor" to establish the objective function of open-pit mining, in order to achieve ecological environment protection.%分析我国露天煤矿开采规模、地区分布特点,煤炭露天开采对矿区生态环境影响,提出了露天开采与生态环境一体化技术。建立露天矿绿色开采理论体系,引入“绿色因子”建立露天开采目标函数,以达到强制实现生态环境保护的目标。

  19. Predictive Index for slope instabilities in open pit mining

    CERN Document Server

    Ortega, J H; Lecaros, R; Medel, F; Padilla, F; García, A

    2016-01-01

    In this paper we study the stability and deformation of structures, in particular the wall of an open pit mine is studied by using information obtained from a variety of remote sensors and some extra data, with a novelty approach considering the use of mathematical models and data mining techniques. In particular we present two models to help the study the slope stability of pit and the possible occurrence of movements. Primarily we present an static model for slow movements, which will help us identify areas of possible risks areas with time horizons of several months or years, depends on the available information, before the wall start moving, and secondly a dynamic short-term model, which help us to determine risks of collapse zones with several days in advance. We remark that this methodology can be a powerful tool to plain future actions in order to simulate possible scenarios considering the production plans.

  20. Radon release and dispersion from an open pit uranium mine

    Energy Technology Data Exchange (ETDEWEB)

    Kisieleski, W.E.

    1980-06-01

    Radon-222 flux from representative sections of the United Nuclear St. Anthony open-pit mine complex was measured. The collected radon was adsorbed on activated charcoal and the radon activity was measured by gamma spectroscopy. System design, calibration, and the procedure to determine radon flux density (pCi/m/sup 2/.s) are described. A continuous series of radon flux densities were measured over a 5-month period at a control point in the mine. The average flux density at the control point was 1.9 pCi/m/sup 2/.s. A close correlation between radon flux density variations and changes in barometric pressure was observed by a comparison of meteorological data and average daily radon flux density measured at the control point. The release rate from each section of the mine was calculated from the average radon flux density and the area of the section, as determined from enlarged aerial photographs. The average radon flux density for eight locations over the ore-bearing section was 7.3 pCi/m/sup 2/.s. The average flux density for four locations over undisturbed topsoil was 0.17 pCi/m/sup 2/.s. The average Ra-226 content of ten samples taken from the ore-bearing region was 102 pCi/g ore. The ratio of radon flux density to radium content (specific flux) was 0.072. The release rate from the entire St. Anthony open pit was determined to be 3.5 x 10/sup 5/ pCi/s. This rate is comparable to the natural release of radon from one square mile of undisturbed topsoil. 16 refs., 31 figs., 11 tabs.

  1. Optimization of transport passage with dragline system in thick overburden open pit mine

    Institute of Scientific and Technical Information of China (English)

    Zhang Weishi; Cai Qingxiang; Chen Shuzhao

    2013-01-01

    According to the characteristics of opencast coal resources and dragline technology system application in China, the structure and shifting step of transport passage are optimized in this paper. Typical coal trans-port passage is analyzed in aspects such as the internal dump occupation, dragline operation efficiency, coal transport distance, upper stripping distance and shifting quantities. The middle passage should be given priority in thick overburden open pit mine because the dragline system is only responsible for part stripping task. According to characteristics of middle passage, the transport passage is divided into par-allel climbing, vertical climbing and horizontal transport. In addition, the transport passage structure optimization model and shifting distance optimization model are established in this paper. The case study in Heidaigou open pit mine shows that, the parallel climbing height is accounted for about 60%of the total height, and reasonable shifting distances of the first mining area and the second mining area are 240 and 320 m. Sensitivity analysis shows that, the total passage height has important influence on the shifting step, so it is with the stripping height and passage construction cost to the passage structure.

  2. Research on dump construction and development of vertical mining to horizontal mining in inclined coal seam open-pit mine%倾斜煤层露天矿纵采转横采排土场建设发展研究

    Institute of Scientific and Technical Information of China (English)

    付恩三; 白润才; 刘光伟

    2016-01-01

    Under the conditions of vertical mining to horizontal mining in inclined coal seam open-pit mine, with the change of mining program, it leads to the changes of inner and outer dump program, stripping transportation distance, lifting height, the area of land and material goods flow. To solve this problem, the mine builds the economic model of dump construction development. From the inner and outer row of open-pit mine planning stream, outer dump transportation, land acquisition, inner dump dynamic development and the inner and outer rows peeling lifting height and other factors, the mine optimizes the inside and outside dump construction development program in the lifecycle. The article combines the process of vertical mining to horizontal mining to carry out research in Zhundong Open-pit Mine first mining area .%针对倾斜煤层露天矿纵采转横采条件下,随着开采程序的改变,导致内、外排土程序、剥离运距、提升高度、年征地面积及货料流发生变化。针对这一问题,建立排土场建设发展的经济模型,从露天矿山内外排货料流规划,外排土场运输、征地,内排土场动态发展形态及内外排剥离物提升高度等因素出发,优化露天矿生命周期内内外排土场建设发展程序。结合新疆准东露天煤矿首采区由纵采转横采的过程中,进行实例研究。

  3. Research on surveying technology applied for DTM modelling and volume computation in open pit mines

    Directory of Open Access Journals (Sweden)

    Jaroslaw Wajs

    2016-01-01

    Full Text Available The spatial information systems of mining company can be used for monitoring of mining activity, excavation planning, calculations of the ore volume and decision making. Nowadays, data base has to be updated by sources such as surveying positioning technologies and remote sensed photogrammetry data. The presented paper contains review of the methodology for the digital terrain model, i.e. DTM, modelling and obtaining data from surveying technologies in an open pit mine or quarry. This paper reviews the application of GPS, total station measurements, and ground photogrammetry for the volume accuracy assessment of a selected object. The testing field was situated in Belchatow lignite open pit mine. A suitable object had been selected. The testing layer of coal seam was located at 8’th pit sidewall excavation area. The data were acquired two times within one month period and it was connected with monthly DTM actualization of excavation. This paper presents the technological process and the results of the research of using digital photogrammetry for opencast mining purposes in the scope of numerical volume computation and monitoring the mines by comparison of different sources. The results shows that the presented workflow allow to build DTM manually and remote sensed and the accuracy assessment was presented by the volume computation pathway. Major advantages of the techniques are presented illustrating how a terrestrial photogrammetry techniques provide rapid spatial measurements of breaklines 3D data utilized to volume calculation.

  4. Blasting Design of 1185 m Level Bench of Heidaigou Open-pit Coal Mine%黑岱沟露天煤矿1185水平台阶爆破设计实践

    Institute of Scientific and Technical Information of China (English)

    孟海东; 李家; 宫玉成

    2013-01-01

    根据黑岱沟煤矿的具体条件和爆破要求对1185水平台阶进行爆破优化设计,合理选取适合主采场目前实际情况的爆破方法.根据煤层上部覆盖岩层的特点,选择高台阶抛掷爆破配合拉斗铲倒堆工艺的方式进行剥离的开采方法.根据爆破要求对选用的爆破参数:孔径、孔深、超深、底盘抵抗线、孔距、排距、填塞长度、炸药单耗、单孔装药量进行详细的计算优化,确定最后的爆破方案.使用该爆破方案后,大大降低了矿山生产成本.%To guarantee production safety and to improve the economic benefit of Heidaigou open-pit coal mine,the blasting design of level 1185 was optimized according to the specific condition and blasting requirement,and suitable blasting method was applied in main stope.According to the characteristics of covering rock on the coal seam,the high bench cast blasting method with pouring pile by using shovel was chosen.When the related blasting parameters were calculated and optimized,the final blasting scheme was determined,by which the coat of mine production was reduced greatly.

  5. 黑岱沟大型露天煤矿生态系统稳定性研究%The ecosystem stability study of large open-pit coal mine of Hei-Dai-Gou

    Institute of Scientific and Technical Information of China (English)

    赵欣; 张树礼

    2013-01-01

    黑岱沟露天煤矿已经开采20多年,该矿区的排土场进行了生态修复,使得该地区景观生态发生了显著地变化。通过生态修复工程的实施,排土场生态修复已见成效,对于是否能使该地区生态系统在修复后保持长期稳定,进行了如下研究。本文运用Miami模型,通过计算该地区植被净第一性生产力,对生态系统稳定性研究,得出如下结论:黑带沟露天煤矿所在地区的自然系统本底的生产力处于最低--较低水平,稳定性较差;复垦后稳定性大幅度提升,即生态系统更稳定。%Hei-Dai-Gou open-pit coal mine has been mined for more than 20 years, there has carried out ecological restoration , this make landscape ecology of Hei -Dai-Gou has changed significantly .Through the implementation of ecological restoration engineering , mine ecological restoration has been paid off .But whether can make the region ecosystem keep long -term stability after repair , start the re-search as follows .In this paper , using the Miami model , calculate the area of vegetation net primary productivity researching the ecological system stability.The following conclusions:The productivity of natural systems background lowest -low, stability is poorer.After reclama-tion the stability enhance significantly .the ecological system is more stable .

  6. Calculation of slope-cover height under price fluctuation in open-pit mines

    Institute of Scientific and Technical Information of China (English)

    Ma Jinyan; Cai Qingxiang; Liu Fuming; Chen Shuzhao

    2014-01-01

    Leaving ditches between adjacent mining areas can effectively reduce re-stripping in the latter mining area and simultaneously lead to an increment in internal dumping costs in the former mining area. This paper establishes calculation models for these two marginal costs. The optimizing model for slope cover height can be determined by including marginal cost models in the objective function. The paper has two main contributions:(a) it fully considers redistribution of dumping space in the model;(b) it introduces price fluctuations and cash discounts in the model. We use the typical open-pit mine as an example to test and prove the model. We conclude that a completely covered slope is reasonable in Haerwusu open pit mine;in addition to an increasing price index, the slope cover height can be reduced;and that price changes are one of the most important influencing factors of slope cover height optimization in an open-pit mine.

  7. Production Scheduling of Open Pit Mines Using Particle Swarm Optimization Algorithm

    Directory of Open Access Journals (Sweden)

    Asif Khan

    2014-01-01

    Full Text Available Determining an optimum long term production schedule is an important part of the planning process of any open pit mine; however, the associated optimization problem is demanding and hard to deal with, as it involves large datasets and multiple hard and soft constraints which makes it a large combinatorial optimization problem. In this paper a procedure has been proposed to apply a relatively new and computationally less expensive metaheuristic technique known as particle swarm optimization (PSO algorithm to this computationally challenging problem of the open pit mines. The performance of different variants of the PSO algorithm has been studied and the results are presented.

  8. Occupational Exposure to Dust in Open Pit Mining. A Short Review.

    OpenAIRE

    Maria Matos; João Santos Baptista; Miguel Tato Diogo

    2012-01-01

    A literature review concerning the scientific knowledge of all the key factors related to respirable crystalline silica dust exposure was conducted and a chronological evolution of the state-of-the-art knowledge that can respond to questions raised by the development of the work done in quarries and opencast mines is presented, based on bibliographic research. Findings assert that exposure to silica dust is the most frequent and dangerous hazard in open pit mining. Some aspects meet consensus...

  9. Coding total information on mineral raw materials using the example of the Dobro Selo open pit of the Kosovo coal basin, Yugoslavia

    Energy Technology Data Exchange (ETDEWEB)

    Trajkovic, D.

    1982-01-01

    Principles are given of coding total information for the needs of developments of mineral deposits by the open pit method. They are based on the techniques of the open pit mining department of the Mining Faculty in Belgrade. From the standpoint of open pit mines there are two main code groups: the first, in which information is coded on the mineral raw material to be mined with identification of the horizon (level) and the environment in which equipment will operate; and the second, where catalog and current information on the basic equipment is coded in the production and stripping process. In the example examined the first basic group of codes, which carries the general information and is divided into 2 code subgroups: the first, where complete identification of the coal from the Dobro Selo open pit mine is done; and the second, for the level of the bench and the environment in which the basic and auxiliary equipment will operate in the production process (using an example of the western part of this open pit, in the northern part of the Kosovo basin). The proposed system for coding total information consists of transferring information to an input medium for the information system. The basic input data; i.e., information on the structural-geological characteristics of the field, are: identification of the borehole (borehole code); coordinates and levels of the boreholes; relative depth of each test interval with corresponding lithology and stratigraphy codes; and information on chemical analyses performed and on the surface. The proposed coding system is distinguished by its simple recording and utilization of the proposed volume of information. It enables efficient analysis of the open pit's operation.

  10. Prediction of blast boulders in open pit mines via multiple regression and artificial neural networks

    Institute of Scientific and Technical Information of China (English)

    Ghiasi Majid; Askarnejad Nematollah; Dindarloo Saeid R.; Shamsoddini Hamed

    2016-01-01

    The most important objective of blasting in open pit mines is rock fragmentation. Prediction of produced boulders (oversized crushed rocks) is a key parameter in designing blast patterns. In this study, the amount of boulder produced in blasting operations of Golegohar iron ore open pit mine, Iran was pre-dicted via multiple regression method and artificial neural networks. Results of 33 blasts in the mine were collected for modeling. Input variables were: joints spacing, density and uniaxial compressive strength of the intact rock, burden, spacing, stemming, bench height to burden ratio, and specific charge. The dependent variable was ratio of boulder volume to pattern volume. Both techniques were successful in predicting the ratio. In this study, the multiple regression method was superior with coefficient of determination and root mean squared error values of 0.89 and 0.19, respectively.

  11. An imperialist competitive algorithm for solving the production scheduling problem in open pit mine

    Directory of Open Access Journals (Sweden)

    Mojtaba Mokhtarian Asl

    2016-06-01

    Full Text Available Production scheduling (planning of an open-pit mine is the procedure during which the rock blocks are assigned to different production periods in a way that the highest net present value of the project achieved subject to operational constraints. The paper introduces a new and computationally less expensive meta-heuristic technique known as imperialist competitive algorithm (ICA for long-term production planning of open pit mines. The proposed algorithm modifies the original rules of the assimilation process. The ICA performance for different levels of the control factors has been studied and the results are presented. The result showed that ICA could be efficiently applied on mine production planning problem.

  12. Charging for the waste dumping of open-pit metal mines

    Institute of Scientific and Technical Information of China (English)

    Yunbing Hou; Zhaoxiang Zhang; Haifeng Duan; Liming Xue

    2006-01-01

    Based on the externality theory and the environmental value theory, the hypothesis of charging for waste dumping of open-pit metal mines was put forth. The charging methods were designed according to the characteristics of waste dumping of openpit metal mines, including charging based on the dumping amount of the total waste, multi-charging factors, exceeding standard punishment charging, and so on. The main charging parameter is based on the dumping area rather than the total amount of waste dumping.The charging model of waste dumping of open-pit mines was formulated, and the charging rate was divided into two parts, i.e., the standard charging rate and the differential charging rate. The standard charging rate was derived using the equilibrium dynamic model,whereas the differential one was obtained by establishing the fuzzy synthesized evaluation model.

  13. Easy profit maximization method for open-pit mining

    Institute of Scientific and Technical Information of China (English)

    C.Dinis da Gama

    2013-01-01

    A methodology applicable at any phase of a surface mining project for evaluating its current technical and economic feasibility is presented. It requires the typically available quantitative data on the ore-body, with its three-dimensional block model developed upon accurate interpolations. Thus it allows estimations of exploitable reserves in func-tion of various cut-off grades, such as the average grade of mineable ore, the tonnages of ore and waste rock, stripping ratios and profit estimates for different production levels. If cost evaluations of essential mine operations are available (such as ore mining, waste removal, ore concentration, transportation, indirect project costs and expected concentrate selling prices), the method-ology will provide clear indications on the economic feasibility of mining, including the best available options at any moment. Simple expressions are developed on the basis of a profit mathematical function and an application example is presented with data available from an existing iron ore deposit.

  14. Sensitivity analysis for parameters of a monitoring system for steep slopes of open-pit mines

    Energy Technology Data Exchange (ETDEWEB)

    Xue Han; Man-chao He; Bin Zhang [Heilongjiang Institute of Science and Technology, Harbin (China). College of Architecture and Civil Engineering

    2009-07-15

    Monitoring the stability of steep slopes of open-pit mines is a major issue relating to production safety in mines. In order to determine the technical parameters of a new type of supervising system applied in monitoring steep slopes of open-pit mines, the MSARMA method was used to establish analytical models for the monitoring system, given various parameter settings based on the description of mechanical monitoring principles. We used this sensitivity analysis to conclude that the setting of the most sensitive location of a mechanical monitoring system should be within a range of 1/5-1/2 of the lower part in a vertical direction of steep slopes, with a rational and feasible range of the dip angle setting between 0-20{sup o}. Given the analytical results of our on-site experiments, we have shown that the parameters determined reflect the stability of steep slopes accurately and effectively. These conclusions provide a basis for the application of a new type of steep slope stability monitoring technology in open-pit mines. 13 refs., 8 figs.

  15. Mission-Critical Mobile Broadband Communications in Open Pit Mines

    DEFF Research Database (Denmark)

    Uzeda Garcia, Luis Guilherme; Portela Lopes de Almeida, Erika; Barbosa, Viviane S. B.;

    2016-01-01

    The need for continuous safety improvements and increased operational efficiency is driving the mining industry through a transition towards automated operations. From a communications perspective, this transition introduces a new set of high-bandwidth business- and mission-critical applications....... By means of an illustrative example the potential benefits of this framework are evaluated....

  16. Optimization model of truck flow at open-pit mines and standards for feasibility test

    Institute of Scientific and Technical Information of China (English)

    Ying Zhang; Yong Zhao; Qiwei Lu; Wenli Xu

    2004-01-01

    In order to increase production efficiency at open-pit mines, on the basis of linear programming, a practical mathematical model for optimizing truck flow was developed, which improved the traditional fixed manual schedule method. The model has advantages from linear programming and objective programming, makes most handling points working at full capacity and keeps an optimized ratio between trucks and excavators. For ensuring feasibility of the model in practical production, four standards for feasibility test were proposed. The model satisfied all the standards. The application in a large scale open-pit iron mine indicated that the model reduced the number of required trucks by 10% compared with the fixed manual schedule method.

  17. Accuracy of single count methods of WL determination for open-pit uranium mines

    International Nuclear Information System (INIS)

    A study of single count methods of WL determination was made using a database respresentative of Australian open pit uranium mine conditions. The aim of the study was to check the existence of the optimum time delay coresponding to the Rolle method, to determine the accuracy of the conversion factor for Australian conditions and to examine any systematic use of data bases of representative radon daughter concentration

  18. A statistical study of equipment operating time in an open pit lignite mine

    Energy Technology Data Exchange (ETDEWEB)

    Xerokostas, D.; Polyzos, P.; Galitis, N.; Michiotis, A.; Dalakas, G. (National Technical University, Athens (Greece). Dept. of Mechanical Engineering)

    1991-08-01

    The production planning of an open pit lignite mine, as of any mining operation in general, is influenced by a series of factors. Of great importance among these factors is the operating time of the equipment used in the production process. In this paper the authors use applied statistical methods (specially comparison tests) to study the net operating time of some excavation branches of the Ptolemais lignite mining district in Greece. Thus, it is hoped that the paper will contribute to estimating and predicting equipment performance in a more accurate way. 4 refs., 4 figs., 3 tabs.

  19. Stability assessment and feature analysis of slope in Nanfen Open Pit Iron Mine

    Institute of Scientific and Technical Information of China (English)

    Yang Jun; Tao Zhigang; Li Baoliang; Gui Yang; Li Haifeng

    2012-01-01

    Under the combined influences of special topography and the long term mining in Nanfen Open Pit Iron Mine,many large scale landslide masses appeared in heading side of stope,and tens of millions of iron mine is buried underside,making great economic losses.In order to guide the safety mining and increase the supply quantity,this paper through the use of MSARMA-method and the "MSARMA evaluation and analytical system for slope stability analysis" based on this method,which aimed at the quantitative evaluating of the slope stability before and after the actual mining below the slip mass,and the sensitivity analysis for the main influencing factor,providing scientific proof for the parameter optimization of open mine surface slope,the security and sustainable exploitation.

  20. A cost comparison study of open pit mining vs. in situ assisted gravity drainage

    International Nuclear Information System (INIS)

    The twin-well steam assisted gravity drainage (SAGD) process has resulted in breakthrough technology to access previously uneconomical deep-seated oil sands reserves in Alberta, and to provide a very cost-effective and environmentally acceptable method for extracting bitumen from reserves having a minimum of 30 m overburden. In the evaluation of new or improved bitumen recovery technologies for its new North Mine, Syncrude Canada has recognized that SAGD was a potential alternate to the current open pit mining and hot water extraction process. A study was conducted to compare and evaluate bitumen recovery by the two schemes at the North Mine site, scheduled to begin operations in 1996, for the reserves under Syncrude's tailings pond, and at a new grassroots area. Study description and analysis of results are presented for the grassroots case. The assumptions and mining/recovery processes used for the mining or SAGD method are detailed and the advantages and drawbacks of each scheme are noted. Results show that the SAGD unit supply costs are projected to be proportionately lower than the corresponding open pit mining/hot water extraction (OP/X) cost, using a 20-y project life. A sensitivity analysis indicates that the SAGD process is more sensitive to natural gas costs, while the OP/X scheme is more sensitive to power costs. The SAGD process is much less labor-intensive than OP/X and has obvious advantages in terms of tailings disposal and post-mining reclamation. In addition, the underground nature of SAGD operation eliminates adverse effects of the weather on working conditions. 11 figs

  1. Long term monitoring of water basin of an abandoned copper open pit mine

    Science.gov (United States)

    Nikolov, H.; Borisova, D.

    2012-04-01

    Nonoperating open pit mines, very often as a matter of fact abandoned, create serious ecological risk for the region of their location especially for the quality of the water since the rainfall fills the bottom of the pit forming water body having different depth. This water as a rule has very high concentration of the metals in it and is highly toxic. One example for such opencast, idle copper mine is Medet located in the central part of Bulgaria who was started for exploitation in 1964 and at that moment being the largest in Europe for production of copper concentrate. In the vicinity of it after autumn and spring rains there are many cases reported for water contamination by heavy metals such as arsenic, copper, cadmium in the rivers running close to this open pit mine. This justifies the need for long term and sustainable monitoring of the area of the water basin of this idle mine in order to estimate its acid drainage and imaging spectroscopy combined with is-situ investigations is proved to provide reliable results about the area of the water table. In the course of this study we have investigated historical data gathered by remote sensing which allowed us to make conclusions about the year behavior of this area. Our expectations are that the results of this research will help in the rehabilitation process of this idle mine and will provide the local authorities engaged in water quality monitoring with a tool to estimate the possible damage caused to the local rivers and springs. With this research we also would like to contribute to the fulfillment of the following EU Directives: Directive 2006/21/°C on the Management of Waste from the Extractive Industries and Directive 2004/35/ °C on Environmental Liability with regard to the Prevention and Remedying of Environmental Damage.

  2. Integration of OHS into Risk Management in an Open-Pit Mining Project in Quebec (Canada

    Directory of Open Access Journals (Sweden)

    Adel Badri

    2011-09-01

    Full Text Available Despite undeniable progress, the mining industry remains the scene of serious accidents revealing disregard for occupational health and safety (OHS and leaving open the debate regarding the safety of its employees. The San José mine last collapse near Copiapó, Chile on 5 August 2010 and the 69-day rescue operation that followed in order to save 33 miners trapped underground show the serious consequences of neglecting worker health and safety. The aim of this study was to validate a new approach to integrating OHS into risk management in the context of a new open-pit mining project in Quebec, based on analysis of incident and accident reports, semi-structured interviews, questionnaires and collaborative field observations. We propose a new concept, called hazard concentration, based on the number of hazards and their influence. This concept represents the weighted fraction of each category of hazards related to an undesirable event. The weight of each category of hazards is calculated by AHP, a multicriteria method. The proposed approach included the creation of an OHS database for facilitating expert risk management. Reinforcing effects between hazard categories were identified and all potential risks were prioritized. The results provided the company with a rational basis for choosing a suitable accident prevention strategy for its operational activities.

  3. Stochastic Modeling Approach for the Evaluation of Backbreak due to Blasting Operations in Open Pit Mines

    Science.gov (United States)

    Sari, Mehmet; Ghasemi, Ebrahim; Ataei, Mohammad

    2014-03-01

    Backbreak is an undesirable side effect of bench blasting operations in open pit mines. A large number of parameters affect backbreak, including controllable parameters (such as blast design parameters and explosive characteristics) and uncontrollable parameters (such as rock and discontinuities properties). The complexity of the backbreak phenomenon and the uncertainty in terms of the impact of various parameters makes its prediction very difficult. The aim of this paper is to determine the suitability of the stochastic modeling approach for the prediction of backbreak and to assess the influence of controllable parameters on the phenomenon. To achieve this, a database containing actual measured backbreak occurrences and the major effective controllable parameters on backbreak (i.e., burden, spacing, stemming length, powder factor, and geometric stiffness ratio) was created from 175 blasting events in the Sungun copper mine, Iran. From this database, first, a new site-specific empirical equation for predicting backbreak was developed using multiple regression analysis. Then, the backbreak phenomenon was simulated by the Monte Carlo (MC) method. The results reveal that stochastic modeling is a good means of modeling and evaluating the effects of the variability of blasting parameters on backbreak. Thus, the developed model is suitable for practical use in the Sungun copper mine. Finally, a sensitivity analysis showed that stemming length is the most important parameter in controlling backbreak.

  4. Implementing a parametric maximum flow algorithm for optimal open pit mine design under uncertain supply and demand

    OpenAIRE

    M W A Asad; R Dimitrakopoulos

    2013-01-01

    Conventional open pit mine optimization models for designing mining phases and ultimate pit limit do not consider expected variations and uncertainty in metal content available in a mineral deposit (supply) and commodity prices (market demand). Unlike the conventional approach, a stochastic framework relies on multiple realizations of the input data so as to account for uncertainty in metal content and financial parameters, reflecting potential supply and demand. This paper presents a new met...

  5. Hyperspectral analysis for qualitative and quantitative features related to acid mine drainage at a remediated open-pit mine

    Science.gov (United States)

    Davies, G.; Calvin, W. M.

    2015-12-01

    The exposure of pyrite to oxygen and water in mine waste environments is known to generate acidity and the accumulation of secondary iron minerals. Sulfates and secondary iron minerals associated with acid mine drainage (AMD) exhibit diverse spectral properties in the ultraviolet, visible and near-infrared regions of the electromagnetic spectrum. The use of hyperspectral imagery for identification of AMD mineralogy and contamination has been well studied. Fewer studies have examined the impacts of hydrologic variations on mapping AMD or the unique spectral signatures of mine waters. Open-pit mine lakes are an additional environmental hazard which have not been widely studied using imaging spectroscopy. A better understanding of AMD variation related to climate fluctuations and the spectral signatures of contaminated surface waters will aid future assessments of environmental contamination. This study examined the ability of multi-season airborne hyperspectral data to identify the geochemical evolution of substances and contaminant patterns at the Leviathan Mine Superfund site. The mine is located 24 miles southeast of Lake Tahoe and contains remnant tailings piles and several AMD collection ponds. The objectives were to 1) distinguish temporal changes in mineralogy at a the remediated open-pit sulfur mine, 2) identify the absorption features of mine affected waters, and 3) quantitatively link water spectra to known dissolved iron concentrations. Images from NASA's AVIRIS instrument were collected in the spring, summer, and fall seasons for two consecutive years at Leviathan (HyspIRI campaign). Images had a spatial resolution of 15 meters at nadir. Ground-based surveys using the ASD FieldSpecPro spectrometer and laboratory spectral and chemical analysis complemented the remote sensing data. Temporal changes in surface mineralogy were difficult to distinguish. However, seasonal changes in pond water quality were identified. Dissolved ferric iron and chlorophyll

  6. Limnological and fisheries investigation of the flooded open pit at the Gunnar uranium mine

    International Nuclear Information System (INIS)

    The Gunnar uranium mine on the north shore of Lake Athabaska was closed in 1964 and became flooded. This study describes the physical, chemical and biological characteristics of the water-filled open pit mine. Depth profiles of temperature, dissolved oxygen and specific conductivity indicated the presence of five strata in the 110 m-deep lake during the summer. Radionuclides and dissolved salts were concentrated in the deepest layer, where there was almost no dissolved oxygen and living organisms. The concentrations of heavy metals except uranium are generally very low at all depths. Surface levels of radium 226, thorium, uranium and lead 210 are low. There is no surface seepage out of the pit. Bacteria and phytoplankton populations are typical of those found in warm nutrient-rich waters; the total number of species is low, but there is a large number of individuals. No benthic species are present at the bottom or at 82.5 m. Northern pike, common suckers, and longnose suckers were caught; all appeared to be in good condition and larger than individuals of the same age in the neighbouring lakes. Radionuclide levels in their flesh were one to two orders of magnitude greater than background

  7. Stability analysis of the open-pit mine slope and the study on the incensement of the slope angle

    Institute of Scientific and Technical Information of China (English)

    LIU Bao-xu(刘宝许); QIAO Lan(乔兰); LAI Xing-ping(来兴平)

    2004-01-01

    Based on the exploration of the engineering geology and the rock mechanics testing, limit equilibrium analysis method was adopted to calculate the stability of the Huogeqi Copper Mine slope, the results show that the original slope angle is too conservative and the slope have the potential of more preferable slope angle. In order to discuss the possibility of slope angle enhancement, sensitivity analysis of parameters related to limit state slope was made. Quantitatively determined angle value of the adding and the optimal slope angle was obtained. The study having performed showed that it is not only useful for the safety control of open-pit mine slope but also for the open-pit mine design for the similar geological condition.

  8. Restoration of open pit lignite mining in the former GDR: lessons to be learnt from Zwenkau

    Energy Technology Data Exchange (ETDEWEB)

    Wiegand, U.; Schreck, P.; Schreiter, P.; Lerche, I.; Glaesser, W. [Centre for Environmental Research Leipzig-Halle (UFZ), Halle (Germany) Dept. of Hydrogeology

    2003-07-01

    The interactions have been investigated between the near-surface sediments of the sediment dumping at the Zwenkau open pit near Leipzig, used for extraction of lignite, and the produced mining water. These environmental impacts are the legacy of the energy policy of the former GDR. The pyrite oxidation that takes place in the overburden sediments causes the formation of an oxidation front and the pH-value of sediments falls to about 2 to 3 very soon after deposition. The primary mineral contents are destroyed and a considerable number of elements are mobilized that remain locally in the sediment pores. Because of the very weak seepage, rainfall remains in the alluvial areas as so called dump lakes. The dump lakes are very acidic because the rainwater transport the mobilized elements from the surface. Autochthonous and allochthonous formations of secondary minerals have been observed and analysed. A continuously ongoing interaction of exogenous and endogenous effects hinders the hydrological and geochemical equilibrium stabilization. What to do with such a 'moonscape' is considered in the conclusions. 21 refs., 8 figs.

  9. Automatic monitoring system for high-steep slope in open-pit mine based on GPS and data analysis

    Science.gov (United States)

    Zhou, Chunmei; Li, Xianfu; Qin, Sunwei; Qiu, Dandan; Wu, Yanlin; Xiao, Yun; Zhou, Jian

    2008-12-01

    Recently, GPS has been more and more applicative in open pit mine slope safety monitoring. Daye Iron Mine open pit high-steep slope automatic monitoring system mainly consists of three modules, namely, GPS data processing module, monitoring and warning module, emergency plans module. According to the rock mass structural feature and the side slope stability evaluation, it is arranged altogether to seven GPS distortion monitoring points on the sharp of Fault F9 at Daye iron Mine, adopted the combination of monofrequent static GPS receiver and data-transmission radio to carry on the observation, the data processing mainly uses three transect interpolation method to solve the questions of discontinuity and Effectiveness in the data succession. According to the displacement monitoring data from 1990 to 1996 of Daye Iron Mine East Open Pit Shizi mountain Landslide A2, researching the displacement criterion, rate criterion, acceleration criterion, creep curve tangent angle criterion etc of landslide failure, the result shows that the landslide A2 is the lapse type crag nature landslide whose movement in three phases, namely creep stage, accelerated phase, destruction stage. It is different of the failure criterion in different stages and different position that is at the rear, central, front margin of the landslide. It has important guiding significance to put forward the comprehensive failure criterion of seven new-settled monitoring points combining the slope deformation destruction and macroscopic evidence.

  10. Numerical modelling of the groundwater inflow to an advancing open pit mine: Kolahdarvazeh pit, Central Iran.

    Science.gov (United States)

    Bahrami, Saeed; Doulati Ardejani, Faramarz; Aslani, Soheyla; Baafi, Ernest

    2014-12-01

    The groundwater inflow into a mine during its life and after ceasing operations is one of the most important concerns of the mining industry. This paper presents a hydrogeological assessment of the Irankuh Zn-Pb mine at 20 km south of Esfahan and 1 km northeast of Abnil in west-Central Iran. During mine excavation, the upper impervious bed of a confined aquifer was broken and water at high-pressure flowed into an open pit mine associated with the Kolahdarvazeh deposit. The inflow rates were 6.7 and 1.4 m(3)/s at the maximum and minimum quantities, respectively. Permeability, storage coefficient, thickness and initial head of the fully saturated confined aquifer were 3.5 × 10(-4) m/s, 0.2, 30 m and 60 m, respectively. The hydraulic heads as a function of time were monitored at four observation wells in the vicinity of the pit over 19 weeks and at an observation well near a test well over 21 h. In addition, by measuring the rate of pumping out from the pit sump, at a constant head (usually equal to height of the pit floor), the real inflow rates to the pit were monitored. The main innovations of this work were to make comparison between numerical modelling using a finite element software called SEEP/W and actual data related to inflow and extend the applicability of the numerical model. This model was further used to estimate the hydraulic heads at the observation wells around the pit over 19 weeks during mining operations. Data from a pump-out test and observation wells were used for model calibration and verification. In order to evaluate the model efficiency, the modelling results of inflow quantity and hydraulic heads were compared to those from analytical solutions, as well as the field data. The mean percent error in relation to field data for the inflow quantity was 0.108. It varied between 1.16 and 1.46 for hydraulic head predictions, which are much lower values than the mean percent errors resulted from the analytical solutions (from 1.8 to 5

  11. Trace metal depositional patterns from an open pit mining activity as revealed by archived avian gizzard contents

    International Nuclear Information System (INIS)

    Archived samples of blue grouse (Dendragapus obscurus) gizzard contents, inclusive of grit, collected yearly between 1959 and 1970 were analyzed for cadmium, lead, zinc, and copper content. Approximately halfway through the 12-year sampling period, an open-pit copper mine began activities, then ceased operations 2 years later. Thus the archived samples provided a unique opportunity to determine if avian gizzard contents, inclusive of grit, could reveal patterns in the anthropogenic deposition of trace metals associated with mining activities. Gizzard concentrations of cadmium and copper strongly coincided with the onset of opening and the closing of the pit mining activity. Gizzard zinc and lead demonstrated significant among year variation; however, maximum concentrations did not correlate to mining activity. The archived gizzard contents did provide a useful tool for documenting trends in metal depositional patterns related to an anthropogenic activity. Further, blue grouse ingesting grit particles during the time of active mining activity would have been exposed to toxicologically significant levels of cadmium. Gizzard lead concentrations were also of toxicological significance but not related to mining activity. This type of 'pulse' toxic metal exposure as a consequence of open-pit mining activity would not necessarily have been revealed through a 'snap-shot' of soil, plant or avian tissue trace metal analysis post-mining activity. - Research Highlights: → Archived gizzard samples reveals mining history. → Grit ingestion exposes grouse to cadmium and lead. → Grit selection includes particles enriched in cadmium. → Cadmium enriched particles are of toxicological significance.

  12. SLOPE INSTABILITY IN OPEN PITS AND AN EXAMPLE OF A RETROSPECTIVE ANALYSIS: AFŞİN-ELBİSTAN-KIŞLAKÖY OPEN PIT COAL DEPOSIT

    OpenAIRE

    AKBULUT, İbrahim; ÇAM, İlker; AKSOY, Tahsin; ÇAĞLAN, Dinçer; ÖLMEZ, Tolga

    2013-01-01

    The subject of this study is to study the instabilities that have developed in the permanent east and west slopes of the Kışlaköy open pit of the Elektrik Üretim A.Ş. Afşin-Elbistan Linyitleri İşletmesi and to work out the sliding mechanism causing it. In the Kışlaköy open pit to establish if mass movement is continuing and if so which direction it would move, amount of mass to be involved and the failing model. Six movement control observations stations were established along 3 lines in each...

  13. Applications of state estimation in multi-sensor information fusion for the monitoring of open pit mine slope deformation

    Institute of Scientific and Technical Information of China (English)

    FU Hua; LIU Yin-ping; XIAO Jian

    2008-01-01

    The traditional open pit mine slope deformation monitoring system can not use the monitoring information coming from many monitoring points at the same time,can only using the monitoring data coming from a key monitoring point, and that is to say it can only handle one-dimensional time series. Given this shortage in the monitoring,the multi-sensor information fusion in the state estimation techniques would be introduced to the slope deformation monitoring system, and by the dynamic characteristics of deformation slope, the open pit slope would be regarded as a dynamic goal, the condition monitoring of which would be regarded as a dynamic target tracking. Distributed Information fusion technology with feedback was used to process the monitoring data and on this basis Klman filtering algorithms was introduced, and the simulation examples was used to prove its effectivenes.

  14. Underground Pumped Storage Hydroelectricity using Abandoned Works (open pits and deep mines)

    Science.gov (United States)

    Pujades, E.; Willems, T.; Bodeux, S.; Orban, P.; Dassargues, A.

    2015-12-01

    Pumped Storage Hydroelectricity (PSH) is a good alternative to increase the efficiency of power plants, which cannot regulate the amount of electricity generated according to the demand (wind, solar or even nuclear power plants). PSH plants, which consist in two reservoirs located at different heights (upper and lower), can store energy during low demand periods (pumping water from the lower to the upper reservoir) and generate electricity during the high demand peaks (falling water from the upper to the lower reservoir). Given that the two reservoirs must be located at different heights, PSH plants cannot be constructed in flat regions. Nevertheless, in these regions, an alternative could be to use abandoned underground works (open pits or deep mines) as lower reservoirs to construct Underground Pumped Storage Hydroelectricity (UPSH) plants. To select the best place to construct a plant, two considerations must be taken into account regarding the interaction between UPSH plants and groundwater: 1) the alteration of the natural conditions of aquifers and 2), the efficiency of the plant since the electricity generated depends on the hydraulic head inside the underground reservoir. Obviously, a detailed numerical model must be necessary before to select a location. However, a screening methodology to reject the most disadvantageous sites in a short period of time would be useful. Groundwater flow impacts caused by UPSH plants are analyzed numerically and the main variables involved in the groundwater evolution are identified. The most noticeable effect consists in an oscillation of the groundwater. The hydraulic head around which groundwater oscillates, the magnitude of the oscillations and the time to achieve a "dynamic steady state" depend on the boundaries, the parameters of the aquifer and the characteristics of the underground reservoir. A screening methodology is proposed to assess the main impacts caused in aquifers by UPSH plants. Finally, the efficiency

  15. Stability analysis of the sliding process of the west slope in Buzhaoba Open-Pit Mine

    Institute of Scientific and Technical Information of China (English)

    Ning Fang; Ji Changsheng⇑; Garmondyu E. Crusoe Jr

    2016-01-01

    To study the stability of the west slope in Buzhaoba Open-Pit Mine and determine the aging stability coefficient during slide mass development, the deformation band of the west slope and the slide mass structure of the 34,600 profile are obtained on the basis of hydrology, geology, and monitoring data. The residual thrust method is utilized to calculate the stability coefficients, which are 1.225 and 1.00 under sound and transfixion conditions, respectively. According to the rock damage and fragmentation and the principle of mechanical parameter degradation, the mechanical models of the slide mass devel-opment of the hard and soft rock slopes are established. An integrated model for calculating the slope stability coefficient is built considering water, vibration, and other external factors that pertain to the structural plane damage mechanism and the generating mechanism of the sliding mass. The change curve of the stability coefficient in the slide mass development is obtained from the relevant analyses, and afterwards, the stability control measures are proposed. The analysis results indicate that in the cracking stage of the hard rock, the slope stability coefficient decreases linearly with the increase in the length Lb of the hard rock crack zone. The linear slope is positively correlated to rock cohesion c. In the transfixion stage of the soft rock, the decrease speed of the stability coefficient is positively correlated to the residual strength of the soft rock. When the slope is stable, the stability coefficient is in a quadratic-linear relationship with the decreased height Dh of the side slope and in a linear relationship with anchoring force P.

  16. Caracterización de Partículas Suspendidas (PST y Partículas Respirables (PM 10 producidas en Áreas de Explotación Carbonífera a Cielo Abierto Characterization of Total Suspended Particles (TSP and Inhalable Particulate Matter (PM 10 generated in Open Pit Coal Mining Areas

    Directory of Open Access Journals (Sweden)

    Luis C Angulo

    2011-01-01

    Full Text Available Se presenta una revisión de la literatura sobre la cuantificación y caracterización de partículas suspendidas (PST y partículas respirables (PM10 producidas en áreas de explotación carbonífera a cielo abierto. El material particulado es un contaminante complejo por sus características físicas (distribución de tamaño de partícula, morfología y densidad y por sus características químicas (compuestos orgánicos e inorgánicos, metales y contaminantes primarios y secundarios. Estas características son críticas para determinar el tipo y magnitud de los efectos sobre la salud humana. Se encontró que los trabajos realizados, han empleado experimentos de laboratorio y de campo, así como estudios de modelación. Esta revisión bibliográfica contribuye a una mejor comprensión y evaluación de las tecnologías que se deben usar para encontrar soluciones a este problema de contaminación.This article presents a literature review about the quantification and characterization of total suspended particles (TSP and inhalable particulate matter (PM 10 generated in open pit coal mining areas. Particle matter is a complex pollutant due to its physical characteristics (particle size distribution, morphology and density and its chemical characteristics (organic and inorganic components, metals, and primary and secondary pollutants. These characteristics are critical to determine the type and the magnitude of their effects on human health. It was found that the different works published in the literature have used lab and field experiments, and also modeling studies. This literature review contributes to improve the understanding and evaluation of technologies that must be used to find solutions to this atmospheric pollution problem.

  17. Towards the Application of Augmented Reality in the Mining Sector: Open-Pit Mines

    OpenAIRE

    Hugues, Olivier; Gbodossou, André; Cieutat, Jean-Marc

    2012-01-01

    This article put augmented reality technology, and its application in the mining sector, in perspective. The current vitality in the mining sector in Canada, and particularly in the province of Quebec, is leading decision-makers to use new technologies in a sector which is nevertheless quite traditionalist. An exploration of the different activities connected to mining operations in order to identify the potential relevance of the use of augmented reality in this sector is shown. This analysi...

  18. Underground pumped storage hydroelectricity using abandoned works (deep mines or open pits) and the impact on groundwater flow

    Science.gov (United States)

    Pujades, Estanislao; Willems, Thibault; Bodeux, Sarah; Orban, Philippe; Dassargues, Alain

    2016-09-01

    Underground pumped storage hydroelectricity (UPSH) plants using open-pit or deep mines can be used in flat regions to store the excess of electricity produced during low-demand energy periods. It is essential to consider the interaction between UPSH plants and the surrounding geological media. There has been little work on the assessment of associated groundwater flow impacts. The impacts on groundwater flow are determined numerically using a simplified numerical model which is assumed to be representative of open-pit and deep mines. The main impact consists of oscillation of the piezometric head, and its magnitude depends on the characteristics of the aquifer/geological medium, the mine and the pumping and injection intervals. If an average piezometric head is considered, it drops at early times after the start of the UPSH plant activity and then recovers progressively. The most favorable hydrogeological conditions to minimize impacts are evaluated by comparing several scenarios. The impact magnitude will be lower in geological media with low hydraulic diffusivity; however, the parameter that plays the more important role is the volume of water stored in the mine. Its variation modifies considerably the groundwater flow impacts. Finally, the problem is studied analytically and some solutions are proposed to approximate the impacts, allowing a quick screening of favorable locations for future UPSH plants.

  19. The Experience of Implementation of Innovative Technology of Quarry Waste Water Purifying in Kuzbass Open Pit

    Science.gov (United States)

    Lesin, Yu V.; Hellmer, M. C.

    2016-08-01

    Among all industries in Kuzbass (Western Siberia, Russia) the coal industry provides the most environmental threat. However, the construction of new and maintenance of existing open pit mines do not often correspond to the tasks of improving the environmental safety of surface mining. So the article describes the use of innovative quarry waste water purifying technology implemented in Kuzbass open pit mine «Shestaki». This technology is based on using artificial filter arrays made of overburden rock.

  20. Application of waste mushroom on land reclamation in the refuse dump of Haizhou Open-pit Mines

    Institute of Scientific and Technical Information of China (English)

    FAN Jun-fu; WANG Xiu-lan

    2009-01-01

    In order to rapidly increase the degree of maturation of the soil in land reclama-tion of the refuse dump of the Haizhou open-pit mines,the application of waste mushroom in the process of soil improvement in the dump was studied.Through the research on plant growth,root development and microbial changes in soil and change of physical and chemical characteristics of the plot,the result shows that waste mushroom can increase the degree of maturation of the soil and improve soil fertility.

  1. Bench stability in open pit mines : a methodology for jointed rock masses

    OpenAIRE

    Baroudi, Hafid; D. Hantz; Asof, P.D.; Piguet, Jack-Pierre

    1992-01-01

    The methods used to determine the overall gradients of the slopes in open pit workings aim to sufficiently eliminate all risk of failure on a scale comparable wich the pit walls. For this the slopes musc be made shallow gradual and reinforcing measures must generally be applied. Most often these consist of ensuring the drainage of the slopes and in limiting the effects of blasting (reinforcement is generally too costly in the case of very high slopes and deep planes of failure).

  2. Groundwater age, mixing and flow rates in the vicinity of large open pit mines, Pilbara region, northwestern Australia

    Science.gov (United States)

    Cook, Peter; Dogramaci, Shawan; McCallum, James; Hedley, Joanne

    2016-09-01

    Determining groundwater ages from environmental tracer concentrations measured on samples obtained from open bores or long-screened intervals is fraught with difficulty because the sampled water represents a variety of ages. A multi-tracer technique (Cl, 14C, 3H, CFC-11, CFC-12, CFC-113 and SF6) was used to decipher the groundwater ages sampled from long-screened production bores in a regional aquifer around an open pit mine in the Pilbara region of northwest Australia. The changes in tracer concentrations due to continuous dewatering over 7 years (2008-2014) were examined, and the tracer methods were compared. Tracer concentrations suggest that groundwater samples are a mixture of young and old water; the former is inferred to represent localised recharge from an adjacent creek, and the latter to be diffuse recharge. An increase in 14C activity with time in wells closest to the creek suggests that dewatering of the open pit to achieve dry mining conditions has resulted in change in flow direction, so that localised recharge from the creek now forms a larger proportion of the pumped groundwater. The recharge rate prior to development, calculated from a steady-state Cl mass balance, is 6 mm/y, and is consistent with calculations based on the 14C activity. Changes in CFC-12 concentrations with time may be related to the change in water-table position relative to the depth of the well screen.

  3. Availability-based simulation and optimization modeling framework for open-pit mine truck allocation under dynamic constraints

    Institute of Scientific and Technical Information of China (English)

    Mena Rodrigo; Zio Enrico; Kristjanpoller Fredy; Arata Adolfo

    2013-01-01

    We present a novel system productivity simulation and optimization modeling framework in which equipment availability is a variable in the expected productivity function of the system.The framework is used for allocating trucks by route according to their operating performances in a truck-shovel system of an open-pit mine,so as to maximize the overall productivity of the fleet.We implement the framework in an originally designed and specifically developed simulator-optimizer software tool.We make an application on a real open-pit mine case study taking into account the stochasticity of the equipment behavior and environment.The total system production values obtained with and without considering the equipment reliability,availability and maintainability (RAM) characteristics are compared.We show that by taking into account the truck and shovel RAM aspects,we can maximize the total production of the system and obtain specific information on the production availability and productivity of its components.

  4. Development and characterization of formulation of dust-suppressant used for stope road in open-pit mines

    Institute of Scientific and Technical Information of China (English)

    Cui-Feng DU; Li LI

    2013-01-01

    The components of dust-suppressant were determined based on the analysis on characteristics and mechanisms of road dust raising in open-pit mines.The components were initially selected from moisture agent,coagulation agent and surfactant.The optimal formulation was determined based on orthogonal test and using the water loss rate as the evaluation index.The performances of moisture releasing and adsorption,wind resistance of optimal formulation in the natural environment were tested.The results show that the formula obtained in experiments provide a good performance of moisture absorption and water retention,and it also had a good dust preventing and controlling performance due to its high surface strength and consolidation under dry conditions.It has good application prospects considering the wide variety of sources for materials and the simple preparation process.

  5. Radon Emission from Coal Mines of Kuzbass Region

    Science.gov (United States)

    Portola, V. A.; Torosyan, E. S.; Antufeyev, V. K.

    2016-04-01

    The article represents the results of a research in radionuclides concentration in coal and rocks of Kuzbass mines as well as radon concentration in operative mines and mined-out spaces. It is proved that radon concentration in mines is considerably higher than in the atmosphere and it rises drastically in the mined-out spaces. It is found out that radon is carried out from mines by ventilation flows and from open pits, generating anomalous concentrations over self-ignition areas.

  6. Prediction for relocation scale of rural settlements based on farming radius in reclamation area of open-pit coal mine%基于耕作半径的采矿复垦区农村居民点安置规模预测

    Institute of Scientific and Technical Information of China (English)

    胡兴定; 白中科

    2016-01-01

    耕作半径对农村居民点的规模具有重要影响,而地形则是耕作半径的决定因素之一。该文采用耕聚比和缓冲区分析的方法,对比采矿前后农村居民点的耕作半径变化。考虑研究区地形起伏的影响,计算耕作半径地形修正系数,确定最优耕作半径。在此基础上预测矿区复垦后可安置农村居民点的面积、数量及人口。研究结果表明:平朔复垦区农村居民点耕作半径地形修正系数为1.6836,复垦区规划农村居民点最优耕作半径为1500 m;复垦区预测回迁安置农村居民点总规模约651.24 hm2,共67个农村居民点;预测单个农村居民点面积9.72 hm2,控制耕地面积约109.68 hm2;预测回迁安置总人口约29521人,共7380户,该研究结果可为露天采矿复垦区农村居民点回迁安置规模与布局提供决策支持。%Mine reclamation has become a worldwide problem recently and has similar research directions both in China and abroad, including ecological restoration, mining technology, bioremediation technology, soil reconstruction techniques, soil quality testing, plant species selecting. The key target is to restore the ecological system and improve the environment. One of the main purposes of reclamation is to restore farmland, which is scarce in China. In addition, resettlement of residents and their living environment need to be taken into account. In this paper, the study area is the Pingshuo open-pit mine, which is located in Shuozhou City, Shanxi Province, China, and belongs to super-large open-pit mine with modern production. Mining activities began in 1987, and have lasted for 28 years until now. Fourteen rural settlements have moved, and resettlement population has reached 8400 by 2013.From the perspective of farming radius, buffer analysis of rural settlements was used to contrast the difference of farming radius before and after the open-pit mining by geographic information system

  7. Analysis of Purchasing Work on Open-pit-mines Strategic Spare Parts%露天煤矿战略备件物资采购工作浅析

    Institute of Scientific and Technical Information of China (English)

    刘慧智

    2012-01-01

      Open-pit-mines of Shenhua Group apply international advanced production equipment on coal mined, which has played an important role on improving the efficiency of coal production. Supporting the supply, purchasing and reserving equipments and strategic spare parts are important parts of ensuring safety in production. This article analyses the supply and demand status of large dump trucks mega tire on open-pit-mines of Shenhua Group, provided several suggestions on how to provide the material support of strategic spare parts supply capacity.%  神华集团露天煤矿应用国际先进的生产设备进行煤炭综合开采,对提高煤炭生产效率发挥了重要作用,煤炭开采作业关键设备战略备件的配套供应、采购与储备,成为保障安全生产的重要环节。本文通过对神华露天煤矿大型自卸式卡车巨型工程胎供需现状进行分析研究,对如何提高战略备件物资保障供应能力提出了建设性意见。

  8. Surpac Vision软件在某铜硫露天矿山的应用%Application of Surpac Vision Software in Copper-sulfur Open Pit Mine

    Institute of Scientific and Technical Information of China (English)

    江鹏飞; 许文飞; 陈继强

    2009-01-01

    利用Surpac Vision软件建立了某铜硫露天矿山三维模型,在此基础上,进行了露天境界圈定和方案比较,最终得出最优方案,并介绍了Surpac Vision软件在矿山生产管理中的应用.%A three-dimensional model of a copper-sulfur open pit mine was established with the aid of Surpac Vision software. Based on this, boundary outlining of the open pit mine and plan comparison were made, and the final optimum plan was gained. The application of Surpac Vision software in mine production management was presented.

  9. Multi-temporal and multi-platforms remote sensing data for the analysis of open-pit mining earth surface dynamics

    Science.gov (United States)

    Feng, Zengwen; Chen, Jianping; Li, Ke; Tarolli, Paolo

    2015-04-01

    Open-pit mining activities can affect the earth surface processes inducing soil erosion, landslides, and subsidence. The recognition and the analysis of mining induced Earth surface changes and the related processes represent, therefore, a challenge for a sustainable environmental planning for those regions affected by an intense mining activity. The purpose of this study is to monitor the effects of open-pit mining and the associated landform processes using multi-temporal and multi-platforms remote sensing data. The study area consists in an open-pit mine located in Miyun county, northern Beijing. For the study area different datasets are available for different years: a GeoEye image (2011, res. 1m/pix), two pairs of Cartosat - 1 stereo pairs (2009, 2012, res. 2.5m/pix) from which we extracted two DSMs (res. 5m/pix), an UAV aerial photograph (2014, res. 0.07m) and the derived DSM (2014, res. 0.1m). We also obtained a DTM (2014, res. 1m) from terrestrial laser scanner (TLS) and a DSM (2014, res. 0.5m) using the Structure from Motion (SfM) technique by a camera. These data served as the basis to recognize, through the application of morphometric indicators, the areas subject to erosion and landsliding. A volumetric estimate of soil loss from 2009 to 2014 has been also quantified using the multiple DSMs provided by the multi-platform. The recognition and the analysis of earth surface dynamics using low-cost multi-temporal and multi-platforms remote sensing such as SfM and UAVs represents a useful tool to mitigate the environmental consequences open-pit mining, and to mitigate the related natural disaster and risk.

  10. An application of discrete mathematics in the design of an open pit mine

    Energy Technology Data Exchange (ETDEWEB)

    Caccetta, L.; Giannini, L.M.

    1988-09-01

    The determination of the 'optimum pit limit' of a mine is considered to be a fundamental problem in mine planning as it provides information which is essential in the evaluation of the economic potential of a mineral deposit, and in the formulation of long-, intermediate-, and short-range mine plans. A number of mathematical techniques have been proposed to solve this problem, some of the more elaborate ones posing considerable computational problems. In this paper we discuss the development and implementation of a graph-theoretic technique originally proposed by Lerchs and Grossman. Our implementation strategy involves the use of a dynamic programming technique to 'bound' the optimum. 19 refs., 4 figs.

  11. Underground Pumped Storage Hydropower using abandoned open pit mines: influence of groundwater seepage on the system efficiency

    Science.gov (United States)

    Pujades, Estanislao; Bodeux, Sarah; Orban, Philippe; Dassargues, Alain

    2016-04-01

    Pumped Storage Hydropower (PSH) plants can be used to manage the production of electrical energy according to the demand. These plants allow storing and generating electricity during low and high demand energy periods, respectively. Nevertheless, PSH plants require a determined topography because two reservoirs located at different heights are needed. At sites where PSH plants cannot be constructed due to topography requirements (flat regions), Underground Pumped Storage Hydropower (UPSH) plants can be used to adjust the electricity production. These plants consist in two reservoirs, the upper one is located at the surface (or at shallow depth) while the lower one is underground (or deeper). Abandoned open pit mines can be used as lower reservoirs but these are rarely isolated. As a consequence, UPSH plants will interact with surrounding aquifers exchanging groundwater. Groundwater seepage will modify hydraulic head inside the underground reservoir affecting global efficiency of the UPSH plant. The influence on the plant efficiency caused by the interaction between UPSH plants and aquifers will depend on the aquifer parameters, underground reservoir properties and pumping and injection characteristics. The alteration of the efficiency produced by the groundwater exchanges, which has not been previously considered, is now studied numerically. A set of numerical simulations are performed to establish in terms of efficiency the effects of groundwater exchanges and the optimum conditions to locate an UPSH plant.

  12. Ground-based multispectral measurements for airborne data verification in non-operating open pit mine "Kremikovtsi"

    Science.gov (United States)

    Borisova, Denitsa; Nikolov, Hristo; Petkov, Doyno

    2013-10-01

    The impact of mining industry and metal production on the environment is presented all over the world. In our research we set focus on the impact of already non-operating ferrous "Kremikovtsi"open pit mine and related waste dumps and tailings which we consider to be the major factor responsible for pollution of one densely populated region in Bulgaria. The approach adopted is based on correct estimation of the distribution of the iron oxides inside open pit mines and the neighboring regions those considered in this case to be the key issue for the ecological state assessment of soils, vegetation and water. For this study the foremost source of data are those of airborne origin and those combined with ground-based in-situ and laboratory acquired data were used for verification of the environmental variables and thus in process of assessment of the present environmental status influenced by previous mining activities. The percentage of iron content was selected as main indicator for presence of metal pollution since it could be reliably identified by multispectral data used in this study and also because the iron compounds are widely spread in the most of the minerals, rocks and soils. In our research the number of samples from every source (air, field, lab) was taken in the way to be statistically sound and confident. In order to establish relationship between the degree of pollution of the soil and mulspectral data 40 soil samples were collected during a field campaign in the study area together with GPS measurements for two types of laboratory measurements: the first one, chemical and mineralogical analysis and the second one, non-destructive spectroscopy. In this work for environmental variables verification over large areas mulspectral satellite data from Landsat instruments TM/ETM+ and from ALI/OLI (Operational Land Imager) were used. Ground-based (laboratory and in-situ) spectrometric measurements were performed using the designed and constructed in Remote

  13. A Study of Soil and Water Conservation in Open Pit Quarry Mining%露天石矿开采工程水土保持研究

    Institute of Scientific and Technical Information of China (English)

    王可可; 白晓敏

    2014-01-01

    In combination with one example of open pit quarry mining, a prediction and analysis are made on the soil ero-sion as well as its harm produced in the construction of the open pit quarry mining project. The general objective for its control and the prevention measures are determined. The focus of the monitoring of the soil erosion and the functions of the soil and water conservation measures are analyzed. Finally, the focus of the soil and water conservation in the construction of open pit quarry mining projects is summarized.%结合露天石矿开采建设的实例,对露天石矿开采项目建设会产生的水土流失进行预测及危害分析,并确定了总体防治目标及防治措施布设,分析了水土流失监测重点及水土保持措施功能,总结了露天石矿开采建设项目水土保持工作中的重点。

  14. A Study of Soil and Water Conservation in Open Pit Quarry Mining%露天石矿开采工程水土保持研究

    Institute of Scientific and Technical Information of China (English)

    王可可; 白晓敏

    2014-01-01

    结合露天石矿开采建设的实例,对露天石矿开采项目建设会产生的水土流失进行预测及危害分析,并确定了总体防治目标及防治措施布设,分析了水土流失监测重点及水土保持措施功能,总结了露天石矿开采建设项目水土保持工作中的重点。%In combination with one example of open pit quarry mining, a prediction and analysis are made on the soil ero-sion as well as its harm produced in the construction of the open pit quarry mining project. The general objective for its control and the prevention measures are determined. The focus of the monitoring of the soil erosion and the functions of the soil and water conservation measures are analyzed. Finally, the focus of the soil and water conservation in the construction of open pit quarry mining projects is summarized.

  15. Sub-pixel method for analysis of optical data in determining the overburden dumps and open pit mines

    Science.gov (United States)

    Borisova, D.; Nikolov, H.; Petkov, D.; Banushev, B.

    2011-11-01

    Mining plants are one of the factors having major negative impact on the area where they are situated. In our study this is the case of the mine production plant consisting of Elacite mine and Mirkovo floatation plant both located in central part of Stara Planina Mountain. In this study an attempt is made to delineate the overburden dumps and open pit mines by means of remotely sensed multispectral data with moderate spatial resolution (e.g. Landsat TM/ETM+ 30m) is a challenging task. The major difficulties arise from: 1) large period using the dump (introducing the need for multitemporal data); 2) the unknown proportions of vegetation, soil and embedding rock samples in the boundary areas and their seasonal variations; 3) relatively restricted access to places of interest. A variety of methods have been proposed to overcome the problems with pixels corresponding to two or more end-members, but a promising one is the soft classification which assign single pixel to several land cover classes in proportion to the area of the pixel that each class covers. In this scenario for every pixel of the data the correct proportion of the end-members should be found and then co-registered with the corresponding original pixel. As a result this sub-pixel classification procedure generates a number of fraction images equal to the number of land cover classes (end-members). The sub-pixel mapping algorithms we have exploited so far have one property in common: accuracy assessment of sub-pixel mapping algorithms is not easy because of missing high resolution ground truth data. One possible solution is to incorporate in the method adopted additional ex-situ and in-situ measured data from field and laboratory spectrometers with bandwidth about 1 nm. This study presents a successful implementation of soft classification method with additional, precise spectrometric data for determination of dump areas of the copper plant and open ore mine. The results achieved are proving that the in

  16. Integrating geological uncertainty in long-term open pit mine production planning by ant colony optimization

    Science.gov (United States)

    Gilani, Seyed-Omid; Sattarvand, Javad

    2016-02-01

    Meeting production targets in terms of ore quantity and quality is critical for a successful mining operation. In-situ grade uncertainty causes both deviations from production targets and general financial deficits. A new stochastic optimization algorithm based on ant colony optimization (ACO) approach is developed herein to integrate geological uncertainty described through a series of the simulated ore bodies. Two different strategies were developed based on a single predefined probability value (Prob) and multiple probability values (Pro bnt), respectively in order to improve the initial solutions that created by deterministic ACO procedure. Application at the Sungun copper mine in the northwest of Iran demonstrate the abilities of the stochastic approach to create a single schedule and control the risk of deviating from production targets over time and also increase the project value. A comparison between two strategies and traditional approach illustrates that the multiple probability strategy is able to produce better schedules, however, the single predefined probability is more practical in projects requiring of high flexibility degree.

  17. The environment of coal mining areas and the economic evaluation of the land reclamation

    Institute of Scientific and Technical Information of China (English)

    王志宏; 肖兴田; 何志强

    2001-01-01

    The environment impact of the coal resources mining was analyzed. The method of economic evaluation for the coal mining was established to analyze land destruction. The opportunity cost method was used to quantitatively analyze and estimate the economic loss of the land destruction by coal mining. At the same time, the dump land reclamation of the Yuanbaoshan. Open Pit was taken as an example to evaluate environmental and economical benefit with the method of economic evaluation for the coal mining areas land reclamation.

  18. Influence law of multipoint vibration load on slope stability in Xiaolongtan open pit mine in Yunnan, China

    Institute of Scientific and Technical Information of China (English)

    韩流; 舒继森; N.R. HANIF; 席文佳; 李鑫; 靖洪文; 马力

    2015-01-01

    The purpose of this work was to explore the influence law of vibration load on rock mass structure and slope stability. Based on the type and transmission way of vibration stress wave, the main stress in the horizontal and vertical directions was analyzed and the superposition effect of the stress wave was revealed. After the mechanical analysis of the sliding mass, the calculation formulas of the anti-sliding force and the sliding force were derived and the damage mechanism of blasting vibration to the structural plane was defined. In addition, according to the structure and lithologic parameter of the slope as well as the vibration monitoring data, the west slope stability of Xiaolongtan open pit mine was analyzed. The results show that the time-dependent stability factor is proportional to the vibration speed and the peak values appear at the same time. Vibration load promotes the breakage of the structural plane leading to the drop of the west slope stability factor by 0.23%. Under the multipoint simultaneous blasting, the fluctuating laws of the stability factors are consistent. The more the start-up points are, the higher the weakening degree to the slope stability is. Under the multipoint allochronic blasting, the stability factor depends on the synthetic waveform structure of all vibration waves. The greater the blasting time difference is, the lower the weakening degree to the slope stability is. Selecting the reasonable quantity of start-up points and time difference could fully reduce the adverse influence of vibration load to slope stability.

  19. Field measurements of mixed exposure of operators to radioactive aerosol, gas and quartz in confinement of mining equipment cabs during open-pit mining of high-grade uranium ores

    International Nuclear Information System (INIS)

    A series of field measurements of miners mixed exposure to radon and daughters, uranium ore dust and respirable quartz, was conducted in an open-pit mine in Northern Saskatchewan during 1980-81. Control of radon gas levels in the mining equipment cabs is required. Dust may be reduced by minimizing the resuspension of dust from contaminated surfaces within the cabs

  20. Analysis of the Potential for Use of Floating Photovoltaic Systems on Mine Pit Lakes: Case Study at the Ssangyong Open-Pit Limestone Mine in Korea

    Directory of Open Access Journals (Sweden)

    Jinyoung Song

    2016-02-01

    Full Text Available Recently, the mining industry has introduced renewable energy technologies to resolve power supply problems at mines operating in polar regions or other remote areas, and to foster substitute industries, able to benefit from abandoned sites of exhausted mines. However, little attention has been paid to the potential placement of floating photovoltaic (PV systems operated on mine pit lakes because it was assumed that the topographic characteristics of open-pit mines are unsuitable for installing any type of PV systems. This study analyzed the potential of floating PV systems on a mine pit lake in Korea to break this misconception. Using a fish-eye lens camera and digital elevation models, a shading analysis was performed to identify the area suitable for installing a floating PV system. The layout of the floating PV system was designed in consideration of the optimal tilt angle and array spacing of the PV panels. The System Advisor Model (SAM by National Renewable Energy Laboratory, USA, was used to conduct energy simulations based on weather data and the system design. The results indicated that the proposed PV system could generate 971.57 MWh/year. The economic analysis (accounting for discount rate and a 20-year operational lifetime showed that the net present value would be $897,000 USD, and a payback period of about 12.3 years. Therefore, we could know that the economic effect of the floating PV system on the mine pit lake is relatively higher than that of PV systems in the other abandoned mines in Korea. The annual reduction of greenhouse gas emissions was analyzed and found to be 471.21 tCO2/year, which is twice the reduction effect achieved by forest restoration of an abandoned mine site. The economic feasibility of a floating PV system on a pit lake of an abandoned mine was thus established, and may be considered an efficient reuse option for abandoned mines.

  1. Integration of UAV-Based Photogrammetry and Terrestrial Laser Scanning for the Three-Dimensional Mapping and Monitoring of Open-Pit Mine Areas

    Directory of Open Access Journals (Sweden)

    Xiaohua Tong

    2015-05-01

    Full Text Available This paper presents a practical framework for the integration of unmanned aerial vehicle (UAV based photogrammetry and terrestrial laser scanning (TLS with application to open-pit mine areas, which includes UAV image and TLS point cloud acquisition, image and cloud point processing and integration, object-oriented classification and three-dimensional (3D mapping and monitoring of open-pit mine areas. The proposed framework was tested in three open-pit mine areas in southwestern China. (1 With respect to extracting the conjugate points of the stereo pair of UAV images and those points between TLS point clouds and UAV images, some feature points were first extracted by the scale-invariant feature transform (SIFT operator and the outliers were identified and therefore eliminated by the RANdom SAmple Consensus (RANSAC approach; (2 With respect to improving the accuracy of geo-positioning based on UAV imagery, the ground control points (GCPs surveyed from global positioning systems (GPS and the feature points extracted from TLS were integrated in the bundle adjustment, and three scenarios were designed and compared; (3 With respect to monitoring and mapping the mine areas for land reclamation, an object-based image analysis approach was used for the classification of the accuracy improved UAV ortho-image. The experimental results show that by introduction of TLS derived point clouds as GCPs, the accuracy of geo-positioning based on UAV imagery can be improved. At the same time, the accuracy of geo-positioning based on GCPs form the TLS derived point clouds is close to that based on GCPs from the GPS survey. The results also show that the TLS derived point clouds can be used as GCPs in areas such as in mountainous or high-risk environments where it is difficult to conduct a GPS survey. The proposed framework achieved a decimeter-level accuracy for the generated digital surface model (DSM and digital orthophoto map (DOM, and an overall accuracy of 90

  2. The 2000/60/EC Water Framework Directive and the Flooding of the Brown Coal Meirama Open Pit (NW Spain)

    Science.gov (United States)

    Delgado, J.; Juncosa, R.

    2009-04-01

    Coal mining in Galicia (NW Spain) has been an important activity which came to an end in December, 2007. Hence, for different reasons, the two large brown coal mines in Galicia (the As Pontes mine, run by ENDESA GENERACIÓN, and the Meirama mine, owned by Lignitos de Meirama, S.A., LIMEISA), have started closure procedures, both of which are considering the flooding of the mine pits to create two large lakes (~8 km2 in As Pontes and ~2 km2 in Meirama). They will be unique in Galicia, a nearly lake-free territory. An important point to consider as regards the flooding of the lignite mine pits in Galicia is how the process of the creation of a body of artificial water will adapt to the strict legal demands put forth in the Water Framework Directive. This problem has been carefully examined by different authors in other countries and it raises the question of the need to adapt sampling surveys to monitor a number of key parameters -priority substances, physical and chemical parameters, biological indicators, etc.- that cannot be overlooked. Flooding, in both cases consider the preferential entrance into the mine holes of river-diverted surface waters, in detriment of ground waters in order to minimize acidic inputs. Although both mines are located in the same hydraulic demarcation (i.e. administrative units that, in Spain, are in charge of the public administration and the enforcement of natural water-related laws) the problems facing the corresponding mine managers are different. In the case of Meirama, the mine hole covers the upper third part of the Barcés river catchment, which is a major source of water for the Cecebre reservoir. That reservoir constitutes the only supply of drinking water for the city of A Coruña (~250.000 inhabitants) and its surrounding towns. In this contribution we will discuss how mine managers and the administration have addressed the uncertainties derived from the implementation of the Water Framework Directive in the particular case of

  3. FUNCTIONS OF HYDROLOGICAL OBJECTS IN THE AREAS OF POST-MINING OPEN PIT “WŁADYSŁAWÓW”

    Directory of Open Access Journals (Sweden)

    Mirosława Maria Gilewska

    2015-10-01

    Full Text Available Operated by lignite mine “Adams” coal deposits are located in the upland area of ​​the Turkish, belonging to the South Plains macro-region of Wielkopolska. A feature of this region are not only low rainfall, but also the lack of water reservoirs and large rivers. Mining activity has caused major changes in the hydrological network, not just for liquidation, postpone or reconstruction of riverbeds, but also the creation of new objects that collect water. These include settling the waters “dirty”, as well as reservoirs formed in excavation voids as part of a water reclamation. After the end of coal mining operation of these facilities is dependent on hydrology and hydraulic engineering conditions. This problem will be shown on the example of dirty water clarifier and final excavation undergoing water reclamation opencast mining areas Władysławów. Outcrop ended its activities in 2013. The final excavation is no outflow basin with a capacity of 42 million m3, located within the river basin Topiec constituting the left-hand tributary of the Warta.

  4. Application of reliability-centered maintenance for productivity improvement of open pit mining equipment:Case study of Sungun Copper Mine

    Institute of Scientific and Technical Information of China (English)

    Amin Moniri Morad; Mohammad Pourgol-Mohammad; Javad Sattarvand

    2014-01-01

    Equipment plays an important role in open pit mining industry and its cost competence at efficient operation and maintenance techniques centered on reliability can lead to significant cost reduction. The application of optimal maintenance process was investigated for minimizing the equipment breakdowns and downtimes in Sungun Copper Mine. It results in the improved efficiency and productivity of the equipment and lowered expenses as well as the increased profit margin. The field operating data of 10 trucks are used to estimate the failure and maintenance profile for each component, and modeling and simulation are accomplished by using reliability block diagram method. Trend analysis was then conducted to select proper probabilistic model for maintenance profile. Then reliability of the system was evaluated and importance of each component was computed by weighted importance measure method. This analysis led to identify the items with critical impact on availability of overall equipment in order to prioritize improvement decisions. Later, the availability of trucks was evaluated using Monte Carlo simulation and it is revealed that the uptime of the trucks is around 11000 h at 12000 operation hours. Finally, uncertainty analysis was performed to account for the uncertainty sources in data and models.

  5. Numerical simulation study of the influence on stability of slope by underground mining under opencast coal mine slope

    Institute of Scientific and Technical Information of China (English)

    LIU Ting-ting; LU Guo-bin; TONG Li-ming

    2011-01-01

    In view of the study on mining transferred from open-pit to underground,the research on the problem of the stability of slope is less.This article combined the actual situation of the Gaohai Coal Mine in Fuxin City and set up a three-dimensional model of the part of Huizhou open-pit slope by the finite difference software.Through the three-dimensional numerical simulation study of the influence on the stability of slope by underground mining,the basic characteristics of the open-pit slope deformation and the situation of basic stability were discussed.The simulation results of the mining slope of the displacement and deformation analysis of the state for mining provide a reference to the slope stability research.

  6. Detection and Monitoring of Surface Motions in Active Open Pit Iron Mine in the Amazon Region, Using Persistent Scatterer Interferometry with TerraSAR-X Satellite Data

    Directory of Open Access Journals (Sweden)

    Marcos E. Hartwig

    2013-09-01

    Full Text Available Persistent Scatterer interferometry (PSI represents a powerful tool for the detection and monitoring of tiny surface deformations in vast areas, allowing a better understanding of its triggering mechanisms, planning of mitigation measures, as well as to find better solutions for social and environmental issues. However, there is no record hitherto of its use in active open pit mine in tropical rainforest environment. In this paper we evaluate the use of the PSI technique for the detection and monitoring of mine slope deformations in the N4W iron mine and its surroundings, Pará State, Northern Brazil. The PSI processing was performed with 18 ascending SAR scenes of the TerraSAR-X satellite acquired in the dry season of 2012. The results showed a significant number of widely distributed persistent scatterers. It was observed that most of the study area was stable during the time span. Nevertheless, high deformation rates (312 mm/year were mapped over the mine waste piles, but do not offer any hazard, since they are expected displacements of meters in magnitude for these manmade land structures. Additionally, it was mapped tiny deformation rates in both the east and west flanks of pits 1 and 2. The main underlying reasons can be assigned to the accommodation phenomena of very poor rock masses, to the local geometric variations of the slope cuts, to the geological contact between ironstones and the country rocks, to the exploitation activities, as well as to the major geological structures. This study showed the applicability of the PSI technique using TerraSAR-X scenes in active open pit mines in tropical moist environment. However, the PSI technique is not capable in providing real-time warnings, and faces limitations due to SAR viewing geometry. In this sense, we strongly recommend the use of radar scenes acquired in both ascending and descending orbits, which would also provide a more complete understanding of the deformation patterns.

  7. Prevention and control of coalfield fire technology: A case study in the Antaibao Open Pit Mine goaf burning area, China

    Institute of Scientific and Technical Information of China (English)

    Cao Kai; Zhong Xiaoxing; Wang Deming; Shi Guoqing; Wang Yanming; Shao Zhenlu

    2012-01-01

    It is very difficult to clearly detect the location of a burning area in a coal mine since it is hidden underground.So we conducted research on the distribution of the burning area before controlling it.Firstly,the original drilling technique was used to analyze and determine the loose and scope of caving of burning area through field test,and then obtained the gases and the temperature data in this area were according to the borehole data.By analyzing these data,we found out that the location of burning area concentrated in the loose and caving area; and finally,the location and development of the burning area within the tested area were accurately determined.Based on this theory,we used the ground penetrating radar (GPR) to find out the loose and caving scale in the burning area during the control process of the burning area,and then located the fire-extinguishing boreholes within target which we used to control burning fire in the section.A mobile comprehensive fire prevention and extinguishing system based on the three-phase foam fire prevention and control technique was then adopted and conducted in the burning area which took only 9 months to extinguish the 227,000 m2 of burning area of 9# coal.This control technology and experience will provide a very important reference to the control of other coalfield fire and hillock fire in the future.

  8. Complementary Use of Information from Space-Based Dinsar and Field Measuring Systems for Operational Monitoring Purposes in Open Pit Iron Mines of Carajas Mining Complex (brazilian Amazon Region)

    Science.gov (United States)

    Paradella, W. R.; Mura, J. C.; Gama, F. F.; Santos, A. R.; Silva, G. G.; Galo, M.; Camargo, P. O.; Silva, A. Q.

    2015-04-01

    Now spanning five simultaneous open-pit operations with exploration carried out through open pit benching, Carajas complex encompasses the world's largest iron reserves. Open pit mining operations in the area can lead to slope instabilities with risks to personnel, equipment and production due to intense excavations in rock products of low geomechanical quality, blasting practices and heavy precipitation. Thus, an effective prediction and management of surface deformations should be a key concern for the mining operations. The ground displacement monitoring techniques in Carajas include surface measurement techniques at discrete points (total station/reflective prisms) and over area using SSR (Slope Stability Radar, a ground based radar). On the other hand, DInSAR techniques are receiving relevance in the mining industry for reasons such a synoptic and continuous coverage without the need for ground instrumentation and a point-to-point good accuracy of measuring displacements (millimeter to centimeter scale) over a dense grid. Using a stack of 33 StripMap TerraSAR-X images acquired over Carajas covering the time span from March 2012 to April 2013, a monitoring approach is discussed based on the complementary use of information provided by DInSAR (DInSAR Time-Series and Persistent Scatterer Interferometry) and surface measuring techniques (total station/prisms, ground-based radar).

  9. Applying persistent scatterer interferometry for surface displacement mapping in the Azul open pit manganese mine (Amazon region) with TerraSAR-X StripMap data

    Science.gov (United States)

    Athayde Pinto, Carolina de; Paradella, Waldir Renato; Mura, José Claudio; Gama, Fabio Furlan; Ribeiro dos Santos, Athos; Silva, Guilherme Gregório; Hartwig, Marcos Eduardo

    2015-01-01

    The Azul mining complex, located in the Carajás Mineral Province, Amazon region, encompasses the most important manganese mine in Brazil. Vale S.A. company operates three simultaneous open pit excavations (mines 1, 2, and 3) in the area, which are conducted on rock alteration products of low geomechanical quality related to sandstones, siltstones, and a lateritic cover. In order to monitor ground deformation, 33 TerraSAR-X (TSX-1) StripMap images covering the period of March 2012-April 2013 were used in the investigation. An advanced differential interferometric synthetic aperture radar (A-DInSAR) approach based on persistent scatterer interferometry (PSI) using an interferometric point target analysis algorithm was applied, and the results showed that most of the area was considered stable during the time span of the synthetic aperture radar acquisitions. However, persistent scatterers (PS) with high deformation rates were mapped over a waste pile, probably related to settlements, and also along the north flank of mine 1, indicative of cut slope movements toward the center of the pit. A spatial relationship of geological structures with PS was observed for this sector of the mine, given by PS showing deformation rates concentrated along a structural corridor with faults, fractures, and folds related to the Carajás fault system. Though only ground-based radar measurements for wall benches of mine 1 were available for a short time period of the TSX-1 coverage, the PS movement patterns showed concordance with geotechnical field measurements. The investigation emphasized the important role that satellite-based A-DInSAR can play for deformation monitoring and risk assessment in this kind of mining area.

  10. Coal Mines Security System

    OpenAIRE

    Ankita Guhe; Shruti Deshmukh; Bhagyashree Borekar; Apoorva Kailaswar; Milind E. Rane

    2012-01-01

    Geological circumstances of mine seem to be extremely complicated and there are many hidden troubles. Coal is wrongly lifted by the musclemen from coal stocks, coal washeries, coal transfer and loading points and also in the transport routes by malfunctioning the weighing of trucks. CIL —Coal India Ltd is under the control of mafia and a large number of irregularities can be contributed to coal mafia. An Intelligent Coal Mine Security System using data acquisition method utilizes sensor, auto...

  11. The environment of coal mining areas and the economic evaluation of the land reclamation

    Institute of Scientific and Technical Information of China (English)

    WANG Zhi-hong; XIAO Xing-tian; HE Zhi-qiang

    2001-01-01

    The environment impact of the coal resources mining was analyzed. The method of economic evaluation for the coal mining was established to analyze lan d destruction. The opportunity cost method was used to quantitatively analyze an d estimate the economic loss of the land destruction by coal mining. At the same time, the dump land reclamation of the Yuanbaoshan Open Pit was taken as an exa mple to evaluate environmental and economical benefit with the method of economi c evaluation for the coal mining areas land reclamation.

  12. Modelling of environmental impacts of 140 years of open pit lignite mining and chemical industry on groundwater contaminants in the Bitterfeld area, Germany

    Energy Technology Data Exchange (ETDEWEB)

    Gossel, W.; Stollberg, R.; Wycisk, P. [Martin Luther Univ., Halle (Germany). Inst. of Geosciences, Dept. of Hydrogeology and Environmental Geology

    2010-07-01

    In this study, a groundwater flow and transport model was used to estimate the contamination of watersheds located in the Bitterfeld area in Germany. The contamination was caused by previous open pit lignite mining activities in the region as well as by contaminants from a chemical plant. A high resolution geological model of the area was used to parametrize the model. The region is geologically complex, with Pleistocene channels and gullies from the Saalenian age. The mining activities also disturbed or destroyed many geological structures in the region. A geological description was provided, as well as details of hydraulic conductivity, lithology, and hydrostratigraphy. The model was based on borehole data and maps covering a total area of 60 km{sup 2}. The time-dependent groundwater recharge and boundary conditions were set. Dispersivity and diffusivity parameters were also considered. The model accurately characterized the successive spreading of groundwater contamination over the last 100 years in the area. The study showed that the contamination will spread to nature reserve zones in the region over the next few decades. 3 refs. 1 tab., 2 figs.

  13. Mining Scheme for Ore Body Outside the Open-pit Limit of Shachang Iron Ore%沙厂铁矿露天境界外矿体开采方案探讨

    Institute of Scientific and Technical Information of China (English)

    顾维朋

    2014-01-01

    借助计算机软件,采用浮动圆锥法,使用合理的产品经济技术指标对沙厂露天矿进行扩帮境界优化,并对露天扩帮开采方案的经济指标进行了分析,为矿山的持续发展确定科学合理的开采方案。%With the help of computer software,adopting float circular cone method,and using rational product economic and technical indexes, limit optimization of pit wall expansion is conducted for Shachang open-pit mine. The paper also analyses the economic indexes about open-pit expansion-wall mining scheme,determining scientific and rational mining option for mine’s continuous development.

  14. Coal Mine Permit Boundaries

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — ESRI ArcView shapefile depicting New Mexico coal mines permitted under the Surface Mining Control and Reclamation Act of 1977 (SMCRA), by either the NM Mining...

  15. Drillers and mill operators in an open-pit gold mine are at risk for impaired lung function

    OpenAIRE

    Vinnikov, Denis

    2016-01-01

    Background Occupational studies of associations of exposures with impaired lung function in mining settings are built on exposure assessment and far less often on workplace approach, so the aim of this study was to identify vulnerable occupational groups for early lung function reduction in a cohort of healthy young miners. Methods Data from annual screening lung function tests in gold mining company in Kyrgyzstan were linked to occupations. We compared per cent predicted forced expiratory vo...

  16. 大型露天矿规模化开采新工艺研究%Research on New Mining Technology of Large Scale Open Pit Mining

    Institute of Scientific and Technical Information of China (English)

    才庆祥; 尚涛; 周伟; 韩流

    2016-01-01

    The numbers of mining pits and mining technology systems under large scale mining adopted in surface mining areas have become the key issue in China’s rapid expansion of surface coal mines. After analyzing influence factors of mining technology system selection, applicable conditions and spatial distribution of single mining technology system, key mining technology system and other mining technology systems, the paper has classified the combined mining technology systems, and summarized the characteristics and applicable conditions of various combined mining technology systems. Based on fuzzy mathematics and hierarchical analysis, the paper has established comprehensive evaluation model of mining technology system selection, and put forward the approach to determine the mining parameters of combined mining technology systems, and the productivity matching principles and parameters of each single mining technology system in combined mining technology systems of surface coal mines. According to the analysis of production cost components in coal industry chain, this research designed economic experiments of coal industry chain transaction under different conditions of carbon discharge tax, established production cost transmission model in coal industry chain. Based on regression analysis of experimental data, this research has concludes that each link tends to transfer production cost to the downstream one in the whole coal industry chain. A link with higher profits appears more powerful in digesting production cost, which confirms there is a choice tendency of different levels in coal industry chain. Based on the theories of integrated organization, transaction cost, game and path dependence, this dissertation analyzed the formation process of coal industry chain paths under different low carbon economies, produced key notes in coal industry chain and identified five specific parameters in human, machine, materials, law and environment aspects, including key

  17. 基于数字矿床模型的露天境界动态优化%Dynamic optimization of Open-pit Mining Boundary Based on Digital Mineral Deposit Model

    Institute of Scientific and Technical Information of China (English)

    卢立松; 孟中华; 李志国

    2013-01-01

    The delineation of open-pit mining boundary is directly related to the benefits of mine.In order to make the determination of open-pit mining boundary scientific and easy,with three-dimensional digital mineral deposit model,combining with the NPV principle,using L-G graph theory method and taking full account of the reality of the discount rates,the prices of ore with different grades and the specific gravities of various rocks,by using block model attributes calculation,based on annual stripping amount obtained according to stripping schedule the net present value of block segment was calculated.Then taking the net present value as optimization objective,the evaluation of investment project was made to achieve the dynamic optimization of open-pit mining boundary.Taking an iron mine as example,the dynamic optimization of open-pit mining boundary was carried out,and the optimized result brought out a decrease of total stripping amount of 2.104 million cubic metres and average stripping ratio decreases from 2.25 to 1.52 comparing with the initial solution of open-pit mining boundary,so the was obvious.%露天矿山开采境界圈定的合理性与矿山效益直接相关,为科学、简便的得到最优露天开采境界,借助三维数字矿床模型,结合NPV原理,采用L-G图论法,充分考虑贴现率、矿石的不同品级售价及不同岩石类型比重等现实情况,利用块段模型属性运算,以采剥进度计划所得各块段采剥年度值,计算块段净现值,以净现值为优化目标,做出投资方案评价,实现露天开采境界动态最优化计算.以某铁矿为例进行了动态优化计算,最终优化结果相较境界初始解,采剥总量减少210.4万m3,平均剥采比由2.25减小到1.52,效果明显.

  18. Application of artificial neural network coupled with genetic algorithm and simulated annealing to solve groundwater inflow problem to an advancing open pit mine

    Science.gov (United States)

    Bahrami, Saeed; Doulati Ardejani, Faramarz; Baafi, Ernest

    2016-05-01

    In this study, hybrid models are designed to predict groundwater inflow to an advancing open pit mine and the hydraulic head (HH) in observation wells at different distances from the centre of the pit during its advance. Hybrid methods coupling artificial neural network (ANN) with genetic algorithm (GA) methods (ANN-GA), and simulated annealing (SA) methods (ANN-SA), were utilised. Ratios of depth of pit penetration in aquifer to aquifer thickness, pit bottom radius to its top radius, inverse of pit advance time and the HH in the observation wells to the distance of observation wells from the centre of the pit were used as inputs to the networks. To achieve the objective two hybrid models consisting of ANN-GA and ANN-SA with 4-5-3-1 arrangement were designed. In addition, by switching the last argument of the input layer with the argument of the output layer of two earlier models, two new models were developed to predict the HH in the observation wells for the period of the mining process. The accuracy and reliability of models are verified by field data, results of a numerical finite element model using SEEP/W, outputs of simple ANNs and some well-known analytical solutions. Predicted results obtained by the hybrid methods are closer to the field data compared to the outputs of analytical and simple ANN models. Results show that despite the use of fewer and simpler parameters by the hybrid models, the ANN-GA and to some extent the ANN-SA have the ability to compete with the numerical models.

  19. Geostatistical modeling of facies, bitumen grade and particle size distribution for the Joslyn oil sand open pit mine project

    Energy Technology Data Exchange (ETDEWEB)

    Babak, Olena; Insalaco, Enzo; Mittler, Andreas [Total EandP Canada Ltd. (Canada)

    2011-07-01

    The Joslyn North Mine Project is currently in the pre-development stage; the aim of this study is to use different available data to draw a geological model of facies, bitumen grade, full particle size distribution (PSD) and ore/waste discrimination. The study was conducted with the database of around 800 wells, stochastic, indicator and Gaussian simulations were performed along with a sensitivity study. Results demonstrated the importance of some parameters for evaluating grade cases including variogram uncertainty, sampling limitations and errors in geostatistical workflow. In addition, modeling the full PSD dataset was shown to be useful. This study demonstrated how to use available database through an overall workflow to develop case scenarios for bitumen in place in ore and characterize the ore material.

  20. [An occupational physiology study at the Asarel Mining and Milling Works--screening for risk factors of the cardiovascular system in workers in an open-pit mine].

    Science.gov (United States)

    Mincheva, L; Khadzhiolova, I

    1995-01-01

    It was the purpose of this study to define the frequency of occurrence of a number of individual and occupational factors contributing to development of arterial hypertension in "Asarel" MMW open-pit workers. The investigated subjects numbered 36 and ranged in age from 22 to 55 years (average, 36 +/- 1.9 years). The jobs represented included mainly: diggers, bulldozers, driver, drillers, blasters, road-service workers, electric and mechanic fitters. Endpoints measured and evaluated included: arterial blood pressure, pulse rate, biometric characteristics (age, occupational experience, body height and weight), common risk factors, such as family antecedents, cigarette smoking, alcohol consumption, level of physical activity at and off work, etc. For this sample of open-pit workers, findings indicated a relatively high incidence of hypertension (28% of subjects). The level of arterial hypertension consistently correlated with worker age, length of occupational experience, and body weight. There was high prevalence of cardiovascular risk factors: alcohol consumption, family history, cigarette smoking, use of salty foods, overweight. The observed changes in the cardiovascular system and high prevalence of risk factors point to the necessity of taking specific medical prevention measures. These have been taken into consideration in designing the overall program of upgrading work conditions and organization, as well as improving the style of life of "Asarel" MMW workers. PMID:8524751

  1. 辽宁海州露天矿边坡预应力锚索远程监测系统%Slope prestressed anchor cable remote monitoring system in Liaoning Haizhou open-pit mine

    Institute of Scientific and Technical Information of China (English)

    毛开江; 张宏伟; 韩军; 李胜

    2012-01-01

    With the closure of Haizhou open-pit mine, the rock mass structure is weakening and the supporting force of surrounding rock becoming smaller, the slope of Haizhou open-pit mine is unstable and has potential risks for large scale landslides. Based on the engineering geological condition, the slope shape, the steady-state and monitoring pur- pose of Haizhou open-pit mine, research and develop the slope prestressed anchor cable remote monitoring system in Liaoning Haizhou open-pit mine. The GPRS long range wireless transmission technology was used to remote initiative monitoring rock stress of slope for obtaining the characteristics of rock deformation and slip information, It can monitor the slope anchor cable stress all-weather and it is suitable for medium-and long-term slope monitoring as it power sup- plied by solar energy. According to the field application of the slope monitoring and the slope stability analysis in Haizhou open-pit mine, the system was proved to monitoring the slope stability in real time. It has important signifi- cance to control the slope landslide.%随着海州露天矿的闭坑,岩体结构越来越弱化,围岩的支承能力越来越小,露天矿边坡处于不稳定状态,具有发生大规模滑坡的潜在危险。根据海州露天矿工程地质条件,边坡形态,稳定状态及监测目的,研发海州露天矿边坡预应力锚索远程监测系统。系统应用GPRS远距离无线传输技术远程主动监测边坡岩体内部应力变化来获取岩体变形特征和滑移信息,实现边坡锚索应力全天候连续自动监测,其采用太阳能进行供电,适用于边坡中、长期监测。通过对海州露天矿边坡监测与边坡稳定性分析的现场应用实践证明,该系统可以对边坡稳态进行实时监测,对边坡滑坡灾害防治具有重要意义。

  2. Prediction of ground vibrations resulting from the blasting operations in an open-pit mine by adaptive neuro-fuzzy inference system

    Science.gov (United States)

    Iphar, Melih; Yavuz, Mahmut; Ak, Hakan

    2008-11-01

    The aim of this study is to predict the peak particle velocity (PPV) values from both presently constructed simple regression model and fuzzy-based model. For this purpose, vibrations induced by bench blasting operations were measured in an open-pit mine operated by the most important magnesite producing company (MAS) in Turkey. After gathering the ordered pairs of distance and PPV values, the site-specific parameters were determined using traditional regression method. Also, an attempt has been made to investigate the applicability of a relatively new soft computing method called as the adaptive neuro-fuzzy inference system (ANFIS) to predict PPV. To achieve this objective, data obtained from the blasting measurements were evaluated by constructing an ANFIS-based prediction model. The distance from the blasting site to the monitoring stations and the charge weight per delay were selected as the input parameters of the constructed model, the output parameter being the PPV. Valid for the site, the PPV prediction capability of the constructed ANFIS-based model has proved to be successful in terms of statistical performance indices such as variance account for (VAF), root mean square error (RMSE), standard error of estimation, and correlation between predicted and measured PPV values. Also, using these statistical performance indices, a prediction performance comparison has been made between the presently constructed ANFIS-based model and the classical regression-based prediction method, which has been widely used in the literature. Although the prediction performance of the regression-based model was high, the comparison has indicated that the proposed ANFIS-based model exhibited better prediction performance than the classical regression-based model.

  3. 露天矿智能配矿系统研发与应用%Research and Application of Intelligent Ore Matching System of Open-pit Mine

    Institute of Scientific and Technical Information of China (English)

    陈彦亭; 巩瑞杰; 南世卿; 宋爱东; 陈越

    2016-01-01

    In order ensure the stable ore quality,the ore-body morphological characteristics and grade distribution characteristics are shown by adopting three-dimensional modeling software,based on this,the quantitative predicting software of loss rate and dilution rate of open-pit mine is developed by an-alyzing the mining production techniques to provide the relatively accurate ore matching basic data.The ore matching process is analyzed in depth,the programming solver ore matching mathematical model un-der a number of constraint conditions is established.The intelligent ore matching software is developed by using VB and Matlab language to realize the functions of ore block orthogonal combination and program-ming solver and optimization to promote the development of quantitative and intelligentize ore matching work.The application results of the software show that the ore matching software developed in this paper has the characteristics of simple operation and practical function,it can make stable ore grade and make full of the low grade ore inside of mining boundary.Besides that,it also help to improve the ore compre-hensive utilization rate.On the whole,the effects of cost decreasing and benefit increasing are good.%为了保证入选矿石质量稳定,在利用三维建模软件表现矿体空间形态及品位分布的基础上,充分分析矿山采矿生产工艺,研发露天矿损失率、贫化率定量化预测软件,提供相对精确的配矿基础数据保障;深入分析配矿流程,建立诸多约束条件下的规划求解配矿数学模型,采用 VB与 Matlab 混合编程,开发智能优化配矿软件,实现矿块正交组合、规划求解优化等功能,使配矿工作定量化、智能化。应用结果表明:配矿软件操作简便、功能实用,进一步稳定入选品位,同时最大限度地利用了境界内的低品位矿,提高矿石综合利用率,降本增效效果显著。

  4. Coal Mines, Active - Longwall Mining Panels

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — Coal mining has occurred in Pennsylvania for over a century. A method of coal mining known as Longwall Mining has become more prevalent in recent decades. Longwall...

  5. REDUCTION OF SEISMIC EFFECTS FROM BLASTING IN OPEN PIT COAL-MINES BANOVIĆI

    OpenAIRE

    Josip Krsnik; Zvonimir Ester; Vladimir Štimac

    1989-01-01

    The ground motions of higher intensities are generated by deep-hole blasting of overburden. The most appropriate type of explosive as well as the optimum parameters of blasting was chosen. The minor part of the blasting energy is being transformed into the kinetic energy of seismic waves of smaller intensity (the paper is published in Croatian).

  6. 露天矿卡车调度系统关键技术研究%Analysis the Key Technologies of the Truck Dispatching System at Open- Pit Mines

    Institute of Scientific and Technical Information of China (English)

    董红娟

    2011-01-01

    Along with the raise of production, the increment of mining equipment size, and the improvement of automation and mechanization degree, the transporting cost accounts for more and more portion of the total cost of open - pit mine. Therefore ,it is important to optimize the truck dispatching and truck -shovel matching in order to accurately execute production plan, save cost, and increase production and economical benefit. The truck dispatching system at open - pit mines is an integrated system which inclodes GPS positioning technology, GPRS communication technology, GIS management technology, operational research and optimization theory. In this paper, the composition of open - pit mine truck dispatching system and the key technologies for design this system has been mainly studied and presented corresponding ways to solve it.%随着露天矿产量规模的不断扩大及设备大型化、机械化、自动化程度的不断提高,采运成本占矿山生产成本的比例也越来越高,优化车队运行、准确执行生产计划,以提高矿山产量,节约费用,取得较高经济效益显得尤为重要.露天矿卡车调度系统是集GPS定位技术、GPRS通信技术、GIS管理技术、运筹学以及优化理论于一身的综合系统.本文主要研究了该系统的构成以及设计该系统所需要的关键性技术问题,并提出了相应的解决方法.

  7. The Dynamic prediction of environment damage induced by the excavation from open-pit into underground mine%露天转地下开采诱发环境破坏的动态预测

    Institute of Scientific and Technical Information of China (English)

    贾太保

    2015-01-01

    In the process of mineral resources development , the mining of deep resource in the open-pit mine re-stricted by the stripping ratio factors should turn to underground mining .Open-pit mining is located in the under-ground mining influence domain .This causes part of the two mining influence domain overlapping , of the two types mining effect, thus, it constitutes a compound superposition effect , and makes the overlying rock mass deformation mechanism more complicated and the deformation spread widely .This paper takes a mining engineering practice in Beijing as the background , to study the Dynamic evolution law , the sliding mechanism and the definition of damage zone of the surface deformation in the process of the excavation from open-pit into underground mine under complex conditions of environmental engineering geology .It also summarizes the evolution characteristics of dynamic damage range and movement parameters in the mining process , thus provides a decision-making basis for the mine safety production and safety control .%在矿产资源开发过程中,露天开采转为地下开采后,露天边坡受地下采动影响,由于两种采动影响部分重叠,造成两种采动效应相互作用,构成复合叠加效应,使得上覆岩体变形机制更加复杂、变形波及范围广。以北京某矿的开采工程实际为背景,研究了复杂的环境工程地质条件下露天转地下开采过程中地表变形的动态演变规律、滑移机制和破坏区的界定等内容,并得出了其开采过程中的动态破坏范围及其移动参数的演变特点,从而为矿山安全生产和安全防控提供了决策依据。

  8. GIS-based 3D limit equilibrium analysis for design optimization of a 600 m high slope in an open pit mine

    Institute of Scientific and Technical Information of China (English)

    Meifeng Cai; Mowen Xie; Chunlei Li

    2007-01-01

    Combining the GIS (geographic information systems) grid-based data with four proposed column-based 3D slope stability analysis models,a comprehensive solution of a high-steep open-pit slope has been obtained.For six searching ranges,19 critical slip surfaces of different sizes have been studied,in which the minimum 3D safety factor is 1.33.Comparison of 3D safety factors of designed and proposed slope plans shows for all the critical slip surfaces for the proposed plan,the smallest 3D safety factor is 1.33 under the most unfavorable condition.This means that the proposed plan of the high slopes,about 600 m,of an open pit (2-5°steeper than designed plan) is feasible.

  9. Optimization Of Blasting Design Parameters On Open Pit Bench A Case Study Of Nchanga Open Pits

    OpenAIRE

    Victor Mwango Bowa

    2015-01-01

    Abstract In hard rock mining blasting is the most productive excavation technique applied to fragment insitu rock to the required size for efficient loading and crushing. In order to blast the insitu rock to the desired fragment size blast design parameter such as bench height hole diameter spacing burden hole length bottom charge specific charge and rock factor are considered. The research was carried out as a practical method on Nchanga Open Pits NOP ore Bench to optimize the blasting desig...

  10. Uncover of Brod-Gneotino coal mine and their importance for Bitola TP plant coal supply, v. 15(57)

    International Nuclear Information System (INIS)

    Development program of Electric Power Company of Macedonia includes to open several pits of coal with aim to prolongate the working period of TPP 'Bitola', of which one is bed 'Brod-Gneotino'. This coal bed is characterized with some characteristic mining and technological parameters described in this paper. Opening of this bad has a great influence on needed mining and technological conditions for parallel exploitation of open pit 'Suvodol' and CGS 'Suvodol'. (Author)

  11. Uncover of Brod-Gneotino coal mine and their importance for Bitola TP plant coal supply, v. 15(59)

    International Nuclear Information System (INIS)

    Development program of Electric Power Company of Macedonia includes to open several pits of coal with aim to prolongate the working period of TPP 'Bitola', of which one is bed 'Brod-Gneotino'. This coal bed is characterized with some characteristic mining and technological parameters described in this paper. Opening of this bad has a great influence on needed mining and technological conditions for parallel exploitation of open pit 'Suvodol' and CGS 'Suvodol'. (Author)

  12. Uncover of Brod-Gneotino coal mine and their importance for Bitola TP plant coal supply, v. 15(58)

    International Nuclear Information System (INIS)

    Development program of Electric Power Company of Macedonia includes to open several pits of coal with aim to prolongate the working period of TPP 'Bitola', of which one is bed 'Brod-Gneotino'. This coal bed is characterized with some characteristic mining and technological parameters described in this paper. Opening of this bad has a great influence on needed mining and technological conditions for parallel exploitation of open pit 'Suvodol' and CGS 'Suvodol'. (Author)

  13. Chile: producing coal at world's most southerly mine

    Energy Technology Data Exchange (ETDEWEB)

    Wyllie, R.J.M.

    1987-12-01

    The Pecket coalfield is part of a great coal bearing basin which is on the Brunswick Peninsula about 30km northeast of Punta Arenas, the capital of Magellanes province. Reserves of about 50 million mt are available for open-pit mining with potential for additional resources of similar magnitude some of which would have to be recovered by underground mining. The mine produces sub-bituminous coal for thermal use. The principal customer is a new coal-fired section of the Tocopilla electric power station of Codelco-Chile, the state copper company. The mine is a classic shovel and truck operation with no facilities for washing or cleaning the coal so it is extremely important that the coal is mined cleanly.

  14. Coal Mines, Abandoned - Digitized Mined Areas

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — Coal mining has occurred in Pennsylvania for over a century. The maps to these coal mines are stored at many various public and private locations (if they still...

  15. Open-pit Mine Bench Blasting Design and the Application based on Three-dimensional Model%基于三维模型的露天矿台阶爆破设计及其应用

    Institute of Scientific and Technical Information of China (English)

    段玉贤; 李发本

    2011-01-01

    Based on three-dimensional orebody modeling technology,the blast-hole distributing and blasting network design of open-pit mine bench blasting was studied.Which had been successfully used in blasting project design at 1414 northern bench of Sandaozhuang Open-pit Mine of Luoyang Luanchuan Molybdenum Industry Group Co,Ltd.The result indicated that the blasting design system blasting plan is scientific and effective,and the blasting design working efficiency has been improved greatly.%基于三维矿体建模技术,针对露天矿台阶爆破的布孔和爆破网络设计展开研究,并在洛钼集团三道庄露天矿1414台阶北部的爆破工程设计中成功应用。实践表明,该爆破设计系统爆破方案科学有效,大大提高了爆破设计工作效率。

  16. 露天地下协同采矿充填方法%An Approach of Open-pit and Underground Cooperative Mining and Filling

    Institute of Scientific and Technical Information of China (English)

    任凤玉; 张东杰; 李海英; 宋德林

    2015-01-01

    analyzed to reveal the characteristics that the surrounding rocks slide or chip mainly along the weak structural plane,and accordingly safety filling measures that the filling waste cooperative emissions along the collapse pit axial and radial is put forward to prevent side wall slipping;In addition,the large structural parameters sublevel caving is adopted for underground to increase mining intensity and balance the decline rate of granular in collapse pit,which forms the open-pit and underground cooperative mining and filling methods. It is proved by theoretical analysis and industrial experiments that the method above can enhance production efficien-cy and improve the working environment largely,and create an environmental protection and high efficient mining approach for the steep iron deposits with low-grade parallel belt.

  17. Coal Mines Security System

    Directory of Open Access Journals (Sweden)

    Ankita Guhe

    2012-05-01

    Full Text Available Geological circumstances of mine seem to be extremely complicated and there are many hidden troubles. Coal is wrongly lifted by the musclemen from coal stocks, coal washeries, coal transfer and loading points and also in the transport routes by malfunctioning the weighing of trucks. CIL —Coal India Ltd is under the control of mafia and a large number of irregularities can be contributed to coal mafia. An Intelligent Coal Mine Security System using data acquisition method utilizes sensor, automatic detection, communication and microcontroller technologies, to realize the operational parameters of the mining area. The data acquisition terminal take the PIC 16F877A chip integrated circuit as a core for sensing the data, which carries on the communication through the RS232 interface with the main control machine, which has realized the intelligent monitoring. Data management system uses EEPROM chip as a Black box to store data permanently and also use CCTV camera for recording internal situation. The system implements the real-time monitoring and displaying for data undermine, query, deletion and maintenance of history data, graphic statistic, report printing, expert diagnosis and decision-making support. The Research, development and Promote Application will provide the safeguard regarding the mine pit control in accuracy, real-time capacity and has high reliability.

  18. Optimized Implementation of Open-pit Mine Production Scheduling System Based on Multi-agent Technology%基于Multi-agent技术的露天矿山生产调度系统的优化实现

    Institute of Scientific and Technical Information of China (English)

    霍晓宇; 杨仕教

    2013-01-01

    For the dynamic changes and complex nonlinear of open-pit mine production scheduling system,the multi-agent technology was introduced to carry out optimized models.In the model,the system was divided into 5 single-agents:Task-agent,Production Scheduling agent,Blasting-agent,Transport-agent and Crushing-agent.The demand for mine's ore was given in Task-agent.Adaptive neuro-fuzzy inference system (ANFIS) and genetic algorithm (GA) was used to make modeling on Blasting-agent.According to crushing capacity and crushing demand,Transport-agent was constrained by Crushing-agent.Transport-agent was optimized by introducing adaptive mutation process to improve particle swarm optimization (PSO).Production scheduling agent was used to coordinate and handle thecontradiction of ore demand and production capability,and it utilized MATLAB to simulate models.An open-pit mine production scheduling system was based on a open-pit mine,the results of modeling optimization showed that the method was feasible.%针对动态变化、复杂非线性的露天矿山生产调度系统引入多智能体技术进行建模优化,将系统分为任务Agent、生产调度Agent、爆破Agent、运输Agent以及破碎Agent五个单智能体.在任务Agent中给出矿山的矿石需求量,运用自适应神经模糊推理系统(ANFIS)和遗传算法(GA)对爆破Agent进行建模优化;破碎Agent根据破碎能力以及破碎需求量对运输Agent进行约束,引入自适应变异程序改进粒子群算法(PSO)对运输Agent进行优化;生产调度Agent协调处理矿石需求量与各生产工艺Agent生产能力之间的矛盾,运用MATLAB软件对模型进行模拟实现.以某露天矿山为例构建露天矿山生产调度系统,建模优化结果表明该方法可行.

  19. Monitoring of surface deformation in open pit mine using DInSAR time-series: a case study in the N5W iron mine (Carajás, Brazil) using TerraSAR-X data

    Science.gov (United States)

    Mura, José C.; Paradella, Waldir R.; Gama, Fabio F.; Santos, Athos R.; Galo, Mauricio; Camargo, Paulo O.; Silva, Arnaldo Q.; Silva, Guilherme G.

    2014-10-01

    We present an investigation of surface deformation using Differential SAR Interferometry (DInSAR) time-series carried out in an active open pit iron mine, the N5W, located in the Carajás Mineral Province (Brazilian Amazon region), using 33 TerraSAR-X (TSX-1) scenes. This mine has presented a historical of instability and surface monitoring measurements over sectors of the mine (pit walls) have been done based on ground based radar. Two complementary approaches were used: the standard DInSAR configuration, as an early warning of the slope instability conditions, and the DInSAR timeseries analysis. In order to decrease the topographic phase error a high resolution DEM was generated based on a stereo GeoEye-1 pair. Despite the fact that a DinSAR contains atmospheric and topographic phase artifacts and noise, it was possible to detect deformation in some interferometric pairs, covering pit benches, road ramps and waste piles. The timeseries analysis was performed using the 31 interferometric pairs, which were selected based on the highest mean coherence of a stack of 107 interferograms, presenting less phase unwrapping errors. The time-series deformation was retrieved by the Least-Squares (LS) solution using an extension of the Singular Value Decomposition (SVD), with a set of additional weighted constrain on the acceleration deformation. The atmospheric phase artifacts were filtered in the space-time domain and the DEM height errors were estimated based on the normal baseline diversity. The DInSAR time-series investigation showed good results for monitoring surface displacement in the N5W mine located in a tropical rainforest environment, providing very useful information about the ground movement for alarm, planning and risk assessment.

  20. Coal mine site reclamation

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2013-02-15

    Coal mine sites can have significant effects on local environments. In addition to the physical disruption of land forms and ecosystems, mining can also leave behind a legacy of secondary detrimental effects due to leaching of acid and trace elements from discarded materials. This report looks at the remediation of both deep mine and opencast mine sites, covering reclamation methods, back-filling issues, drainage and restoration. Examples of national variations in the applicable legislation and in the definition of rehabilitation are compared. Ultimately, mine site rehabilitation should return sites to conditions where land forms, soils, hydrology, and flora and fauna are self-sustaining and compatible with surrounding land uses. Case studies are given to show what can be achieved and how some landscapes can actually be improved as a result of mining activity.

  1. Ecological Footprint and Ecological Costs in Open-Pit Metal Mining%金属矿床露天开采的生态足迹和生态成本

    Institute of Scientific and Technical Information of China (English)

    王青; 胥孝川; 顾晓薇; 刘剑平; 王晓旭

    2012-01-01

    footprint method,direct and indirect ecological footprint models have been developed to reflect the ecological pressure of open-pit metal mining.The former measures the direct damages of open-pit mining to the ecosystem,and the latter the indirect impact of CO2 emission from energy consumption on the ecosystem.Based on the ecological footprints and the major eco-service functions of the ecosystem,the ecological costs of open-pit mining are estimated,including lost value of direct eco-services,lost value of indirect eco-services,reclamation costs,and the eco-cost of energy consumption.The present values of ecological costs and profits were estimated based on the ultimate pit and mining schedule designed for a real open-pit mine.Results show that the total present value of ecological costs is 78% of the present value of profits,and the sum of the lost value of indirect eco-services and eco-cost of energy consumption,for which the mine operator is not responsible,is 33% of the present value of profits.It can be seen that,if mine operators were forced by the government to be responsible for all the ecological costs,the returns on investment in open-pit mines would be sharply lowered and many deposits with relatively unfavorable reserve conditions would not be exploited resulting in better resources protection.

  2. Experimental Analysis of Open-pit Slope Rock Mass Parameters in Miaogou Iron Mine%庙沟铁矿露天边坡岩体参数试验分析

    Institute of Scientific and Technical Information of China (English)

    张子祥; 许雁超; 杨天鸿; 李海洲

    2011-01-01

    In view of low rock strength and poor stability condition of open-pit slope in Miaogou iron mine, and based on systematical field investigation on engineering-geological condition, hydro-geological condition, rock mass structure, physical and mechanical properties of rock mall of the open-pit slope, the back analysis of rock mass parameters was made by applying the Geo-slope to determine the proper mechanical parameters index of rock mass, with the combination of the numerical simulation and the limit equilibrium method of the principle of the modern rock mechanics, and with rock mass parameters obtained. The study provides a basis for ensuring reasonability and reliability of the slope expansion in the mine.%针对庙沟铁矿露天采场边坡岩体强度低、稳定性差的特点,在系统的现场工程地质、水文地质、岩体结构与岩性分布调查和矿岩物理力学性质试验基础上,结合符合现代岩石力学原理的数值模拟和极限平衡相结合的方法,依据所得岩体力学参数,应用Geo-slope进行岩体参数反演分析,确定了符合实际的边坡岩体力学参数指标,为保证该矿加陡扩帮分析的合理性和可靠性分析提供了依据.

  3. Coal mining in Ramagundam

    Energy Technology Data Exchange (ETDEWEB)

    Chakraberty, S.

    1979-07-01

    The Ramagundam area in the South Godavari Coalfield is one of the most promising coal-bearing belts in India. It contains total coal reserves of about 1,132,000,000 tons in an area of approximately 150 square kilometers, and holds high potential for development into a vast industrial center. During the past four years production has doubled to 3,500,000 tons in 1978 to 1979. By 1983 to 1984, the total output per year is planned to be doubled again. Increased mechanization and the introduction of more advanced mining techniques will help to achieve this goal. In addition to the present face machinery, i.e., gathering arm loaders/shuttle cars and side dump loaders/chain conveyor combinations, the latest Voest-Alpine AM50 tunneling and roadheading machines have been commissioned for development work. Load-haul-dump machines will be introduced in the near future to ensure higher loading/transport capacities. A double-drum shearer loader with self-advancing supports is due to be commissioned shortly for faster, more efficient longwall mining to supplement conventional bord and pillar mining. In addition, a mechanized open cast mine has come on stream, and a walking dragline will soon be delivered to the mine for removing overburden. The projected annual output from this mine will be about 2,000,000 tons. (LTN)

  4. Study of Mine Geologic Environmental Control and Ecologic Restoration Plans During Transfer from Open Pit to Underground Mine%露天转地下矿山地质环境治理与生态恢复规划研究

    Institute of Scientific and Technical Information of China (English)

    南世卿; 李东生

    2009-01-01

    Taking for example mining of Shirengou Iron Mine during transfer from open pit to underground mine, the mine's geologic status was discussed. According to the characteristics of the mining during transfer from open pit to underground mine, the mine geologic environmental and ecologic restoration plans were raised. It effectively protected mine environment and restored ecology of mining area. It achieved better effects in ensuring underground safe mining and had a demonstration effect for similar mines.%以石人沟铁矿露天转地下开采为例,论述了其矿山地质现状,根据露天转地下开采的特点,提出了矿山地质环境与生态恢复的规划,既做到矿山环境有效保护、矿区生态得到恢复,又达到保障地下开采安全的良好效果,为类似矿山起到示范作用.

  5. 双利铁矿2号露天采场扩帮后西半帮边坡稳定性分析%Analysis of west slope stability after the expansion of No.2 open-pit mine in Shuangli Iron Mine

    Institute of Scientific and Technical Information of China (English)

    黄堃; 张飞; 刘永利; 马跃; 安振华

    2014-01-01

    Keeping the slope stability is important in the operation of open-pit mining.In order to determine the fi-nal open-pit slope angle in No.2 open-pit mine in Shuangli Iron Mine after the expansion,the stress distribution and displacement distribution,elastic and plastic zone distribution are analyzed by FLAC3D and the safety coefficient of the slope calculated by finite element strength reduction.Reasonable slope angle is determined and a reference basis is provided for late slope monitoring.%保持边坡稳定是露天矿生产经营的一项重要内容。为确定双利铁矿2号露天采场扩帮后的最终边坡角,通过运用FLAC3D软件建模分析边坡的应力分布、位移移动趋势、弹塑性区分布以及有限元强度折减法计算边坡的安全系数,从而确定合理的边坡角,并为后期边坡的监测提供参考依据。

  6. Research on Transport System Risk Factors of Open-pit Mine Based on W-R-SHEL%基于W-R-SHEL的露天矿山运输系统风险因素研究

    Institute of Scientific and Technical Information of China (English)

    姜立春; 任晓会

    2011-01-01

    Personnel, machinery, environment, management and other aspects are related with Open-pit mine transport system accident. According to the fact that Open-pit mine transport system is complex and has high accident rate, human factors are chosen as the focus of risk factors analysis, a new risk factors I-dentification model is proposed based on the combination of WBS and R-SHEL model. With this model, risk factors of a large domestic aluminum mine' 8 transport system were identified, five first-level indexes, thirteen second-level indexes, forty third-level indexes were determined, risk factors'comprehensive evaluation was achieved by using three -scale IAHP and fuzzy mathematics, the comprehensive evaluation results are consistent with the practical situation.%露天矿山运输系统事故原因涉及人、机、环、管等多个环节.基于运输系统复杂、高事故率这一实际情况,以人为因素作为风险因素的分析中心,在总结传统人为风险因素辨识模型存在不足的基础上,提出基于工作分解结构(WBS)与R-SHEL相结合的风险因素辨识模型.将模型具体应用在国内某大型铝土矿山运输系统风险因素研究中,确定5个一级因素指标、13个二级因素指标及40个三级因素指标,采用三级标度IAHP与模糊(fuzzy)相结合的方法实现指标体系中风险因素的综合评判,得出综合评判结果与现场实际情况基本相符.

  7. 露天矿设备调度图表绘制及设备时间利用率分析系统%Computer-based Open-pit Mine Equipment Dispatching Diagram and Time Utilization Ratio Analysis

    Institute of Scientific and Technical Information of China (English)

    孙效玉; 涂鸿渐; 诸子轩; 王硕

    2016-01-01

    Many problems exit in manual dispatching diagram,such as waste of time and manpower,low efficiency and lack of error correction methods.The system functions and a new failure-handling business process were determined by taking standardization,modularization,smartness,visualization as the targets.And then,technology solutions of database,graph draw-ing,fault index statistics and visualization were designed.Based on visual C#2013 integrated development platform and SQL Server 2008 database,a computer-based equipment dispatching diagram and management system in open-pit mine was devel-oped.The system showed strong expansibility and practicability,and it achieved visualization of the dispatching diagram.It also improved the capability and the accuracy of the real-time statistical information harvesting.Tests were conducted in Fushun west open-pit mine,with the satisfied result achieved.%针对人工绘制露天矿设备调度图表存在的费时费力、效率低、缺乏纠错手段等问题,以规范化、模块化、智能化、可视化为目标,确定了系统功能和新的故障处理业务流程,设计了数据库、图表绘制、故障指标统计与可视化展示等技术方案,并以Visual C#2013为集成开发平台、以SQL Server 2008为后台数据库,开发了扩展性和实用性较强的露天矿设备调度图表绘制与管理系统,实现了调度图表的智能可视化,提高了统计信息的实时性和准确性。经抚顺西露天矿数据检验,取得了较为满意的效果。

  8. Coal Mine Methane in Russia

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-07-01

    This paper discusses coal mine methane emissions (CMM) in the Russian Federation and the potential for their productive utilisation. It highlights specific opportunities for cost-effective reductions of CMM from oil and natural gas facilities, coal mines and landfills, with the aim of improving knowledge about effective policy approaches.

  9. Land reclamation in the lignite open pit mining industry of Central and Eastern Europe - a comparative discourse; Rekultivierung im Braunkohlenbergbau Mittel- und Osteuropas - eine vergleichende Betrachtung

    Energy Technology Data Exchange (ETDEWEB)

    Drebenstedt, C. [TU Bergakademie, Freiberg (Germany)

    2003-03-01

    This comparative discourse on land reclamation in the Central and East European lignite mining regions is based on a complex analysis of the prevailing natural, geological, technological and social conditions. Considering the above conditions, the reclaimed land in the mined-out lignite mines of Central and Eastern Europe will predominantly be used as forests, although farming is also possible under particularly suitable conditions. Some of the land is given over to recreational purposes and integrated into the relevant landscape. Large lakes in residual holes of former lignite mines have only been created in Germany so far, where the special requirements of nature preservation have also been given attention. As regards the planning and financing regulations and the regulations coordinating the use of the post-mining land, there are differences between the individual countries which must be attributed to the rather diverse legal conditions. In general, the tasks associated with recultivation are defined similarly, are based on scientific investigations and are implemented at a very high level. The exchange of experience should be continued also in the future. (orig.)

  10. Software development for geologic information management system on open-pit production

    Energy Technology Data Exchange (ETDEWEB)

    Li, K.; Tian, A.; Ren, Z.; Pang, Y. [China University of Mining and Technomogy, Xuzhou (China). College of Mineral and Energy Resources

    2001-09-01

    A software, including geological data gathering and processing, deposit modelling, reserves calculating and mine map plotting, for geologic information management of open-pit production was developed. Based on the interactive technique, CAD, the object-oriented simulation, and the characteristics of geologic structures, all the geologic information databases and geologic mapping sub-systems have been established for open-pit production, planning and management. 6 refs., 1 fig.

  11. Feasibility research on composite artificial boundary crown pillars in the transfer from open-pit to underground mining%露天转地下开采复合型人工境界顶柱可行性研究

    Institute of Scientific and Technical Information of China (English)

    毛肖杰; 陈玉明; 吴爱梅

    2015-01-01

    针对传统露天转地下开采过程中留设的天然境界矿柱回采率低、损失大的缺点,在参考国内外相关文献的基础上,通过相关的技术经济比较和 FLAC3D 数值模拟分析,讨论了一种主要以钢筋混凝土为结构的人工境界顶柱代替天然境界矿柱作为境界顶柱的经济性和安全性。可行性研究结论可为类似工程设计时参考。%Natural boundary crown pillars set in the conventional transfer from open-pit to underground mining lead to low extraction rate and high ore loss.To solve the problem,the paper refers to related literature home and a-broad,compares technical indicators,conducts numerical simulation by FLA3D,and discusses the economy and safety of using artificial boundary crown pillars structured mainly by steel and concrete instead of natural crown pillars as boundary crown pillars.The feasibility research conclusion can be referred to in the design of similar projects.

  12. Mining lore : Bankhead, mining for coal

    Energy Technology Data Exchange (ETDEWEB)

    Nichiporuk, A.

    2007-09-15

    Bankhead, Alberta was one of the first communities to be established because of mining. It was founded in 1903 by the Canadian Pacific Railway (CPR) on Cascade Mountain in the Bow River Valley of Banff National Park. In 1904, Mine No. 80 was opened by the Pacific Coal Company to fuel CPR's steam engines. In order to avoid flooding the mine, the decision was made to mine up the steep seams instead of down. The mine entered full production in 1905. This article described the working conditions and pay scale for the mine workers, noting that there was not much in terms of safety equipment. There were many accidents and 15 men lost their lives at the mine. During the mine's 20-year operation, miners went on strike 6 times. The last strike marked the closure of the mine in June 1922 and the end of industry in national parks. CPR was ordered to clear out and move the mining equipment as well as the houses, buildings and essentially the entire town. During its peak production, Mine No. 80 produced about a half million tons of coal. 1 ref., 1 fig.

  13. Application of Dynamic Property Management of GIS in Open-pit Mine Truck Dispatching%GIS动态属性管理在露天矿卡车调度中的应用

    Institute of Scientific and Technical Information of China (English)

    张维国; 孙效玉; 王彦彬

    2012-01-01

    Open-pit mine truck dispatching system combines the advantages of Global Positioning System (GPS) and Geographic Information System (GIS) ,and GIS information is mainly related to topography,road network,the key points, etc. The characteristics of the information are quickly changed by production, need to pass to and share by the mobile terminal wireless network, and require the simple functions. There is a systematic classification of GIS information about dispatching system for efficiency and quality to meet the system requirements and put forward the method of mine GIS dynamic property management according to the different categories to simplify the use of different means.%露天矿卡车调度系统结合了全球定位系统(GPS)和地理信息系统(GIS)的优势,其中GIS信息主要涉及地形地貌、道路网、关键点等,这些信息具有随生产变化快、需要无线网络传递给移动终端共享、功能要求简单等特点.为满足系统工作效率和质量要求,对调度系统涉及的GIS信息进行了系统分类,根据类别的不同采用不同的简化手段,并提出了矿山GIS动态属性管理的方法.

  14. Affecting Factor Analysis and Control Technique of Open-pit Slope Stability in Sijiaying Iron Mine%研山铁矿边坡稳定性影响因素分析及控制技术

    Institute of Scientific and Technical Information of China (English)

    张树东

    2015-01-01

    The stability of open pit slope is the key factor affecting the mine production security. Based on the results of field investigation,it shows that slope lithology,water,and mining disturbance are the main three factors affecting the stability of Mine. The slope is divided to three areas by comprehensively considering the slope stability of rock and earth mass and the re-inforcement measures of whole-length bonding bolt,anchor wire technology,steel mesh+spray anchor net are taken to strengthen the slope stability. Based on the actual situation of the slope,some treatment measures are taken,such as full-length grouted bolt,pre-stressed cable,hanging shotcrete. Based on the pre-blasting technology theory,the pre-blasting parameter of the Yans-han Iron Mine was designed and brought into the field operations. The results show that the parameters greatly reduced blasting vibration and damage to the slope step,and then significantly improve the slope stability. The research lays a good foundation for the safety production of the mine.%露天边坡的稳定是决定矿山安全生产的关键因素。基于研山铁矿边坡工程地质特征现场调查结果,得出边坡岩性、水以及开采扰动是影响矿区边坡稳定性的三大主要因素。综合考虑边坡岩土体破碎情况将边坡自西向东划分为3个分区,根据各区边坡实际状况,分别采用了全长黏结锚杆支护、预应力锚索、挂网喷射混凝土等防护治理措施。基于预裂爆破技术原理,对研山铁矿进行了预裂爆破参数设计及现场试验,结果表明,设计的爆破参数不仅大幅度降低了爆破震动,减小了对台阶损伤破坏,极大地增强了边坡的稳定性,为矿山安全生产奠定了基础。

  15. Implementation of Paste Backfill Mining Technology in Chinese Coal Mines

    Directory of Open Access Journals (Sweden)

    Qingliang Chang

    2014-01-01

    Full Text Available Implementation of clean mining technology at coal mines is crucial to protect the environment and maintain balance among energy resources, consumption, and ecology. After reviewing present coal clean mining technology, we introduce the technology principles and technological process of paste backfill mining in coal mines and discuss the components and features of backfill materials, the constitution of the backfill system, and the backfill process. Specific implementation of this technology and its application are analyzed for paste backfill mining in Daizhuang Coal Mine; a practical implementation shows that paste backfill mining can improve the safety and excavation rate of coal mining, which can effectively resolve surface subsidence problems caused by underground mining activities, by utilizing solid waste such as coal gangues as a resource. Therefore, paste backfill mining is an effective clean coal mining technology, which has widespread application.

  16. Coal mining - custodian or culprit

    Energy Technology Data Exchange (ETDEWEB)

    Russell, C.

    1991-01-01

    Coal mining is a mainstay of the South African economy. Coal is used as a primary fuel, in the metallurgical and manufacturing sectors and is a considerable earner of foreign exchange. However coal mining has the potential to damage and disrupt the natural environment. The article, the second in a series on the mining industry and the environment, reports on whether South Africa's coal mining industry is playing its part in preserving the environment. Topics covered include: legislation, surface pollution i.e. rehabilitating open-cast mines and waste dumps, and surface subsidence; water pollution i.e. preventing, increase in water acidity; atmospheric pollution i.e. minimising the effects of coal dust, preventing methane contamination and minimising the effects of spontaneous combustion. Details are given of the nature of each problem and solutions adopted. The Chamber of Mines and its members have a history of self-regulation and proactive involvement in environmental management in the mining industry. Each year the industry spends more than 50 million rand on environmental rehabilitation and also funds research on more efficient and effective ways for the industry and the environment to co-exist. 8 photos.

  17. Towards the Development of a Low Cost Airborne Sensing System to Monitor Dust Particles after Blasting at Open-Pit Mine Sites

    Directory of Open Access Journals (Sweden)

    Miguel Alvarado

    2015-08-01

    Full Text Available Blasting is an integral part of large-scale open cut mining that often occurs in close proximity to population centers and often results in the emission of particulate material and gases potentially hazardous to health. Current air quality monitoring methods rely on limited numbers of fixed sampling locations to validate a complex fluid environment and collect sufficient data to confirm model effectiveness. This paper describes the development of a methodology to address the need of a more precise approach that is capable of characterizing blasting plumes in near-real time. The integration of the system required the modification and integration of an opto-electrical dust sensor, SHARP GP2Y10, into a small fixed-wing and multi-rotor copter, resulting in the collection of data streamed during flight. The paper also describes the calibration of the optical sensor with an industry grade dust-monitoring device, Dusttrak 8520, demonstrating a high correlation between them, with correlation coefficients (R2 greater than 0.9. The laboratory and field tests demonstrate the feasibility of coupling the sensor with the UAVs. However, further work must be done in the areas of sensor selection and calibration as well as flight planning.

  18. Towards the Development of a Low Cost Airborne Sensing System to Monitor Dust Particles after Blasting at Open-Pit Mine Sites.

    Science.gov (United States)

    Alvarado, Miguel; Gonzalez, Felipe; Fletcher, Andrew; Doshi, Ashray

    2015-01-01

    Blasting is an integral part of large-scale open cut mining that often occurs in close proximity to population centers and often results in the emission of particulate material and gases potentially hazardous to health. Current air quality monitoring methods rely on limited numbers of fixed sampling locations to validate a complex fluid environment and collect sufficient data to confirm model effectiveness. This paper describes the development of a methodology to address the need of a more precise approach that is capable of characterizing blasting plumes in near-real time. The integration of the system required the modification and integration of an opto-electrical dust sensor, SHARP GP2Y10, into a small fixed-wing and multi-rotor copter, resulting in the collection of data streamed during flight. The paper also describes the calibration of the optical sensor with an industry grade dust-monitoring device, Dusttrak 8520, demonstrating a high correlation between them, with correlation coefficients (R(2)) greater than 0.9. The laboratory and field tests demonstrate the feasibility of coupling the sensor with the UAVs. However, further work must be done in the areas of sensor selection and calibration as well as flight planning. PMID:26274959

  19. Coal Mining-Related Respiratory Diseases

    Science.gov (United States)

    ... ray Surveillance Program (CWXSP) Frequently Asked Questions Coal Miner Health Surveillance Coal Mining-Related Respiratory Diseases CWHSP Data Query System CWHSP Public Data Digital Imaging Activity ...

  20. Optimization Of Blasting Design Parameters On Open Pit Bench A Case Study Of Nchanga Open Pits

    Directory of Open Access Journals (Sweden)

    Victor Mwango Bowa

    2015-08-01

    Full Text Available Abstract In hard rock mining blasting is the most productive excavation technique applied to fragment insitu rock to the required size for efficient loading and crushing. In order to blast the insitu rock to the desired fragment size blast design parameter such as bench height hole diameter spacing burden hole length bottom charge specific charge and rock factor are considered. The research was carried out as a practical method on Nchanga Open Pits NOP ore Bench to optimize the blasting design parameters that can yield the required fragmentation size thereby reducing the shovel loading times and maximizing efficiency of the subsequent mining unit operations such as hauling and crushing. Fragmentation characteristics such as the mean fragment size were measured by means of a digital measuring tape and predicated using the Kuznetsov equation and rock factor value of ore bench was calculated using Lilly 1986 equations by means of rock characteristics. Traditional blasting design parameters were acquired for NOP and modified using Langerfors and Sharma P.A approaches. Several blast operations were conducted using both traditional and modified blasting design parameters on the same ore bench with the same geological conditions. Loading times of the shovel and fragment sizes were obtained after the blasts from ore bench where both the traditional and modified blasting design parameters were applied. Results show that mean fragment size and loading times were reduced from 51cm and 12minutes to 22cm and 3minutes where traditional and modified blasting design parameters were applied respectively.

  1. Patrones de sucesión vegetal sobre los depósitos de material residual en minas de gravas - Santa Fe de Bogotá Plant succession patterns on residual open-pit gravel mines deposits Bogota

    Directory of Open Access Journals (Sweden)

    Mora Goyes Ricardo A.

    1999-11-01

    , textura, pH, cBased on both: the study of composition and structure of plant communities and the analysis of the physico-chemical characteristics of mining wastes, the initial patterns of primary succession were determined. These patterns were present in three deposits of waste material abandoned during 18, 36 and 120 months respectively. Sue materials were originated in open-pit gravel mines located to the south of Bogota (Colombia. This study pretends to contribute to the knowledge of the meehanlsms of natural restauration of tropical ecosystems subjected to man-borne degradation.

  2. 基于DTM离散模型的露天矿测量验收方法%Measurement Acceptance Method Based on DTM Discrete Model in Open-pit Mine

    Institute of Scientific and Technical Information of China (English)

    李娜; 邵必林; 李角群; 吕康亭

    2015-01-01

    There are many disadvantages in conventional method,such as slow operating speed,poor stability and big er-ror. According to these disadvantages,taking the Panjiantian iron mine as the research example,the DTM( digital terrain mod-el) discrete model which lies between the discrete model and three dimensional solid model is established. Compared with the corresponding three dimensional solid model from the aspects of calculation accuracy,calculation speed,stability and visual dis-play,the analysis results show that compared with the three dimensional solid model,the calculation error of the DTM discrete model is less than 1. 00%and the calculation speed is also improved one order of magnitude. It is very stable and the accuracy can meet the requirements of accuracy;Besides that,the discretization error of the DTM discrete model is lower than the block model. The above analysis results further show that the DTM discrete model is worth being used as the effective method of ore-bearing rock measurement acceptance in open-pit mining,and also has some reference for the related calculation work of civil engineering and highway.%针对传统测量验收方法运算速度慢、稳定性差及离散误差大等问题,以四川潘家田铁矿为例,提出了一种介于完全离散模型及三维连续模型的DTM( Digital terrain model)离散模型。从计算精度、速度、稳定性及直观显示等方面与相应的三维实体模型进行对比分析,结果表明:与三维实体模型相比, DTM 离散模型的计算误差小于1.00%,运算速度快1个数量级,计算稳定且精度满足准确性要求;与块体模型相比,DTM离散模型的离散误差较小。上述分析结果进一步表明,DTM离散模型可以作为露天矿生产中矿岩量测量验收的有效方法,并且可推广应用于土建及公路的相关生产计算中。

  3. 黑沟露天矿逐孔爆破降震技术的应用%Appl ication of Hole by Hole Blasting Vibart ion Reduction Technology in Heigou Open-pit Mine

    Institute of Scientific and Technical Information of China (English)

    杨云虎

    2016-01-01

    露天矿山爆破单孔装药量较大,随着人们对爆破震动危害的重视,爆破降震技术的研究已成为矿山生产的重要课题。文章针对镜铁山矿黑沟露天矿爆破距2#溜井近、爆破规模大、爆破对溜井震动影响大的问题,开展了逐孔爆破降震技术研究,通过爆破计算及试验,详细合理地设计了2#溜井附近台阶爆破方案。爆破结果表明,采用逐孔爆破降震技术在降低爆破震动、保护溜井工程设施的安全稳定方面具有良好应用效果,这是一种简便、易行、可靠、经济的降震方法。%Abstratc:In open pit mine, the explosive charge of single hole is large,With the people to the attention of blasting vibra-tion damage, blasting seismic reduction technology research has become an important project of the mine production.For the short distance near 2#chute, large scale blasting and the problem of blasting effect on chute shock, this paper conduc-ted hole by hole blasting vibration technology.Through the calculation and the test of blasting, it designed detailed and rea-sonable bench blasting scheme nearby 2# chute.The blasting results show that the hole by hole technology to reduce the blasting vibration, to ensure the safety of the chute engineering facilities stability has a good application effect.This is a simple, easy ,reliable and economic method of vibration reduction.

  4. Economic Limit of Coal Mining Closedown in Restructuring Coal Industry

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    One of the key points in restructuring the coal industry is to close some deficient coal mines which haveneither economic result nor social benefit. Based on the relationship among production, cost, and profit, differenteconomic limits for closing coal mines in different cases were put forward. The relationship between the profit andclosedown cost of deficient coal mines was analyzed and an overall economic limit for closing a deficient coal minewas also proposed.

  5. Strategic Management of Coal Mining Industry Efficiency

    OpenAIRE

    Olga Tkacheva; Anna Batashova; Irina Zhukova; Anna Smakhtina; Liudmila Topchienko

    2015-01-01

    The purpose of this study is to develop recommendations for the coal mining industry efficiency strategic management. The authors developed a mathematical economic models to maximize the net present value of the index of companies in the composition of the coal mining industry and calculated the efficiency of Russian enterprises in the composition of the coal mining industry in Russia in 2013 using MathCad. The authors identified the main problems of coal mines and in the quality of their sol...

  6. Implementation of Paste Backfill Mining Technology in Chinese Coal Mines

    OpenAIRE

    Qingliang Chang; Jianhang Chen; Huaqiang Zhou; Jianbiao Bai

    2014-01-01

    Implementation of clean mining technology at coal mines is crucial to protect the environment and maintain balance among energy resources, consumption, and ecology. After reviewing present coal clean mining technology, we introduce the technology principles and technological process of paste backfill mining in coal mines and discuss the components and features of backfill materials, the constitution of the backfill system, and the backfill process. Specific implementation of this technology a...

  7. RTRO–Coal: Real-Time Resource-Reconciliation and Optimization for Exploitation of Coal Deposits

    NARCIS (Netherlands)

    Benndorf, J.; Yueksel, C.; Soleymani, M.; Rosenberg, H.; Thielemann, T.; Mittmann, R.; Lohsträter, O.M.; Lindig, M.; Minnecker, C.; Donner, R.; Naworyta, W.

    2015-01-01

    This contribution presents an innovative and integrated framework for real-time-process reconciliation and optimization (RTRO) in large continuous open pit coal mines. RTRO-Coal is currently developed, validated, tested and implemented as part of a multi-national multi-partner European Union funded

  8. Research on Cost-effective Distance of Automobile Transport in Open-pit Mines%矿山汽车运输经济合理运距研究

    Institute of Scientific and Technical Information of China (English)

    母传伟; 王先锋; 杨维菁; 亢建民

    2015-01-01

    结合国内外露天矿山设计和生产实践,研究确定汽车经济合理运距的方法并提出汽车经济合理运距的建议指标。通过计算确定影响汽车经济合理运距的主要技术参数基建投资、经营费、投资效果系数。在讨论汽车经济合理运距时,综合考虑资金的时间价值,把基建投资和经营费的计算看作动态过程。根据不同运距的基建投资及经营费用,采用公式分别计算铁路运输和汽车运输单位矿岩费用。据计算结果绘出汽车运输和铁路运输成本关系图,通过关系图找到铁路和汽车2种运输方式的经济合理界限点(汽车运输运距在1.85 km)。得出结论:汽车经济合理运距不是定值,而是随运输条件不同而变化;汽车经济合理运距随运量的增大而降低,随露天矿的开采深度增加而加大,随汽车车型加大而增大,还跟矿山类型密切相关。%Based on design and production practice of open-pit mines at home and abroad,cost-effective distance of auto-mobile transport was determined,and index for cost-effective distance was put forward. The main technical parameters that af-fect the distance were determined by calculating:infrastructure investment,operating costs,investment effect coefficient. Time value of capital should be considered comprehensively,calculation of capital investment and business expense should be regar-ded as dynamic process when discussing transport distance of automobile. According to the infrastructure investment and opera-tion cost,cost per ton of motor transport and railway transport were calculated separately under the condition of different dis-tance. Cost diagram of motor transport and railway transport was drawn according to the calculation results. Through the dia-gram,the boundary point on the cost-effective distance of two kinds of modes of transportation was found ( The cost-effective distance of automobile transport was 1. 85 km). The

  9. Considerations for modeling small-particulate impacts from surface coal-mining operations based on wind-tunnel simulations

    Energy Technology Data Exchange (ETDEWEB)

    Perry, S.G.; Petersen, W.B. [Air Resources Lab., Research Triangle Park, NC (United States); Thompson, R.S. [Atmospheric Research and Exposure Assessment Lab., Research Triangle Park, NC (United States)

    1994-12-31

    The Clean Air Act Amendments of 1990 provide for a reexamination of the current Environmental Protection Agency`s (USEPA) methods for modeling fugitive particulate (PM10) from open-pit, surface coal mines. The Industrial Source Complex Model (ISCST2) is specifically named as the method that needs further study. Title II, Part B, Section 234 of the Amendments states that {open_quotes}...the Administrator shall analyze the accuracy of such model and emission factors and make revisions as may be necessary to eliminate any significant over-predictions of air quality effect of fugitive particulate emissions from such sources.{close_quotes}

  10. Coal mining needs a differentiating approach

    Energy Technology Data Exchange (ETDEWEB)

    Stoyanov, S.

    1988-03-01

    Describes state of Bulgarian coal mines in 1988 after the introduction of self-management in place of a strictly centralized economic control system in the mining and power generating industries, which are interdependent as thermal power plants consume 90% of Bulgarian coal. It is said that fulfillment of general branch plans, prepared in consultation with state financial experts, should be the first priority of all coal mines and power plants. The second priority is to improve profitability, despite low coal prices and low coal quality. It is suggested that the operating costs of a mine operating in average conditions, plus a few percent for self-financing and development, should determine the price of coal, and that prices should remain fixed for several years. Future investment in mining should come from state-owned industrial enterprises and from the state. Future investment approach should concentrate on constructing modern, highly mechanized coal mines with good mining conditions.

  11. 30 CFR 49.20 - Requirements for all coal mines.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Requirements for all coal mines. 49.20 Section... TRAINING MINE RESCUE TEAMS Mine Rescue Teams for Underground Coal Mines § 49.20 Requirements for all coal mines. (a) The operator of each underground coal mine shall make available two certified mine...

  12. First Mexican coal mine recovery after mine fire, Esmeralda Mine

    Energy Technology Data Exchange (ETDEWEB)

    Santillan, M.A. [Minerales Monclova, SA de CV, Palau Coahuila (Mexico)

    2005-07-01

    The fire started on 8 May 1998 in the development section from methane released into the mine through a roof-bolt hole. The flames spread quickly as the coal was ignited. After eight hours the Safety Department decided to seal the vertical ventilation shafts and the slopes. The quality of coal in the Esmeralda Mine is very high quality, and Minerales Monclova (MIMOSA) decided to recover the facilities. However, the Esmeralda Mine coals have a very high gas content of 12 m{sup 3}/t. During the next 2.5 months, MIMOSA staff and specialists observed and analysed the gas behaviour supported by a chromatograph. With the results of the observations and analyses, MIMOSA in consultation with the specialists developed a recovery plan based on flooding the area in which fire might have propagated and in which rekindling was highly probable. At the same time MIMOSA trained rescue teams. By 20 August 1998, the mine command centre had re-opened the slopes seal. Using a 'Step-by-Step' system, the rescue team began the recovery process by employing cross-cuts and using an auxiliary fan to establish the ventilation circuit. The MIMOSA team advanced into the mine as far as allowed by the water level and was able to recover the main fan. The official mine recovery date was 30 November 1998. Esmeralda Mine was back in operation in December 1998. 1 ref., 3 figs.

  13. Increasing the service life of cross ties at open pits

    Energy Technology Data Exchange (ETDEWEB)

    Tikhomirov, A.I.

    1981-01-01

    An analysis shows that the service life of cross ties on mobile tracks should be at least 6 years; on permanent ones, 11-12 years. Cross tie failure at open pits is greatly affected by frequent relaying of tracks during mining work, the significant dynamic and static loads when the rail lengths separate (up to 80-100 kN/length in the summer and 150-160 kN in the winter), instability of the soil foundation, movement of the cross ties when the gage is expanded, weakening of joints, etc. Improving their service life is affected by the ballast quality, heavier rail types, separate bolt and wood screw attachments, elastic liners between the tie plate and cross tie, and autoclave impregnation of the cross ties with oil antiseptics. Repair of old cross ties is an indispensable condition for extending their service life. At open pits, cross tie repair should be done at track repair and assembly stations with standard MPS cross tie repair shop equipment.

  14. Impact of Coal Mining on Environment

    OpenAIRE

    Sribas Goswami

    2015-01-01

    Coal mining adversely affects the eco-system as a whole. On the unstable earth, the unresting mankind constantly uses a variety of resources for daily lives. Coal is recognized to have been the main source of energy in India for many decades and contributes to nearly 27 % of the world’s commercial energy requirement. Coal is mainly mined using two methods- surface or ‘opencast’ and underground mining. The geological condition determines the method of mining. Coal mining is usually associated ...

  15. Organic petrology of Paleocene Marcelina Formation coals, Paso Diablo mine, western Venezuela: Tectonic controls on coal type

    Science.gov (United States)

    Hackley, P.C.; Martinez, M.

    2007-01-01

    About 7??Mt of high volatile bituminous coal are produced annually from the four coal zones of the Upper Paleocene Marcelina Formation at the Paso Diablo open-pit mine of western Venezuela. As part of an ongoing coal quality study, we have characterized twenty-two coal channel samples from the mine using organic petrology techniques. Samples also were analyzed for proximate-ultimate parameters, forms of sulfur, free swelling index, ash fusion temperatures, and calorific value. Six of the samples represent incremental benches across the 12-13??m thick No. 4 bed, the stratigraphically lowest mined coal, which is also mined at the 10??km distant Mina Norte open-pit. Organic content of the No. 4 bed indicates an upward increase of woody vegetation and/or greater preservation of organic material throughout the life of the original mire(s). An upward increase in telovitrinite and corresponding decrease in detrovitrinite and inertinite illustrate this trend. In contrast, stratigraphically higher coal groups generally exhibit a 'dulling upward' trend. The generally high inertinite content, and low ash yield and sulfur content, suggest that the Paso Diablo coals were deposited in rain-fed raised mires, protected from clastic input and subjected to frequent oxidation and/or moisture stress. However, the two thinnest coal beds (both 0.7??m thick) are each characterized by lower inertinite and higher telovitrinite content relative to the rest of Paso Diablo coal beds, indicative of less well-established raised mire environments prior to drowning. Foreland basin Paleocene coals of western Venezuela, including the Paso Diablo deposit and time-correlative coal deposits of the Ta??chira and Me??rida Andes, are characterized by high inertinite and consistently lower ash and sulfur relative to Eocene and younger coals of the area. We interpret these age-delimited coal quality characteristics to be due to water availability as a function of the tectonic control of subsidence rate. It

  16. Coal Mines, Abandoned - COAL_MINE_ENTRIES_IN: Underground Coal Mine Entrances in Indiana (Indiana Geological Survey, 1:24,000, Point Shapefile)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — SW_COAL_ENTRY, the predecessor of COAL_MINE_ENTRIES_IN, is a point- based ESRI ArcView shapefile that shows the locations of underground coal mine entrances in the...

  17. Coal Mines, Abandoned - COAL_MINE_UNDERGROUND_IN: Underground Coal Mines in Indiana (Indiana Geological Survey, 1:24,000, Polygon Shapefile)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — COAL_UND, the predecessor of COAL_MINE_UNDERGROUND_IN, is a polygon-based ESRI ArcView shapefile that shows the location and extent of underground coal mines in the...

  18. Obed Mountain Coal railcar loading automation

    Energy Technology Data Exchange (ETDEWEB)

    Templeton, J.C. [Hinz Consulting Ltd., Calgary, AB (Canada)

    1996-12-31

    Coal from Obed Mountain Coal`s open pit mine near Hinton, Alberta is carried 11 km. by conveyor from the plant to the train loadout facility. The loadout facility is equipped with an upgraded computer system. The bin weighing system and the train car scale are connected directly to the loadout computer. The operator has complete information to collect, enter, and access information and to produce manifest and summary reports, in addition to controlling the loadout facility. 7 figs.

  19. 76 FR 63238 - Proximity Detection Systems for Continuous Mining Machines in Underground Coal Mines

    Science.gov (United States)

    2011-10-12

    ... Proximity Detection Systems for Continuous Mining Machines in Underground Coal Mines, published on August 31... Mining Machines in Underground Coal Mines AGENCY: Mine Safety and Health Administration, Labor. ACTION... Mining Machines in Underground Coal Mines. Due to requests from the public and to provide...

  20. 特大型露天矿全寿命开拓系统及远距离废石筑坝工艺研究%The Research of Very Large Open-pit Mine Whole-life Development System and Long-distance Waste Rock Damming Technology

    Institute of Scientific and Technical Information of China (English)

    米子军; 周育

    2014-01-01

    袁家村铁矿在山坡露天矿时期,建成半移动破碎站-胶带运输系统,并将破碎站布置在采场内,用于减少汽车运距和缩短基建时间。采用废石筑坝,解决尾矿粒度过细不能筑坝的难题。%Yuan Jiacun mine during the period of the hillside open pit,builted the semi-portable crusher station-belt conveyor system,and the crushing station is seted in the stope,to reduce car haul and shorten the construction time.Using waste rock dam,solve the problem of fairly granular tailings can�t damming.

  1. Impact of Coal Mining on Environment

    Directory of Open Access Journals (Sweden)

    Sribas Goswami

    2015-03-01

    Full Text Available Coal mining adversely affects the eco-system as a whole. On the unstable earth, the unresting mankind constantly uses a variety of resources for daily lives. Coal is recognized to have been the main source of energy in India for many decades and contributes to nearly 27 % of the world’s commercial energy requirement. Coal is mainly mined using two methods- surface or ‘opencast’ and underground mining. The geological condition determines the method of mining. Coal mining is usually associated with the degradation of natural resources and the destruction of habitat. This causes invasive species to occupy the area, thus posing a threat to biodiversity. Huge quantities of waste material are produced by several mining activities in the coal mining region. If proper care is not taken for waste disposal, mining will degrade the surrounding environment. The method of waste disposal affects land, water and air and in turns the quality of life of the people in the adjacent areas. This paper throws lights on the burning issues of coal mines and its impact on the environment.

  2. 基于毫米波雷达的露天矿卡车防追尾自动刹车系统研究%Research on anti-rear auto brake system of trucks based on millimeter wave radar in Open-pit Mine

    Institute of Scientific and Technical Information of China (English)

    王有仓

    2016-01-01

    This article expounds the principle of signal receiving and transmitting base on technology of millimeter wave radar, introduces the composition of radar collision prevention system and auto brake function for open-pit mine truck. Through the industrial experiment and analysis of mine site, the mine provides the safe distance determination criterion under different road conditions for trucks. The mine applies the millimeter wave radar technology to the mine production practice and provides advanced technical means and methods for safety production.%阐述了毫米波雷达技术的信号收发原理,介绍了露天矿卡车雷达防追尾系统的组成与自动刹车功能。通过矿山现场的工业实验和分析,为卡车提供了在不同道路条件下的安全距离确定准则,将毫米波雷达技术应用到矿山生产实践,为安全生产提供了先进的技术手段和方法。

  3. Acid mine drainage: mining and water pollution issues in British Columbia

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-12-31

    The importance of protecting water quality and some of the problems associated with mineral development are described. Negative impacts of mining operations such as sedimentation, water disturbances, and water pollution from waste rock and tailings are considered. Mining wastes, types of water pollution from mining, the legacy of acid mine drainage, predicting acid mine drainage, preventing and mitigating acid mine drainage, examples from the past, and cyanide heap-leaching are discussed. The real costs of mining at the Telkwa open pit coal mine are assessed. British Columbia mines that are known for or are potentially acid generating are shown on a map. 32 refs., 10 figs.

  4. Injury experience in coal mining, 1989

    Energy Technology Data Exchange (ETDEWEB)

    1990-01-01

    This Mine and Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1989. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 46 tabs.

  5. Injury experience in coal mining, 1990

    Energy Technology Data Exchange (ETDEWEB)

    None

    1991-01-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1990. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report.

  6. Injury experience in coal mining, 1992

    Energy Technology Data Exchange (ETDEWEB)

    Reich, R.B.; Hugler, E.C.

    1994-05-01

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1992. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report.

  7. Injury experience in coal mining, 1991

    Energy Technology Data Exchange (ETDEWEB)

    1991-12-31

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1991. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. Data used in compiling this report were reported by operators of coal mines and preparation plants on a mandatory basis as required under the Federal Mine Safety and Health Act of 1977, Public Law 91-173,as amended by Public Law 95-164. Since January 1, 1978, operators of mines or preparation plants or both which are subject to the Act have been required under 30 CFR, Part 50, to submit reports of injuries, occupational illnesses, and related data.

  8. International opportunities to reduce coal mine methane

    International Nuclear Information System (INIS)

    This paper discusses opportunities to increase the recovery and use of methane from coal mines throughout the world. It presents information on resource estimates in Poland, Czechoslovakia, Russia, Ukraine and the People's Republic of China and discusses coalbed methane's role in helping these countries meet their energy and environmental goals. Existing barrier to expanded methane recovery and utilization at coal mines and some possible activities to overcome these barriers are also discussed

  9. Mining adjacent inclined coal seams of varying thickness

    Energy Technology Data Exchange (ETDEWEB)

    Batmanov, Yu.K.; Bakhtin, A.F.; Bulavka, E.I.

    1980-01-01

    In the Donbass coal basin a large number of thin coal seams located near other thicker coal seams are left. It is suggested that coal output from the Donbass could be increased by 100% and cost of mining could be lowered by 0.4-1.1 roubles per 1 ton of coal if thinner coal seams were also mined. Mining methods in the Donbass are analyzed from the point of view of reducing the cost of mining and increasing coal production. Recommendations on methods of mining thin inclined coal seams are given. (6 refs.) (In Russian)

  10. 国产地基合成孔径雷达监测预警系统在紫金山金铜矿露天采场边坡位移监测的应用%Application of domestic ground based synthetic aperture radar monitoring and warning system in slope displacement monitoring on open pit of Zijinshan gold/copper mine

    Institute of Scientific and Technical Information of China (English)

    赵东寅; 申其鸿; 马海涛; 杨晓琳

    2015-01-01

    The Zijinshan gold/copper mine belongs to Zijin Mining Group Co., Ltd., and its open pit will be the biggest open mine slope in Asia.An innovative technique for the remote assessment of small surface movement mo-nitoring, based on differential interferometry and Ground-Based Synthetic Aperture Radar( GB-SAR) , has been de-veloped in recent years, which has some advantages comparing with other methods like GPS and full-station to cover large surface areas for two dimensional monitoring day and night under almost any weather condition.In this paper, the first application of domestic GB-SAR slope monitoring and warning system in Zijinshan Gold/Copper mine open pit was introduced .The advantages of applying GB-SAR on deformation monitoring, such as reliability, ef-fective-ness and high accuracy were validated.%紫金山金铜矿是福建紫金矿业集团股份有限公司下属的一个矿山基地,其露天采场将是全亚洲第一高露天矿山边坡。基于目前矿山采用的全站仪、GPS等监测技术,易受粉尘、降雨、光照、云雾等影响,无法实现大范围边坡区域实时、自动监测。而地基合成孔径雷达差分干涉测量技术则可以克服上述缺陷,该技术是滑坡监测技术未来的发展趋势,对于灾害预报及防治具有重要意义。介绍了国产地基合成孔径雷达边坡位移监测预警系统在紫金山金铜矿露采边坡的首次应用,验证了地基合成孔径雷达系统用于形变监测的可靠性、有效性及高精度等优势。

  11. Informationization of coal enterprises and digital mine

    Institute of Scientific and Technical Information of China (English)

    LU Jian-jun; WANG Xiao-lu; MA Li; ZHAO An-xin

    2008-01-01

    Analyzed the main problems which were found in current conditions and prob-lems of informationization in coal enterprises. It clarified how to achieve informationizationin coal mine and put forward a general configuration of informationization construction inwhich informationization in coal enterprises was divided into two parts: informationizationof safety production and informationization of management. Planned a platform of inte-grated management of informationization in coal enterprises. Ultimately, it has broughtforward that an overall integrated digital mine is the way to achieve the goal of informa-tionization in coal enterprises, which can promote the application of automation, digitaliza-tion, networking, informaitionization to intellectualization. At the same time, the competi-tiveness of enterprises can be improved entirely, and new type of coal industry can besupported by information technology.

  12. GRAPHICS DATA STRUCTURES IN MICROCOMPUTER AIDED DESIGN FOR OPEN PIT PLANNING

    Institute of Scientific and Technical Information of China (English)

    吴力心

    1991-01-01

    This paper discribes the importance and necessity of the study on the data structures for displaying the mining field using the interactive technology in open pit design and planning,based upon the grid block model. The commonly used data structures--rectangular array structure and quadtree structure ,are analyzed. Two compressed data structures--compressed circular link array structure and compressed doubly-linked circular array structure,are proposed,which are much more suitable for displaying the regularly gridded block model. When the two compressed data structures are adopted,the storage space can be tremendously saved and the algorithms are simple,while the requirements of the accuracy and the manipulating speed will be both satisfied for the interactive open pit short range plan formulation.

  13. Development and testing of methods for in-situ-monitoring the environmental problems in areas of abandoned open-pit lignite mines. Final report; Entwicklung und Erprobung von Methoden zur In-situ-Langzeitueberwachung fuer Probleme der Folgelandschaften des Braunkohlenbergbaus. Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Knoedel, K.; Koenig, F.

    1999-06-15

    In the project a concept and prototypes have been developed and tested for an automatic, computer-based monitoring of sites suspected to be hazardous in areas of abandoned open-pit lignite mines. In-situ measurements with milieuparameter probes and an optical sensor system in observation wells are combined with measurements between the wells using an electromagnetic system. Methods are being developed for monitoring the vadose and saturated zones. The areas of abandoned open-pit lignite mines in eastern Germany are not in a steady-state condition. Considerable changes are occurring due to redistribution and aeration of the sediments during removal of the overburden, due to disposal of solid and liquid wastes in the mine area, as well as to the re-establishment of normal groundwater levels. Monitoring will help to better understand the system. Precautionary and remedial measures must also be monitored as well as natural attenuation of pollutants. The results of the project are encouraging with regard to the range of the electromagnetic monitoring system as well as with regard to the long-term stability. Hence, the efficiency will be tested at a reference object in a long time test. (orig.) [German] Im Vorhaben sind ein Konzept und Prototypen fuer die vollautomatische, rechnergestuetzte Langzeitueberwachung (Monitoring) von Altlastenstandorten in den Braunkohlenbergbaufolgelandschaften entwickelt und getestet worden. Das Konzept basiert auf der Kombination lokaler Messungen mit Milieuparametersonden und einem System zur optischen Spektrometrie mit raeumlichen Ueberwachungsmethoden eines elektromagnetischen Ueberwachungssystems. Dabei wurden Loesungen sowohl fuer ein Monitoring in der wassergesaettigten als auch in der ungesaettigten Zone entwickelt. Derartige Ueberwachungssysteme werden kuenftig benoetigt, um zu einem besseren Verstaendnis und zur Loesung der Probleme in den Braunkohlenbergbaufolgelandschaften zu kommen, die durch die Belueftung und Umstrukturierung

  14. Prevention of explosion in coal mine and management of coal mine gas

    Institute of Scientific and Technical Information of China (English)

    FURUKAWA Hirofumi; LI Bingrui; TOMITA Shinji

    2009-01-01

    There are many problems in terms of safe coal production and the sound de-velopment of the coal industry. Accompanying the intensification and increasing efficiency of coal production and the conducting of mining operations at deeper and more remote areas of mines, the efficient recovery and utilization of Coal Mine Methane (CMM) is an important issue in improving and stabilizing the productivity in the coal mining industry with high levels of gas, where the incidence of gas outbursts is increasing. We plan to study various aspects of the development of production technology and characteristics of the mine site. This is to establish the technology for highly efficient coproduction coal and gas operation rate. As a result, the productivity at the coal mine face will increase due to the reduction in gas emissions in the mining face. Effective use of recovered gas can be ex-pected to reduce global warming by reducing the amount of coal mine methane gas emis-sion in the air.

  15. Evaluating the risk of coal bursts in underground coal mines

    Institute of Scientific and Technical Information of China (English)

    Mark Christopher⇑; Gauna Michael

    2016-01-01

    Coal bursts involve the sudden, violent ejection of coal or rock into the mine workings. They are almost always accompanied by a loud noise, like an explosion, and ground vibration. Bursts are a particular haz-ard for miners because they typically occur without warning. Despite decades of research, the sources and mechanics of these events are not well understood, and therefore they are difficult to predict and control. Experience has shown, however, that certain geologic and mining factors are associated with an increased likelihood of a coal burst. A coal burst risk assessment consists of evaluating the degree to which these risk factors are present, and then identifying appropriate control measures to mitigate the hazard. This paper summarizes the U.S. and international experience with coal bursts, and describes the known risk factors in detail. It includes a framework that can be used to guide the risk assessment process.

  16. Mining vertical coal seams in France

    Energy Technology Data Exchange (ETDEWEB)

    Schneiderman, S.J.

    1981-05-01

    French coal miners in the Lorraine Basin coalfields of Charbonnages de France, work under extremely difficult mining conditions. The coal seams are located in two parallel anticlines dipping to the southwest. On the northwest flanks the coal dips at angles up to 40/sup 0/; on the southeast flanks the coal dips as steep as 90/sup 0/. In addition to the problems associated with steeply dipping coal seams, the coal is often more than 3 meters (10 feet) thick, thus contributing the additional problems that are associated with thick seams. A cut-and-fill mining method is used and production of up to 400 tons per day for a three-shift working face has been achieved. The cut-and-fill mining method employed at Puit Reumaux, rising horizontal rooms with hydraulic stowing, is used in areas of the mine where seam dips exceed 45/sup 0/ and where seam thickness is from 2 to 5 meters (6.5 to 16.5 feet). Hydraulic stowing has many advantages for the Merlebach mine: The coalis located under urbanized areas and is also covered by water-bearing strata with hydraulic sand stowing there is little subsidence, so disturbances to the surface and the aquiferous zones are minimized. Hydraulic sand stowing also helps prevent eating and combustion.

  17. Coal mines around Accrington and Blackburn

    Energy Technology Data Exchange (ETDEWEB)

    Nadin, J.

    1999-12-01

    A companion to an earlier book on 'The coal-mines of East Lancashire', this volume covers coal mining in the townships of Church, Accrington, Oswaldthistle, Baxenden, Blackburn and Lower and Over Darmen, which are to the west. After a short history of the mining companies George Hargreaves & Co., and Simpson & Young, the book gives short historical accounts of all known coalmines, arranged in alphabetical order. It gives copious accounts of accidents and injuries in the pits, to both men and young children. The text and plates give an interesting insight into an area where coal mining goes back at least to the 15th century. Large scale extraction began at the turn of the 19th century. Many articles are reproduced from the local newspapers. An index of personnel names mentioned is included. 19 refs., 30 figs., 23 plates.

  18. Coal Mining Spoil Heap Management as urban solid waste dump; Utilizacion de Escombreras de Carbon como Vertedero Controlado de Residuos Solidos Urbanos

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    In the coordinated project DISPOSAL OF SOLID RESIDUES FROM COAL it is included the project Coal Mining Spoil Heap Management as Urban Solid Waste Dump. The main target of this project consisted of determining the viability of using coal mining spoil heaps, as controlled dubbish dump of urban solid wastes. The working plan to achieve this objective was composed of the following stages: 1. Urban solid wastes characterization. 2. Methodology to be followed for the selection of coal mining spoil heaps as controlled dump of urban solid wastes. 2.1 Classification and preliminary assessment of the possibility of using spoil heaps as urban solid waste dumps (APT/NON APT). 2.2 Realization of geological, geotechnical, hydrogeological and environmental studies applied to the spoil heaps classified as APT. 2.3 Analysis of the compatibility of the mining activity with the urban solid wastes dumped on the spoil heap. 2.4 Analysis of the use of coal mining wastes in the rubbish dump operative life. 3. Extraction of conclusions. The works were focused in the Leon province. As result of the researches we obtained the following results and conclusions: In the areas studied, only two emplacements are optima to dump urban solid wastes; spoil heap n. 13. Roguera Mine (Cinera-Matallana) and the open pit mine n. 4, Las Chaviadas, in Villablino. The active spoil heap use as controlled rubbish dump can cause, if not managed adequately, several coperating and occupational problems to the mine and to the company that manages the urban solid wastes. The abandoned spoil heap utilisation is difficult due to the problems that would arise when conditioning the site to be use as rubbish dump. The use of abandoned open pit mines, as controlled rubbish dump is feasible if geological, geotechnical, hydrogeological and environmental studies support it. It's possible the use of the coal mining wastes in the different operatives phases of the controlled rubbish dump. The evaluation methodology

  19. 78 FR 58567 - Criteria to Certify Coal Mine Rescue Teams

    Science.gov (United States)

    2013-09-24

    ... Safety and Health Administration Criteria to Certify Coal Mine Rescue Teams AGENCY: Mine Safety and... mine rescue team training. MSHA prescribes training materials through the issuance of instruction guides. Existing standards for coal mine rescue teams include criteria for mine operators to certify...

  20. 30 CFR 49.30 - Requirements for small coal mines.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Requirements for small coal mines. 49.30 Section 49.30 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR EDUCATION AND TRAINING MINE RESCUE TEAMS Mine Rescue Teams for Underground Coal Mines § 49.30 Requirements for small...

  1. 30 CFR 49.40 - Requirements for large coal mines.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Requirements for large coal mines. 49.40 Section 49.40 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR EDUCATION AND TRAINING MINE RESCUE TEAMS Mine Rescue Teams for Underground Coal Mines § 49.40 Requirements for large...

  2. Disaster prediction of coal mine gas based on data mining

    Institute of Scientific and Technical Information of China (English)

    SHAO Liang-shan; FU Gui-xiang

    2008-01-01

    The technique of data mining was provided to predict gas disaster in view of thecharacteristics of coal mine gas disaster and feature knowledge based on gas disaster.The rough set theory was used to establish data mining model of gas disaster prediction,and rough set attributes relations was discussed in prediction model of gas disaster tosupplement the shortages of rough intensive reduction method by using information en-tropy criteria. The effectiveness and practicality of data mining technology in the predictionof gas disaster is confirmed through practical application.

  3. Coal mining and water quality: Criciuma's case

    International Nuclear Information System (INIS)

    The coal mining in the Santa Catarina Coal-Basin started in 1885 and since them it has been causing serious damage to the environment, specially the water resources, causing several problems like sedimentation and acidification of the rivers that supply the region, and compromising the agricultural-industry and fishery. The mining is also responsible for several professional diseases. The region was considered, in 1980, the '14th Critical Area' to the Pollution Control and Environmental Quality Conservation. Only in the beginning of the 80's, after the publication of the 917 Interministerial Resolution (July, 1982), the first official actions were taken, in order to minimize the environmental impact due to the coal mining industry. With that scenario, the region was chosen as one of the study areas of the 'National Center of Control of Mining Pollution', derived from an agreement between the Departamento Nacional de Producao Mineral - DNPM and the Japan International Cooperation Agency (JICA). The present study is part of the set of studies that have been realized in the region, with the aim of evaluating the environmental impact caused by the coal mining industry, and to suggest actions (to the miners) in order to minimize the environmental problems. This study presents a review of the occupation process of the Criciuma region, its connection to the coal industry, the progress of the mineral and environmental legislation, and the periodic monitoring of environmental parameters (physic-chemical analysis of the Mae Luzia and Sangao rivers, and the drainage from two coal mines) during the period of three years. This period began before the setting of environmental restrictions, going up to after the adoption of reclamation actions. The results allow to conclude that, during the period studied, there was no improvement in the river water characteristics, despite the adoption of reclamation actions. This behaviour may be due to the following factors: there are several

  4. Environmental protection in brown coal mining with the example of the Belchatow brown coal surface mine

    Energy Technology Data Exchange (ETDEWEB)

    Wasowicz, J.

    1986-01-01

    Discusses environmental policy of Poland with the example of the Belchatow brown coal surface mine, the largest in Poland. The following problems are evaluated: collecting detailed information on water conditions in the Belchatow mine and environmental pollution prior to mine construction, construction of a pipeline system for water supply prior to mine draining, effects of mine draining on formation of a large drawdown cone, effects of lowering the ground water table on vegetation, forests, agriculture in the area, water conditions, river flow, water pollution from the Belchatow mine, water treatment plants, dust emission from Belchatow cuts and spoil banks, land reclamation after surface mining (plant growth, grass, afforestation), standardized methods for land reclamation, economic aspects of environmental protection, organizational models of environmental protection in a large brown coal surface mine.

  5. 露天煤矿油库环境风险评价%Risk assessment of oil depot environment in open-pit coal mine

    Institute of Scientific and Technical Information of China (English)

    付佳

    2015-01-01

    通过对国家环境保护法律法规及技术政策的分析,将露天煤矿油库作为露天煤矿建设项目环境风险评价重点环境风险评价单元.收集多方材料和实际案例后,进一步探讨露天煤矿的环境风险评价内容,提出有针对性的环境风险防范措施和应急预案.

  6. Development of a new methodology of cost estimation and investment in the coal opencast mining sector in Spain. Desarrollo de una neuva metodologia de estimacion de costes e inversiones en el sector de la mineria a cielo abierto de carbon en Espana

    Energy Technology Data Exchange (ETDEWEB)

    Orche Garcia, E.

    1992-01-01

    A double methodology of costs evaluation and investments is shown for open pit coal exploitations mined by drilling and blasting and/or ripping and annual productions between 0.5 and 8 millions m[sup 3] of waste and up to 700,000 tb of coal operated with conventional machines. The costs methodology has been made starting from 31 data of Spanish projects and exploitations. The investment methodology was made essentially on the basis of theoretical assumptions. The reckoned costs and investment have an accuracy of [+-]20%. The methodology of costs evaluation provides the total final cost of the ton of saleable coal. 35 figs., 86 tabs.

  7. Stability Assessment and Optimization Design of Lakeside Open-Pit Slope considering Fluid-Solid Coupling Effect

    Directory of Open Access Journals (Sweden)

    Wenchen Fan

    2015-01-01

    Full Text Available Chengmenshan copper mine, located at Jiujiang city in the Jiangxi Province, is a rarely lakeside open-pit mine in China. Since the open-pit is very close to Sai Lake, the seasonally changed water level and the distance between lake and slope have great influence to the stability of open-pit slope. Based on the drill data and geological sections, a numerical model of the slope is built. With the fluid-mechanical interaction associated, the stability of the slopes is numerically analyzed, in which different lake water levels and lake-slope distances are taken into consideration. The comparative analysis shows that a larger lake-slope distance can promise better slope stability and weaken the sensitivity of slope stability to water. The stability of slopes with different heights is analyzed to find that the stability weakens and the sensitivity is enhanced with the height increasing. To the most serious situation, the slope height and the lake water level being 238 m and 17.2 m, respectively, the Fs value equals 1.18945 which is extremely closed to the allowable safety factor of 1.20 for slope design. According to the minimum Fs for slope design, the minimum distance between lake and open-pit slope is found to be 60 m.

  8. The Role of Coal Mine Regulation in Regional Development

    OpenAIRE

    Xu, Hangtian; NAKAJIMA Kentaro

    2013-01-01

    In response to the high mortality rates and low productivity in coal mining, China began regulating coal mines in the 1990s, which has reshaped its coal economy. We empirically investigate the relationship between coal mine regulation and economic growth in China. Using two difference-in-difference approaches to compare the pre- and post-regulation periods, as well as regions with and without rich coal endowment, we find that regulation positively affects regional economy. This result is furt...

  9. Analysis and Research of Factors Affecting Coal Mining with Plough

    Institute of Scientific and Technical Information of China (English)

    刘过兵; 陈胜利

    2002-01-01

    Coal mining with ploughs is an ideal coal mining technology for thin a nd thinner coal seams. The existence conditions of coal seams are different for each other, which affects coal mining with ploughs to different degrees, and the application results are also different. The authors analyze the affecting factors by means of mathematical methods. The research is useful to the wide appli cation of ploughs.

  10. Mining induced seismicity in the Ruhr coal mining district, Germany

    Science.gov (United States)

    Fischer, Kasper D.; Wehling-Benatelli, Sebastian; Erstling, Stefanie; Brüstle, Andrea; Wlecklik, Dennis

    2013-04-01

    In 2012 four hard coal mines (at about 1000 m depth) were operating in Germany, three of them are in the Ruhr coal mining district. The mining method used (longwall mining in combination with caving) causes induced earthquakes due to the stress redistribution in the surrounding rock. Seismic events of magnitude 1.2 and larger are generally perceived by the population and thus trigger a wide interest. The Ruhr-University of Bochum routinely monitors the seismicity and its temporal evolution and energy release since the 1980s. The current seismological network consists of 14 stations (broad-band and short-period seismometers) in the Ruhr area. Six stations are located at the Ruhr-University Bochum at distances of approximately 20-40 km to the active coal fields. The remaining 8 stations are located in the vicinity of the mines (app. 1 to 5 km from the active mining). The magnitude of completeness is 0.9 throughout the entire Ruhr coal mining district with a local magnitude of completeness of 0.7 depending on the network configuration. In general, the identified earthquakes have a horizontal location uncertainty of 3 km. The routine detection and location of the seismicity is done by classical methods, e. g. based on first arrivals, and advanced methods like array techniques or cross-correlation of waveforms of master events with recorded seismograms from selected stations. Additionally selected event clusters are studied in more detail by reprocessing sub-datasets with methods like cluster analysis or consistent phase-picking. Reassessing this unique dataset of 30 years continuous recordings with newly developed methods and modern data processing techniques can provide new insights of the nature of mining induced seismicity. This methods may also be usable in the field of geothermal energy, unconventional hydrocarbon reservoirs or underground storage of carbon dioxide which also deals with the detection and handling of large amounts of small magnitude earthquakes.

  11. Results of the application of persistent scatterers interferometry for surface displacements monitoring in the Azul open pit manganese mine (Carajás Province, Amazon region) using TerraSAR-X data

    Science.gov (United States)

    Pinto, Carolina d. A.; Paradella, Waldir R.; Mura, José C.; Gama, Fabio F.; dos Santos, Athos R.; Silva, Guilherme G.

    2014-10-01

    Brazil has 10% of global Mn reserves with its most important mine located in the Amazon region. The Azul deposit is related to sandstones and siltstones of the Águas Claras Formation (Archean), situated in the central portion of the Carajás Strike-Slip System. Vale S.A. mining company operates the Azul mining complex with three simultaneous excavations (mines 1, 2 and 3) conducted on rock materials of low geomechanical qualities. Mining operations are openpit, with 4-8 m-high benches and depth of 80 m. A stack of 19 TerraSAR-X (TSX) images was used for the investigation covering the period of March 20-October 4, 2012. In order to minimize the topography phase error in the interferometric process, a high resolution DEM was generated based on a panchromatic GeoEye-1 stereo pair. Persistent Scatterers Interferometry (PSI) analysis was carried out using the IPTA (Interferometric Point Target Analysis) software and led to the detection of 40,193 point-wise persistent scatterers (PS), with an average density of 5,387 PS/km2. It was concluded that most of the mining area can be considered stable during the TSX coverage. High deformation rates related to settlements were mapped over a waste pile, while small deformation rates were detected along the north and south flanks of mine 1and were interpreted as cut slope movements toward the center of the pit. Despite only ground-based radar measurements were available for a short time period during the TSX coverage, and covering a sector of bench walls along the south flank of mine 1, the PSs movement patterns showed concordance with the field measurements. The investigation emphasized the important role that PSI technique can play in planning and risk assessment in this mining area. Monitoring of this type of deformation by PSI can usefully complement other commonly used field geotechnical measurements due to the synoptic SAR coverage over a dense grid, providing ground deformation data independently of field access and with

  12. Extent of Abandoned Underground Coal Mines and Surface Mines in the Boulder-Weld Coal Field (friminedu)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This file is a digital polygon representation of the areal extent of abandoned underground coal mines and surface mines in the Boulder-Weld coal field, Denver...

  13. Analysis on Underground Coal Mining Subsidence Using Small Baseline InSAR in Yunjialing Mining Areas

    Science.gov (United States)

    Yan, Dapeng; Yang, Jin; Zeng, Qiming

    2013-01-01

    66.6 percent of China's energy production come from underground coal mining (fig. 1.) Hundreds of mining cities were affected by mining subsidence. Long-term underground mining activities ,which results in large areas of mined areas, are threatening the local ecological environment and people property.Coal mining development has become a major factor of restricting local economic and threatening the safety of future mine production. The research on mining subsidence takes a important practical significance.

  14. 基于复利法的露天矿山生产设备优化配置%Optimized Configuration of Mechanical Equipment in Open-Pit Mines Based on the Compound Interest Method

    Institute of Scientific and Technical Information of China (English)

    吴长振; 戴剑勇; 杨仕教

    2011-01-01

    Considering the time value of funds, based on the depreciation method of compound interest and the relationship between mine production scale and equipment capacity and actual conditions of mines, the paper solves the optimized configuration problem about the type of main mechanical equipment and the quantity by applying integrated planning and Matlab software at the preliminary scheduling phase. This optimized configuration scheme brings better benefits for mining enterprises and provides a new idea about optimized configuration of equipment in capital construction phase of mine.%考虑到资金使用的时间价值,依据复利法的折旧方式以及矿山生产规模与设备生产能力的关系,结合矿山的实际情况,运用整数规划及Matlab软件解决露天矿山在生产规划阶段主体机械的设备型号、数量选择的优化配置问题,进而使矿山取得较好的经营效益,为基建期的矿山企业优化机械设备提供了一种新思路.

  15. 基于三维仿真和动态评估的露天矿采剥顺序优化%Open Pit Mining-stripping Sequence Optimization Based on 3D Simulation and Dynamic Evaluation

    Institute of Scientific and Technical Information of China (English)

    杨彪; 罗周全; 陆广; 张旭芳; 鹿浩

    2011-01-01

    The disorder distribution of ore grade leads to different econonmic benefits caused by different stripping order. In order to obtain superior mine scheduling scheme, the paper proposed a mining sequence optimization method based on 3D simulation and dynamic assessment. By 3D simulation, the dynamic excavation of complex open mine under multi-level constraints was realized, and excavation quantity and grade of ore were obtained. Accoruding to mine general layout, stripping position and development, the calculation of transport distance, equipment selection, and infrastructure investment evaluation were carried out. And then combining the mineral advance price, the net present value of each scheme models was calculated. And finally the best optimization scheme through comparing NPV was determined. Take one molybdenum mine as example. First create a geological block model in the Surpac, and then assign the mine grade and value to the model, finally obtain series nest limit schemes by discounting price. According to the actual mining conditions, using MineSched software, the mining-stripping schemes were scheduled through various constraint means, and the optimal scheme was determined by applying the dynamic economic assessment.%矿石品位分布无序,导致矿山不同采剥顺序所得经济效益差别很大,为获得优越的矿山排产方案,提出了基于三维仿真和动态评估的露天矿开采顺序优化方法.利用三维仿真技术实现复杂露天矿山矿岩多层次约束的动态开挖,获得每年矿岩采剥量及出矿品位.根据矿山总图布置、采剥位置和发展方式计算矿岩运距,进行矿山设备选型,进而估算矿山基建投资,在矿产品预测售价基础上计算各方案净现值,经比较确定最优开采顺序.以某大型钼矿为例,在矿业软件Surpac中创建了地质块体模型并进行品位估算和价值参数赋值,然后通过矿石售价折扣方式获得系列嵌套

  16. Geotechnical applications of geophysics in coal mining

    Energy Technology Data Exchange (ETDEWEB)

    Hatherly, P. [CMTE/CSIRO Exploration and Mining, North Ryde, NSW (Australia)

    2002-07-01

    In coal mining, geophysical techniques have an established application in determining the location of seam boundaries ahead of the face so that underground mines can be planned to avoid any geological structures that might disrupt production. Geophysics can also be used in geotechnical studies to determine the in situ properties of the rock mass and the response of the rock mass to the mining. The use of geophysical logs and microseismic monitoring in these geotechnical applications are discussed in this paper. 16 refs., 4 figs.

  17. 76 FR 70075 - Proximity Detection Systems for Continuous Mining Machines in Underground Coal Mines

    Science.gov (United States)

    2011-11-10

    ... Period On August 31, 2011 (76 FR 54163), MSHA published a proposed rule, Proximity Detection Systems for... Mining Machines in Underground Coal Mines AGENCY: Mine Safety and Health Administration, Labor. ACTION... addressing Proximity Detection Systems for Continuous Mining Machines in Underground Coal Mines....

  18. Need for Clean Coal Mining in India

    Directory of Open Access Journals (Sweden)

    Sribas Goswami

    2014-04-01

    Full Text Available Coal mining contributes largely towards economic development of the nation although it has a great impact on the human health. It also has an impact on a socio-cultural aspect of workers and people residing in and around coal mining areas. Thus a holistic approach to taking up with mining activities, keeping in mind the concerns over adjoining habitats and ecosystem, is the need of the hour. This requires identification of various sites where minerals exist, of various factors ranging from an appropriate angle of the slope of overburden dumps to safe disposal drains, of safe techniques to various silt control structures etc. In India, coal companies are now working towards “clean coal” strategies which aim to reduce environmental impacts. The reduced ash contents of the washed coal increase thermal efficiency of combustion which, in turn, makes a direct impact on reducing emissions of pollutants. However, the coal washing requires extra water and it can turn towards a pollution free society.

  19. Pneumatic automation systems in coal mines

    Energy Technology Data Exchange (ETDEWEB)

    Shmatkov, N.A.; Kiklevich, Yu.N.

    1981-04-01

    Giprougleavtomatizatsiya, Avtomatgormash, Dongiprouglemash, VNIIGD and other plants develop 30 new pneumatic systems for mine machines and equipment control each year. The plants produce about 200 types of pneumatic systems. Major pneumatic systems for face systems, machines and equipment are reviewed: Sirena system for remote control of ANShch and AShchM face systems for steep coal seams, UPS control systems for pump stations, PAUZA control system for stowing machines, remote control system of B100-200 drilling machines, PUSK control system for coal cutter loaders with pneumatic drive (A-70, Temp), PUVSh control system for ventilation barriers activated from moving electric locomotives, PAZ control system for skip hoist loading. Specifications of the systems are given. Economic benefit produced by the pneumatic control systems are evaluated (from 1,500 to 40,000 rubles/year). Using the systems increases productivity of face machines and other machines used in black coal mines by 5 to 30%.

  20. Radon concentration measurements in bituminous coal mines

    International Nuclear Information System (INIS)

    Radon measurements were carried out in Kozlu, Karadon and Uezuelmez underground coal mines of Zonguldak bituminous coal basin in Turkey. Passive-time integrating method, which is the most widely used technique for the measurement of radon concentration in air, was applied by using nuclear etched track detectors (CR-39) in the study area. The radon concentration measurements were performed on a total of 42 points in those three mines. The annual exposure, the annual effective dose and lifetime fatality risk, which are the important parameters for the health of workers, were estimated based on chronic occupational exposure to the radon gas, which is calculated using UNCEAR-2000 and ICRP-65 models. The radon concentrations at several coal production faces are higher than the action level of 1000 Bq m-3. It is suggested that the ventilation rates should be rearranged to reduce the radon concentration. (authors)

  1. Radon concentration measurements in bituminous coal mines.

    Science.gov (United States)

    Fisne, Abdullah; Okten, Gündüz; Celebi, Nilgün

    2005-01-01

    Radon measurements were carried out in Kozlu, Karadon and Uzülmez underground coal mines of Zonguldak bituminous coal basin in Turkey. Passive-time integrating method, which is the most widely used technique for the measurement of radon concentration in air, was applied by using nuclear etched track detectors (CR-39) in the study area. The radon concentration measurements were performed on a total of 42 points in those three mines. The annual exposure, the annual effective dose and lifetime fatality risk, which are the important parameters for the health of workers, were estimated based on chronic occupational exposure to the radon gas, which is calculated using UNCEAR-2000 and ICRP-65 models. The radon concentrations at several coal production faces are higher than the action level of 1000 Bq m(-3). It is suggested that the ventilation rates should be rearranged to reduce the radon concentration.

  2. Instability and support of coal mine ribs

    Energy Technology Data Exchange (ETDEWEB)

    O' Beirne, T.; Shepherd, J.; Rixon, L.K.; Napper, A.

    1987-01-01

    The stabilisation of coal ribs is seen as a key goal in the safe, efficient mining of thick seam friable coals or within zones of high strata pressures. Active rib stabilisation measures are being practised by an increasing number of operators with little or no technical knowledge on the mechanisms causing rib failure, or the remedial measures available. Research work undertaken by Australian Coal Industry Research Laboratories Ltd. (ACIRL) has delineated two distinctly different mechanisms causing rib failure. Various systems have also been developed for combating those mechanisms. Investigations have centred at operating mines, where the mechanisms were first studied; then trials of remedial measures were undertaken. Operators can use the results in this report to define the conditions in their operations and select the most efficient remedial measures. Comments on the use of rib supports for increasing the strength of pillars have been made.

  3. The control of coal mine gas and coordinated exploitation of coal bed methane in China

    Institute of Scientific and Technical Information of China (English)

    LIU Jian-zhong

    2009-01-01

    Based on the characteristics of the coalfield geology and the distribution of coal bed methane (CBM) in China, the geological conditions for exploiting the CBM and drain-ing the coal mine gas were analyzed, as well as the characteristics of CBM production. By comparing the current situation of CBM exploitation in China with that in the United States, the current technology and characteristics of the CBM exploitation in China were summa-rized and the major technical problems of coal mine gas control and CBM exploitation analyzed. It was emphasized that the CBM exploitation in China should adopt the coal mine gas drainage method coordinated with coal mine exploitation as the main model. It was proposed that coal mine gas control should be coordinated with coal mine gas ex-ploitation. The technical countermeasure should be integrating the exploitation of coal and CBM and draining gas before coal mining.

  4. Management present situation and countermeasures of coal mines safety in production

    Institute of Scientific and Technical Information of China (English)

    ZHANG Shu-dong; YU Chang-wu

    2008-01-01

    Analyzed of the present situation of Chinese coal mines safety in production and the reasons for coal mining accident, and realized the coal mines safety in production,which should increase the legal safeguards of coal mine safety in production, and safety input, established the comprehensive coal mine safety evaluation system, comprehensively enhance quality of coal mine workers, established and improved early warning mechanism of safety production of coal mine.

  5. Game Analysis between Government and Coal Mine Enterprise in Coal Resource Exploitation Environmental Impact Compensation

    Directory of Open Access Journals (Sweden)

    MENG Zhao-jian

    2013-08-01

    Full Text Available From the angle of compensation subject and compensation object, the interest involved with stakeholder was analyzed. Based on game theory, the relation between government and coal mine enterprise was analyzed. Through the research, the government should constraint the coal mine enterprise behavior, set up coal resources development environmental impact compensation incentive mechanism, increase coal resources exploitation and environmental compensation violations punishment, and incentive the coal mining enterprises.

  6. Management of mining-related damages in abandoned underground coal mine areas using GIS

    International Nuclear Information System (INIS)

    The mining-related damages such as ground subsidence, acid mine drainage (AMD), and deforestation in the abandoned underground coal mine areas become an object of public concern. Therefore, the system to manage the mining-related damages is needed for the effective drive of rehabilitation activities. The management system for Abandoned Underground Coal Mine using GIS includes the database about mining record and information associated with the mining-related damages and application programs to support mine damage prevention business. Also, this system would support decision-making policy for rehabilitation and provide basic geological data for regional construction works in abandoned underground coal mine areas. (authors)

  7. Recultivation of the cavity of the closed open pit Bor

    Directory of Open Access Journals (Sweden)

    Lilić Jasmina

    2008-01-01

    Full Text Available Copper ore is one of the most important raw materials for industrial production. Increasing demands have been increasing its extraction generally. Shallow deposits with higher copper grade are mostly exhausted and the open pits become deeper, also the amount of overburden and the problems of its disposal are increased. In some cases large quantities of overburden can solve the problem of recultivation of degraded areas. This is the case of recultivation of degraded areas on the location of the closed open pit Bor. Here, the overburden from another open pit, Veliki Krivelj, is disposed into the cavity of the open pit Bor. In this way the overburden is disposed without further area degradation and the cavity is primarily, technically recultivated. When the filling process is finished, waste depot will have a flat top at the level K+450 [2], which is above the neighboring terrain, and the slopes height will vary. This problem was not especially considered up to date, so the experiences in this field are humble. This paper intends to be the basis for further research.

  8. Soil eco-physiological indicators from a coal mining area in El Bierzo District (Spain).

    Science.gov (United States)

    Díaz Puente, Fco. Javier; Mejuto Mendieta, Marcos; Cardona García, Ana Isabel; Rodríguez Gallego, Vergelina; García Álvarez, Avelino

    2010-05-01

    CIEMAT. Avda. Complutense, 22. 28040 Madrid. Spain. The El Bierzo carboniferous basin (León, N.W. of Spain) is placed in a tenth of the surface of this district, in the area called "Bierzo Alto". Coal has been mined in El Bierzo from the late XVIII century, having been intensely exploited during the XX century. The mining activity has left a heritage of withdrawed mining structures. Nowadays some mining activity remains in the area, and new exploitations based on open pit processes, cause the burial of natural soil with overlaying mine tailings. Characterization and study of the edaphic landscapes in the area is a necessary activity within the framework of its overall restoration planning, also providing fundamental information for the design and monitoring of waste coal recovery activities. For this work eight zones were chosen, representing the spatial variability within the upper basin of the Rodrigatos river, into the Bierzo Alto, including reference areas not affected by mining activities. In addition three mine tailings outside the area are included in this work to cover the variability of restoration processes. After a first study, based on physical, physico-chemical and chemical characteristics of soils, we have continued the study including some eco-physiological parameters. The objective of this work is to identify potential soil disruption, its extent and causes. Soil microbial activity is influenced by a wide set of soil characteristics. Eco-physiological parameters analysed in this work are: • Microbial Biomass carbon • Basal Respirometry • Maximum respiratory rate Microbial biomass carbon was analysed according the Substrate Induced Respirometry (SIR) method. Relational parameters such as metabolic quotient (CO2-C/Cmic) and the Cmic/Corg ratio have been obtained from these variables. Our results shown that soil microbial biomass carbon is strongly influenced by the water holding capacity (WHC) of the samples (R=0,895) as well as by organic

  9. Game Analysis between Government and Coal Mine Enterprise in Coal Resource Exploitation Environmental Impact Compensation

    OpenAIRE

    MENG Zhao-jian

    2013-01-01

    From the angle of compensation subject and compensation object, the interest involved with stakeholder was analyzed. Based on game theory, the relation between government and coal mine enterprise was analyzed. Through the research, the government should constraint the coal mine enterprise behavior, set up coal resources development environmental impact compensation incentive mechanism, increase coal resources exploitation and environmental compensation violations punishment, and incentive the...

  10. Simulation Based Investigation of Different Fleet Management Paradigms in Open Pit Mines-A Case Study of Sungun Copper Mine / Symulacje I Badania Różnych Paradygmatów Wykorzystania Floty Pojazdów I Urządzeń W Kopalniach Odkrywkowych. Studium Przypadku: Kopalnia Miedzi W Sungun

    Science.gov (United States)

    Hashemi, Ali Saadatmand; Sattarvand, Javad

    2015-03-01

    Using simulation modeling, different management systems of the open pit mining equipment including non-dispatching, dispatching and blending solutions have been studied for the Sungun copper mine. Developed model has the capability of considering detailed features of both loading and hauling equipment. Productivity assessment scenarios have been established on the constructed model and the outputs revealed the noteworthy impact of the match factor of the trucks to the loaders on the production rate by over 40%. A dispatching simulation model with the objective function of minimizing truck waiting times have been developed and 7.8% improvement obtained by applying a flexible assignment of the trucks for the loaders compared to the fixed assignment system. Finally ore grade blending control unit has been introduced into the model. Getting the advantages of the newly added module it became possible to monitor the portion of material excavated from different operating benches and control truck dispatching rules for keeping the overall ore grade exactly at desired value. Przy użyciu modeli symulacyjnych zbadano różnorodne systemy zarządzania flotą pojazdów i urządzeń w kopalni odkrywkowej (wydawanie dyspozycji przewozu, wstrzymywanie przewozu oraz rozwiązania kwestii mieszania o rud o różnej zawartości pierwiastka użytecznego) na przykładzie kopalni miedzi Sungun. Opracowany model uwzględnia szczegółowe cechy sprzętu przeładunkowego oraz transportowego. Na podstawie modelu opracowano następnie scenariusze oceny wydajności, a wyniki jednoznacznie wykazały wielką wagę odpowiedniego skojarzenia ilości pojazdów i ładowarek. Opracowano model symulacyjny kierowania urządzeń do pracy, jako funkcję celu przyjmujący minimalizacje czasu przestoju ciężarówek. Uzyskano wynik lepszy o 7.8% poprzez elastyczne przydzielania pojazdów do ładowarek w porównaniu do systemu trwałego ich do siebie przypisania. W ostatnim etapie dodano do modelu system

  11. Energizing America with coal. Proceedings of the 88th regular meeting of The Rocky Mountain Coal Mining Institute

    International Nuclear Information System (INIS)

    Topics discussed at the meeting include: American coal technology; electric supply and demand; opportunities in power generation; the Clean Coal Technology Program; coal mining; the coal market; total quality management in the mining industry; mining productivity; mine rescue performance evaluation; and data on coal production. Papers have been processed separately for inclusion on the data base

  12. Survey of nine surface mines in North America. [Nine different mines in USA and Canada

    Energy Technology Data Exchange (ETDEWEB)

    Hayes, L.G.; Brackett, R.D.; Floyd, F.D.

    1981-01-01

    This report presents the information gathered by three mining engineers in a 1980 survey of nine surface mines in the United States and Canada. The mines visited included seven coal mines, one copper mine, and one tar sands mine selected as representative of present state of the art in open pit, strip, and terrace pit mining. The purpose of the survey was to investigate mining methods, equipment requirements, operating costs, reclamation procedures and costs, and other aspects of current surface mining practices in order to acquire basic data for a study comparing conventional and terrace pit mining methods, particularly in deeper overburdens. The survey was conducted as part of a project under DOE Contract No. DE-AC01-79ET10023 titled The Development of Optimal Terrace Pit Coal Mining Systems.

  13. Labour productivity in coal mining sector in India: with special to major coal mining states

    OpenAIRE

    Santra, Swarup; Bagaria, Nidhi

    2014-01-01

    Coal is one of the Primary sources of Energy accounting for about 67% of total energy consumption in India. The production of Coal has increased from 35 million tons in 1951 to 409.3 million tons in 2004. At the same time, the Average Daily Employment (ADE) has increased from 352 thousand in 1951 to 405 thousand in 2004. However, the journey of Coal sector was not uniform throughout the five decades. It is shown in recent time that the productivity of labour in coal mines in Tamil Nadu and Or...

  14. Seismic surveying for coal mine planning

    Energy Technology Data Exchange (ETDEWEB)

    Zhou, B. [CMTE/CSIRO Exploration and Mining, Kenmore, Qld. (Australia)

    2002-07-01

    More and more coal in Australia is extracted by underground mining methods especially by longwall mining. These methods can be particularly sensitive to relatively small-scale structural discontinuities and variations in roof and floor rock character. Traditionally, information on these features has been obtained through drilling. However, this is an expensive process and its relevance is limited to the immediate neighbourhood of the boreholes. Seismic surveying, especially by 3D seismic, is an alternative tool for geological structure delineation. It is one of the most effective geophysical methods available for identification of geological structures such as faults, folds, washouts, seam splits and thickness changes which are normally associated with potential mining hazards. Seismic data even can be used for stratigraphic identification. The information extracted from seismic data can be integrated into mine planning and design. In this paper, computer aided interpretation techniques for maximising the information from seismic data are demonstrated and the ability of seismic reflection methods to resolve localised geological features illustrated. Both synthetic and real seismic data obtained in recent 2D and 3D seismic surveys from Australian coal mines are used. 7 refs., 9 figs.

  15. Determinants of coal mine labor productivity change. [1950 to 1977

    Energy Technology Data Exchange (ETDEWEB)

    Baker, J. G.; Stevenson, W. L.

    1979-11-01

    Coal mine labor productivity (tons per miner-shift) has been falling yearly since 1970. The decline in labor productivity since 1970 has implications for the coal industry's labor demand, cost of production, and injuries and could hinder the ability of the industry to meet the coal output goals of the National Energy Plan. The purpose of this research study was to identify and measure the causes of labor productivity decline. Concise answers are given to three questions: Why is coal mine labor productivity important. What are the causes of labor productivity decline in deep and surface coal mines. What are the implications of these findings for future coal mine labor productivity. Coal mine labor productivity is important for three reasons: (1) it affects the cost of coal production, (2) it affects coal industry labor demand, and (3) it affects injuries and injury rates in coal mining. Labor productivity is the link between output levels and employment requirements. The period of declining productivity coincides with major changes in the coal industry's environment: (1) change from a largely unregulated industry to a highly regulated industry (the Coal Mine Health and Safety Act of 1969; implementation of many state surface mine reclamation laws, etc.) and (2) change from a declining, marginal profits industry to a growing, profitable industry (increasing coal prices and demand in the 1970s). A major conclusion of the study is that a portion of the high labor productivity of the 1960s was possible because some of the costs of coal mining - worker injuries, black lung disability, and environmental damage - were not being paid for by the coal industry and coal consumers. Once these costs were forced internally on the mine operators by legislation, productivity fell and the cost of production increased.

  16. Stability Analysis of the High and Steep Slope in Lanjian Deep Open-pit Mine%兰尖铁矿深凹露天矿山高陡边坡稳定性分析

    Institute of Scientific and Technical Information of China (English)

    宋卫东; 万海文; 吴姗; 徐文彬

    2011-01-01

    To study the effect of external factors on the surface-controlled slope stability,this paper takes the slope of Yingpanshan section of Lanqian iron mine as engineering background ,and adopts the Geo-Slop software to analyze the slope stability in groundwater,seismic loads and the interaction of underground water and seismic loads respectively.The results showed that: groundwater has less impact on slope stability with safety coefficient ranging between 0.015 and 0.030;Seismic load has greater impact on slope stability ,and its safety coefficient varies between 0.125 and 0.165.Under the interaction of groundwater and seismic loads,the entire slope lies in a critical stable state.%为了研究外界因素对结构面控制型边坡稳定性的影响,以兰尖铁矿营盘山段边坡为工程背景,采用Geo-Slop软件,分别分析了该边坡在地下水、地震载荷以及地下水和地震载荷共同作用下的边坡稳定性,结果表明:地下水对边坡稳定性影响较小,安全系数的变化范围在0.015~0.030;地震载荷对边坡稳定性的影响较大,安全系数的变化范围在0.125~0.165;在地下水和地震载荷共同作用时,整个边坡处于临稳状态.

  17. Research on coal structure indices to coal and gas outbursts in Pingdingshan Mine Area, China

    Institute of Scientific and Technical Information of China (English)

    郭德勇; 宋广太; 库明欣

    2002-01-01

    According to the feature that coal and gas outbursts is controlled by coal structure in Pingdingshan mine area, based on the study of the distribution law of disturbed coal in Mine Area and the macroscopic characteristics of coal structure, the characteristics and genesis to micro-pore of disturbed coal, the relationship between the type of coal structure and gas parameter, and the structural feature of coal at outbursts sites are mainly explored in this paper. Further, the steps and methods are put forward that coal structure indices applied to forecast coal and gas outbursts.

  18. On Future Coal Mining and Human Underground Activity

    OpenAIRE

    Petras, L.

    1980-01-01

    The IIASA Research Program for 1980 includes two Industry Studies under the general heading "Issues for the Eighties". The first of these industry studies is in Coal, in particular hard coal mining underground. This Professional Paper provides background material for a discussion of new mining technologies, e.g., robot mining devices, to be considered in the context of anticipated shortage of underground manpower.

  19. 78 FR 79010 - Criteria to Certify Coal Mine Rescue Teams

    Science.gov (United States)

    2013-12-27

    ... training. MSHA published a notice in the Federal Register (78 FR 58567) announcing the availability of the... Safety and Health Administration Criteria to Certify Coal Mine Rescue Teams AGENCY: Mine Safety and... Safety and Health Administration (MSHA) has updated the coal mine rescue team certification criteria....

  20. 78 FR 58264 - Refuge Alternatives for Underground Coal Mines

    Science.gov (United States)

    2013-09-23

    ... INFORMATION: On August 8, 2013 (78 FR 48593), MSHA published a Request for Information on Refuge Alternatives... Coal Mines AGENCY: Mine Safety and Health Administration, Labor. ACTION: Request for information...) on Refuge Alternatives for Underground Coal Mines. This extension gives interested parties...

  1. Environmental damage and countermeasures in Chinese coal mine areas

    International Nuclear Information System (INIS)

    The paper discusses three aspects of the ecological environmental damage in China: ground subsidence due to underground coal mining, pollution of mine refuse from underground, and release of fly ash from power plants within coal mine areas. The paper proposes the comprehensive countermeasures for solving these problems. The author puts forward several ways and applications of disposal which could help alleviate the problems, and introduces the subsidence prediction principle in long wall mining. This technology calculates the subsidence, displacement and deformation at every point according to mining schedule. It provides a very useful tool for subsidence control. Finally, the author provides some suggestions to improve the environment in Chinese coal mine areas

  2. Conversion of Coal Mine Gas to LNG

    Energy Technology Data Exchange (ETDEWEB)

    None, None

    2016-02-05

    This project evolved from a 1995, DOE-NETL competitive solicitation for practical CMM capture and utilization concepts. Appalachian Pacific was one of three companies selected to proceed with the construction and operation of a cost-shared demonstration plant. In the course of trying to proceed with this demonstration plant, AP examined several liquefaction technologies, discussed obtaining rights to coal mine methane with a number of coal companies, explored marketing potential with a wide variety of customers in many sections of the United States, studied in great detail the impact of a carbon credit exchange, and developed a suite of analytical tools with which to evaluate possible project options. In the end, the newness of the product, reluctance on the part of the coal companies to venture away from time tested practices, difficulty with obtaining financing, the failure of a carbon credit market to develop and the emergence of shale derived gas production prevented a demonstration plant from being built.

  3. Modelling of gravity changes in mining areas

    Energy Technology Data Exchange (ETDEWEB)

    Szostak-Chrzanowski, A.; Chrzanowski, A.; Popiolek, E. [University of New Brunswick, Fredericton, NB (Canada). Department of Geodesy and Geomatics Engineering

    1995-10-01

    The numerical modelling of gravity changes resulting from the simultaneous effects of mass relocation and rock deformation is described. The method is supported by FEMMA (Finite Element Method for Multipurpose Applications) software, and has been used for modelling expected gravity changes in a large open pit coal mine in Poland. The results are in good agreement with conventional calculations of gravity changes for a simple geometry of relocated mass. 10 refs., 6 figs., 2 tabs.

  4. Monitoring of radon daughters in coal-mine atmospheres

    International Nuclear Information System (INIS)

    In some coal mines in the Upper Silesian Coal Basin a significant concentration of radon daughters is observed. Monitoring of radon daughters in coal-mine atmospheres involves special problems related to high coal-dust concentration and methane hazards. To solve these problems an 'Integrating Radon Daughters Monitor' (IRDM) for coal-mine atmospheres has been developed. The instrument consists of a typical dust sampler, BARBARA IIIa, used in Polish coal mines, and a supplementary unit with thermoluminescent detectors. Laboratory tests in the calibration chamber showed that the IRDM response to the cumulative activity of radon daughters is independent of the dust concentration within the range 5 to 80 mg/m3 (respirable fraction). A detection limit of about 0.002 WL can be achieved with a sampling time of 8 h. Some preliminary results obtained in Polish coal mines are included. (author)

  5. Slope stability in surface mining

    Energy Technology Data Exchange (ETDEWEB)

    Hustrulid, W.A.; McCarter, M.K.; Van Zyl, D.J.A. (eds.)

    2000-07-01

    The volume contains a total of 49 invited papers in four sections entitled: rock slope design considerations; case studies in rock slope stability; stability of waste rock embankments; and tailings and heap leaching. Three papers are directly relevant to coal mining: coal mine highwall stability by Ben Seegmiller; construction and operation of a major mined-rock disposal facility at Elkview Coal Corporation, British Colombia by Brent Zeitz; and steepened spoil slopes at Bridger Coal Company, by William Gerhard. The papers were invited in the long time lapse between the 3rd and 4th international conference on stability in open pit mining to supplement earlier proceedings. Immediately following the publication of this volume, a symposium was held in conjunction with the 2001 SME annual meeting in Denver, Colorado, USA.

  6. Introduction to the coal mining industry in China

    International Nuclear Information System (INIS)

    Some basic data on the coal mining industry in China, such as energy production and construction, coal consumption, production by classification, coal reserves, coal produced by seams angle, by thickness, by mechanization, by methods, etc., are introduced in this paper. 3 refs., 9 figs., 9 tabs

  7. Depth to Coal Mining in the Colorado Front Range (frimndpthu)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This file is a digital polygon representation of the depth to (overburden above) abandoned underground coal mines in the Boulder-Weld coal field, Denver Basin,...

  8. Open pit slope deformation monitoring by fiber Bragg grating sensors

    Science.gov (United States)

    Xu, Guoquan; Xiong, Daiyu; Duan, Yun; Cao, Xiaoshuang

    2015-01-01

    With microstrain resolution and the capability to sample at rates of 2000 Hz or higher, fiber Bragg grating (FBG) strain sensor offers exciting new possibilities for in situ deformation monitoring induced by blasting load in an open pit slope. Here, we are developing a new technology for measuring deformation in real time on the microstrain in an open pit slope during the blasting. A fiber optically instrumented rock mass strain sensor measured strain at 100-cm intervals along a two anchor rock bolt grouted in the slope intact rock mass. In field testing, a number of transient signals have been observed, which in some cases were large enough to trigger rapid sampling. The combination of short- and long-term observation offers new insight into the slope stability and blasting cumulative effects. Therefore, FBG sensors are a useful tool for measuring in situ strain in intact rock masses.

  9. Subsidence and reclamation in coal mine areas of China

    International Nuclear Information System (INIS)

    Coal mining has caused widespread ground surface subsidence and deterioration of soil structure in China. Approximately 8,500,000 hectares of land have been affected by subsidence. Two major causes of subsidence are the mining technique used and the pumping of ground water to facilitate coal extraction. About 60% of all coal mines in China have been included in a reclamation study. This study includes filling underground mines with gangue, coal ash, and garbage and use of subsided areas as fish ponds and wastewater treatment ponds

  10. PROBLEMS AND COUNTERMEASURES OF ENVIRONMENTAL PROTECTION IN COAL MINES

    Institute of Scientific and Technical Information of China (English)

    王立杰; 傅贵辰

    1995-01-01

    This paper discusses the problems about the environmental pollution of the coal mines in China and analyses the main reasons which caused the pollution of coal mining areas and puts forward the view that we should get rid of our traditional concepts about social development and take the paths of sustained development. This paper also gives the suggestion that strict rules and laws for the protection of environment of the coal mining ares should be set up and favourabh policies be worked out to promote the improvement of coal mining area's environment.

  11. Burnout in Chinese coal mine safety supervision

    International Nuclear Information System (INIS)

    This study examines commonly-suffered job burnout as it relates to the practice of safety supervision in Chinese coal mine enterprises. Commonly-suffered job burnout is a form of job burnout caused by external factors. It is closely related to task characteristics rather than individual idiosyncrasies. To explore the causes of commonly-suffered job burnout, the special attributes (the integrated output attributes, conditional output attributes, and public goods attributes) of coal mine safety output and the inevitability of the invalidation of the bounded authority in safety supervision were analyzed in this study, which reveals the formation mechanism of commonly-suffered job burnout. Moreover, a confirmatory game model was constructed to analyze how the attributes of the safety output and bounded authority of safety supervision act on the safety output. The theoretical connotation of commonly-suffered job burnout was explained based on the job demands-resources theory. A comparative analysis of commonly-suffered job burnout and the job burnout that occurs in the traditional research object was also undertaken from the viewpoint of the job demands, which are determined by the characteristics of the work task and their corresponding coping resources. Policy suggestions were given based on interventions in commonly-suffered job burnout. -- Highlights: •We discuss commonly-suffered job burnout in Chinese coal enterprises. •We analyze the special attributes of coal mine safety output. •We explore two main causes of commonly-suffered job burnout. •We construct a game model to validate how the two causes act on safety output. •We put forward related policy suggestions

  12. Coal mining in Saarland; Der Steinkohlenbergbau im Saarland

    Energy Technology Data Exchange (ETDEWEB)

    Bronder, G. [Deutsche Steinkohle AG, Ensdorf (Germany)

    2005-05-01

    In 2004, 6.194 million t of coal were produced in the Saar district. About 6.01 t were produced by DSK, the rest of 180,000 t by Bergwerksgesellschaft Merchweiler mbH, a small independent mining company working abandoned mines at near-surface level. With the set-up of Bergwerk Saar out of the former mines Warndt/Luisenthal and Ensdorf in early 2004, Deutsche Steinkohle Aktiengesellschaft set the pace for future coal mining in the Saar and now owns Germany's biggest coal mine. The results and projecting so far are optimistic for the future. (orig.)

  13. Coal mining in the Saar; Der Steinkohlenbergbau im Saarland

    Energy Technology Data Exchange (ETDEWEB)

    Bronder, G. [Deutsche Steinkohle AG, Ensdorf (Germany)

    2005-07-01

    Early in 2004, the Deutsche Steinkohle Aktiengesellschaft set the pace for future coal mining in the Saar district by combining two mines, Warndt/Luisenthal and Ensdorf, into Bergwerk Saar, which is now Germany's biggest coal mine. The measures taken are described in detail in this contribution. Examples are presented of mining technologies, and improvements of the underground infrastructure by means of an optimized bunker and production concept are described. The Deutsche Steinkohle Aktiengesellschaft is optimistic about the future of Saar coal mining. (orig.)

  14. Microbial ecology of coal mine refuse

    Energy Technology Data Exchange (ETDEWEB)

    Cameron, R. E.; Miller, R. M.

    1977-01-01

    Baseline microbial and ecological studies of samples obtained from two abandoned coal mine refuse sites in the State of Illinois indicate that the unfavorable nature of refuse materials can be a very limiting factor for survival and growth of organisms. Despite the ''foothold'' obtained by some microorganisms, especially acidophilic fungi and some acidotolerant algae, the refuse materials should be amended or ameliorated to raise the pH, provide needed nutrients, especially nitrogen, and provide biodegradable organic matter, both for physical and biological purposes. Finally, the role of microbial populations, responses, and interactions in acid mine wastes must be put into larger perspective. Acid mine drainage amounts to over 4 million tons per year of acidity from active and abandoned mines. Microorganisms appear to be significantly responsible for this problem, but they also can play a beneficial and significant role in the amelioration or alleviation of this detrimental effect as abandoned mines are reclaimed and returned to useful productivity.

  15. 4D seismic data acquisition method during coal mining

    International Nuclear Information System (INIS)

    In order to observe overburden media changes caused by mining processing, we take the fully-mechanized working face of the BLT coal mine in Shendong mine district as an example to develop a 4D seismic data acquisition methodology during coal mining. The 4D seismic data acquisition is implemented to collect 3D seismic data four times in different periods, such as before mining, during the mining process and after mining to observe the changes of the overburden layer during coal mining. The seismic data in the research area demonstrates that seismic waves are stronger in energy, higher in frequency and have better continuous reflectors before coal mining. However, all this is reversed after coal mining because the overburden layer has been mined, the seismic energy and frequency decrease, and reflections have more discontinuities. Comparing the records collected in the survey with those from newly mined areas and other records acquired in the same survey with the same geometry and with a long time for settling after mining, it clearly shows that the seismic reflections have stronger amplitudes and are more continuous because the media have recovered by overburden layer compaction after a long time of settling after mining. By 4D seismic acquisition, the original background investigation of the coal layers can be derived from the first records, then the layer structure changes can be monitored through the records of mining action and compaction action after mining. This method has laid the foundation for further research into the variation principles of the overburden layer under modern coal-mining conditions. (paper)

  16. STABILITY ANALYSES OF FOOTWALL SLOPES IN OPEN PIT MINING

    Directory of Open Access Journals (Sweden)

    LEANDRO R. ALEJANO

    2010-01-01

    Full Text Available En éste artículo se analizan diferentes mecanismos de rotura típicamente asociados a taludes de muro, con el objetivo de poder evaluar su estabilidad, mediante el código numérico UDEC (Código de Elementos Distintos Universal. Se analizan, también, mediante métodos de equilibrio límite (MEL, comparándose los resultados obtenidos por ambos métodos, a fin de determinar la validez del código UDEC como herramienta de análisis de la estabilidad de taludes de muro. Se incluye además, el análisis de dos casos reales, en los que la rotura del talud se produjo por mecanismos complejos.

  17. Good prospects for Indonesia's coal mining industry

    Energy Technology Data Exchange (ETDEWEB)

    Suhala, S. [APBI-ICMA (Indonesia)

    2010-05-15

    Indonesia's new mining law will help provide investment opportunities for mining companies looking to the country's abundant coal and mineral reserves. An essential part of the new Mining Law No. 4/2009 is the change of the mining contract scheme by the mining permit. Previous contracts and license are replaced by Izin Usaha Pertambangan (IUP)/Mining Permit (P). Also under the new law the Domestic Market Obligation (DMO) will be applied to all mineral and coal producers to ensure the availability of mineral and coal as raw materials and energy sources to meet domestic demand. APBI-ICMA, the Association of Indonesia mining companies, reports that Indonesian produced 283 mt of coal in 2009 and exported 230 mt. 2 photos.

  18. Experimental study on the variation law of coal temperature during excavation in coal mines

    Institute of Scientific and Technical Information of China (English)

    Yi-Shan PAN; Lian-Man XU; Zhong-Hua LI; Guo-Zhen LI

    2013-01-01

    By testing the temperature of the coal and the stress of the working surface,we got the variation law of coal temperature and coal stress during the excavation.The result shows that the activities of mining affect the coal temperature,the fluctuation of coal temperature and the coal stress is synchronous.During the smooth change of crustal stress,the coal temperature basically keeps unchanged,when the dynamic phenomenon appears,the coal temperature changes,as well the coal stress.Therefore,we can use the online coal temperature monitoring system to test the coal temperature of the working surface continuously,and it can provide basic information for forecasting coal mine power disaster before it happens.

  19. 30 CFR 75.1907 - Diesel-powered equipment intended for use in underground coal mines.

    Science.gov (United States)

    2010-07-01

    ... underground coal mines. 75.1907 Section 75.1907 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR COAL MINE SAFETY AND HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Diesel-Powered Equipment § 75.1907 Diesel-powered equipment intended for use in underground coal mines. (a) As...

  20. Recovery modelling and water resources of the abandoned open-pit talc-chlorite-feldspar mine excavations at Lasasai-Bonucoro,Central Sardinia,Italy%意大利撒丁岛中部Lasasai-Bonucoro地区的废弃露天滑石-绿泥石-长石采矿场的水资源及其修复模式

    Institute of Scientific and Technical Information of China (English)

    Maddalena FIORI; Carlo MATZUZZI

    2004-01-01

    In the district of Orani, central Sardinia, several talc-chlorite-feldspar bodies, hosted in Palaeozoic metamorphic rocks and granites, have long been mined by open- pit operations. The mining activity has deeply modified the original landscape of the Lasasai-Bonucoro area. Thus the rearrangement of this area, in particular of the open-pit works that are now occupied by newly formed pools, filled with water from aquifers flowing along faults crossed by mining operations, should be considered as an overall project of landscape restoration. In the first phase of this work, the environmental and hydrogeological characterisation and the general definition of different zones characterised by different sets of intervention operations has already been made. The following step will include the detailed definition of the different technological interventions to be performed. In order to attain a rehabilitation of this area, first of all the interventions will include: 1) smoothing and re-modelling of local morphology in its still rough sites, namely a few points of the mine benches and dumps, by removing the volumes in excess and settling them again in the hollows, on the base of the indications obtained from opportunely plotted sections; 2) restoration of the removed soil covers, and rehabilitation of the newly formed surfaces after waste disposal, trough re-vegetation techniques including settlement of vegetal soil and nutrients, herbaceous essence hydrosowing, temporary automatic sprinkling; 3) rehabilitation of the corrected slopes, and in general of the remaining poorly vegetated surfaces, trough the above re-vegetation techniques.The above operations will result in a slightly modified plane-altimetrical and landscape arrangement. However these interventions will be sufficient to reach a new environmental qualification, characterised by several opportunities of exploitation. Particular conditions, such as the constant outflow of good-quality water and the amenity of

  1. Situation of coal mining in the Federal Republic of Germany. Year 2014

    International Nuclear Information System (INIS)

    The paper reports on the coal mining in the Federal Republic of Germany in the year 2014. Statistical data are presented for coal market, brown coal mining as well as the hard coal mining. These data consider the supply and demand of coal in Germany, and employees of the German coal industry.

  2. Coal mining situation in the Federal Republic of Germany. Year 2015

    International Nuclear Information System (INIS)

    The paper reports on the coal mining in the Federal Republic of Germany in the year 2015. Statistical data are presented for coal market, brown coal mining as well as the hard coal mining. These data consider the supply and demand of coal in Germany, and employees of the German coal industry.

  3. Assessment of reliability and efficiency of mining coal seams located above or below extracted coal seams with support coal pillars. [USSR

    Energy Technology Data Exchange (ETDEWEB)

    Batmanov, Yu.K.; Bakhtin, A.F.; Bulavka, E.I.

    1981-04-01

    Mining thin (under 1.1 m) coal seams located above or below extracted thicker coal seams in which coal support pillars were left is one of the ways of increasing coal output without major investment in Donbass coal mines. It is planned that by 1985 25 thin coal seams will be mined in the Donbass. Investigations show that mining thin coal seams with gradients up to 12 degrees by a system of raise faces without leaving coal pillars is economical using mining systems available at present. This mining scheme is economical also in the case of coal seams located in zones of geologic dislocations. Using integrated mining systems (coal cutter, powered supports and face conveyor) in this coal seams would reduce mining cost from 0.2 to 0.3 rubles/t. Using automated integrated mining systems is economical in working faces with coal output exceeding 900 t/d. (3 refs.) (In Russian)

  4. Hydrochemical characteristics of the natural waters associated with the flooding of the Meirama open pit (A Coruna, NW Spain)

    Energy Technology Data Exchange (ETDEWEB)

    Delgado, J.; Juncosa, R.; Vazquez, A.; Falcon, I.; Canal, J.; Hernandez, H.; Padilla, F.; Rodriguez-Vellando, P.; Delgado, J.L. [University of La Coruna, La Coruna (Spain). School of Civil Engineering

    2008-02-15

    In December, 2007, after 30 years of operations, the mine of Meirama ceased extraction of brown lignite. Since then operations have begun which will lead to the formation of a big mining lake (about 2 km{sup 2} surface and up to 180 m deep) after controlled flooding of the open pit. In the process of flooding, both surface and ground waters are involved, each with their own chemical signature. According to the information available, the diversion of surface waters towards the pit hole should lead to the formation of a water body of acceptable quality. However, all unassisted flooding process could eventually form all acidic lake.

  5. Study on ascending mining roadway layout of close distance coal seams in deep mine

    Institute of Scientific and Technical Information of China (English)

    SHI Yong-kui; MO Ji

    2007-01-01

    To solve the problems appeared in mining process of No.2 seam, the ascending stress-releasing mining method was adopted. Studying on the reasonable layout of actual mining roadway in upper coal seams is the precondition of successful ascending mining.By using "device of leak measuring by blocking up double ends", it detected the height of overburden water flowing fractured zone originated from sub-coal seams mining. Thus it proved that the actual mining roadway of No.2 upper ascending seam was located in the smooth sagging zone. On the basis of analyzing the stress-releasing effect of sub-coal seams mining to upper coal seams by using RFPA software, it analyzed the stability of up-face coal seams and the reasonable location of starting cut in up-face coal seams. It also analyzed the reasonable gateway location in upper coal seams, which ensured the crossheading in upper coal seams out of the effect of sub-coal work face mining by using theory of underground pressure. Meanwhile, the reasonable pillars dimensions in upper coal seams by building the structure mechanics model of stope were researched. It can make the roadway driven along next goaf to be located in low stress zone, and be beneficial to keeping roads stable owing to less stress of surrounding rock. Finally, it tested the rationality of the layout method of roads in upper coal seams by engineering field measurement in 3221 working face.

  6. Influence of Mining Thickness on the Rationality of Upward Mining in Coal Seam Group

    Directory of Open Access Journals (Sweden)

    Y. Li

    2016-04-01

    Full Text Available This study aimed to determine the influence of mining thickness on the rationality of upward mining in coal seam group. Numerical simulation and theoretical analysis were performed to investigate the influence of the mining thicknesses of initial mining seam on the destruction and pressure relief effect of the upper coal seam in a high-gas coal seam group. The mechanical model of the roof failure based on the mining thickness was established by assuming that the gob formed after adjacent panels have fully been caved is the infinite plane. On the basis of this model, an equation was derived to calculate the roof failure height of the panel. Considering the geological conditions of No. 9 and No. 12 coal seams of Zhaogezhuang Coal Mine, economic effectiveness, and proposed techniques, we concluded that the top layer (4 m of the No. 12 coal seam should be mined first. The top layer of the No. 9 coal seam should be subsequently mined. The topcaving technique was applied to the exploitation of the lower layer of the No. 12 coal seam. Practically monitored data revealed that the deformation and failure of the No. 2699 panel roadway was small and controllable, the amount of gas emission was reduced significantly, and the effect of upward mining was active. The results of this study provide theory basics for mine designing, and it is the provision of a reference for safe and efficient coal exploitation under similar conditions.

  7. COMPUTER PROCESSING OF MULTISPECTRAL SCANNER DATA OVER COAL STRIP MINES

    Science.gov (United States)

    There is little doubt that remote sensing techniques can be effectively applied to the task of monitoring coal strip mine progress and reclamation work. Aircraft multispectral scanner data acquired over six coal strip mines in the states of Wyoming, Montana, Colorado, and Arizona...

  8. Research on safety management shell in coal mine

    Institute of Scientific and Technical Information of China (English)

    LI Hong-xia(李红霞); TIAN Shui-cheng(田水承); YU Zhong-ming(郁钟铭); CHEN Yong-gang(陈勇刚)

    2004-01-01

    Based on the shell (jieke) theory investigation of accident prevention in coal mine, submited a new definition of safety management shell, and analyzed causes on the lack of accident prevention, then pointed that the strength of research and practice of safety management is necessary to format enduring safety in coal mine.

  9. 30 CFR 816.83 - Coal mine waste: Refuse piles.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 3 2010-07-01 2010-07-01 false Coal mine waste: Refuse piles. 816.83 Section... ACTIVITIES § 816.83 Coal mine waste: Refuse piles. Refuse piles shall meet the requirements of § 816.81, the... drainage may not be diverted over the outslope of the refuse piles. Runoff from the areas above the...

  10. 30 CFR 817.83 - Coal mine waste: Refuse piles.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 3 2010-07-01 2010-07-01 false Coal mine waste: Refuse piles. 817.83 Section... ACTIVITIES § 817.83 Coal mine waste: Refuse piles. Refuse piles shall meet the requirements of § 817.81, the... drainage may not be diverted over the outslope of the refuse pile. Runoff from areas above the refuse...

  11. Regional gas drainage techniques in Chinese coal mines

    Institute of Scientific and Technical Information of China (English)

    Wang Haifeng; Cheng Yuanping; Wang Lei

    2012-01-01

    China's rapid economic development has increased the demand for coal.These results in Chinese coal mines being extended to deeper levels.The eastern Chinese,more economical developed,regions have a long history of coal mining and many coal mines have now started deep mining at a depth from 800 to 1500 m.This increase in mining depth,geostresses,pressures,and gas content of the coal seam complicates geologic construction conditions.Lower permeability and softer coal contribute to increasing numbers of coal and gas outburst,and gas explosion,disasters.A search on effective methods of preventing gas disasters has been provided funds from the Chinese government since 1998.The National Engineering Research Center of Coal Gas Control and the Huainan and Huaibei Mining Group have conducted theoretical and experimental research on a regional gas extraction technology.The results included two important findings.First,grouped coal seams allow adoption of a method where a first,key protective layer is mined to protect upper and lower coal seams by increasing permeability from 400 to 3000 times.Desorption of gas and gas extraction in the protected coal seam of up to 60%,or more,may be achieved in this way.Second,a single seam may be protected by using a dense network of extraction boreholes consisting of cross and along-bed holes.Combined with this is increased use of water that increases extraction of coal seam gas by up to 50%.Engineering practice showed that regional gas drainage technology eliminates regional coal and gas outburst and also enables mining under low gas conditions.These research results have been adopted into the national safety codes of production technology.This paper systematically introduces the principles of the technology,the engineering methods and techniques,and the parameters of regional gas drainage.Engineering applications are discussed.

  12. Drosscape resilience : from coal mine waste dump to performative ground

    OpenAIRE

    Lin, Dejun, Steven; 林德俊

    2015-01-01

    As it is well known to all, coal mining is the leading industry in Shanxi, China. Shanxi people are overly relying on extracting coal resource from nature to make profits. Coal mining not only contaminates the natural environment, but also restricts the social development, as it is a resource-driven industry. As the symbol of coal mines, waste dump contributes most of the pollution to the city. A series of threats such as landslide, water pollution and shortage, air-pollution, and land contam...

  13. Safety Improvement Solutions In Coal Mines Using GIS

    Science.gov (United States)

    Costa, Cristian; Lupu, Lucian; Edelhauser, Eduard

    2015-07-01

    Exploitation of coal from the Jiu Valley presents its own specific, in terms of coal mining deposit conditions, fact that required a continuous preoccupation for the monitoring of the work conditions, in order to ensure work-places safety. This paper intends to indicate a method of increasing the work environment safety using GIS technology, the analysis being completed at Lupeni Coal Mine, the largest Coal Mine in Jiu Valley, characterised by a low level of accidents that has taken place in there so far. It consists of an extension of accomplished studies in order to implement an intelligent dispatching system.

  14. Coal mining applications of CdTe gamma ray sensors

    Energy Technology Data Exchange (ETDEWEB)

    Entine, G.; Tiernan, T.; Waer, P.; Hazlett, T. (Radiation Monitoring Devices, Inc., Watertown, MA (USA))

    1990-01-01

    Cadmium telluride (CdTe) solid-state radiation detectors have been used in the development of instrumentation that improves the efficiency of coal-mining operations by helping to locate coal seams and preventing the mining of high-sulfur coal near the edges of the seam. CdTe detectors were selected for these applications because while they are small and durable, they offer good stopping power, deliver adequate spectral response and operate at low voltage. These CdTe-based instruments have passed the mine-safety standards and are now in operation in the mine. (author).

  15. Coal mining applications of CdTe gamma ray sensors

    International Nuclear Information System (INIS)

    Cadmium telluride (CdTe) solid-state radiation detectors have been used in the development of instrumentation that improves the efficiency of coal-mining operations by helping to locate coal seams and preventing the mining of high-sulfur coal near the edges of the seam. CdTe detectors were selected for these applications because while they are small and durable, they offer good stopping power, deliver adequate spectral response and operate at low voltage. These CdTe-based instruments have passed the mine-safety standards and are now in operation in the mine. (author)

  16. Variability of production in the Tito brown coal mines

    Energy Technology Data Exchange (ETDEWEB)

    Vukovic, S. (Institut za Rudarska Istrazivanja, Tuzla (Yugoslavia))

    1987-05-01

    Examines daily production fluctuations in the Banovici coal basin from 1978-1985, where 2,800-4,100 workers produced 2-2.3x10{sup 6} t/a from underground and surface mines. The underground mine used mechanized longwall mining, surface mines employed shovel excavators, draglines, dumpers and belt conveyors. Statistical data showed large variations (+/- 2.5%, from 4,630 to 7,792 t/day) in daily coal production; evaluation showed close correlations for surface and underground mines. Highest production was achieved on Saturdays and Sundays, lowest on Mondays, Wednesdays and Fridays. It is suggested that these variations may be due to maintenance work in the coal preparation plant, which was usually carried out on Mondays and Fridays. A stereogram of coal and overburden output for both types of mine and detailed statistical computations are included. 7 refs.

  17. Numerical Study on 4-1 Coal Seam of Xiaoming Mine in Ascending Mining

    Directory of Open Access Journals (Sweden)

    Lan Tianwei

    2015-01-01

    Full Text Available Coal seams ascending mining technology is very significant, since it influences the safety production and the liberation of dull coal, speeds up the construction of energy, improves the stability of stope, and reduces or avoids deep hard rock mining induced mine disaster. Combined with the Xiaoming ascending mining mine 4-1, by numerical calculation, the paper analyses ascending mining 4-1 factors, determines the feasibility of ascending mining 4-1 coalbed, and proposes roadway layout program about working face, which has broad economic and social benefits.

  18. Precision of personal sampling of respirable dust in coal mines

    Energy Technology Data Exchange (ETDEWEB)

    Breslin, J.A.; Page, S.J.; Jankowski, R.A.

    1983-02-01

    The Bureau of Mines measured respirable dust in coal mines by means of multiple dust samplers worn by persons moving about the mines. The measurements were made primarily to evaluate the effectiveness of certain dust-control techniques; however, for this report, the data have been analyzed to determine the precision of the personal dust-sampling measurements.

  19. Volume activity 226Ra mine waters of Ostrava-Karvina coal mines

    International Nuclear Information System (INIS)

    The State Office for Nuclear Safety, Regional Center Kamenna administers, within the framework of supervision, an inspection on workplaces of mines and discharge radionuclides into the environment from mines of Ostrava-Karvina coal mines. Join-stock company OKD exploit coal in next mines Paskov, Darkov, Lazy and CSA. Join -stock company CMD exploit coal in mine CSM. In 2002 DIAMO, state enterprise took over a part of Ostrava-Karvina coal mines and its division ODRA pump mine waters on Water-pumping shaft Jeremenko, Water- pumping shaft Zofie and close Mine Barbora. A water samples were take on main outflow mine water of mine. The presentation summarizes results from monitoring mine waters from 1999 to 2004 years. Volume activity 226Ra mine waters of Mine Lazy-locality Dukla and Water-pumping shaft Zofie are higher then clearance level from Regulation No.307/2002 Coll. On Radiation Protection. They are comparable with mine waters of uranium mines. Volume activity 226Ra surface waters under outflow perform, without stream Petrvaldska struzka under outflow Water-pumping shaft Zofie, guidance level for contamination surface waters from Government regulation No.61/2003 Coll. Volume activity 226Ra surface waters under outflow coal mines are higher then volume in surface waters under uranium mines, because mine waters from uranium mines are decontaminate on decontamination stations. Considering that volume activities 226Ra surface water of Orlovska struzka stream are under guidance level for contamination surface waters from Government regulation No.61/2003 Coll.. don't urgency arrangement to decontamination mine waters. Mass activity 226Ra in bed sediment under outflow Mine Lazy-locality Dukla are comparable with exemption level from Regulation No.307 /2002 Coll. On Radiation Protection. (authors)

  20. The safety mining theory studying for coal resource in China

    Institute of Scientific and Technical Information of China (English)

    LI Xin-chun; SUN Hong-xing; PENG Hong-jun

    2006-01-01

    The coal resource has an important role in the energy development strategy in China. Because the coal resources are a kind of non-renewable resources, a kind of exhausting resource, which is limited in quantity, and the exploitation of the recourses are not economized now, so how to realize the sustainable development for coal resource in China is very important. In this paper, two parts were researched to optimize the coal mining. In order to optimize the mining order of different mining areas, the fuzzy logic evaluation was used to build the evaluation system. The economic control theory model was built to realize the proper period to explore the coal recourses for the same mining areas.

  1. 30 CFR 75.1107-11 - Extinguishing agents; requirements on mining equipment employed in low coal.

    Science.gov (United States)

    2010-07-01

    ... equipment employed in low coal. 75.1107-11 Section 75.1107-11 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR COAL MINE SAFETY AND HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES... § 75.1107-11 Extinguishing agents; requirements on mining equipment employed in low coal. On...

  2. Analysis on safety production in coal mines Henan Province

    Institute of Scientific and Technical Information of China (English)

    KONG Liu-an; ZHANG Wen-yong

    2006-01-01

    Based on the rigorous situation of safety production in coal mines, the paper analyzed the statistical data of recent accidents indexes in Henan's coal mines. Using investigation and comparison analysis methods, a specified analysis on mining conditions, technical facility level, safety input and vocational quality of workers in Henan's coal mines was conducted. The result indicates that there have been existing such main safety production problems as weak safety management, low-level facilities, inadequate safety input and poor vocational quality and so on. Finally it proposes such reference solutions as to establish and perfect coal mining supervision and management system, to increase safety investment into techniques and facilities and to strengthen workers' safety education and introduction of more high-level professional talents.

  3. Coal mining GPS subsidence monitoring technology and its application

    Institute of Scientific and Technical Information of China (English)

    Wang Jian; Peng Xiangguo; Xu Chang hui

    2011-01-01

    We proved theoretically that geodetic height,measured with Global Positioning System (GPS),can be applied directly to monitor coal mine subsidence.Based on a Support Vector Machine (SVM) model,we built a regional geoid model with a Gaussian Radial Basis Function (RBF) and the technical scheme for GPS coal mine subsidence monitoring is presented to provide subsidence information for updating the regional Digital Elevation Model (DEM).The theory proposed was applied to monitor mining subsidence in an Inner Mongolia coal mine in China.The scheme established an accurate GPS reference network and a comprehensive leveling conjunction provided the normal height of all GPS control points.According to the case study,the SVM model to establish geoid-model is better than a polynomial fit or a Genetic Algorithm based Back Propagation (GA-BP) neural network.GPS-RTK measurements of coal mine subsidence information can be quickly acquired for updating the DEM.

  4. STUDY ON THE RELATIONSHIP BETWEEN THE DIVERSITY COAL MASS STRUCTURE AND LITHOTYPE OF COAL IN MULTI-COAL SEAM MINE

    Institute of Scientific and Technical Information of China (English)

    吴基文; 赵志根; 陈资平

    1999-01-01

    Through site observation and indoor measurements in XieJiaji No.2 Coal Mine in Huainen and Luling Coal Mine in Huaibei, it is discovered that the fragmentation degree are different in different coal seams in same mining district and even in sublevels of the same coal seam, the coal mass structures exist much difference. By analyzing the relationship between the constitution of coal matters and the epigenesis breakage of coal. This paper points out that the internal factor which causes the diversity of the coal mass structure comes from the diversity in the contents of telocollinite and desmocollinite in the vitrinite. The contenet of desmocollinite is higher than that of telocollinite in intact coal seam (sublevel) but the former is less than the later in breaking sublevel, the diversity of constituent content more affects the epigenetic fragmentation degree of coal seam. The content of desrnocollinite proves lower than that of telocollinite in the broken coal seam. The new understanding has directing, and reference for the study of coal petrology, coal mine gas geology and coal methane.

  5. Technology Research on the Fourth Panel Mining Large Height Fully-mechanized Caving Mining in Shangwan Coal Mine

    OpenAIRE

    Liu Yingjie; Wang Xiaomou

    2015-01-01

    According to the characteristics of the 1-2 coal seam of Shangwan coal mine 4th panel, this research analyzed the feasibility of sublevel caving hydraulic support in the fully-mechanized mining face through estimation method and numerical simulation calculation. This paper also researched the several factors that affect the caving property of top-coal, such as coal thickness, coal hosting depth, top-coal joint fissure, parting condition and caving height. In the meantime, the FLAC3D was used ...

  6. Watermanagement - related and ecological demands on brown-coal mining. A statement of position; Wasserwirtschaftlich-oekologische Forderungen fuer den Braunkohlenabbau. Positionspapier

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-01-01

    This statement of position aims to identify influences exerted before, during and after brown-coal open-pit mining activities and to assess them in general terms from a water-management and ecological viewpoint. The form chosen is that of individual, concise postulates. Each of these is followed by an explanation. To illustrate the great variety of potentially arising problems, the major German brown-coal mining districts Lausitz, eastern Germany, and Lower Rhine are dealt with. A particular characteristic of the eastern German and Lausitz mining districts is that as the demand structure abruptly collapsed early in the 90s, closures became necessary on a large scale without preparatory measures having been taken. (orig.) [Deutsch] Mit dem vorliegenden Positionspapier wurde der Versuch unternommen, die Beeinflussungen vor, waehrend und nach dem Abbau von Braunkohle im Tagebaubetrieb inhaltlich zu erfassen und aus wasserwirtschaftlich-oekologischer Sicht verallgemeinernd zu bewerten. Dabei ist die From einzelner kurzgefasster Forderungen gewaehlt worden. Jede dieser Forderungen ist durch eine Erlaeuterung untersetzt. Um die Vielfalt der auftretenden Probleme zu verdeutlichen, werden beispielhaft in einem Anhang die grossen deutschen Braunkohlenreviere in der Lausitz, in Mitteldeutschland und am Niederrhein vorgestellt. Fuer das Mitteldeutsche und das Lausitzer Revier ist besonders anzumerken, dass mit dem schlagartigen Zusammenbruch der Bedarfsstruktur am Anfang der 90er Jahre in grossem Umfang Stillegungen ohne entsprechende Vorarbeiten notwendig wurden. (orig.)

  7. Theoretical study on safety assessment indexes system of coal mines

    Institute of Scientific and Technical Information of China (English)

    SHI Shi-liang(施式亮); LI Run-qiu(李润求); XIE Jian-xiang(谢建湘)

    2003-01-01

    The safety status of the coal mines is closely correlated with the operating status and its changes of the whole working system in the coal mines, and the safety system is the sub-system of the whole production system. In this paper, based on the analysis of the complicacy of the safety sub-system and its affecting factors, the theory basis of the indexes system of the safety assessment was studied, including the establishing principles of the indexes system , the structure of the indexes system, the determining methods of the assessment indexes. The complete indexes system was established for the safety assessment of the coal mines in the paper.

  8. Study on environmental effect of mining and utilizing radioactive bone-coal mine in Jiangxi province

    International Nuclear Information System (INIS)

    This paper introduces the method for investigating the γ-radiation level and annual average concentration of Rn inside and outside the houses built by the bone-coal cinder brick, and natural radionuclide level in bone-coal, bone-coal cinder, bone-coal cinder brick, soil in mining area and water discharging from the tunnel of bone-coal mine in the process of mining and utilizing bone-coal in Jiangxi province. Main results are reported, and additional doses to inhabitants living in bone-coal cinder brick houses in mining area are also calculated. The results show that: 1) γ radiation dose rates inside and outside the houses built by the bone-coal cinder brick in bone-coal mining area are 268 nGy/h and 278 nGy/h, respectively; 2) Annual average concentration of Rn in buildings constructed by the bone-coal cinder brick is 85.7 Bq/m3; 3) The contents of 238U and 226Ra are both 1.5 kBq/kg in bone-coal, about 0.9kBq/kg in bone-coal cinder and bone-coal cinder brick, and about 0.5 kBq/kg and 0.4 kBq/kg in soil in mining area, which are respectively 8.1 times and 6.4 times that in soil in Jiangxi province; 4) There are many associated toxic non-radioactive elements in bone-coal. The concentrations of Cu, Cd, Cr, Zn, As and F in bone-coal, bone-coal cinder, bone-coal cinder brick, soil in mining area are higher than local background values. Pollution of Cd and As is serious and the concentrations of Cd and As are 3.1 times and 1.4 times that of National Soil Environment Quality Standards (Level III); 5) The levels of U, Th, 226Ra, 40K in waste water discharging from the tunnel of bone-coal mine are 17.5 μg/L, 7.0 μg/L, 141 mBq/L and 333 mBq/L, respectively. 6) For inhabitants living in bone-coal cinder brick houses in mining area, annual average additional effective doses resulted from γ radiation and inhalation of 222Rn are 0.87 mSv and 1.0 mSv respectively, totally 1.9 mSv. 7) Most of bone-coal cinder might not be used in building material when its massic fraction is

  9. The Economic Impact of Coal Mining in New Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Peach, James; Starbuck, C.

    2009-06-01

    The economic impact of coal mining in New Mexico is examined in this report. The analysis is based on economic multipliers derived from an input-output model of the New Mexico economy. The direct, indirect, and induced impacts of coal mining in New Mexico are presented in terms of output, value added, employment, and labor income for calendar year 2007. Tax, rental, and royalty income to the State of New Mexico are also presented. Historical coal production, reserves, and price data are also presented and discussed. The impacts of coal-fired electricity generation will be examined in a separate report.

  10. Seventh symposium on coal mine drainage research. NCA/BCR coal conference and Expo IV

    Energy Technology Data Exchange (ETDEWEB)

    None

    1977-01-01

    The Seventh Symposium on Coal Mine Drainage Research, sponsored by the National Coal Association and Bituminous Coal Research, Inc., was held at the Kentucky Fair and Exposition Center, Louisville, Kentucky, October 18-20, 1977. Seventeen papers from the proceedings have been entered individually into EDB and ERA. Topics covered include chemical reactions of pyrite oxidation and acid formation in spoil banks, abandoned mines, etc., formation of small acid lakes from the drainage and their neutralization by natural and other neutralization measures, trace elements in acid mine drainage, ground water contamination, limnology, effects of surface mined ground reclamation and neutralization, water purification and treatment, mining and coal preparation plant waste disposal, ash and fly ash disposal (to minimize leaching from the wastes), runoff from large coal storage stockpiles during storms (prevention of environmental effects by collection and neutralization by passing through an ash pond). (LTN)

  11. Schemes for development and mining of level coal seams without leaving support coal pillars

    Energy Technology Data Exchange (ETDEWEB)

    Bakhtin, A.F.; Batmanov, Yu.K.; Taratuta, N.K.

    1982-07-01

    Methods are illustrated for longwall mining without leaving support pillars for strata control. Comparative evaluations in Soviet coal mines show that with increasing mining depth coal losses associated with support pillars increase. Use of support pillars also increases rock burst hazard and increases cost of support repairs in mine roadways. Proportion of coal from longwall mining without leaving coal support pillars increased from 36 % in 1976 to 52% in 1980. Two variants of longwall mining without support pillars are analyzed: with repeated use of longwall gate roads and without their repeated use. Comparative investigations show that longwall mining with the repeated use of the gates (one of the gate roads) is used in coal seams with the most convenient mining and geological conditions, whereas the second system is used under more difficult conditions. Schemes with repeated use are designed for thin coal seams, at a depth not exceeding 600 m, under conditions of stable roof and floor (when the floor consists of less stable rocks absence of water influx is the condition). Repeated use of gate roads is economical when, in spite of repeated gate road use, cost of support repair and maintenance is low. Fifteen schemes for longwall mining with and without repeated use of gateroads are compared. The results of evaluations are shown in a table. Recommendations on the most economical mining schemes are made.

  12. Characterization of seven United States coal regions. The development of optimal terrace pit coal mining systems

    Energy Technology Data Exchange (ETDEWEB)

    Wimer, R.L.; Adams, M.A.; Jurich, D.M.

    1981-02-01

    This report characterizes seven United State coal regions in the Northern Great Plains, Rocky Mountain, Interior, and Gulf Coast coal provinces. Descriptions include those of the Fort Union, Powder River, Green River, Four Corners, Lower Missouri, Illinois Basin, and Texas Gulf coal resource regions. The resource characterizations describe geologic, geographic, hydrologic, environmental and climatological conditions of each region, coal ranks and qualities, extent of reserves, reclamation requirements, and current mining activities. The report was compiled as a basis for the development of hypothetical coal mining situations for comparison of conventional and terrace pit surface mining methods, under contract to the Department of Energy, Contract No. DE-AC01-79ET10023, entitled The Development of Optimal Terrace Pit Coal Mining Systems.

  13. Model of environmental life cycle assessment for coal mining operations.

    Science.gov (United States)

    Burchart-Korol, Dorota; Fugiel, Agata; Czaplicka-Kolarz, Krystyna; Turek, Marian

    2016-08-15

    This paper presents a novel approach to environmental assessment of coal mining operations, which enables assessment of the factors that are both directly and indirectly affecting the environment and are associated with the production of raw materials and energy used in processes. The primary novelty of the paper is the development of a computational environmental life cycle assessment (LCA) model for coal mining operations and the application of the model for coal mining operations in Poland. The LCA model enables the assessment of environmental indicators for all identified unit processes in hard coal mines with the life cycle approach. The proposed model enables the assessment of greenhouse gas emissions (GHGs) based on the IPCC method and the assessment of damage categories, such as human health, ecosystems and resources based on the ReCiPe method. The model enables the assessment of GHGs for hard coal mining operations in three time frames: 20, 100 and 500years. The model was used to evaluate the coal mines in Poland. It was demonstrated that the largest environmental impacts in damage categories were associated with the use of fossil fuels, methane emissions and the use of electricity, processing of wastes, heat, and steel supports. It was concluded that an environmental assessment of coal mining operations, apart from direct influence from processing waste, methane emissions and drainage water, should include the use of electricity, heat and steel, particularly for steel supports. Because the model allows the comparison of environmental impact assessment for various unit processes, it can be used for all hard coal mines, not only in Poland but also in the world. This development is an important step forward in the study of the impacts of fossil fuels on the environment with the potential to mitigate the impact of the coal industry on the environment.

  14. Model of environmental life cycle assessment for coal mining operations.

    Science.gov (United States)

    Burchart-Korol, Dorota; Fugiel, Agata; Czaplicka-Kolarz, Krystyna; Turek, Marian

    2016-08-15

    This paper presents a novel approach to environmental assessment of coal mining operations, which enables assessment of the factors that are both directly and indirectly affecting the environment and are associated with the production of raw materials and energy used in processes. The primary novelty of the paper is the development of a computational environmental life cycle assessment (LCA) model for coal mining operations and the application of the model for coal mining operations in Poland. The LCA model enables the assessment of environmental indicators for all identified unit processes in hard coal mines with the life cycle approach. The proposed model enables the assessment of greenhouse gas emissions (GHGs) based on the IPCC method and the assessment of damage categories, such as human health, ecosystems and resources based on the ReCiPe method. The model enables the assessment of GHGs for hard coal mining operations in three time frames: 20, 100 and 500years. The model was used to evaluate the coal mines in Poland. It was demonstrated that the largest environmental impacts in damage categories were associated with the use of fossil fuels, methane emissions and the use of electricity, processing of wastes, heat, and steel supports. It was concluded that an environmental assessment of coal mining operations, apart from direct influence from processing waste, methane emissions and drainage water, should include the use of electricity, heat and steel, particularly for steel supports. Because the model allows the comparison of environmental impact assessment for various unit processes, it can be used for all hard coal mines, not only in Poland but also in the world. This development is an important step forward in the study of the impacts of fossil fuels on the environment with the potential to mitigate the impact of the coal industry on the environment. PMID:27092420

  15. The role of the state coal mining enterprise in Indonesia

    International Nuclear Information System (INIS)

    This paper reports that PT Tambang Batubara Bukit Asam is now becoming one of the 3 State Mining Enterprises in Indonesia which is dealing specifically with coal minings and their developments, while the other 2 are PT Tambang Timah for tin and PT Aneka Tambang for miscellaneous minerals. However, there are actually 3 other more State Enterprises under the umbrella of the Department of Mines and Energy, namely PERTAMINA which is dealing with oil and natural gas exploitation, PLN which is the State Electricity Corporation and the State Gas Corporation. The process of merging into one State Coal Mining Enterprise was only happening on October 30, 1990 by the issuance of the Government Regulation Number 56, 1991 whereby the then called Perum Tambang Batubara was merged into PT Tambang Batubara Bukit Asam, which was then operating only in Tanjung Enim, South Sumatra. The new scope of operation and management of the PT Tambang Batubara Bukit Asam is now including not only the management of coal mines at Tanjung Enim South Sumatra, but also the coal mines at Ombilin, West Sumatra and the supervision of all contract of works in coal which up to now amount to 11, mostly spread in East Kalimantan, South Kalimantan and one in West Sumatra. The amount of coal produced by PT Tambang Batubara Bukit Asam in 1990 was 4,854 million tons, while the coal production from all contract of works was 4,059 million tons for the same year

  16. Operation and manning of the Rietspruit opencast coal mine

    Energy Technology Data Exchange (ETDEWEB)

    McCracken, T.; Ive, J.I.

    1982-02-18

    Four coal seams, with a total thickness of 16 m, are in production at this opencast mine in the Transvaal; the first coal was mined in 1978. The overburden is stripped by three draglines, and the coal is worked with one shovel and three front-end loaders. Daily production capacity is 28 000 t of coal. The preparation plant has a rated throughput of 1750 t of run-of-mine coal per hour. 5 mt of coal were mined in 1981 and dispatched to Richards Bay, from where the coal is shipped to Western industrial nations. Some 200 million R were invested in the opencast mine, the preparation plant and the infrastructure. Company policy is much concerned with the training and education of the people on the mine; 25% of the personnel attended training courses last year. Pay categories are established in relation to the Peterson evaluation plan; jobs are graded from Group 1 (the lowest) to Group 15 (the grade of the General Manager). The current minimum wage is 214 to 231 R and is well above the living level and the cost of living. The employees live in Company one-family houses, or in bachelor accommodation in the case of unmarried employees. The quality of housing is exactly the same for Blacks and Whites. The housing estates include recreational facilities, sportsfields, a primary school, a clinic, a central restaurant and shops. The present article also gives details of leave entitlements and pensions.

  17. Application of 3D Visual Techniques in Daliuta Coal Mine

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    3D visualization is one of major problems in "Digital Mine" theory and its technological research field. Through the observation of 3D geological models, spatial structural information, connected with the information of production management hidden in geological data, could be detected. In order to meet the requirement of more efficient coal exploration, a case study of geological characters of the Daliuta Coal Mine is presented in which 3D visual models of the ground surface and geologic bodies are established on the basis of data models and data structures of 3D geology modeling. The main conclusions of this study are as follows: (1) Through analysis and organization of spatial discrete data, the drillhole database is designed with the data of the Daliuta mine; the connections amomg drillhole data are realized and displayed in a 3D environment. (2) Combining real data of the Daliuta mine, drillhole visualization is realized in a 3D environment by using the CoalMiner system. (3) The ground surface modeling of the Daliuta coal mine adopted a surface-data model and a TIN data structure. (4) 3D models of coal seams and rock formations of the Daliuta mine are established, which provide a method for the simulation of complex surfaces of geologic bodies. In the end, the models are applied to the Daliuta coal mine and the result shows that better geological effects are obtained.

  18. A Strategy for Coal Bed Methane and Coal Mine Methane Development and Utilization in China

    OpenAIRE

    Energy Sector Management Assistance Program

    2007-01-01

    China is short of clean energy, particularly conventional natural gas. The proven per capital natural gas reserve is only 1/12th of the world average. However, China has large coal bed methane (CBM) resources with development potential which can be recovered from surface boreholes independent of mining and in advance of mining, and also captured as a part of underground coal mining operati...

  19. Roof Rockmass Characterization in an Illinois Underground Coal Mine

    Science.gov (United States)

    Osouli, Abdolreza; Shafii, Iman

    2016-08-01

    Among all United States underground coal fields, those in Illinois have the highest rate of roof fall events due to their weak and severely moisture sensitive roof rock units. Rockmass characterization is the key initial step in designing safe and economical roof control measures in underground coal mines. In this study, a performance-based roof rockmass characterization is investigated. The geologic conditions as well as underground mine geographic specifications, roof fall analysis, mining method, utilized supplemental roof control measures, and geotechnical properties of roof rock units were considered to link the roof performance to rockmass characterization. The coal mine roof rating (CMRR) rockmass characterization method was used to evaluate the roof conditions and roof support design for an underground coal mine located in the Illinois Coal Basin. The results of several mine visit mappings, laboratory test results, and geotechnical issues and concerns are presented and discussed. The roof support designs are analyzed based on the rockmass characterization and are compared with the observed performance. This study shows that (1) CMRR index is a reasonable method for characterizing roof rockmass; (2) moisture sensitivity and bedding strengths in the horizontal direction are essential parameters for roof support design in mines with weak roof conditions; and (3) the applicability of the analysis of roof bolt system for roof support design of the studied mine is questionable.

  20. Ground engineering principles and practices for underground coal mining

    CERN Document Server

    Galvin, J M

    2016-01-01

    This book teaches readers ground engineering principles and related mining and risk management practices associated with underground coal mining. It establishes the basic elements of risk management and the fundamental principles of ground behaviour and then applies these to the essential building blocks of any underground coal mining system, comprising excavations, pillars, and interactions between workings. Readers will also learn about types of ground support and reinforcement systems and their operating mechanisms. These elements provide the platform whereby the principles can be applied to mining practice and risk management, directed primarily to bord and pillar mining, pillar extraction, longwall mining, sub-surface and surface subsidence, and operational hazards. The text concludes by presenting the framework of risk-based ground control management systems for achieving safe workplaces and efficient mining operations. In addition, a comprehensive reference list provides additional sources of informati...

  1. Brown coal mining and environment in the Rhineland

    Energy Technology Data Exchange (ETDEWEB)

    Schultze, H.J.

    1985-02-01

    Between the cities of Cologne and Aix-la-Chapelle, a brown coal deposit containing approx. 55 x 10/sup 9/ tonnes is extracted by means of open cast mining methods. The deposit is covered by aquiferous loose rock, which is to be drained before actual mining can start. The entire region is densely populated. In planning and mining, particular importance should be attached to the impact on the environment. Before coal mining starts, the surface has to be cleared. This means transfer of villages, relocation of streets, rivers and the like. As provided for by statute, the local authorities and the population to be transferred are consulted and asked for their ideas about mine planning and its subsequent implementation. With regard to the technical side, it is necessary to minimize dust and noise pollution. Refilling of the exhausted mines followed by proper reclamation schemes, in particular recultivation of agricultural land, is to make up for the land lost to mining.

  2. 露天开采新形势下《露天采矿学》教学模式%Exploration Into Teaching Pattern of" Open Pit Mining" Under New Situation

    Institute of Scientific and Technical Information of China (English)

    张亚宾; 甘德清; 陈超

    2012-01-01

    Open-pit mining plays a significant role in solid mineral deposit, 《 Open Pit Mining》is an important spe- cialized course of the major. On the basis of analyzing development trend of domestic open-pit mining technology, a new pattern is brought out. That is combining the process of teaching with development direction of open pit mining closely, enlarging teaching emphasis reasonably, cultivating indispensable talents for corporations and adjusting the practice in teaching of《Open Pit Mining》to the new situation.%露天开采在固体矿床开采中占有重要地位,《露天采矿学》是各类院校采矿专业重要的专业课程。在分析了国内露天开采采矿技术发展趋势的基础上,提出在高校采矿专业《露天采矿学》教学过程中应紧密结合露天开采的发展方向,合理增加授课重点,培养企业急需性人才,并调整实践教学环节,使《露天采矿学》的教学能适应当今露天开采新形势。

  3. Developing a model of strategic management of coal mining enterprises

    Directory of Open Access Journals (Sweden)

    Komissarova Maria Anatolievna

    2012-02-01

    Full Text Available In article problems of strategic management of the companies of ugledo-happening branch reveal, and the model of strategic management of the coal-mining enterprise taking into account their branch specificity is offered to consideration.

  4. High Resolution Seismic Reflection Survey for Coal Mine: fault detection

    Science.gov (United States)

    Khukhuudei, M.; Khukhuudei, U.

    2014-12-01

    High Resolution Seismic Reflection (HRSR) methods will become a more important tool to help unravel structures hosting mineral deposits at great depth for mine planning and exploration. Modern coal mining requires certainly about geological faults and structural features. This paper focuses on 2D Seismic section mapping results from an "Zeegt" lignite coal mine in the "Mongol Altai" coal basin, which required the establishment of major structure for faults and basement. HRSR method was able to detect subsurface faults associated with the major fault system. We have used numerical modeling in an ideal, noise free environment with homogenous layering to detect of faults. In a coal mining setting where the seismic velocity of the high ranges from 3000m/s to 3600m/s and the dominant seismic frequency is 100Hz, available to locate faults with a throw of 4-5m. Faults with displacements as seam thickness detected down to several hundred meter beneath the surface.

  5. Environmental pollution caused by coal mining and utilization in China

    International Nuclear Information System (INIS)

    After the BP Statistical Review of World Energy of 2010 45.6% of coal production and 46.9% of coal consumption in the world in 2009 are accounted for China. The large-scale coal production and use cause major environmental impacts. A large environmental impact is through the emission of some unavoidable reaction products (for example waste gas, waste heat) that affect and damage the ecosystem. A steady influence can lead to long-term climate changes and medium term damage to the ecosystem. Other environmental impacts occur during mining of coal by the change in the water balance and the transformation of the landscape (surface mining, spoil tips). The environmental problems caused by coal mining and utilization can not be ignored in China.

  6. Geological and mining factors affecting spontaneous heating of coal

    Energy Technology Data Exchange (ETDEWEB)

    Morris, R.; Atkinson, T.

    1986-04-01

    The authors define the phenomenon of spontaneous heating in underground coal mines as a combination of seam factor, geological factor and mining factor. These latter two factors are discussed in a practical manner from the early work of Fayol in 1879 through to the findings of modern day researchers. The paper assesses the significance of all relevant aspects affecting spontaneous heating of coal, and provides the basis for a better understanding of its complex causes. 7 figs., 24 refs.

  7. Capture and Use of Coal Mine Ventilation Air Methane

    Energy Technology Data Exchange (ETDEWEB)

    Deborah Kosmack

    2008-10-31

    CONSOL Energy Inc., in conjunction with MEGTEC Systems, Inc., and the U.S. Department of Energy with the U.S. Environmental Protection Agency, designed, built, and operated a commercial-size thermal flow reversal reactor (TFRR) to evaluate its suitability to oxidize coal mine ventilation air methane (VAM). Coal mining, and particularly coal mine ventilation air, is a major source of anthropogenic methane emissions, a greenhouse gas. Ventilation air volumes are large and the concentration of methane in the ventilation air is low; thus making it difficult to use or abate these emissions. This test program was conducted with simulated coal mine VAM in advance of deploying the technology on active coal mine ventilation fans. The demonstration project team installed and operated a 30,000 cfm MEGTEC VOCSIDIZER oxidation system on an inactive coal mine in West Liberty, WV. The performance of the unit was monitored and evaluated during months of unmanned operation at mostly constant conditions. The operating and maintenance history and how it impacts the implementation of the technology on mine fans were investigated. Emission tests showed very low levels of all criteria pollutants at the stack. Parametric studies showed that the equipment can successfully operate at the design specification limits. The results verified the ability of the TFRR to oxidize {ge}95% of the low and variable concentration of methane in the ventilation air. This technology provides new opportunities to reduce greenhouse gas emissions by the reduction of methane emissions from coal mine ventilation air. A large commercial-size installation (180,000 cfm) on a single typical mine ventilation bleeder fan would reduce methane emissions by 11,000 to 22,100 short tons per year (the equivalent of 183,000 to 366,000 metric tonnes carbon dioxide).

  8. Characteristics of mining uranium-bearing coal deposit in Mine No.509

    International Nuclear Information System (INIS)

    The author introduces the geological characteristics of uranium-bearing coal deposit in Mine No. 509 and safety protection in mining process. Moreover, it goes into detail on appropriate measures of developing, mining and safety protection, which ensure safety in high-efficient recovery of useful minerals

  9. Unsuccessful mining adventure. Dutch coal mining in Spitsbergen; Mislukt mijnavontuur. Nederlandse steenkoolwinning op Spitsbergen

    Energy Technology Data Exchange (ETDEWEB)

    Vrouwe, A.

    2008-12-19

    The Dutch mining company Nespico started mining coal in Spitsbergen in 1920. The arctic adventure failed, however, and in 1932 the company sold the mine to the Russians. [mk]. [Dutch] Het Nederlandse mijnbedrijf Nespico begon in 1920 met de winning van steenkool op Spitsbergen. Het arctische avontuur mislukte echter en in 1932 verkocht het bedrijf de mijn aan de Russen.

  10. 75 FR 20918 - High-Voltage Continuous Mining Machine Standard for Underground Coal Mines

    Science.gov (United States)

    2010-04-22

    ... From the Federal Register Online via the Government Publishing Office ] DEPARTMENT OF LABOR Mine Safety and Health Administration 30 CFR Parts 18 and 75 RIN 1219-AB34 High-Voltage Continuous Mining Machine Standard for Underground Coal Mines Correction In rule document 2010-7309 beginning on page...

  11. The assessment of mine rebound and decanting in deeper coal mines

    Energy Technology Data Exchange (ETDEWEB)

    Vermeulen, P.D.; Dennis, I. [Inst. for Groundwater Studies, Bloemfontein (South Africa)

    2010-07-01

    This groundwater and monitoring study of 7 interlinked deep coal collieries in South Africa was conducted to develop analytical and numerical decant models of individual collieries suitable for integration into a single large model. The model will be used to prevent acid mine drainage after mining activities have stopped. The models considered interconnectivity between the mines, the geology of the overburden, the type of mining conducted at each mine, the topography and depth of the mining activities, and the piezometric levels of the mines and involved aquifers. The overburden formations in the studied region consisted of sandstone, shale, interbedded siltstone, mudstone and coal seams. Removal of the coal seams has resulted in the caving of the overlying strata into mined voids. The mining disruptions have resulted in subsidence and recharges of between 5 and 7 percent. The conceptual decant model predicted that piezometric levels of the mine will rise with the storage coefficient value of the mine. The flux from the overlying aquifers will decrease as water levels even out. Any polluted water will need to overcome 4 bar of pressure to to decant. Excess water above the weathered zone in the mines will seep out as normal unpolluted springs at lower points. Results of the numerical modelling study showed that it is unlikely that the collieries will decant, as the piezometric level of the mines will rise with the storage coefficient value of the mine. 5 refs., 4 figs.

  12. Environmental Impact Assessment of Coal Mining: Indian Scenario

    Directory of Open Access Journals (Sweden)

    Sribas Goswami

    2014-09-01

    Full Text Available Coal mining is a development activity, which is bound to damage the natural ecosystem by all its activities direct and ancillary, starting from land acquisition to coal beneficiation and use of the products. This is so because environmental degradation has affected especially the common property resources such as land and water on which depend the subsistence and well-being of the local community. The study area being the foremost coal producing region of the country also ranked high in the record of environmentally degraded region. Huge areas in the Raniganj and Jharia coalfield in India have become ruined due to abandoned and active mine surface and underground mines. In open cast mines, waste resources are usually stacked as huge dumps in the surroundings. These, coupled with coal dumps, cause noteworthy visual impact. Large vicinity of forest, farming land, and pasture land has been transformed into colliery colonies or into uncultivated land due to rapid expansion of the coal mines. As a result, land use pattern has been changed considerably over last three decades. This study is pursued to assess the impact of coal mining activities on local community and environment.

  13. Coal mine safety regulation in China and the USA

    Energy Technology Data Exchange (ETDEWEB)

    Homer, A.W. [Tulane University, New Orleans, LA (United States). School of Law

    2009-07-01

    The People's Republic of China (PRC) and the USA are, by long measure, the world's largest producers and consumers of coal. Coal production is inherently risky, and fatalities are unavoidable in these large coal economies. Both countries have developed complex systems of law to regulate coal mine safety. These systems share many attributes. Despite similarities between the separate systems of mining law, the PRC significantly trails the USA in terms of coal mine safety. Due to large disparity in economic development, it may be inappropriate to compare these two countries. However, the PRC's mine safety record is significantly worse than that of other large producers who are similarly underdeveloped. It appears that the PRC has failed to effectively implement its mining safety laws. Several arguments have been made as to the cause of this failure, including lack of judicial review of agency actions, lack of meaningful trade unions, government corruption and geographical difficulties of controlling rural mines with a central government. This article explores similarities and differences between the coal economies of the USA and PRC, and introduces some of the arguments used to explain the gap in safety.

  14. Trust and safety in the coal mining sector

    Energy Technology Data Exchange (ETDEWEB)

    Neil Gunningham; Darren Sinclair [Gunningham and Associates (Australia)

    2008-08-15

    This report examines the relationship between trust (and mistrust) and occupational health and safety (OHS) in the Australian coal mining sector. Previous research in Australian coal mining companies indicated that mistrust is deep-seated at a number of mines, and that these mines are usually the worst performers in terms of OHS. Mistrust also handicaps the ability of inspectors to worker together with mines sites to improve OHS outcomes. Given this, there is a compelling need to understand how mistrust comes about, and to identify practical steps that can be adopted by companies, mines sites and the inspectorate to foster the development of trust. The report builds on these earlier findings by investigating trust in a much more detailed and sophisticated fashion, drawing on an in-depth analysis at mines, across a number of coal mining companies, and in two state jurisdictions. Research revealed that a 'cluster of characteristics' are associated with the formation and maintenance of mistrust at mines with a lower OHS track-record. These findings, together with an analysis of the characteristics of mines with better OHS outcomes, enabled the report to outline a variety of ways in which mines may build trust within and between management and the workforce. It also considers the at times fractious relationship between trade unions and management, and flags some of the challenges confronting these two groups in working together to improve OHS performance in the coal mining sector. Finally, the report examines the rise and impact of mistrust on the operations of the New South Wales and Queensland inspectorates, and suggests ways in which a fairer and more just enforcement policy may help foster greater trust between inspectors and mines.

  15. [Occupational morbidity among coal miners in the RSFSR].

    Science.gov (United States)

    Borisenkova, R V; Gvozdeva, L L; Stepanov, S A

    1991-01-01

    Analysis of occupational morbidity for 1982-1989 in coal extraction industry workers in the Russian Federation showed its high-level detection in coal-miners. Revealed was a decrease in dust-induced occupational diseases and a greater detection of vibration disease cases, which accounted for 50% in the occupational diseases' structure. In miners, vibration disease cases occurred equally often in coal mine face-workers and driving team workers. The face-workers also exhibited dust-induced diseases and locomotor system disorders. In open pit mines and coal-refining plants, occupational pathology cases were only sporadic. Detectability of occupational morbidity cases was highest in the Rostov Region, Kemerovo, Far-East and Komi coal mines. The performed analysis revealed factors which influence most of all the prevalent forms of occupational pathology, thus laying the basis for the elaboration of health improvement measures. PMID:1839012

  16. Fugitive coal mine methane emissions at five mining areas in China

    Science.gov (United States)

    Su, Shi; Han, Jiaye; Wu, Jinyan; Li, Hongjun; Worrall, Rhys; Guo, Hua; Sun, Xin; Liu, Wenge

    2011-04-01

    Large quantities (about 28 billion m 3) of methane are released to the atmosphere every year from coal-mining activities around the world. This methane represents not only a significant greenhouse gas that is contributing to global temperature change, but is also a wasted energy resource. China, the largest coal producer in the world, is responsible for over 50% of the total global release of methane-containing ventilation air from coal mines. A mine site investigation methodology was developed for collecting reliable methane emission data from coal mines. Five main coal-mining areas in China were studied and specific data were collected from two mines in each of the five mining groups. Information such as coal and methane reserves, ventilation air released, methane concentration and methane release rates were collected. Future development plans were evaluated and used to estimate potential future emissions. It was determined that most of the methane generated in the five mining areas is currently released to the atmosphere.

  17. 30 CFR 816.87 - Coal mine waste: Burning and burned waste utilization.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 3 2010-07-01 2010-07-01 false Coal mine waste: Burning and burned waste utilization. 816.87 Section 816.87 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT...-SURFACE MINING ACTIVITIES § 816.87 Coal mine waste: Burning and burned waste utilization. (a) Coal...

  18. 30 CFR 817.87 - Coal mine waste: Burning and burned waste utilization.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 3 2010-07-01 2010-07-01 false Coal mine waste: Burning and burned waste utilization. 817.87 Section 817.87 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT...-UNDERGROUND MINING ACTIVITIES § 817.87 Coal mine waste: Burning and burned waste utilization. (a) Coal...

  19. 77 FR 58170 - Proposed Renewal of Existing Information Collection; Fire Protection (Underground Coal Mines)

    Science.gov (United States)

    2012-09-19

    ... (Underground Coal Mines) AGENCY: Mine Safety and Health Administration, Labor. ACTION: Request for public... (facsimile). SUPPLEMENTARY INFORMATION: I. Background Fire protection standards for underground coal mines....1100 requires that each coal mine be provided with suitable firefighting equipment adapted for the...

  20. Numerical Simulation of Squeezing Failure in a Coal Mine Roadway due to Mining-Induced Stresses

    Science.gov (United States)

    Gao, Fuqiang; Stead, Doug; Kang, Hongpu

    2015-07-01

    Squeezing failure is a common failure mechanism experienced in underground coal mine roadways due mainly to mining-induced stresses, which are much higher than the strength of rock mass surrounding an entry. In this study, numerical simulation was carried out to investigate the mechanisms of roadway squeezing using a novel UDEC Trigon approach. A numerical roadway model was created based on a case study at the Zhangcun coal mine in China. Coal extraction using the longwall mining method was simulated in the model with calculation of the mining-induced stresses. The process of roadway squeezing under severe mining-induced stresses was realistically captured in the model. Deformation phenomena observed in field, including roof sag, wall convexity and failed rock bolts are realistically produced in the UDEC Trigon model.

  1. Development of a Universal Safety Behavior Management System for Coal Mine Workers

    OpenAIRE

    LI, Jizu; Li, Yuejiao; Liu, Xiaoguang

    2015-01-01

    Background: In China, over 80% of all work-related deaths in the mining industry occur in coal mines and human factors constitute 85% of the direct causes of coal mine accidents, which indicates that significant shortcomings cur-rently exist in the safety behavior management of Chinese coal mine workers. We aimed to verify the impact of human psychological behavior in coal mine accidents systematically through experimental study, theoretical analysis and man-agement application.Methods: Four ...

  2. High resolution processing of 3D seismic data for thin coal seam in Guqiao coal mine

    Science.gov (United States)

    Li, Qiaoling; Peng, Suping; Zou, Guangui

    2015-04-01

    Accurate identification of small faults for coal seams is very important for coal-field exploration, which can greatly improve mining efficiency and safety. However, coal seams in China are mostly thin layers, ranging from 2-5 m. Moreover, the shallow coal seam with strong reflection forms a shield underneath thin coal seam which is only about 40 m deeper. This causes great difficulty in seismic processing and interpretation. The primary concern is to obtain high-resolution seismic image of underneath thin coal seam for mining safety. In this paper, field data is carefully analyzed and fit-for-purpose solutions are adopted in order to improve the quality of reprocessed data and resolution of target coal seam. Identification of small faults has been enhanced significantly.

  3. Study on durability of concrete in coal mine

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Y.; Jin, Z.; Sun, W.; Guan, X. [Henan Polytechnic University, Jiaozuo (China). Dept. of Resource and Material

    2004-12-01

    There are sulfate and chloride ions corrosion and carbonation of concrete in coal mine. Based on taking test of accelerated carbonation, corrosion of 3.5% weight of NaCl solution and 5% weight of Na{sub 2}SO{sub 4} solution of coal mine concretes, durability of concretes which include spray concrete of C20, high performance concretes of C30 and C50 and effect of fly ash on durability have been studied. Results suggest that the coal mineral high performance concretes show good resistance capacities of carbonation, and sulfate and chloride corrosion to meet the coal mine construction. Moreover, fly ash improves resistance capacity of high performance concrete (HPC) to chloride and sulfate but decreases the resistance capacity of C30's to carbonation and average dynamic modulus. 9 refs., 4 figs., 1 tab.

  4. Simulating the Various Subsystems of a Coal Mine

    Directory of Open Access Journals (Sweden)

    V. Okolnishnikov

    2016-06-01

    Full Text Available A set of simulation models of various subsystems of a coal mine was developed with the help of a new visual interactive simulation system of technological processes. This paper contains a brief description of this simulation system and its possibilities. The main possibilities provided by the simulation system are: the quick construction of models from library elements, 3D representation, and the communication of models with actual control systems. These simulation models were developed for the simulation of various subsystems of a coal mine: underground conveyor network subsystems, pumping subsystems and coal face subsystems. These simulation models were developed with the goal to be used as a quality and reliability assurance tool for new process control systems in coal mining.

  5. Study on durability of concrete in coal mine

    Institute of Scientific and Technical Information of China (English)

    ZHANG Yi-shun; JIN Zu-quan; SUN Wei; GUAN Xue-mao

    2004-01-01

    There are sulfate and chloride ions corrosion and carbonation to concrete in coal mine. Based on taking test of accelerated carbonation, corrosion of 3.5% weight of NaCl solution and 5% weight of Na2SO4 solution of coal mine concretes, durability of concretes which include spray concrete of C20, high performance concretes of C30 and C50and effect of fly ash on durability have been studied. Results suggest that the coal mineral high performance concretes show good resistance capacities of carbonation, sulfate and chloride corrosion to meet the coal mine construction. And the higher the strength grade is,the better the resistance capacity of corrosion of carbonation is, chloride and sulfate.Moreover, fly ash improves resistance capacity of high performance concrete(HPC) to chloride and sulfate but decreases the resistance capacity of C30's to carbonation and average dynamic modulus.

  6. RECULTIVATION AND SUSTAINABLE DEVELOPMENT OF COAL MINING IN KOLUBARA BASIN

    Directory of Open Access Journals (Sweden)

    Ivica M Ristović

    2010-01-01

    Full Text Available Coal plays a fundamental role in global development, but the coal mining industry exerts impact on the environment, society and economy. Kolubara Coal Company produces about 30 million tonnes of coal, and digs about 70 million m3 of overburden per year. The main result of surface coal is certainly taking agricultural land, so that surface mines, which affect large areas in Kolubara, about 100 hectars a year, causing a number of problems related to the recultivation of degraded area after coal extraction. The lignite extraction through the method of opencast mining in Kolubara is about 60 years old. The previous exploitation usage is characterised by the fact that the disposal of overburden is made non-selectively, whereas the surface solum is not being preserved. The recultivation is carried out in parallel with overburden excavation. It is necessary to preserve the fertile solum through selective excavation in order to bring the soil back to its previous purpose - agricultural production. The objective of this paper is mainly to point out the need for the further expansion of the utilisation of fossil fuels, which in turn reduces the emission of CO2, and thus reduces or prevents global climate changes on Earth. In addition to that, bringing back deteriorated terrains to their previous purpose - agricultural production, or the afforestation - contributes to the maintenance of ecological balance in nature, which then makes coal mining sustainable.

  7. Application of fuzzy logic for determining of coal mine mechanization

    Institute of Scientific and Technical Information of China (English)

    HOSSEINI SAA; ATAEI M; HOSSEINI S M; AKHYANI M

    2012-01-01

    The fundamental task of mining engineers is to produce more coal at a given level of labour input and material costs,for optimum quality and maximum efficiency.To achieve these goals,it is necessary to automate and mechanize mining operations.Mechanization is an objective that can result in significant cost reduction and higher levels of profitability for underground mines.To analyze the potential of mechanization,some important factors such as seam inclination and thickness,geological disturbances,seam floor conditions and roof conditions should be considered.In this study we have used fuzzy logic,membership functions and created fuzzy rule-based methods and considered the ultimate objective:mechanization of mining.As a case study,the mechanization of the Tazare coal seams in Shahroud area of Iran was investigated.The results show a low potential for mechanization in most of the Tazare coal seams.

  8. Determination of coal mine mechanization using fuzzy logic

    Institute of Scientific and Technical Information of China (English)

    Ataei M; Khalokakaei R; Hossieni M

    2009-01-01

    Two of the most important tasks in coal mines are to improve efficiency and to increase production besides keeping safety constantly in mind. In order to obtain these goals, mine mechanization is required. Mine mechanization needs high levels of investment and should therefore be studied carefully before final decisions about mechanization are made. When analysizing the potential for mechanization the following, rather imprecise, factors should be considered: seam inclination and thickness, geologi-cal disturbances, seam floor conditions, roof conditions, water at the working face and the extension of seams. In our study we have used fuzzy logic, membership functions and created fuzzy rule - based methods and to considered the ultimate objective: mechanization of mining. As a case study, the mechanization of the Takht coal seams in Iran was investigated. The results show a high potential for mechanization in most of the Takht coal seams.

  9. Optimum division of the Kosovo coal basin into mining coal fields

    Energy Technology Data Exchange (ETDEWEB)

    Perisic, M.; Simonovic, M.

    1982-10-01

    The paper discusses a large scale study made by a team of Yugoslav experts in order to determine the optimum development plan of the Kosovo coal deposit. Over an area of 265 km/sup 2/ a coal seam with an average thickness of 40 m containing 20 billion tons of lignite with favorable coal to overburden ratio will be exploited during the next 30-40 years by surface mining. The exploitation of this coal deposit requires exact planning in order to avoid large scale devastation and environmental pollution and in order to achieve optimum utilization of the coal deposit. Particular attention was paid to the exact estimation of minable coal reserves, determination of geological, geomechanical, tectonic, hydrogeological and other properties of the coal deposit and to rational division of the coal deposit into mining fields as well as to optimum sequence of single mine field exploitation. Given are data concerning the forecast annual production of the mine, choice of excavators, conveyors and other equipment which will be employed. Recultivation of devasted surface mine area, establishment of a convenient information system, data base and electronic data processing has also been considered in the study.

  10. Microbial methane formation from hard coal and timber in an abandoned coal mine

    Energy Technology Data Exchange (ETDEWEB)

    Kruger, M.; Beckmann, S.; Engelen, B.; Thielemann, T.; Cramer, B.; Schippers, A.; Cypionka, H. [Federal Institute for Geoscience and Natural Resources BGR, Hannover (Germany)

    2008-07-01

    About 7% of the global annual methane emissions originate from coal mining. Also, mine gas has come into focus of the power industry and is being used increasingly for heat and power production. In many coal deposits worldwide, stable carbon and hydrogen isotopic signatures of methane indicate a mixed thermogenic and biogenic origin. In this study, we have measured in an abandoned coal mine methane fluxes and isotopic signatures of methane and carbon dioxide, and collected samples for microbiological and phylogenetic investigations. Mine timber and hard coal showed an in-situ production of methane with isotopic signatures similar to those of the methane in the mine atmosphere. Enrichment cultures amended with mine timber or hard coal as sole carbon sources formed methane over a period of nine months. Predominantly, acetoclastic methanogenesis was stimulated in enrichments containing acetate or hydrogen/carbon dioxide. Molecular techniques revealed that the archaeal community in enrichment cultures and unamended samples was dominated by members of the Methanosarcinales. The combined geochemical and microbiological investigations identify microbial methanogenesis as a recent source of methane in abandoned coal mines.

  11. Study of "3-Step Mining" Subsidence Control in Coal Mining Under Buildings

    Institute of Scientific and Technical Information of China (English)

    GUO Guang-li; ZHA Jian-feng; WU Bin; JIA Xin-guo

    2007-01-01

    Mining subsidence damage is the main factor of restricting coal mining under buildings. To control or ease effectively the degree of mining subsidence and deformation is essential to resolve this problem. Through analyzing both advantages and disadvantages of some technologies such as mining with stowing, partial extraction and grouting in separated beds of overburden, we used the principle of load replacement and propose a "3-step mining" method, a new pattern of controlling mining subsidence, which consists of: strip mining, i.e. grouting to fill and consolidate the caving zone and retained strip pillar mining. The mechanism of controlling mining subsidence by using the "3-step mining" pattern is analyzed. The effect of the control is numerically simulated. The preliminary analysis shows that the "3-step mining" can effectively control ground subsidence and deformation. By using this method, the ground subsidence factor can be controlled to a value of about 0.25. Coal recovery can reach 80%-90%. Coal mining without removing surface buildings can be realized and the economic loss resulting from ground subsidence can be greatly reduced.

  12. Effect of mining and utilizing bone coal on environment

    International Nuclear Information System (INIS)

    The average air γ-ray dose rates measured from the field, road, bone coal, bone coal cinder and bone coal cinder bricks in the three bone coal mines in west Zhejiang Province, are 3.8 x 102, 4.1 x 102, 7.1 x 102, 4.0 x 102 and 7.1 x 102 nGy/h, respectively. The mean contents of 238U, 226Ra, 232Th and 40K in the bone coal of the three bone coal mines are 2.0 x 103, 2.1 x 103, 3.9 x 101 and 6.1 x 102 Bq/kg, respectively, in the bone coal cinder (BCC) are 1.6 x 103, 1.6 x 103, 2.3 x 101 and 4.5 x 102 Bq/kg, respectively, and in the bone coal cinder brick (BCCB) are 1.2 x 103, 1.2 x 103, 2.4 x 101 and 4.0 x 102 Bq/kg, respectively, and those in the reference soil are 3.4 x 102, 1.0 x 102, 4.9 x 101 and 4.9 x 102 Bq/kg, respectively. The annual mean of effective dose equivalent for public living in house buildings made with BCCB near the three mines is 6.8 mSv

  13. Ecological assessment of coal mine and metal mine drainage in South Korea using Daphnia magna bioassay

    OpenAIRE

    Lee, Sang-Ho; Kim, Injeong; Kim, Kyoung-Woong; Lee, Byung-Tae

    2015-01-01

    In order to assess the ecological effect of acid mine drainage, metal mine (Dalsung) and coal mine (Samtan) drainage in South Korea were collected. The each mine drainage then investigated by whole effluent toxicity test (WET) and toxicity identification evaluation (TIE). WET results demonstrated that DS leachate and ST mine water is more toxic than other mine drainage due to the presence of cationic metals and acidic pH. TIE results revealed that the acidic pH and copper (Cu) could be the ma...

  14. Coal Fields - MO 2015 Closed Non-coal Mine Shafts (SHP)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This data set contains the locations and descriptions of abandoned non-coal mine shafts in Missouri closed by the Missouri Department of Natural Resources (DNR),...

  15. 78 FR 35974 - Proposed Information Collection; Comment Request; Coal Mine Rescue Teams; Arrangements for...

    Science.gov (United States)

    2013-06-14

    ... Safety and Health Administration Proposed Information Collection; Comment Request; Coal Mine Rescue Teams... protecting the safety and health of miners. 30 CFR Part 49, Mine Rescue Teams, Subpart B--Mine Rescue Teams for Underground Coal Mines, sets standards related to the availability of mine rescue teams;...

  16. Mined land in the Ruhr area: Geological assessments to bound the environmental consequences of coal mining

    International Nuclear Information System (INIS)

    The extraction, transportation, and processing of coal has severe environmental impacts. The development of the highly mechanized underground mining has resulted in the displacement of very large quantities of coal and waste rock at the surface and underground. This has led to land subsidence, changes in groundwater flow, soil erosion, air pollution, and local climatic effects. Thus, in the Ruhr area more than 4,000 km2 is subject to subsurface mass displacement. The surface undergoes a mobile trough-shaped subsidence. The resulting deformations produce a range of different effects on geomorphology and hydrology/geohydrology. Abandoned coal mines have to be taken under long term drainage, pumping stations have to regulate the groundwater levels. The devastated areas have to be restored, hazardous waste materials from mining activities must be treated, and the long term risks of coal mining must be assessed as part of long range planning and the protection of natural resources. (orig./HP)

  17. Influence of different mining layouts on the mechanical properties of coal

    Institute of Scientific and Technical Information of China (English)

    Xie; Heping; Zhao; Xiaoping; Liu; Jianfeng; Zhang; Ru; Xue; Dongjie

    2012-01-01

    Non-pillar mining,top-coal caving and protected coal seam mining are the most popular mining methods in coal exploitation,and the different mining layouts will change the stress state and failure mechanism of coal in front of the working face.In this paper,mining-induced mechanical behaviors under three mining layouts have been simulated in the laboratory to investigate the effects of mining layouts on the deformation and strength of coal.Furthermore,the coal failure mechanism under different mining layouts is analyzed microscopically.The experimental results indicate that the stage characteristics of the coal deformation are obvious.Under the serial action of non-pillar mining,top-coal caving and protected coal seam mining layouts,the values of radial deformation,volume strain and Poisson's ratio increase,while the peak strength and deformation modulus decrease at the same buried depth,and the peak strength under non-pillar mining,top-coal caving and protected coal seam mining is about 3.0,2.5 and 2.0 times of the initial confining pressure,respectively.The results also indicate that the trend of the coal deformation decreases with the increase of the buried depth under the same mining layout,while the strength and deformation modulus increase,and the failure mechanism under three mining layouts is dominated with shear/tensile failure.

  18. Influence Of different mining layouts on the mechanical properties of coal

    Institute of Scientific and Technical Information of China (English)

    Xie Heping; Zhao Xiaoping; Liu Jianfeng; Zhang Ru; Xue Dongjie

    2012-01-01

    Non-pillar mining,top-coal caving and protected coal seam mining are the most popular mining methods in coal exploitation,and the different mining layouts will change the stress state and failure mechanism of coal in front of the working face.In this paper,mining-induced mechanical behaviors under three mining layouts have been simulated in the laboratory to investigate the effects of mining layouts on the deformation and strength of coal.Furthermore,the coal failure mechanism under different mining layouts is analyzed microscopically.The experimental results indicate that the stage characteristics of the coal deformation are obvious.Under the serial action of non-pillar mining,top-coal caving and protected coal seam mining layouts,the values of radial deformation,volume strain and Poisson's ratio increase,while the peak strength and deformation modulus decrease at the same buried depth,and the peak strength under non-pillar mining,top-coal caving and protected coal seam mining is about 3.0,2.5 and 2.0 times of the initial confining pressure,respectively.The results also indicate that the trend of the coal deformation decreases with the increase of the buried depth under the same mining layout,while the strength and deformation modulus increase,and the failure mechanism under three mining layouts is dominated with shear/tensile failure.

  19. Database on nuclide content of coal and gangue in Chinese coal mines

    International Nuclear Information System (INIS)

    The designing ides, structure, interface and basic function of a database are introduced of nuclide content of coal or gangue in Chinese coal mine. The design of the database adopts Sybase database system, and the database has the functions of making inquiries of keyword, classification and statistics, printing, data input which are achieved by using Power builder Language program. At the present, in this database, the data are collected on the radioactivity of natural radionuclide of 2043 coal, gangue and the other relative samples from various coal miners of all over the country. The database will provide the basic data for the environmental impact assessment of Chinese coal energy. (authors)

  20. Investigation of Bowen Basin coal mine fire gas analysis parameters

    Energy Technology Data Exchange (ETDEWEB)

    Cliff, D.; Bell, S.; O' Beirne, T. (ACIRL Ltd., North Ryde, NSW (Australia))

    1991-12-01

    Laboratory analysis of seven currently mined Bowen Basin coals has validated the use of carbon monoxide as the best indicator of the very early states of coal heating. As a primary warning indicator, other gases are rarely appropriate as they are emitted in such small quantities to make then very difficult to detect when diluted with typical mine ventilation quantities. Once a heating is suspected or confirmed, other gases and their various relationships can now be more confidently used to indicate peak temperatures and the progress of the heating. Interestingly, the order of evolution of many gases, from the Bowen Basin coals is quite different from overseas coals (as reported in the literature) and this impacts on the usefulness of many overseas generated interpretation techniques. All of the commonly used techniques for interpreting the status of a heating have been reviewed in the light of the research. These interpretative tools have very real limitations which have now been more clearly defined. The research has also demonstrated the need for accurate definitive mine gas analysis at the mine site. A fire ladder has been developed to enable the assessment of the heating coal temperature. The practical value of this research, as indicated above, needs to be concisely disseminated to industry. This should impact on the operation of mine environmental monitoring systems, and particularly on any software used to analyse gas results.

  1. Environmentally Benign Coal Mining: Target One Billion Tonne Coal Production by CIL by 2019-20

    Directory of Open Access Journals (Sweden)

    Gurdeep Singh1,2 and

    2016-08-01

    Full Text Available Coal is the most abundant fuel resource in India. Coal is the major source of energy and is the principal contributor for the industrial growth of the developing nation like India. Coal is a bridge component in a current, balanced energy group. It is connection for the future as a vital low cost energy solution for achieving sustainability challenges for competing with the developed countries. The largest consumer of coal in India is power sector, and the industrial sector is coming next to power sector. The major consumption of coal in India is in steel plant, cement plant and brick-manufacturing units.52%of primary energy is coal dependent1.About 66% of India's power generation is based upon coal production1. While coal is considered the most significant element for the growth of country, it faces major and massive social and environmental issues. Environmental worries are the most important parameter for the coal industry’s future. In comparison to the other fossil fuels, coal is more pollution causing and less energy efficient. Coal has an important role in fulfillment of current needs. 212.10 Million Tonnes of coal was imported in the financial year 2014-152.The coal demand will be increasing due to increase in electricity demand of the country. Coal India being the largest producer of coal in India has to plan accordingly to fulfill the coal demand of country. A road map for enhancement of coal production up to 1 Billion of coal by 2019-2020 has been prepared by Coal India3. Due to coal mining the key environmental impacts are on air, water, land, forest, biodiversity, and climate etc. The biggest challenge is to put on the innovative technologies in the most efficient and environmentally friendly manner and to solve social issues by taking care of the implementation of rehabilitation and resettlement (R&R.Thrust is now to promote inclusive growth of mining areas by adequate corporate social responsibilities (CSR activities4,5. Thus the

  2. Preliminary report on LLNL mine seismicity deployment at the Twentymile Coal Mine

    International Nuclear Information System (INIS)

    This report summarizes the preliminary results of a just completed experiment at the Twentymile Coal Mine, operated by the Cyprus Amax Coal Company near Oak Creek, CO. The purpose of the experiment was to obtain local and regional seismic data from roof caves associated with long-wall mining activities and to use this data to help determine the effectiveness with which these events can be discriminated from underground nuclear explosions under a future Comprehensive Test Ban Treaty

  3. The accident analysis of mobile mine machinery in Indian opencast coal mines.

    Science.gov (United States)

    Kumar, R; Ghosh, A K

    2014-01-01

    This paper presents the analysis of large mining machinery related accidents in Indian opencast coal mines. The trends of coal production, share of mining methods in production, machinery deployment in open cast mines, size and population of machinery, accidents due to machinery, types and causes of accidents have been analysed from the year 1995 to 2008. The scrutiny of accidents during this period reveals that most of the responsible factors are machine reversal, haul road design, human fault, operator's fault, machine fault, visibility and dump design. Considering the types of machines, namely, dumpers, excavators, dozers and loaders together the maximum number of fatal accidents has been caused by operator's faults and human faults jointly during the period from 1995 to 2008. The novel finding of this analysis is that large machines with state-of-the-art safety system did not reduce the fatal accidents in Indian opencast coal mines.

  4. Simulation Of Mine Water Inflow: Case Study Of The Štavalj Coal Mine (Southwestern Serbia)

    Science.gov (United States)

    Miladinović, Branko; Vakanjac, Vesna Ristić; Bukumirović, Dragomir; Dragišić, Veselin; Vakanjac, Boris

    2015-12-01

    The inflow of mine water to mining operations is often caused by random events such as precipitation. Consequently, the mine water inflow regime can be defined as a function of random events applying the theory of random processes. Regression models of the multiple linear correlation type have been used to simulate the inflow of mine water into mining operations, produce short-range predictions and facilitate rapid response inside the mine. The significance of such models lies in the ability to simulate and predict the consequences (mine water inflow), caused by events of a random nature (meteorological parameters: precipitation and air temperature). The presented prognostic models have been calibrated for mine water inflow to the Štavalj Coal Mine in southwestern Serbia. Mathematical dependencies were defined based on daily mine water inflow rates recorded during the period from 2003 to 2011, which can be used to generate short-range (1-7 day) predictions of mean daily mine water inflow rates to the Štavalj Coal Mine. A strong correlation (coefficient of correlation r = 0.93, Sig. = 0.00) was derived for the one-day forecast. The coefficients of correlation for predictions of mean daily mine water inflow rates related to time periods of two, three...seven days gradually declined to 0.63 (7-day mean daily inflow rate).

  5. Environmental problems in a coal mining area affected by coal fires --A case study in Ruqigou Coalfield, Ningxia, China

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    Ruqigou Coalfield, being one of the most important coal mining areas in China, has suffered coal fire problems for more than one hundred years. Due to coal fires, about 4.513 million tons coal resources has been lost each year, and apart from a large volume of CO2 delivered into air, environmental problems such as land degradation, land pollution and air pollution are also produced. Air pollution, as one related to coal fires, is the most dangerous problems for local people and has already led to vegetation pollution in this area. Land degradation is mainly induced with occurrence of land subsidence, fissures with due to coal mining/coal fires, and debris slide/flow. With development of opencast coal mining, a large volume of waste was produced, which is the major source of land pollution. All these environmental problems are associated with coal mining or coal fires and their comprehensive effects are deterioration of environment.

  6. Environmental protection at the Belchatow brown coal mine

    Energy Technology Data Exchange (ETDEWEB)

    Wasowicz, J.; Ozog, J.

    1987-01-01

    Discusses environmental effects of brown coal surface mining in Belchatow. Mine construction started in 1975. In 1985 coal output had increased to 18.0 Mt/a, coal calorific value was 1,860 kcal/kg. A system of 345 wells was used for mine draining. Drawdown cone radius ranged from 34.0 to 13.4 km, drawdown area was 445.5 km/sup 2/. Sedimentation tanks with a total capacity of 290,337 m/sup 3/ were used for waste water treatment. In the initial phase of mine development air pollution was relatively low. Air pollution will increase after a coal-fired power plant is constructed. Damage caused by surface mining in the mine area is associated with drawdown and earth tremors (caused by overburden removal and its disposal in new areas). Two land reclamation trends in Belchatow are comparatively evaluated: reforestation and agriculture. The average land reclamaton cost was 4.2 million zlotys/ha. Organizations which coordinate environmental control and land reclamation in Belchatow are listed.

  7. Selective bibliography of surface coal mining and reclamation literature. Volume 2. Interior Coal Province

    Energy Technology Data Exchange (ETDEWEB)

    Patricoski, M. L.; Daniels, L. K.; Sobek, A. A.

    1979-08-01

    This bibliography has been compiled for use by researchers, students, and other groups who need a reference source of published literature related to surface coal mining and reclamation in the Interior Coal Province. This bibliography contains more than 1300 references, including government reports, journal articles, symposium proceedings, industrial reports, workshop proceedings, theses, and bibliographies. A simple format was used to categorize citations.

  8. Exploration drilling for pre-mining gas drainage in coal mines

    International Nuclear Information System (INIS)

    High natural gas content in coal seams and low gas drainage efficiency are the basic issues to be addressed in order to ensure coal mining safety. A great number of wells being drilled within various gas drainage techniques significantly increase the costs of coal mining and do not reduce the gas content levels within the coal beds up to the required parameters in a short period of time. The integrated approach toward exploration well spacing applied at the stage of project development could make it possible to consider coal seam data to provide more effective gas drainage not only ahead of mining but also during further gas content reduction and commercial production of methane. The comparative analysis of a closely spaced grid of exploration program compiled in accordance with the recommendations on applying mineral reserves classification and inferred resources of coal and shale coal deposits and currently effective stimulation radius proves the necessity and possibility to consider exploration well data for gas drainage. Pre-mining gas drainage could ensure the safety of mining operations

  9. Study of radioactivity effect of mining and utilizing bone-coal mine on environment

    International Nuclear Information System (INIS)

    The development and utilization of the bone-coal is a man-made activity that may bring a important effect on the environment around the mine and on radiation dose of public living in the mine area. The paper introduces investigation methods and main results about the pollution source term of bone-coal, which was caused by mining and utilizing in Hubei, Hunan, Jiangxi, Zhejiang and Anhui provinces. The store amount of bone-coal in five provinces is above 90% of the total store amount in our country. It was measured that the γ-radiation level and the annual average concentration of 222Rn indoors and outdoors in the bone-coal mine areas in the five provinces. The specific activities of radionuclides in the bone-coal, bone-coal cinder, bone-coal cinders brick et al. were analyzed. The additional dose to the public living in the bone-coal cinder brick house and the other people working in the bone-coal mine area was estimated. The investigation results showed that the mean specific activities of 238U, 226Ra in the bone-coal of the five provinces is 1.3 kBq/kg and 0.9 kBq/kg in the bone-coal cinder brick, respectively. The mean specific activities of 238U, 226Ra in the soil of bone-coal mine area are 0.37 kBq/kg and 0.24 kBq/kg, which are 8 times and 5 times higher than the average background value for the five provinces, respectively. The mean value of γ-radiation dose rate and the annual average concentrations of 222Rn in the bone-coal cinder brick houses in the five provinces are 0.3 μGy/h and 0.15 Bq/m3, respectively. The additional annual average doses, which are caused by γ-radiation and potential alpha rays of 222Rn in the bone-coal cinder brick house indoors and outdoors of the five provinces, are 1 mSv and 3 mSv, respectively. The additional collective dose (50 years), which were caused by bone-coal cinder brick house in 25 year, is some 1.5 x 105 person·Sv. Most of bone-coal cinder might not be used in constructional materials when its mass fraction is

  10. An effect of smoking on pulmonary function of underground coal miners in zenica coal mines

    OpenAIRE

    S. Sivić

    2006-01-01

    The objectives of this prospective descriptive controlled study are to determine a prevalence of smokers in coal mines in Zenica and demonstrate how smoking and respirable coal dust affect pulmonary functions. A group of 75 randomly chosen coal miners and 96 randomly chosen metal workers participated in the research. Each examinee had a physical examination, lungs x-ray and spirometric analysis of lungs functions. Forced expiratoryvolume in a second (FEV1) including a ratio of forced expirato...

  11. Coal mining situation in the Federal Republic of Germany. The 1st quarter 2016

    International Nuclear Information System (INIS)

    The paper reports on the coal mining in the Federal Republic of Germany in the 1st quarter of 2016. Statistical data are presented for mining, exports and imports of hard coal and lignite and for employees.

  12. Present situation and developing trend of coal mine automation and communication technology

    Institute of Scientific and Technical Information of China (English)

    HU Sui-yan

    2008-01-01

    Introduced developing process of coal mine automation and communicationtechnology, analyzed present features and characteristics of coal mine automation andcommunication technology, and put forward a few key technical problems needed to besolved.

  13. Study on regional stratagem for coal mine disasters control and prevention in China

    Energy Technology Data Exchange (ETDEWEB)

    Shen, B.; Lei, Y. [China Coal Research Institute, Beijing (China)

    2009-09-15

    A regional strategy study was aimed at coal mine disaster control and prevention, which deepens and enriches the macro-strategy of coal mine disaster control and prevention, and provides an important support for the rapid and healthy development of China's regional coal industry. The country was divided into 4 regions: Northeast, North, South and Xinqing. In view of the regional status of coal mine disasters, the regulation and development trend of regional coal mine disasters was analysed, the outstanding problems and key factors were identified, and general thoughts on regional coal mine disaster control and prevention are put forward. 4 refs., 4 figs., 1 tab.

  14. Study on regional stratagem for coal mine disasters control and prevention in China

    Institute of Scientific and Technical Information of China (English)

    SHEN Bao-hong; LEI Yi

    2009-01-01

    The regional strategy study was aimed at coal mine disaster control and pre-vention, which deepens and enriches the macro-strategy of coal mine disaster control and prevention, and provides an important support for the rapid and healthy development of the regional coal industry. The country was divided into 4 regions: Northeast, North, South and Xinqing. In view of the regional status of coal mine disasters, the regulation and de-velopment trend of regional coal mine disasters were analyzed, the outstanding problems and key factors were identified, and the general thoughts on regional coal mine disaster control and prevention were put forward.

  15. The menless technologies and robotisation in coal mines

    Energy Technology Data Exchange (ETDEWEB)

    Kruszecki, L.; Wasowicz, B. (Akademia Gorniczo-Hutnicza, Cracow (Poland). Instytut Maszyn Gorniczych, Przerobczych i Automatyki)

    1989-10-01

    Discusses use of robots in underground coal mining. The ROLF robots used in the United Kingdom, the BESTA and ASI robots in Poland and the KM 87A used in the USSR are evaluated. Causes of robot failures, low reliability and limited economic effects are analyzed. On the basis of the analysis, requirements for a new generation of robots for underground coal mining are outlined: walking ability in underground workings with a limited cross section, remote control of TV cameras that supply information to coal miners, remote manipulation of tools used for eliminating failures. Effects on mining cost of reducing oxygen content in the air of workings with robots and reducing dimensions of underground workings are discussed. Use of a new generation of robots is recommended.

  16. Back-and-forth mining for hard and thick coal seams-research about the mining technology for fully mechanized caving working face of Datong Mine

    Institute of Scientific and Technical Information of China (English)

    JIN Zhi-xin; YU Hong; YU Bin; SONG Hua-ling

    2005-01-01

    The article introduced the key technology, mining process, and back-and-forth mining method for the caving working face of hard-thick coal seams in Datcng mine, and researched this innovations process, optimized the systemic design and working face outplay, tried to perfect the caving mining technology of hard-thick coal seams further.

  17. The influence of coal mining on radon potential

    Energy Technology Data Exchange (ETDEWEB)

    Feige, S.; Wiegand, J. [Universitaet Essen Gesamthochschule, Essen (Germany)

    1999-08-01

    Pit waters from hard-coal and brown-coal mining as well as sediments and soils along sewers and rivers in the vicinity of collieries are investigated in the scope of radiation protection. The greatest amount of Ra-226 is discharged by hard-coal collieries in the order of several ten Bq l{sup -1} at simultaneous occurrence of high mineralised brines. In contact with sulphate-bearing surface water, Ra-226 co-precipitates with Ba and is deposited as radiobarite. The contamination with Ra-226 leads to high activity concentrations and increased gamma dose rates. The special situation of diadochic incorporation of Ra-226 into the dense crystal lattice prevents Rn-222 from emanating. However, in sediments influenced by brown-coal mining Ra-226 is adsorbed at the surfaces of ferric hydroxides and, therefore, Rn-222 can easily emanate.

  18. Study of monitoring mining subsidence in coal mining area by D-InSAR technology

    Institute of Scientific and Technical Information of China (English)

    PEI Liang; LI Wen-jie; TAN Yang

    2008-01-01

    Along with the increasing demand for coal and the great importance attached to mine safety, gaining the information of mine surface distortion timely has already become an urgent need to guarantee the safety of mine production. D-InSAR technology is a new measure which can provide the information of surface distortion in mining areas at centi-meter level through the processing of SAR image gained from radar satellite. In addition, this technology has the advantage of monitoring large areas with no weather limit. Intro-duced the basic principle and data processing steps of D-InSAR systematically and ac-quired the differential interferometry based on case study data. The advantages of D-InSAR and it's usability in monitoring mining subsidence in coal mining areas were proved.

  19. Study of monitoring mining subsidence in coal mining area by D-InSAR technology

    Institute of Scientific and Technical Information of China (English)

    PEI Liang; LI Wen-jie; TAN Yang

    2008-01-01

    Along with the increasing demand for coal and the great importance attached to mine safety,gaining the information of mine surface distortion timely has already become an urgent need to guarantee the safety of mine production.D-InSAR technology is a new measure which can provide the information of surface distortion in mining areas at centimeter level through the processing of SAR image gained from radar satellite.In addition,this technology has the advantage of monitoring large areas with no weather limit.Introduced the basic principle and data processing steps of D-InSAR systematically and acquired the differential interferometry based on case study data.The advantages of D-InSAR and it's usability in monitoring mining subsidence in coal mining areas were proved.

  20. Volume Computation of a Stockpile - a Study Case Comparing GPS and Uav Measurements in AN Open Pit Quarry

    Science.gov (United States)

    Raeva, P. L.; Filipova, S. L.; Filipov, D. G.

    2016-06-01

    The following paper aims to test and evaluate the accuracy of UAV data for volumetric measurements to the conventional GNSS techniques. For this purpose, an appropriate open pit quarry has been chosen. Two sets of measurements were performed. Firstly, a stockpile was measured by GNSS technologies and later other terrestrial GNSS measurements for modelling the berms of the quarry were taken. Secondly, the area of the whole quarry including the stockpile site was mapped by a UAV flight. Having considered how dynamic our world is, new techniques and methods should be presented in numerous fields. For instance, the management of an open pit quarry requires gaining, processing and storing a large amount of information which is constantly changing with time. Fast and precise acquisition of measurements regarding the process taking place in a quarry is the key to an effective and stable maintenance. In other words, this means getting an objective evaluations of the processes, using up-to-date technologies and reliable accuracy of the results. Often legislations concerning mine engineering state that the volumetric calculations are to present ±3% accuracy of the whole amount. On one hand, extremely precise measurements could be performed by GNSS technologies, however, it could be really time consuming. On the other hand, UAV photogrammetry presents a fast, accurate method for mapping large areas and calculating stockpiles volumes. The study case was performed as a part of a master thesis.

  1. Population cancer risks associated with coal mining: a systematic review.

    Directory of Open Access Journals (Sweden)

    Wiley D Jenkins

    Full Text Available BACKGROUND: Coal is produced across 25 states and provides 42% of US energy. With production expected to increase 7.6% by 2035, proximate populations remain at risk of exposure to carcinogenic coal products such as silica dust and organic compounds. It is unclear if population exposure is associated with increased risk, or even which cancers have been studied in this regard. METHODS: We performed a systematic review of English-language manuscripts published since 1980 to determine if coal mining exposure was associated with increased cancer risk (incidence and mortality. RESULTS: Of 34 studies identified, 27 studied coal mining as an occupational exposure (coal miner cohort or as a retrospective risk factor but only seven explored health effects in surrounding populations. Overall, risk assessments were reported for 20 cancer site categories, but their results and frequency varied considerably. Incidence and mortality risk assessments were: negative (no increase for 12 sites; positive for 1 site; and discordant for 7 sites (e.g. lung, gastric. However, 10 sites had only a single study reporting incidence risk (4 sites had none, and 11 sites had only a single study reporting mortality risk (2 sites had none. The ecological study data were particularly meager, reporting assessments for only 9 sites. While mortality assessments were reported for each, 6 had only a single report and only 2 sites had reported incidence assessments. CONCLUSIONS: The reported assessments are too meager, and at times contradictory, to make definitive conclusions about population cancer risk due to coal mining. However, the preponderance of this and other data support many of Hill's criteria for causation. The paucity of data regarding population exposure and risk, the widespread geographical extent of coal mining activity, and the continuing importance of coal for US energy, warrant further studies of population exposure and risk.

  2. Selection of an Appropriate Mechanized Mining Technical Process for Thin Coal Seam Mining

    OpenAIRE

    Chen Wang; Shihao Tu

    2015-01-01

    Mechanized mining technical process (MMTP) related to the control method of the shearer is a vital process in thin coal seam mining operations. An appropriate MMTP is closely related to safety, productivity, labour intensity, and efficiency. Hence, the evaluation of alternative MMTP is an important part of the mining design. Several parameters should be considered in MMTP evaluation, so the evaluation is complex and must be compliant with a set of criteria. In this paper, two multiple criteri...

  3. Coal mine gas monitoring system based on wireless sensor network

    Institute of Scientific and Technical Information of China (English)

    WANG Jian; WANG Ru-lin; WANG Xue-min; SHEN Chuan-he

    2007-01-01

    Based on the nowadays'condition.it is urgent that the gas detection cable communication system must be replaced by the wireless communication systems.The wireless sensors distributed in the environment can achieve the intelligent gas monitoring system.Apply with multilayer data fuse to design working tactics,and import the artificial neural networks to analyze detecting result.The wireless sensors system communicates with the controI center through the optical fiber cable.All the gas sensor nodes distributed in coal mine are combined into an intelligent,flexible structure wireless network system.forming coal mine gas monitoring system based on wireless sensor network.

  4. Bacterial modulation of the lung response to coal mine dust

    Energy Technology Data Exchange (ETDEWEB)

    Cullen, R.T.; Slight, J.; MacLaren, W.M. [Institute of Occupational Medicine, Edinburgh (United Kingdom)

    1997-12-31

    A study is reported which examined, in an animal model, the effects of bacteria (Corynebacterium parvum) and a bacterial product, lipopolysaccharide (endotoxin), on the pulmonary response to instilled coal mine dust. Dust from the air of a British mine producing a low rank coal was instilled into the lungs of SPF male Wistar rats. The study concluded that infection, both in the lung and at remote sites, could modulate the activity of the alveolar macrophage, a key cell in dust pathogenesis because of its ability to imitate and regulate inflammation and fibrogenesis. 17 refs., 4 figs.

  5. Radon concentrations in coal mines of Baluchistan, Pakistan

    International Nuclear Information System (INIS)

    Prolonged exposure to radon, the largest source (69%) of natural radioactivity, may cause lung cancer and bronchial tissue damage. So monitoring of radon at places of high radioactivity and in underground mines is important to assess the radiological hazards to occupational workers. For these reasons radon measurements were carried out in some coal mines of Baluchistan, Pakistan. The measurements were based upon passive detection of radon using CN-85 track detectors in Box Type Dosimeters. The radon concentration varied from 121 to 408 Bq m-3 in the mines under study. The computed radon dose varied from 1.38 to 4.67 mSv yr-1 with an average of 2.19±0.5 mSv yr-1. These coal mines have been found to be safe from radon-related health hazards

  6. Characterizing a fractured aquifer in Mexico using geological attributes related to open-pit groundwater

    Science.gov (United States)

    Herrera, Enrique; Garfias, Jaime

    2013-09-01

    A multivariable analysis of the Rock Quality Designation ( RQD) and its relation with the hydraulic conductivity of 17 dewatering wells in an open-pit mine (central Mexico) is presented as a tool for groundwater exploration in fractured aquifers. A solid model was constructed with the RQD data using three sizes for each grid cell and four interpolation methods. The inverse-distance method with a small grid gives the best results. The resulting RQD solid model was used to locate 22 pilot holes, on which an air-lift test was performed as a qualitative assessment of their usefulness. The results showed a lower water production (1.8 l/s) in shale that has low alteration, whereas in highly altered shale, breccias, and intrusive rock, the flow rate was 3.9 l/s. This implies an important relationship between the pilot-hole performance, the lithology, and the rock alteration, but it was also found that some fractures or faults, which cannot be detected clearly by the RQD, play an important role in the hydrodynamics of the aquifer. In conclusion, it is necessary to consider all available factors that can help to identify the hydrodynamic behavior of the aquifer because using only RQD data can lead to errors in prospecting for groundwater.

  7. Use of booster fans in underground coal mining to advantage

    Institute of Scientific and Technical Information of China (English)

    Habibi A; Gillies A D S

    2011-01-01

    A booster fan is an underground main fan which is installed in series with a main surface fan and used to boost the air pressure of the ventilation to overcome mine resistance.Currently booster fans are used in several major coal mining countries including the United Kingdom,Australia,Poland and China.In the United States booster fans are prohibited in coal mines although they are used in several metal and non-metal mines.A study has been undertaken to examine alternatives for ventilating an underground room and pillar coal mine system.A feasibility study of a hypothetical situation has shown that current ventilation facilities are incapable of fulfilling mine air requirements in the future due to increased seam methane levels.A current ventilation network model has been prepared and projected to a mine five years plan.“Ventsim visual” software simulations of different possible ventilation options have been conducted in which varying methane levels are found at working faces.The software can also undertake financial simulations and project present value total costs for the options under study.Several scenarios for improving the ventilation situation such as improving main surface fans,adding intake shafts,adding exhaust shafts and utilizing booster fans have been examined.After taking into account the total capital and operating costs for the five years mine plan the booster fan scenarios are recommended as being the best alternatives for further serious consideration by the mine.The optimum option is a properly sized and installed booster fan system that can be used to create safe work conditions,maintain adequate air quantity with lowest cost,generate a reduction in energy consumption and decrease mine system air leakage.

  8. Solution of underground mine gas emissions on surface of abandoned mining sites where steep deposited coal seams have been exploited

    Energy Technology Data Exchange (ETDEWEB)

    Takla, G.; Froml, K. [OKD, DPB, Paskov (Czech Republic)

    2005-07-01

    The solution of uncontrolled gas emissions from abandoned underground coal mine sites in Ostrava-Karvina coal-field to surface ground in connection with old mine shafts and drifts and with old mining workings in horizontal and inclined coal seams has many forms. It varies according to geological and mining conditions and the disposition of the site surface. Since four years the gas emission risk has appeared in the area of former exploited vertical coal seams within the historical centre of Orlova town, which is protected by State Monument Protection office. A project based on such special nature of mining-geological and urban conditions was elaborated and already implemented. (authors)

  9. Ecological assessment of coal mine and metal mine drainage in South Korea using Daphnia magna bioassay.

    Science.gov (United States)

    Lee, Sang-Ho; Kim, Injeong; Kim, Kyoung-Woong; Lee, Byung-Tae

    2015-01-01

    In order to assess the ecological effect of acid mine drainage, metal mine (Dalsung) and coal mine (Samtan) drainage in South Korea were collected. The each mine drainage then investigated by whole effluent toxicity test (WET) and toxicity identification evaluation (TIE). WET results demonstrated that DS leachate and ST mine water is more toxic than other mine drainage due to the presence of cationic metals and acidic pH. TIE results revealed that the acidic pH and copper (Cu) could be the main toxicants in both mine drainage. The strong acidic pH (pH toxicity by increase of metal activity and bioavailability. The toxicity of most mine drainage revealed that the positive correlation between metal concentration and toxicity unit (TU). The regression data between TU and sum of cumulative criterion unit (CCU) demonstrated the reasonable statistical significance (R = 0.89; p toxicity by the effect of amorphous iron precipitate. PMID:26405638

  10. Design of mine ventilation vis a vis the model of an underground black coal mine

    Energy Technology Data Exchange (ETDEWEB)

    Niemiec, G.; Drenda, J.; Pszczolka, M. [Politechnika Slaska, Gliwice (Poland). Katedra Eksploatacji Zloz

    1992-12-31

    Discusses the KOWEKO computer program developed in 1988-1990 within the WWK Nr 103 branch research program for design of ventilation systems in underground black coal mines. The program is used for optimization of mine design and mine modernization. The basic ventilation systems used in Poland are comparatively evaluated: a central ventilation system, a wing ventilation system and a combined (central-wing) ventilation system. The KOWEKO program is used for the following calculations: volume of air for mine ventilation, ventilation capacity of ventilation tunnels, number and dimensions of mine shafts and main development workings, parameters of main blowers, range of influence of individual blowers. The program is also used for selecting the optimum arrangement of mine shafts and selecting the optimum site for additional mine shafts during mine modernization. Practical use of the program is explained on a number of examples.

  11. Morphogenetic classification of coal seam washouts in Donbass mines

    Energy Technology Data Exchange (ETDEWEB)

    Shul' ga, V.F.; Vashchenko, V.I.

    1982-09-01

    The paper evaluates washout types in coal seams in Donbass mines. Five washout types are characterized: trough-shaped, V-shaped or U-shaped, lentil-shaped, consisting of groups of small lentils and discontinuous washouts which consist of a number of coal and rock partings. Each of the 5 washout types is shown in a scheme. The following aspects of coal seam washouts are discussed: dimensions, shape, angle of inclination of trough walls, washout dimensions in relation to coal seam thickness, rock types filling washout zones. Effects of seam washouts on longwall mining are analyzed. Morphogenetic characteristics of 5 washout groups are given. Investigations show that trough-shaped, U or V-shaped washouts are of epigenetic origin and lentil-shaped, discontinuous washouts consisting of a number of rock and coal partings and washouts with groups of rock lentils are of syngenetic origin. Washout classification is shown in a table. Classification is aimed at optimizing the mining system in washout zones. It considers washout dimensions, washout dimensions in relation to coal seam thickness and rock type filling the washout (sandstone, agrillite or aleurite). System for coding information on washouts is described.

  12. Proceedings of the 86th regular meeting of the Rocky Mountain Coal Mining Institute

    International Nuclear Information System (INIS)

    This book covers the proceedings of the 1990 Rocky Mountain Coal Mining Institute Convention. It includes: an acid rain legislation update; views on the future of western coal demands and production; and federal coal strategies for the 1990's

  13. Thick seam coal mining - Collinsville. [Queensland

    Energy Technology Data Exchange (ETDEWEB)

    Richards, O.J.; O' Beirne, T.

    1982-01-01

    After model tests and mathematical modelling, field trials of a slicing system using a modified Wongawilli system of pillar extraction are being carried out. Continuous miners extract the coal. Extraction of up to 75% of the coal is possible in good geological conditions.

  14. Coal deposits of the United States

    Science.gov (United States)

    John, Nelson W.

    1987-01-01

    The coal fields of the Unites States can be divided into six major provinces. The Appalachian and Interior Provinces contain dominantly bituminous coal in strata of Pennsylvanian age. The coal seams are relatively thin and are mined both by surface and underground methods. Sulfyur content is low to moderate in the Appalachian Province, generally high in the Interior province. The Gulf Coastal Plain Province, in Texas and neighboring states, contains lignite of Eocene age. The seams are 3-25 ft (0.9-7.5 m) thick and are minded in large open pits. The Northern Great Plains Province has lignite and subbituminous coal of Cretaceous, Paleocene and Eocene age. The coal, largely very low in sulfur, occurs in beds up to 100 ft (30 m) thick and is strip-mined. The Rocky Mountain Province contains a great variety of coal deposits in numerous separate intermontane basins. Most of it is low-sulfur subbituminous to bituminous coal iof Creatceous and early Tertiary age. The seams range from a few feet to over 100 ft (30 m) thick. Strip-mining dominates but underground mines are important in Utah and Colorado. The Pacific Coast Province, which includes Alaska, contains enormous cola resources but has seen little mining. The coal is highly diverse in physical character and geologic setting. ?? 1987.

  15. Arc Export File Of Permitted and Mined Out Coal Areas of the Gulf Coast Coal-Bearing (gulfmines.e00)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This dataset contains permitted coal mines and mined out areas in the Gulf Coast coal-bearing geology prior to 1998. The data included in the coverage are mine...

  16. Washability analysis of high sulfur coal gangue from a Coal mine in Guizhou

    Institute of Scientific and Technical Information of China (English)

    TANG Yun; DAI Wen-zhi; ZHANG Qin; NIE Guang-hua; CHENG Jiang-guo; TUO Bi-yang; MAO Song; NIU Fang-yin

    2007-01-01

    Fulfill the screen test and float-and-sink analysis for high sulfur coal gangue from a Guizhou coal mine,analyzed the washability of its tail coal.Seen from the results:most of sulfur in sample is pyrite,the Sulfur content of different particle classification shall be reduced with the decreasing of size and specific gravity,most of sulfur distributed in the coal particles with large-size and high specific gravity.Part of sulfur may be eliminated through special gravity separation,however,most of inorganic sulfur should be removed with the combination of floatation process.

  17. Study on coal mines accidents based on the grey relational analysis

    Institute of Scientific and Technical Information of China (English)

    WANG Shuai; ZHANG Jin-long

    2008-01-01

    The subject investigated the system of people-machine-environment in coal mines. The coal mines working process was researched and the theory of grey system was applied to analyze coal mines safety accidents and those relevant factors. This re-search reveals that this analysis method is easy and highly available and the result is of great credibility, which can not only provide theoretical supports to the quantitative study of coal mines safety accident, but offer basis for coal mines companies' safety management.

  18. Closed-loop prevention and control research of coal mine safety management

    Institute of Scientific and Technical Information of China (English)

    LI Xing-dong; ZHAO Yun-xia; ZHAO Xing-qiang; LU Ying

    2009-01-01

    According to the current problems of safety management processes in coal mine enterprises, we introduced barrel theory to coal mine safety management, con-structed the closed-loop structure of a coal mine safety management system, and pointed out that efficient safety management lies in three factors: safety quality of all of the staff in coal mine enterprises, weak links in security management systems, and co-operation among departments. After conducting detailed analysis of these three factors, we proposed concrete ways of preventing and controlling potential safety hazards during the process of coal mine production.

  19. From in-situ coal to fly ash: A study of coal mines and power plants from Indiana

    Science.gov (United States)

    Mastalerz, Maria; Hower, J.C.; Drobniak, A.; Mardon, S.M.; Lis, G.

    2004-01-01

    This paper presents data on the properties of coal and fly ash from two coal mines and two power plants that burn single-source coal from two mines in Indiana. One mine is in the low-sulfur (5%) Springfield Coal Member of the Petersburg Formation (Pennsylvanian). Both seams have comparable ash contents (???11%). Coals sampled at the mines (both raw and washed fractions) were analyzed for proximate/ultimate/sulfur forms/heating value, major oxides, trace elements and petrographic composition. The properties of fly ash from these coals reflect the properties of the feed coal, as well as local combustion and post-combustion conditions. Sulfur and spinel content, and As, Pb and Zn concentrations of the fly ash are the parameters that most closely reflect the properties of the source coal. ?? 2004 Elsevier B.V. All rights reserved.

  20. Coal-mine production history from 1984 through 1995 in the Colorado Plateau coal assessment study area (cpmphg)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This is a point coverage containing 12 years (1984 through 1995) of coal mining history in the Colorado Plateau coal assessment study area. This layer was derived...

  1. Mycobacterium marinum Infection After Exposure to Coal Mine Water.

    Science.gov (United States)

    Huaman, Moises A; Ribes, Julie A; Lohr, Kristine M; Evans, Martin E

    2016-01-01

    Mycobacterium marinum infection has been historically associated with exposure to aquariums, swimming pools, fish, or other marine fauna. We present a case of M marinum left wrist tenosynovitis and elbow bursitis associated with a puncture injury and exposure to coal mine water in Illinois. PMID:26835478

  2. Valuing the Non-Market Impacts of Underground Coal Mining

    OpenAIRE

    Gillespie, Robert; Kragt, Marit Ellen

    2010-01-01

    This paper has been published in a peer-reviewed journal as: Gillespie, R. & M. E. Kragt (2012). "Accounting for nonmarket impacts in a benefit-cost analysis of underground coal mining in New South Wales, Australia." Journal of Benefit-Cost Analysis 3(2): article 4. DOI: 10.1515/2152-2812.1101

  3. 75 FR 17511 - Coal Mine Dust Sampling Devices

    Science.gov (United States)

    2010-04-06

    .... 74.3 Sampler Unit D. Sec. 74.4 Specifications of Sampler Unit E. Sec. 74.5 Tests of Coal Mine Dust...., Inc., now Thermo Fisher Scientific, developed an initial prototype CPDM under contract with NIOSH. The.... Laboratory and field performance of a continuously measuring personal respirable dust monitor. CDC RI...

  4. 78 FR 48591 - Refuge Alternatives for Underground Coal Mines

    Science.gov (United States)

    2013-08-08

    ... Appropriations Act of 2008, SEC. 112(b)). MSHA published a notice of proposed rulemaking on June 16, 2008 (73 FR 34140) and the final rule on December 31, 2008 (73 FR 80656). The final rule established requirements... Refuge Alternatives for Underground Coal Mines; Proposed Rules #0;#0;Federal Register / Vol. 78 , No....

  5. 30 CFR 716.4 - Special bituminous coal mines.

    Science.gov (United States)

    2010-07-01

    ... INTERIOR INITIAL PROGRAM REGULATIONS SPECIAL PERFORMANCE STANDARDS § 716.4 Special bituminous coal mines... may be used if necessary to prevent erosion. (3) Spoil piles will be graded and contoured with no more... of an amendment or revision to the State of Wyoming's regulatory program, regulations, or...

  6. Phytoremediation of coal mine spoil dump through integrated biotechnological approach

    Energy Technology Data Exchange (ETDEWEB)

    Juwarkar, A.A.; Jambhulkar, H.P. [National Environmental Engineering Research Institute, Nagpur (India)

    2008-07-15

    Field experiment was conducted on mine spoil dump on an area of 10 ha, to restore the fertility and productivity of the coal mine spoil dump using integrated biotechnological approach. The approach involves use of effluent treatment plant sludge (ETP sludge), as an organic amendment, biofertilizers and mycorrihzal fungi along with suitable plant species. The results of the study indicated that amendment with effluent treatment plant sludge (ETP sludge), at 50 ton/ha improved the physico-chemical properties of coal mine spoil. Due to biofertilizer inoculation different microbial groups such as Rhizobium, Azotobacter and VAM spores, which were practically absent in mine spoil improved greatly. Inoculation of biofertilizer and application of ETP sludge helped in reducing the toxicity of heavy metals such as chromium, zinc, copper, iron, manganese lead, nickel and cadmium, which were significantly reduced to 41%, 43%, 37%, 37%, 34%, 39%, 37% and 40%, respectively, due to the increased organic matter content in the ETP sludge and its alkaline pH (8.10-8.28), at which the metals gets immobilized and translocation of metals is arrested. Thus, amendment and biofertilizer application provided better supportive material for anchorage and growth of the plant on coal mine spoil dump.

  7. Mexican coal mining labor in Texas and Coahuila, 1880 1930

    Energy Technology Data Exchange (ETDEWEB)

    Roberto R. Calderon [University of California-Riverside (USA). Department of Ethnic Studies

    1999-12-01

    The years 1880 to 1930 mark the period in Texas' coal mining history known as the handloading era, during which the system of mining for coal by hand was established and gave way to new methods used on both sides of the Texas-Mexico border. The contributions of the large immigrant population who worked these mines have long been overlooked. The complexities of mining, investment capital, labor markets, railroad construction, and racial ideology in Texas and Coahuila, Mexico are examined during a period of economic growth and social disruption. The history of the mines, the industrial and urban markets, and the life of workers and their response to changing conditions are discussed. Variables such as education and literacy are used to analyze the influence of the immigrant laborers in two important Texas border counties, Webb and Maverick, in coal production. In so doing, Calderon revises the view that Mexican workers were careless and difficult to work with and documents their struggle for recognition and union organization. 4 figs., 19 tabs., 17 photos. 3 maps.

  8. New Respirable Dust Suppression Systems for Coal Mines

    Institute of Scientific and Technical Information of China (English)

    XIE Yao-she; FAN Gao-xian; DAI Jun-wei; SONG Xiao-bo

    2007-01-01

    Dust suppression in coal mines is a worldwide problem which has not been solved effectively. The application of negative pressure secondary dust removal (NPSDR) is a breakthrough in the coal mine safety field. In this paper, NPSDR technology and ultrasonic dust suppression systems are introduced. High pressure water is supplied to the NPSDR device which is mounted on the shearer. A negative pressure field is formed in the device. At the same time, the dusty air around the shearer drum will be sucked into, and purged from, the NPSDR device by the negative pressure field. An ultrasonic dust suppression system uses water and compressed air to produce micron sized droplets which suppress respirable coal dust effectively. The NPSDR technology can be used for shearer dust suppression while ultrasonic dust suppression can be applied in areas such as the transportation positions. These dust suppression methods have the following advantages: high efficiency, wide applicability, simple structure, high reliability and low cost.

  9. The South Manchurian Railway Company and the Mining Industry: The Case of the Fushun Coal Mine

    Directory of Open Access Journals (Sweden)

    Tsu-yu Chen

    2015-09-01

    Full Text Available Following the Japanese victory over Czarist Russia in the Russo-Japanese War and the signing of the Treaty of Portsmouth in 1905, the southernmost section of the southern branch of the China Far East Railway (Changchun–Port Arthur was transferred to Japanese control. A new, semi-privately held company, the South Manchuria Railway Company (SMR, Mantetsu, was established with 85.6 percent capitalization by the Japanese government and foreign bonds to operate the railroad and to develop settlements (including highways, public health facilities, educational institutions, and industries (coal mines, harbor facilities, electrical power plants, shale oil plants, chemical plants, and restaurants along its route. SMR nonetheless emphasized railway and mining investment. The centerpiece of its mining interests was the Fushun Coal Mine. Starting in 1917, SMR began to prosper, with most profits coming from its coal mines, and it soon spun off subsidiary companies. In this sense, although the factors that influenced development of the Fushun Coal Mine in each period were different, this development still shows continuity of the business management.

  10. A New Methodology for Open Pit Slope Design in Karst-Prone Ground Conditions Based on Integrated Stochastic-Limit Equilibrium Analysis

    Science.gov (United States)

    Zhang, Ke; Cao, Ping; Ma, Guowei; Fan, Wenchen; Meng, Jingjing; Li, Kaihui

    2016-07-01

    Using the Chengmenshan Copper Mine as a case study, a new methodology for open pit slope design in karst-prone ground conditions is presented based on integrated stochastic-limit equilibrium analysis. The numerical modeling and optimization design procedure contain a collection of drill core data, karst cave stochastic model generation, SLIDE simulation and bisection method optimization. Borehole investigations are performed, and the statistical result shows that the length of the karst cave fits a negative exponential distribution model, but the length of carbonatite does not exactly follow any standard distribution. The inverse transform method and acceptance-rejection method are used to reproduce the length of the karst cave and carbonatite, respectively. A code for karst cave stochastic model generation, named KCSMG, is developed. The stability of the rock slope with the karst cave stochastic model is analyzed by combining the KCSMG code and the SLIDE program. This approach is then applied to study the effect of the karst cave on the stability of the open pit slope, and a procedure to optimize the open pit slope angle is presented.

  11. Abandoned coal mine tunnels: Future heating/power Supply centers

    Institute of Scientific and Technical Information of China (English)

    Luo Pingjia; Chen Ning

    2011-01-01

    We have studied three plans for re-use of the abandoned mine roadway tunnels as an energy center.These are the thermostat plan,the thermal accumulator plan,and the CAES plan.Calculations show that the thermostat plan can provide over 15,000 m2 of building air-conditioning/heating load for each kilometer of roadway,but electric power is needed to run the system.Numerical research proved that the accumulation of hot water in the roadway for seasonal heating purposes (a temperature swing from 90 to 54 ℃) is a viable possibility.The CAES plan proposes using the discarded coal mine tunnel as a peaking power station with an energy storage density over 7000 kJ/m3.It can be concluded that presently abandoned coal mines could be reformed into future energy centers for a city.

  12. Radon concentration measurements in the AMASRA coal mine, Turkey

    International Nuclear Information System (INIS)

    In this study, the results of atmospheric radon measurements that were performed for the Amasra underground coal mine in Zonguldak bituminous coal basin (Turkey) are presented. The radon measurements were performed for 40 days between November 2004 and December 2004 using passive nuclear etched track detectors. The radon concentrations vary from a minimum value 49 Bq m-3 in a site located at +40 m to a maximum value 223 Bq m-3 in a site located at -100 m. Mean concentration is 117 (Bq m-3). This value is well below the action level of 500-1500 Bq m-3 recommended by the International Commission on Radiological Protection (ICRP) (1993). The mean effective dose value for workers of this mine of 3.4 μSv per day was obtained. This result shows that protection against radiological hazards would not be necessary for workers of this mine(2). (authors)

  13. Research on the Factors of Fatigue of Coal Mine Workers and Its Control Measures

    Directory of Open Access Journals (Sweden)

    Zhang Jing-Gang

    2013-07-01

    Full Text Available China is the largest coal producer in the world, it play a important role in the international field of coal production, but due to the frequent occurrence of coal mining accidents, it cause a enormous damage to the state's manpower and material resources. This article on research of the cause of the coal mining accident, it describes the fatigue of the coal mine workers assignment is the main cause of the accident and the threat to the safety of workers, and points out the important factors in ergonomics. MMEC theory is introduced and using for reference MMEC theory, finding out influence the cause of the coal mine worker fatigue, and combined with the relevant laws and regulations system to control and reduce the proposed method of coal mine worker fatigue to reduce and prevent the occurrence of coal mine accidents have some guidance Significance.

  14. Progress in the research and application of coal mining with stowing

    Institute of Scientific and Technical Information of China (English)

    Junker Martin; Witthaus Holger

    2013-01-01

    The development and achievements of modern coal mining with stowing are discussed in this paper.The necessity of developing coal mining with stowing is briefly summarized and internal damage within the strata and external damage on surface induced by longwall working with caving are discussed.Technological features of coal mining with pneumatic stowing in Germany,and fully mechanised coal mining with solid dense stowing in China,are discussed.In German hard coal mining stowing technologies are for technical,infrastructural and economical reasons not applicable.The discussion includes the stowing material transportation system,the stowing machine,and processes at the face.Progressiveness and application universality of China's fully mechanised coal mining with solid dense stowing are illustrated through practical examples with different conditions.Obviously,the fully mechanised coal mine with solid dense stowing can be improved by automaion systems.This paper discusses further developmental potential of the technology.

  15. An investigation of the factors associated with interpretation of mine atmosphere for spontaneous combustion in coal mines

    OpenAIRE

    Adamus, Alois; Šancer, Jindřich; Guřanová, Pavla; Zubíček, Václav

    2011-01-01

    The risk of spontaneous combustion of coal is highly serious especially in gaseous underground coal mines. In many cases such a spontaneous combustion is a source of initiation of methane-explosive mixture with tragic consequences. Early indication of spontaneous combustion and determination of its seat temperature is in a given environment a key part of safety of underground coal mines. A commonly used method for the detection of spontaneous combustion is an interpretation of coal oxidation ...

  16. Coal Mines, Abandoned - AML Inventory Sites 201601

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This data set portrays the approximate location of Abandoned Mine Land Problem Areas containing public health, safety, and public welfare problems created by past...

  17. Coal Mines, Abandoned - AML Points Feature

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This data set portrays the approximate location of Abandoned Mine Land Problem Areas containing public health, safety, and public welfare problems created by past...

  18. Coal Mines, Abandoned - AML Polygons Feature

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This data set portrays the approximate location of Abandoned Mine Land Problem Areas containing public health, safety, and public welfare problems created by past...

  19. Test studies of gas flow in rock and coal surrounding a mined coal seam

    Institute of Scientific and Technical Information of China (English)

    Lv Youchang

    2012-01-01

    An analysis of the variation rule of abutment pressure at the mining working face in a single coal seam and the mechanical behavior of surrounding rock during stoping is presented.Consideration of the elastic and plastic deformation zones that develop during the mining process allowed the determination of a relationship between horizontal stress and vertical stress.Based on this,a confined pressure unloading test was conducted by the use of the "gas-containing coal thermo-fluid-solid coupling 3-axis servo seepage" experimental apparatus.Thus,gas flow patterns in the elastic and plastic zones were derived from an experimental point of view.Darcy's law and the Klinkenberg effect were used to derive a gas flow equation for the elastic and plastic stress fields.The study of gas flow phenomena at the working face during coal mining is of great importance for the study of gas migration and enrichment oatterns.

  20. Proceedings, 86th regular meeting, the Rocky Mountain Coal Mining Institute. [USA - Rocky Mountains

    Energy Technology Data Exchange (ETDEWEB)

    Finnie, D.G. (ed.)

    1990-01-01

    The convention theme was 'Western coal - the strategic solution'. Titles of papers presented include: whither the west; acid rain legislation update; the 1990s - OSM and western coal; the human element of coal mining; competitive edge of western coal; gaining commitment through training; pricing and planning in surface coal projects; truck/shovel prebenching for draglines at the Freedom Mine; Federal Coal strategies for the 1990s; coal mining health, safety and research; the promising outlook for Western coal; western coal demand - an ARCO Coal Company perspective; and western coal - a national perspective. A summary of coal production data for 1988 and 1989 are given, as is a list of RMCMI members.

  1. NV - Assessment of wildlife hazards associated with mine pit lakes

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Several open pit mines in Nevada lower groundwater to mine ore below the water table. After mining, the pits partially fill with groundwater to form pit lakes....

  2. Current situation and problems to be studied for uranium bearing coal deposit mining in China

    International Nuclear Information System (INIS)

    Uranium bearing coal deposits are a specific kind of uranium ore resources. Since uranium bearing coal can generate electricity, provide heat and recover uranium during the process of hydrometallurgy, it is necessary to mine these deposits. This paper summarizes the experiences in uranium bearing coal deposit mining, suggests research topics in this area. It is hoped that these studies can promote the development of uranium bearing coal deposit mining. (authors)

  3. Feasibility of an Integrated Thin Seam Coal Mining and Waste Disposal System

    OpenAIRE

    Basu, Kohinoor

    1997-01-01

    The depletion of more attractive thicker and easily accessible coal seams in the central Appalachia will direct attention towards the extraction of coal seams thinner than 28 in. This thesis investigates the feasibility of an integrated mining and backfilling system applicable to thin seams. Two conceptual mining systems, namely Auger mining and Self Advancing Miner, have been proposed for this purpose. Both these systems are designed to remotely mine coal from the seams. Several ...

  4. Tectonically deformed coal types and pore structures in Puhe and Shanchahe coal mines in western Guizhou

    Institute of Scientific and Technical Information of China (English)

    Li Ming; Jiang Bo; Lin Shoufa; Wang Jilin; Ji Mingjun; Qu Zhenghui

    2011-01-01

    To evaluate the effect of tectonic deformation on coal reservoir properties,we provide an analysis of the types of tectonically deformed coal,macro- and microscopic deformation and discuss pore structural characteristics and connectivity based on samples from the Puhe and Shanchahe coal mines.Our research shows that the tectonically deformed coal mostly includes cataclastic structural coal.mortar structural coal and schistose structural coal of a brittle deformation series.The major pore structures of different types of tectonically deformed coal are transitional pores and micropores.The pore volumes of macropores and visible fracture pores produced by structural deformations vary over a large range and increase with the intensity of tectonic deformation.Mesopores as connecting passages develop well in schistose structural coal.According to the shapes of intrusive mercury curves,tectonically deformed coal can be divided into parallel,open and occluded types.The parallel type has poor connectivity and is relatively closed; the open type reflects uniformly developed open pores with good connectivity while the occluded type is good for coalbed methane enrichment,but has poor connectivity between pores.

  5. Effect of coal slurry on the corrosion of coal-mine equipment

    Institute of Scientific and Technical Information of China (English)

    Zhang Qi; Xie Jingxuan; Zhao Wei; Bai Shasha; Zhong Shiteng; Chu Zhenfeng

    2011-01-01

    The corrosion of coal mine equipment immersed in coal slurry is addressed.The corrosion of low carbon steel samples immersed in coal slurries of different concentrations (80,130,and 180g/L) prepared from coals of different rank (long-flame coal,meager lean coal,and anthracite) and different granularity (0.25-0.5 mm,0.074-0.25 mm,and less than 0.074 mm particle size) was studied by the electrochemical method of polarization curve measurement,controlled potential sweeping,and continuous scanning.The results show that the corrosion rate in an anthracite slurry,where the coal has high coalification,is far greater than corrosion in a long-flame or a meager lean coal slurry.Furthermore the corrosion current,polarization current,and corrosion rate of low carbon steel become larger,and the polarizability becomes smaller,as the coal particle size decreases.The same trend is seen as the concentration of the coal slurry increases.

  6. Prevention and forecasting of rock burst hazards in coal mines

    Institute of Scientific and Technical Information of China (English)

    DOU Lin-ming; LU Cai-ping; MU Zong-long; GAO Ming-shi

    2009-01-01

    Rock bursts signify extreme behavior in coal mine strata and severely threaten the safety of the lives of miners, as well as the effectiveness and productivity of miners. In our study, an elastic-plastic-brittle model for the deformation and failure of coal/rock was established through theoretical analyses, laboratory experiments and field testing, simulation and other means, which perfectly predict sudden and delayed rock bursts. Based on electromagnetic emission (EME), acoustic emission (AE) and microseism (MS) effects in the process from deformation until impact rupture of coal-rock combination samples, a multi-parameter identification of premonitory technology was formed, largely depending on these three forms of emission. Thus a system of classification for forecasting rock bursts in space and time was established. We have presented the intensity weakening theory for rock bursts and a strong-soft-strong (3S) structural model for controlling the impact on rock surrounding roadways, with the objective of laying a theoretical foundation and establishing references for parameters for the weakening control of rock bursts. For the purpose of prevention, key technical parameters of directional hydraulic fracturing are revealed. Based on these results, as well as those from deep-hole controlled blasting in coal seams and rock, integrated control techniques were established and anti-impact hydraulic props, suitable for roadways subject to hazards from rockbursts have also been developed. These technologies have been widely used in most coal mines in China, subject to these hazards and have achieved remarkable economic and social benefits.

  7. Effect of mining and utilizing bone coal on environment

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The average air -ray dose rates measured from the field, road, bone coal, bone coal cinder and bone coalcinder bricks in the three bone coal mines in westZhejiang Province, are 3.8 102,4.1 102, 7.1 102, 4.0 102and 7.1 102 nGy/h, respectively. The mean contents of238U, 226Ra,232Th and 40K in the bone coal of the three bone coalmines are 2.0 103, 2.1 103, 3.9 101 and6.1 102 Bq/kg, respectively, in the bone coal cinder(BCC)are 1.6 103, 1.6 103, 2.3 101and 4.5 102 Bq/kg, respectively, and in the bone coalcinder brick(BCCB) are 1.2 103, 1.2 103,2.4 101 and 4.0 102 Bq/kg, respectively, and those in thereference soil are 3.4 102, 1.0 102, 4.9 101and 4.9 102 Bq/kg, respectively. Theannual mean of effective dose equivalentfor public living in house buildings made with BCCB near thethree mines is 6.8 mSv.

  8. Coal Mine Roadway Stability in Soft Rock: A Case Study

    Science.gov (United States)

    Shen, Baotang

    2014-11-01

    Roadway instability has always been a major concern in deep underground coal mines where the surrounding rock strata and coal seams are weak and the in situ stresses are high. Under the high overburden and tectonic stresses, roadways could collapse or experience excessive deformation, which not only endangers mining personnel but could also reduce the functionality of the roadway and halt production. This paper describes a case study on the stability of roadways in an underground coal mine in Shanxi Province, China. The mine was using a longwall method to extract coal at a depth of approximately 350 m. Both the coal seam and surrounding rock strata were extremely weak and vulnerable to weathering. Large roadway deformation and severe roadway instabilities had been experienced in the past, hence, an investigation of the roadway failure mechanism and new support designs were needed. This study started with an in situ stress measurement programme to determine the stress orientation and magnitude in the mine. It was found that the major horizontal stress was more than twice the vertical stress in the East-West direction, perpendicular to the gateroads of the longwall panel. The high horizontal stresses and low strength of coal and surrounding rock strata were the main causes of roadway instabilities. Detailed numerical modeling was conducted to evaluate the roadway stability and deformation under different roof support scenarios. Based on the modeling results, a new roadway support design was proposed, which included an optimal cable/bolt arrangement, full length grouting, and high pre-tensioning of bolts and cables. It was expected the new design could reduce the roadway deformation by 50 %. A field experiment using the new support design was carried out by the mine in a 100 m long roadway section. Detailed extensometry and stress monitorings were conducted in the experimental roadway section as well as sections using the old support design. The experimental section

  9. Mining a coal seam below a heating goaf with a force auxiliary ventilation system at Longhua underground coal mine, China

    Institute of Scientific and Technical Information of China (English)

    Wang Gang; Xie Jun; Xue Sheng; Wang Haiyang

    2015-01-01

    Extraction of a coal seam which lies not far below a heating goaf can be a major safety challenge. A force auxiliary ventilation system was adopted as a control method in successful extraction and recovery of the panel 30110 of the #3?1 coal seam, which is about 30–40 m below the heating goaf of the #2?2 seam at Longhua underground coal mine, Shanxi Province, China. Booster fans and ventilation control devices such as doors and regulators were used in the system. The results show that, provided that a force auxiliary ventilation system is properly designed to achieve a pressure balance between a panel and its overlying goaf, the system can be used to extract a coal seam overlain by a heating goaf. This paper describes the design, installation and performance of the ventilation system during the extraction and recovery phases of the panel 30110.

  10. Coal Valley mine site tailings reclamation research project geotechnical report

    Energy Technology Data Exchange (ETDEWEB)

    Law, D.J. [Thurber Engineering Ltd., Calgary, AB (Canada)

    1992-11-25

    A study to characterize the geotechnical properties of coal tailings in a tailings pond at the Luscar Sterco (1977) Ltd. Coal Valley mine in Alberta, Canada and to monitor the change in strength and amount of settlement of the tailings deposit after capping with one foot of soil is described. The results of four field programmes (completed in November 1988, March 1989, January 1990, and August 1992, respectively) are used to assess the geotechnical feasibility of reclaiming the tailings deposit. 12 figs., 2 tabs., 2 apps.

  11. Study on land use changes of the coal mining area based on TM image

    Institute of Scientific and Technical Information of China (English)

    WU Wen-bo; YAO Jing; KANG Ting-jun

    2008-01-01

    Based on the two temporal TM images of 1995 and 2001 of one coal mining area, analyzed the variety information of the coal mining area. Relative registration were done with the two images firstly, then cut out the study area for experimental data, classified the coal mining area using supervised classification in ERDAS, the coal mining area will be divided into five categories as water body, agricultural land, construction land, coal mining area and other land. Make land use change matrix, the result shows that in the six years of 1995 to 2001, the change of the utilize of the land is greatly, the main represent is showed as follows: the area of water body, agricultural land and coal mining land had continually increased, on the contrary, construction area and other decreased. The percentage speed of the construction land is the biggest, the value reach -1.08%. The main reasons is that with the exploitation of the coal mine and the reclaim of the land, the exploitation of the coal mining land make the agricultural land and construction area convert into coal mining land, on the other hand with the backfill of the subsided waterlogged land and the reclaim of the subsided land make the coal mining land convert into agricultural land.

  12. LAND RECLAMATION IS BASIC GUARANTEE OF REGIONAL SUSTAINABLE DEVELOPMENT IN COAL MINING AREAS IN CHINA

    Institute of Scientific and Technical Information of China (English)

    张和生; 刘邦涛; 周丽霞; 崔春香

    1998-01-01

    Necessity of land reclamation is discussed, setting out viewpoint of sustainabledevelopment and land connotation and its attribute and combining destroyed forms andcharacteristics of land in coal mining areas. It is pointed out that land reclamation of coal miningareas is basic guarantee of solving contradiction between coal mining areas and countryside,raising life of resident and ensuring regional sustainable development.

  13. Planning for reliable coal quality delivery considering geological variability: A case study in polish lignite mining

    NARCIS (Netherlands)

    Naworyta, W.; Sypniowski, S.; Benndorf, J.

    2015-01-01

    The aim of coal quality control in coal mines is to supply power plants daily with extracted raw material within certain coal quality constraints. On the example of a selected part of a lignite deposit, the problem of quality control for the runof-mine lignite stream is discussed. The main goal is t

  14. Coal mining situation in the Federal Republic of Germany. 1st half of 2015

    International Nuclear Information System (INIS)

    The report on coal mining in Germany contains statistical data on the following issues: (a) Hard coal mining: part 1: production, resources, performance, employees; part 2: marketing and foreign commerce. (b) brown coal: part 1: production, resources, performance, employees; part II: marketing in domestic and foreign commerce.

  15. Enhanced power plant performance through coal feed modeling, TRANSALTA Utilities Corporation Highvale Mine, Alberta, Canada

    Energy Technology Data Exchange (ETDEWEB)

    Malesk, C.; Borsboom, F. [TransAlta Utilities Corporation, Duffield, AB (Canada). Sundance Generating Plant

    1996-12-31

    The importance of feed control in coal-fired electrical power generation is discussed. A coal feed stockpile that was developed to increase plant performance is described. To convert coal supplies economically and with minimal impact on the environment, power plant coal inventories must be managed to provide a homogeneous coal feed to the generating plant. The mine engineering tools used at Highvale Mine for blending to achieve this goal are described. The learning process that occurred at the mine and the impact of coal feed modelling on generator performance are described. 3 refs., 2 figs., 6 tabs.

  16. The adjusting mining technology of combining fully mechanized with individual prop, rotating, hilt, irregular form, and double unit face on thin coal seam of Tianchen Mine

    Institute of Scientific and Technical Information of China (English)

    SONG Hua-ling; WEN Guo-feng; LI Jin-ke

    2008-01-01

    Analyzed the situations and characteristics of thin coal seam mining and its mining technologies, and introduced the mining innovation technology used by Tianchen Coal Mine of Zhaozhuang Coal Company of China. This innovation technology combined the fully mechanized mining with individual props, and the working face of mining is over length, irregular form and double units. The rotational adjusting mining technology on thin coal seam is also practiced in this new mining technology. The detail technologies, such as outlays of working face and ways, mining methods, equipments of cutting, transporting and sporting, have been introduced. So that, using the synthetic and creative mining tech-nologies, Tianchen Coal Mine solves the mining problems of thin coal seam successfully.

  17. Uncertainty Representation Method for Open Pit Optimization Results Due to Variation in Mineral Prices

    Directory of Open Access Journals (Sweden)

    Jieun Baek

    2016-02-01

    Full Text Available This study proposes a new method to quantitatively represent the uncertainty existing in open pit optimization results due to variations in mineral prices. After generating multiple mineral prices using Monte Carlo simulation with data on past mineral prices, a probability model that represents the uncertainty was developed by integrating multiple open pit optimization results derived from the mineral prices. The results of applying the proposed method to the copper-zinc deposits showed that significant uncertainty exists in open pit optimization results due to the variation in copper prices. It was also found that the method has a potential as a tool for classifying the estimation results of ore reserve based on confidence level.

  18. Characterization of deep ground geothermal field in Jiahe Coal Mine

    Institute of Scientific and Technical Information of China (English)

    Zhang Yi; Guo Dongming; He Manchao; Jiang Yaodong; Yang Qing

    2011-01-01

    Research into the characteristics of geothermal fields is important for the control of heat damage in mines.Based on measured geothermal data of boreholes from -200 m to -1200 m in a Jiahe Coal Mine,we demonstrate non-linear but increasing relations of both geo-temperatures and geothermal gradients with increases depth.Numerically,we fitted the relationship between geo-temperatures and depth,a first-order exponential decay curve,formulated as:T(h) - -4.975 + 23.08 × exp(-h/1736.1 ).

  19. Mercury distribution in coals influenced by magmatic intrusions, and surface waters from the Huaibei Coal Mining District, Anhui, China

    International Nuclear Information System (INIS)

    Highlights: • Hg concentrations in coal and surface water samples were determined. • Hg is enriched in the Huaibei coals. • Magmatic activities imparted influences on Hg content and distribution. • Hg contents in surface waters are relative low at the present status. - Abstract: The Hg concentrations in 108 samples, comprising 81 coal samples, 1 igneous rock, 2 parting rock samples and 24 water samples from the Huaibei Coal Mining District, China, were determined by cold-vapor atomic fluorescence spectrometry. The abundance and distribution of Hg in different coal mines and coal seams were studied. The weighted average Hg concentration for all coal samples in the Huaibei Coalfield is 0.42 mg/kg, which is about twice that of average Chinese coals. From southwestern to northeastern coalfield, Hg concentration shows a decreasing trend, which is presumably related to magmatic activity and fault structures. The relatively high Hg levels are observed in coal seams Nos. 6, 7 and 10 in the southwestern coal mines. Correlation analysis indicates that Hg in the southwestern and southernmost coals with high Hg concentrations is associated with pyrite. The Hg concentrations in surface waters in the Huaibei Coal Mining District range from 10 to 60 ng/L, and display a decreasing trend with distance from a coal waste pile but are lower than the regulated levels for Hg in drinking water

  20. 平朔安家岭露天煤矿扩能改造工艺选择%Selection of enlarging ability transformation craft in Pingshuoanjialing open-pit coal mine

    Institute of Scientific and Technical Information of China (English)

    贺全超; 杨朝阳; 罗随月; 方涛; 丛山

    2006-01-01

    通过多方案对比分析,结合国内外实际情况,论证了单斗--自移式破碎站-带式输送机--排土机半连续工艺,是安家岭露天煤矿扩能改造稳妥、可靠的开采工艺.

  1. Comprehensive Controlling of Hidden Danger of Internal Waste Dump Production in Yilan Open Pit Coal Mine%依兰露天煤矿内排土场生产安全隐患的综合防治

    Institute of Scientific and Technical Information of China (English)

    孔祥柯

    2009-01-01

    针对露天矿内排土场存在的安全问题,以预防为主,制定并实施了内排土场边坡稳定性评价、排土参数调整、滑坡防治、表土覆盖等消、防综合防灭火措施,确保内排土场的安全运行.

  2. Research on New Method of Full-Seam Mining for Gently Inclined Thick Coal Seams

    Institute of Scientific and Technical Information of China (English)

    赵景礼; 郭志飙; 柳慧鹏; 赵立军

    2002-01-01

    The recovery ratio of top-coal caving mining plays a key role in the development of this mining method. For the proposes to raise the recovery ratio and considering heading advance and roadway maintenance, a new method of full - seam mining for gently inclined thick coal seams is put forward on the basis of a theoretic research and engineering practice.

  3. Mechanism of Reinforcement on Inwall of Coal Mine Shaft Wall

    Directory of Open Access Journals (Sweden)

    Jinlong Liu

    2013-05-01

    Full Text Available Based on the theory of elasticity, the analytic solution of temperature stress on shaft wall of coal mine with reinforcement on inwall is deduced. It is shown that with the increment of reinforcement stress Pa, the radial compressive stress &sigmar become larger, the vertical compressive stress &sigmaz become less, while the circumferential stress &sigma &theta changed from compressive stress to tensile stress. The stability of shaft wall enhanced with vertical stress reduced by reinforcement on inwall of shaft wall. Compressive steel plate could be used to reinforce the inwall, characterized with low-cost, short time and construction easy. While the intelligent equipment should be developed further to provide everlasting and greater reinforcement on in wall of coal mine shaft wall.

  4. Environmental impact assessment and selenium transformation in coal mine spoils

    Energy Technology Data Exchange (ETDEWEB)

    Atalay, A.; Koll, K.J.

    1991-06-01

    This quarterly report addresses the continued field investigation of a selected coal mining site in Oklahoma. Table 1 (appendix) portrays all the data (field measurements) taken at the Henryetta experimental site. An analysis of this data would be useful in providing information for potential Se migration from a coal mining site and the distribution of Se in a soil profile of land reclaimed to its pristine state. Also addressed is the methodology developed (1) for SeO{sub 4}{sup 2{minus}} and SeO{sub 3}{sup 2{minus}} adsorption on selected soils, (2) leachate migration through a cell column using soil samples from the Henryetta reclamation site, and (3) chemical transformation of SeO{sub 4}{sup 2{minus}} under harsh chemical and conditions.

  5. Damage to underground coal mines caused by surface blasting

    International Nuclear Information System (INIS)

    An investigation of the potential damage to underground coal workings as a result of surface blasting at an opencast coal mine is described. Seismometers were installed in a worked out area of an underground mine, in the eastern Transvaal region of South Africa, and the vibration caused by nearby surface blasting recorded. These measurements were used to derive peak particle velocities. These velocities were correlated with observed damage underground in order to establish the allowable combination of the two blasting parameters of charge mass per relay, and blast-to-gage point distance. An upper limit of 110mm/sec peak particle velocity was found to be sufficient to ensure that the damage to the particular workings under consideration was minimal. It was further found that a cube-root scaling law provided a better fit to the field data than the common square-root law. 11 refs., 6 figs., 5 tabs

  6. Training implications of reform in the Australian coal mining industry

    Energy Technology Data Exchange (ETDEWEB)

    Casey, J. (NSW Coal Association, Sydney, NSW (Australia))

    1992-01-01

    In 1989 the Australian coal mining industry reached an agreement with the unions to restructure the industry improving efficiency and cost effectiveness. Part of this agreement was the provision of structured and accredited training for employees. The Australian coal mining industry has adopted the National Training Reform Agenda and a new system of competency-based training is currently being implemented across Australia. The aims of the new system are: (1) to improve the level and flexibility of skills in the workforce; to better meet the needs of industry; and to facilitate the progressive introduction of a competency based approach to training. Competency based training places the emphasis on what a person can do in the workplace after training rather than the quantity of training (e.g measured by cost or time spent). The paper describes the new training programme and the development of competency standards.

  7. Mechanism of Electronic Charging of Coal Mine Dust

    Directory of Open Access Journals (Sweden)

    Cheng Xue-Zhen

    2013-09-01

    Full Text Available The electronic charging of mine dust can cause coal-dust explosion and increase the risk of pneumoconiosis, so it is necessary to take more attention to the study of its electronic charging properties. The mechanism of electronic charging of coal mine dust was investigated in this paper. It was found that the formation and polarity of dust are determined by the energy band structure and of the two contacting sides; then a mathematical model of work function is established in mesoscopic level. The experiments conclude that the work function decreases with the particle size for the dust with same properties, moreover large particles are positively charged and small particles are negatively charged. Finally, the experimental verification of the main particles charged model drive unipolar and bipolar charged modes and confirm the correctness of microstructure and mesoscopic analyses, which furthermore lay the foundation for further research.

  8. Virginia big-eared bats (Corynorhinus townsendii virginianus) roosting in abandoned coal mines in West Virginia

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, J.B.; Edwards, J.W.; Wood, P.B. [West Virginia University, Morgantown, WV (US). Wildlife & Fisheries Resources Programme

    2005-07-01

    We surveyed bats at 36 abandoned coal mines during summer 2002 and 47 mines during fall 2002 at New River Gorge National River and Gauley River National Recreation Area, WV. During summer, we captured three federally endangered Virginia big-eared bats at two mine entrances, and 25 were captured at 12 mine entrances during fall. These represent the first documented captures of this species at coal mines in West Virginia. Future survey efforts conducted throughout the range of the Virginia big-eared bat should include abandoned coal mines.

  9. Ventilation eddy zones at a model coal mine working face

    Energy Technology Data Exchange (ETDEWEB)

    Kissell, F.N.; Bielicki, R.J.

    1974-01-01

    Tracer gas decay curves were obtained in a full-scale model coal mine working face area. The concentration of tracer gas was found to decay in exponential fashion but with a change in slope. This change in slope is attributed to eddy zones in the face area. A simple theory was developed that allows one to calculate the approximate amount of gas in the eddy zones and thus estimate the size of the eddy zones.

  10. Land management in surface mining with the example of the Belchatow brown coal mine

    Energy Technology Data Exchange (ETDEWEB)

    Wasowicz, J.; Skalska, T.

    1986-01-01

    The Belchatow brown coal surface mine will cover 5720 ha of land - 2563 ha of arable land, 831 ha of pasture land, 1598 ha of forests and 678 ha of other land types (e.g. waste, roads, etc.). Regulations on land management and environmental protection in Poland are analyzed. Their effects on land management in the Belchatow mine are evaluated. Types of soils, their agricultural use, types of private and state farms in the mine area are discussed. Problems associated with expropriation, expropriation cost and effects of mine construction on agriculture in the Belchatow area are also analyzed. Selected problems associated with balance of manpower in the area and effects of growing employment in the mine on lack of manpower in agriculture are evaluated. Program for land reclamation, its cost, planned investment, organizational models of land reclamation and types of land utilization after reclamation are described. 1 refs.

  11. Remediation of coal mining wastewaters using chitosan microspheres

    Energy Technology Data Exchange (ETDEWEB)

    Geremias, R.; Pedrosa, R.C.; Benassi, J.C.; Favere, V.T.; Stolberg, J.; Menezes, C.T.B.; Laranjeira, M.C.M. [Federal University of Santa Catarina, Florianopolis (Brazil)

    2003-12-01

    This study aimed to evaluate the potential use of chitosan and chitosan/poly(vinylalcohol) microspheres incorporating tetrasulphonated copper (II) phthalocyanine (CTS / PVA / TCP) in the remediation of coal mining wastewaters. The process was monitored by toxicity tests both before and after adsorption treatments with chitosan and microspheres. Physicochemical parameters, including pH and trace-metal concentration, as well as bioindicators of water pollution were used to that end. Wastewater samples collected from drainage of underground coal mines, decantation pools, and contaminated rivers were scrutinized. Acute toxicity tests were performed using the Brine Shrimp Test (BST) in order to evaluate the remediation efficiency of different treatments. The results showed that the pH of treated wastewater samples were improved to values close to neutrality. Chitosan treatments were also effective in removing trace-metals. Pre-treatment with chitosan followed by microsphere treatment (CTS / PVA / TCP) was more effective in decreasing toxicity than the treatment using only chitosan. This was probably due to the elimination of pollutants other than trace-metals. Thus, the use of chitosan and microspheres is an adequate alternative towards remediation of water pollution from coal mining.

  12. Detection of Coal Mine Spontaneous Combustion by Fuzzy Inference System

    Institute of Scientific and Technical Information of China (English)

    SUN Ji-ping; SONG Shu; MA Feng-ying; ZHANG Ya-li

    2006-01-01

    The spontaneous combustion is a smoldering process and characterized by a slow burning speed and a long duration. Therefore, it is a hazard to coal mines. Early detection of coal mine spontaneous combustion is quite difficult because of the complexity of different coal mines. And the traditional threshold discriminance is not suitable for spontaneous combustion detection due to the uncertainty of coalmine combustion. Restrictions of the single detection method will also affect the detection precision in the early time of spontaneous combustion. Although multiple detection methods can be adopted as a complementarity to improve the accuracy of detection, the synthesized method will increase the complicacy of criterion, making it difficult to estimate the combustion. To solve this problem, a fuzzy inference system based on CRI (Compositional Rule of Inference) and fuzzy reasoning method FITA (First Infer Then Aggregate) are presented. And the neural network is also developed to realize the fuzzy inference system. Finally, the effectiveness of the inference system is demonstrated by means of an experiment.

  13. Moving up down in the mine: Sex segregation in underground coal mining

    International Nuclear Information System (INIS)

    This study employs both individualist theories of human capital and sex-role spillover and structuralist theories from the socialist feminist perspective, emphasizing the formal and informal organizational factors operating within a patriarchal capitalist society to explain job-level sex segregation among underground coal miners. Both quantitative and qualitative data on women in coal mining are used to evaluate these theories. A logistic regression analysis performed on data obtained in 1986 by the US Bureau of Mines demonstrates that while human capital variables are predictive of a miner's job rank, variation in job rank attributed to gender is even greater. For men, training and experience in mining combine to increase the probability of being in a more skilled job in a coal mine. Age and seniority are curvilinearly related to the variation in men's job rank. For women, only age accounts for their advancement such that younger, not older women who have slightly more mining experience, occupy the more skilled positions in the work place. These findings suggest that, in terms of job advancement, men enjoy a greater return on their human capital investments than women, and that factors other than those representing a miner's human capital are affecting women's positions underground more than men's

  14. Tannery and coal mining waste disposal on soil

    Energy Technology Data Exchange (ETDEWEB)

    Kray, C.H.; Tedesco, M.J.; Bissani, C.A.; Gianello, C.; da Silva, K.J. [CEFET BG, Goncalves (Brazil)

    2008-11-15

    Tannery residues and coal mine waste are heavily polluting sources in Brazil, mainly in the Southern States of Rio Grande do Sul and Santa Catarina. In order to study the effects of residues of chrome leather tanning (sludge and leather shavings) and coal waste on soybean and maize crops, a field experiment is in progress since 1996, at the Federal University of Rio Grande do Sul Experimental Station, county of Eldorado do Sul, Brazil. The residues were applied twice (growing seasons 1996/97 and 1999/00). The amounts of tannery residues were applied according to their neutralizing value, at rates of up to 86.8 t ha{sup -1}, supplying from 671 to 1.342 kg ha{sup -1} Cr(III); coal waste was applied at a total rate of 164 t ha{sup -1}. Crop yield and dry matter production were evaluated, as well as the nutrients (N, P, K, Ca, Mg, Cu and Zn) and Cr contents. Crop yields with tannery sludge application were similar to those obtained with N and lime supplied with mineral amendments. Plant Cr absorption did not increase significantly with the residue application. Tannery sludge can be used also to neutralize the high acidity developed in the soil by coal mine waste.

  15. Influences of coal mining water irrigation on the maize losses in the Xingdong Mine area, China.

    Science.gov (United States)

    Sun, Yuzhuang; Ling, Pei; Li, Yanheng; Li, Qingxue; Sun, Quande; Wang, Jinxi

    2014-02-01

    In 2008, a maize underproduction disaster occurred in the Xianyu village after irrigation using the coal mining water from the Xingdong Mine, China. This disaster resulted in about 40 hectare maize underproduction and 20 hectare total loss of the maize yields. In order to study the reason, a total of 25 soil, water and plant samples were taken from the study area. These samples were analysed by inductively coupled plasma mass spectrometry and ion chromatography. The results indicate that the contents of both water-soluble fluorine and total fluorine are very high and resulting of maize underproduction and total loss of production. The possible pollution sources of fluorine in the study area could be from the coal mine water used for irrigation and glass chemical factory near the study area. PMID:23892594

  16. Deformation Failure Characteristics of Coal Body and Mining Induced Stress Evolution Law

    Directory of Open Access Journals (Sweden)

    Zhijie Wen

    2014-01-01

    Full Text Available The results of the interaction between coal failure and mining pressure field evolution during mining are presented. Not only the mechanical model of stope and its relative structure division, but also the failure and behavior characteristic of coal body under different mining stages are built and demonstrated. Namely, the breaking arch and stress arch which influence the mining area are quantified calculated. A systematic method of stress field distribution is worked out. All this indicates that the pore distribution of coal body with different compressed volume has fractal character; it appears to be the linear relationship between propagation range of internal stress field and compressed volume of coal body and nonlinear relationship between the range of outburst coal mass and the number of pores which is influenced by mining pressure. The results provide theory reference for the research on the range of mining-induced stress and broken coal wall.

  17. The choice of adjustment programmes of China's existing coal mine safety supervision system

    Science.gov (United States)

    Liu, Yong-Liang; He, A.-Hong

    2009-07-01

    At present, China's coal mine safety supervision system adopted in the form of management functions, mosts of rights of central government were decentralized to the locals,which unable to carry out effective supervision of coal mines, resulting in frequent accidents. This paper first discussed the status of China's coal mine safety supervision system; then analyzed the problems existing in the supervision system ,based on these, further presented the perfecting and choice of adjustment programmes of China's coal mine safety supervision. Finally, after comparing the adjustment programmes, adopted "adjust the current supervision system, strengthen vertical management mode of the State Administration of Coal Mine Safety", the author tried to put forward some solutions to China's coal mine safety supervision system.

  18. 77 FR 50165 - Escape and Evacuation Plans for Surface Coal Mines, Surface Facilities and Surface Work Areas of...

    Science.gov (United States)

    2012-08-20

    ... Administration. Title: Escape and Evacuation Plans for Surface Coal Mines, Surface Facilities ] and Surface Work... Safety and Health Administration Escape and Evacuation Plans for Surface Coal Mines, Surface Facilities and Surface Work Areas of Underground Coal Mines AGENCY: Mine Safety and Health Administration,...

  19. Surface movement above an underground coal longwall mine after closure

    Science.gov (United States)

    Vervoort, André

    2016-09-01

    The surface movement in an area of about 22 km2 above the underground coal mine of Houthalen was analyzed based on Interferometry with Synthetic Aperture Radar (InSAR) measurements. After its closure in 1992, a residual subsidence was observed over a period of several years, followed by an uplift of the surface above and around the past longwall panels, whereby the rate of movement was, in absolute terms, of the same order for the two types of movements. The processes behind these movements are different. The process of subsidence is caused by the caving of the roof above the mined-out area and is mainly a mechanical stress-deformation process, including time-dependent aspects. However, the process of uplift is most probably caused by the swelling of the clay minerals in the argillaceous rocks in the coal strata after the flooding of the underground workings. Hence, the areas in which there is the greatest risk of damage to the surface infrastructure are not the same for the hazards linked to subsidence and uplift. For example, the zone in which the maximum uplift occurs clearly is at a different location from that of the zone with the maximum residual subsidence. There is no clear sign that the amount of mining underneath affects the residual subsidence, and there is no indication that the process of uplift is linked directly to the mining characteristics. It is more likely that uplift as the result of flooding is initiated at, or close to, the vertical shafts.

  20. Respirable quartz hazard associated with coal mine roof bolter dust

    Energy Technology Data Exchange (ETDEWEB)

    Joy, G.J.; Beck, T.W.; Listak, J.M. [National Inst. for Occupational Safety and Health, Pittsburgh, PQ (United States)

    2010-07-01

    Pneumoconiosis has been reported to be increasing among underground coal miners in the Southern Appalachian Region. The National Institute for Occupational Safety and Health conducted a study to examine the particle size distribution and quartz content of dust generated by the installation of roof bolts in mines. Forty-six bulk samples of roof bolting machine pre-cleaner cyclone dump dust and collector box dust were collected from 26 underground coal mines. Real-time and integrated airborne respirable dust concentrations were measured on 3 mining sections in 2 mines. The real-time airborne dust concentrations profiles were examined to identify any concentration changes that might be associated with pre-cleaner cyclone dust discharge events. The study showed that bolter dust is a potential inhalation hazard due to the fraction of dust less than 10 {mu}m in size, and the quartz content of the dust. The pre-cleaner cyclone dust was significantly larger than the collector box dust, indicating that the pre-cleaner functioned properly in removing the larger dust size fraction from the airstream. However, the pre-cleaner dust still contained a substantial amount of respirable dust. It was concluded that in order to maintain the effectiveness of a roof bolter dust collector, periodic removal of dust is required. Appropriate work procedures and equipment are necessary to minimize exposure during this cleaning task. 13 refs., 3 tabs., 2 figs.

  1. Research on water pollution induced by coal mining

    Energy Technology Data Exchange (ETDEWEB)

    Wu, Q.; Dong, D.; Fu, Y.; Bai, X.; Sun, Z. [China University of Mining and Technology, Xuzhou (China). Dept of Resource Exploitation Engineering

    2002-01-01

    Water environment problems induced by mining were studied. Influences of coal mining on runoff of rivers and on water sources were discussed. And the forming mechanism of acid water was analysed. The result shows that the mining activity is gradually changing the co-environment of adjacent areas, especially the water. With the water sources being continually polluted, the underground water has some poisonous or harmful ions in the process of dynamic exchange of water. The falling level of water table results in an increase of depression cone, and the seepage of rivers and the increasing range of acid water have more or less influence on water sources. All these are threatening the normal life of human beings. 11 refs., 2 figs.

  2. Fiber Bragg grating (FBG) sensors used in coal mines

    Science.gov (United States)

    Wang, Jinyu; Liu, Tongyu; Song, Guangdong; Xie, Hongjing; Li, Lianqing; Deng, Xiaolin; Gong, Zhijie

    2014-06-01

    The fiber Bragg grating (FBG) strain sensors were used for on-line monitoring of the stress variation of the lined wall in the gateway retained along the goaf of No. 3203 coal mining face in Dongtan Mine. The results showed that the FBG strain sensor with the wide measuring range could measure the stress variation accurately during the support process of the gateway retained along the goaf and could provide the basis to further optimize the support structure and to determine the support plan of the gateway retained along the goaf. The FBG micro-seismic sensors were used in Xinglong Mine to detect the micro-seismic signal. The signals were well received and analyzed to determine the location and energy level of the source of the micro-seismic event warning. The FBG sensors and detecting system show a significant potential for micro-seismic detection and geological disasters detection.

  3. Brine disposal process for Morcinek coal mine

    Energy Technology Data Exchange (ETDEWEB)

    Tait, J.H. [Aquatech Services, Inc., Citrus Heights, CA (United States)

    1995-04-01

    This paper describes the work to develop a commercial brine disposal process for the Morcinek mine, located 45 km south of the city of Katowice in Poland. Currently, brine is discharged into the Odra river and methane from the mine is released into the atmosphere. The process would use the released methane and convert a large percentage of the brine into potable water for commercial use. Thus, the proposed process has two environmental benefits. The brine salinity is about 31,100 ppm. Major brine components are Na (10,300 ppm), Ca (1,170 ppm), Mg (460 ppm), Cl (18,500 ppm) and SO{sub 4}{sup 2-} (252 ppm). Present in smaller amounts are K, S, Sr, B, Ba and NO{sub 3}. The process integrates a reverse osmosis (RO) unit and a submerged combustion evaporator. Extensive studies made at the Lawrence Livermore National Laboratory established the pretreatment method of the brine before it enters the RO unit. Without adequate pretreatment, mineral phases in the brine would become super-saturated and would precipitate in the RO unit. The pretreatment consists of first adding sodium carbonate to increase both the pH and the carbonate concentration of the brine. This addition causes precipitation of carbonate solids containing Ca, Mg, Sr, and Ba. After filtration of these precipitates, the fluid is acidified with HCl to prevent precipitation in the RO unit as the brine increases in salinity.

  4. Yampa coal field combined leased areas and mined-out areas, Colorado Plateau (yam*leasg)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — These are shapefiles and coverages that represent areas of combined State and Federal coal leases and mined-out areas in the Yampa coal field. Yamaleasg contains...

  5. The spatiotempora variations rules of Songzao coal mining subsidence based on numerical simulation

    OpenAIRE

    Lu, J.; Li, Y.; Cheng, H.; Tang, Z.(University of Science & Technology of China, Hefei, 230026, China)

    2015-01-01

    With the increasing demand of coal, coal mining at Songzao makes the area of land subsidence growing larger. Land subsidence in coal mining area not only made large subsided farmland out of production and caused the enormous loss to local agricultural production, but also brought a number of serious problems to the local social economy and ecology Environment. To use Probability-integral Method based on numerical simulation of Songzao Mine, its subsidence simulation data fro...

  6. The stability indexes of branched airflow of ventilation network in coal mine

    Institute of Scientific and Technical Information of China (English)

    TAN Yun-zhen; ZHAO Wen-bin; SHANG Yan-dong; XU Wen-zhong

    2007-01-01

    The stability of branched airflow of ventilation network is guarantee of safety in production of coal mine. Two indexes which stand for the stability of branches of ventilation network in coal mine were put forward in this paper, that are airflow intensity and stability index of branched airflow. The airflow stability of working place was divided into different grade according to the stability index. The conclusion has great significance for safety in production of coal mine.

  7. Injection of FGD Grout to Abate Acid Mine Drainage in Underground Coal Mines

    Energy Technology Data Exchange (ETDEWEB)

    Mafi, S.; Damian, M.T.; Senita, R.E.; Jewitt, W.C.; Bair, S.; Chin, Y.C.; Whitlatch, E.; Traina, S.; Wolfe, W.

    1997-07-01

    Acid Mine Drainage (AMD) from abandoned underground coal mines in Ohio is a concern for both residents and regulatory agencies. Effluent from these mines is typically characterized by low pH and high iron and sulfate concentrations and may contaminate local drinking-water supplies and streams. The objective of this project is to demonstrate the technical feasibility of injecting cementitious alkaline materials, such as Flue Gas Desulfurization (FGD) material to mitigate current adverse environmental impacts associated with AMD in a small, abandoned deep mine in Coshocton County Ohio. The Flue Gas Desulfurization material will be provided from American Electric Power`s (AEP) Conesville Plant. It will be injected as a grout mix that will use Fixated Flue Gas Desulfurization material and water. The subject site for this study is located on the border of Coshocton and Muskingum Counties, Ohio, approximately 1.5 miles south-southwest of the town of Wills Creek. The study will be performed at an underground mine designated as Mm-127 in the Ohio Department of Natural Resources register, also known as the Roberts-Dawson Mine. The mine operated in the mid-1950s, during which approximately 2 million cubic feet of coal was removed. Effluent discharging from the abandoned mine entrances has low pH in the range of 2.8-3.0 that drains directly into Wills Creek Lake. The mine covers approximately 14.6 acres. It is estimated that 26,000 tons of FGD material will be provided from AEP`s Conesville Power Plant located approximately 3 miles northwest of the subject site.

  8. "Productivity Change and Mine Dynamics: The Coal Industry in Japan during World War II"

    OpenAIRE

    Tetsuji Okazaki

    2012-01-01

    In the 1930s and 1940s, the Japanese coal industry experienced huge fluctuations in production and labor productivity. In this paper, I explore the micro-aspects of labor productivity change in the coal industry during World War II, using mine-level data, compiled from official statistics and original documents of the Coal Control Association (Sekitan Toseikai). The coal industry in this period was characterized by dynamic changes in market structure: a number of mines entered and exited the ...

  9. Study on the detection of geological structure in coal mine using radon-measuring method

    International Nuclear Information System (INIS)

    The presented radon-measuring method is a new technique in nuclear geophysics. By using this technique, hidden fracture, hidden depressed column, empty-hollow of old coal pit and growth region of water-containing fracture or crevice in bottom of coal seam can be detected in coal mine. The test results have proved that the technique is a fast, flexible and economical radioactive geophysical method, which can play a crucial role in coal mine geology

  10. Controlling and Evaluation on High Rock Slope Stability of Open-pit for Ash Storage%露天矿坑灰场岩质高边坡的稳定性评判与治理

    Institute of Scientific and Technical Information of China (English)

    吕言新; 乔卫国; 魏烈昌; 孟庆彬

    2011-01-01

    Slopes of open-pit mine and ash storage are likely to result in the geological disasters of landslides, collapse, ground deformation and so on, due to its geological structure and mining activities, etc. Laizhou Power Plant is going to use the open-pit of Cangshang gold mine as ash storage field. Therefore, the long-term stability of the slope is of great significance. Through the geological investigation and analysis of open-pit mine slope of Cangshang Mine, the geological and tectonic conditions of ash slopes are summarized. On the basis of field monitoring,the stability of the slopes is analyzed in detail The estimated results can better reflect the actual stability of the open-pit slope. Feasible treatment scheme is put forward according to the engineering practice.%露天矿坑边坡及排土场边坡,由于地质构造、采矿活动等原因极易诱发滑坡、塌陷、地面变形等地质灾害.莱州电厂拟采用仓上金矿矿坑作为灰场,边坡的长期稳定性有着重要的意义.通过对仓上矿坑边坡的工程地质调查与分析,总结了灰场边坡的地质条件和构造情况.在现场监测的基础上,对矿坑边坡的稳定性进行了详细的分析,所得的结果能较理想地反映该矿坑边坡的实际稳定程度,并根据工程的实际情况提出了切实可行的治理方案.

  11. Coal seam methane distribution and its significance in Pingdingshan mining area

    Institute of Scientific and Technical Information of China (English)

    郭德勇; 周心权; 沈少川; 张晓萍

    2002-01-01

    A study aimed at the coal seam group E and F in Pingdingshan mining area has been completed. This study is on the relationship of the coal-seam methane reserve to coal thickness, coal rank, coal seam depth, surrounding rock and geological structure and other factors. The study indicates that different geological factor plays different role in controlling the law of coal-seam methane reserve. The coal-seam methane rich area, which was formed because of various factors and comprehensive effect, is the coal and methane outburst-prone area, and also the key area for coal-bed methane recovery. Among all factors, coal seam depth and geological structure is more important factor in affecting coal-seam methane content in Pingdingshan mining area.

  12. Impact of Coal Mining on Self-Rated Health among Appalachian Residents

    Directory of Open Access Journals (Sweden)

    Shannon M. Woolley

    2015-01-01

    Full Text Available Objective. To determine the impact of coal mining, measured as the number of coal mining-related facilities nearby one’s residence or employment in an occupation directly related to coal mining, on self-rated health in Appalachia. Methods. Unadjusted and adjusted ordinal logistic regression models calculated odds ratio estimates and associated 95% confidence intervals for the probability of having an excellent self-rated health response versus another response. Covariates considered in the analyses included number of coal mining-related facilities nearby one’s residence and employment in an occupation directly related to coal mining, as well as potential confounders age, sex, BMI, smoking status, income, and education. Results. The number of coal mining facilities near the respondent’s residence was not a statistically significant predictor of self-rated health. Employment in a coal-related occupation was a statistically significant predictor of self-rated health univariably; however, after adjusting for potential confounders, it was no longer a significant predictor. Conclusions. Self-rated health does not seem to be associated with residential proximity to coal mining facilities or employment in the coal industry. Future research should consider additional measures for the impact of coal mining.

  13. Simulation Study and Probe on UWB Wireless Communication in Underground Coal Mine

    Institute of Scientific and Technical Information of China (English)

    WANG Yan-fen; WANG Zheng-gang; YU Hong-zhen

    2006-01-01

    From an analysis of the status of coal mine underground wireless communication, the application of UWB wireless communication system to underground coal mine is proposed. The basic composition of an UWB communication system and application in underground coal mines are introduced. The analyses show that, because of the transmission power being non-limitted in underground coal mines, the use of UWB in coal mines cannot only realize wireless access services of short distance high rate application for transmission of video monitoring signals, but also realize wireless access services of long distance low rate applications for mobile telephones in underground coal mines and parameters of working conditions monitoring, etc. It is emphasized on the simulation of a TH-PPM UWB communication system with traditional underground broadband model and ground CM1, CM3 model. It is shown that the traditional underground broadband model and ground CM1, CM3 models are not applicable to the UWB communication system in underground coal mines. It is necessary to conduct research on the propagation characteristics of UWB in coal mine tunnels, given the characteristics of the underground environment and to find the appropriate UWB model for underground coal mines.

  14. Land reclamation in the refuse dump of open coal mines and its following ecology principle

    Institute of Scientific and Technical Information of China (English)

    FAN Jun-fu; WANG Xiu-lan

    2006-01-01

    Through the research on the model of the land reclamation in the refuse dump of Heidaigou open coal mines, it was concerned that ecology was the theoretical basic for the land reclamation of open coal mines. According to the principle of ecological substituting, the land reclamation can be divided into three stages: water and soil conservation,ecological performance and economic performance. Taking the land reclamation in the refuse dump of Heidaigou open coal mines as the practical example, explained the application of the ecological substituting principle on the land reclamation in the open coal mines.

  15. Status quo and prospect of the development for underground coal mine refuge chamber

    Institute of Scientific and Technical Information of China (English)

    Ming-bo PIAO; Jun MAO; Tie-jun WANG

    2013-01-01

    As one form of the energy resources,coal is becoming more and more important.Due to the particularity in coal mine production,mine accidents some time occur in countries all over the world,which result in large casualties and economic losses.As equipment that can provides the miners with an emergency shelter when the coal mine accidents occur,the underground coal mine refuge chamber is paid more and more attention by coal mine enterprises,and the application of the refuge chamber is increasingly widespread.The general functions,the classification,and the successful applications of the underground coal mine refuge chamber are illustrated first,and the research significance on the underground coal mine refuge chamber is stated.Following,the development status quo at home and abroad for the refuge chamber is introduced.Then,the implementation methods for the key functions of the underground coal mine refuge chamber are demonstrated.Finally,the prospect for the development of the underground coal mine refuge chamber is stated.

  16. Destress Blasting in Coal Mining – State-of-the-Art Review

    OpenAIRE

    P. Koníček; Saharan, M.R.; Mitri, H.

    2011-01-01

    Coal mine workings continue to face the challenges of coal bumps and rockbursts caused by high mining-induced stresses due to high overburden pressures associated with the extraction of brittle, low strength coal seams. Despite of the fact that destress blasting has been applied for almost a century, it is still not a popular choice. This paper presents a state-of-the-art review of destress blasting in coal mining. Information such as geology, rock properties, mining conditions as well as bla...

  17. Effects of caving-mining ratio on the coal and waste rocks gangue flows and the amount of cyclically caved coal in fully mechanized mining of super-thick coal seams

    Institute of Scientific and Technical Information of China (English)

    Zhang Ningbo; Liu Changyou; Pei Mengsong

    2015-01-01

    Aimed at determining the appropriate caving–mining ratio for fully mechanized mining of 20 m thick coal seam, this research investigated the effects of caving–mining ratio on the flow fields of coal and waste rocks, amount of cyclically caved coal and top coal loss by means of numerical modeling. The research was based on the geological conditions of panel 8102 in Tashan coal mine. The results indicated the loose coal and waste rocks formed an elliptical zone around the drawpoint. The ellipse enlarged with decreasing caving–mining ratio. And its long axis inclined to the gob gradually became vertical and facil-itating the caving and recovery of top coal. The top coal loss showed a cyclical variation;and the loss cycle was shortened with the decreasing in caving–mining ratio. Moreover, the mean squared error (MSE) of the amount of cyclically caved coal went up with increasing caving–mining ratio, indicating a growing imbalance of amount of cyclically caved coal, which could impede the coordinated mining and caving operations. Finally it was found that a caving–mining ratio of 1:2.51 should be reasonable for the conditions.

  18. CHINA'S RECENT DEVELOPMENT IN COAL MINING,PROCESSING AND UTILIZATION

    Institute of Scientific and Technical Information of China (English)

    范维唐; 王成龙; 朱德仁

    1996-01-01

    This paper describes the state-of-the-art and outlook of coal mining and clean coal echnology in China. As the major mining method,underground mining accounts for 96% of the total production. Among the state own mines, the percentage of mechanized mining reached 71%. A rapid development of high-productive and high-profitable mines,especially those with longwall sublevel caving method, is described. The issues of heavy duty equipment, roof bolting, mine safety are also addressed. The Chinese government is paying more and more attention on the environmental problems inducing from coal mining,processing and utilization. A basic framework of clean coal technology is being formed and a wide range of technology is included.

  19. Research on the Factors of Fatigue of Coal Mine Workers and Its Control Measures

    OpenAIRE

    Zhang Jing-Gang; Wu Lei

    2013-01-01

    China is the largest coal producer in the world, it play a important role in the international field of coal production, but due to the frequent occurrence of coal mining accidents, it cause a enormous damage to the state's manpower and material resources. This article on research of the cause of the coal mining accident, it describes the fatigue of the coal mine workers assignment is the main cause of the accident and the threat to the safety of workers, and points out the important factors ...

  20. Statistical Analysis of Sino-U.S. Coal Mining Industry Accidents

    OpenAIRE

    Guiling Wei

    2011-01-01

    Both China and the United States are large countries in coal production and consumption, however, the safety conditions of coal mining production in China are much worse than that of the U.S.. Although the Chinese Administration of Coal Mine Safety improved safety measures to tighten control on coal mining industry, the number of accidents, death toll and fatality rate per million tons were much higher than those of the U.S. in recent years. Based on the statistical analysis of Sino-U.S. coal...

  1. Decision support system of coal mine planning using system dynamics model

    OpenAIRE

    Sontamino, Phongpat

    2015-01-01

    Coal is a fossil fuel mineral, which is presently a major source of electricity and energy to industries. From past to present, there are many coal reserves around the world and large scale coal mining operates in various areas such as the USA, Russia, China, Australia, India, and Germany, etc. Thailand’s coal resources can be found in many areas; there are lignite mining in the north of Thailand, the currently operational Mae Moh Lignite Mine, and also coal reserves in the south of Thailand,...

  2. The effect of China's globalisation on the South African coal mining equipment (OEM) industry / Ramona Naidoo

    OpenAIRE

    Naidoo, Ramona

    2007-01-01

    The study looks at the mining equipment industry as coal mining equipment is a subsector within this industry. This study seeks to create an understanding of how the coal mining equipment industry in South Africa is affected by the emergence of China as a mining equipment supplier. China's globalisation is set to continue and will impact all industries. China's African Policy will also impact the African continent, as China will continue to invest and use Africa's mineral resources. Sourcing ...

  3. Spontaneous combustion of coal and its early detection on OKR mines

    OpenAIRE

    Guřanová, Pavla

    2008-01-01

    Occurrence of spontaneous combustion of coal in OKR (Ostrava-Karvina Coal Field) still represents current problems worthy of solution. In OKR mining operations it is necessary to minimize permanently a risk of endogenous fire and its consequences to which as well a potential risk of possible initiation of air-methane mixture belongs that could lead to serious consequences in the form of mine accident accompanied by losses of human lives. The valid mining legislation of the Czech Mining Office...

  4. Application of coal mine dynamic safety management and occupational health and safety management system

    Institute of Scientific and Technical Information of China (English)

    ZHANG Hua; WANG Chun-qiu; CAO Qing-gui; LIU Ye-jiao; LIN Xiao-fei

    2007-01-01

    A method system was put forward based on the occupational health and safety management system to develop the dynamic safety management of coal mine. It aimed at the problems in the mining safety management and was put in practice in Lingxin coal mine of Ningxia Coal Industry Group Co., Ltd.. And good effect was obtained in safety work. It developed the mining dynamic safety management based on the building of occupational health and safety management system of mining enterprise and its main contents are as follows: timely identification and dynamic control of accident risk, persistent improvement of safety management performance according to the "PDCA" circle.

  5. Underground Coal Mining: Relationship between Coal Dust Levels and Pneumoconiosis, in Two Regions of Colombia, 2014

    OpenAIRE

    Carlos Humberto Torres Rey; Milciades Ibañez Pinilla; Leonardo Briceño Ayala; Diana Milena Checa Guerrero; Gloria Morgan Torres; Helena Groot de Restrepo; Marcela Varona Uribe

    2015-01-01

    In Colombia, coal miner pneumoconiosis is considered a public health problem due to its irreversibility, high cost on diagnosis, and lack of data related to its prevalence in the country. Therefore, a cross-sectional study was carried out in order to determine the prevalence of pneumoconiosis in underground coal mining workers in two regions of Colombia. The results showed a 35.9% prevalence of pneumoconiosis in the study group (42.3% in region 1 and 29.9% in region 2). An association was fou...

  6. Analysis on Backfill Mining of “Under Three” Coal in Zhouyuanshan Mine and Strata Movement Law

    Directory of Open Access Journals (Sweden)

    Weijian Yu

    2013-09-01

    Full Text Available In order to solve the problem of "under three" (under railways, buildings and water bodies coal pillar mining, analysis on backfill mining and strata movement law is carried on in 24 mining district of Zhouyuanshan coal mine. First of all, according to the engineering geology and strata occurrence condition in 24 mining district of Zhouyuanshan coal mine, FLAC2D software be used to establish a two-dimensional numerical model and to analyze and calculate the full caving method, strip method and backfill method and then gaining that backfill mining method is beneficial to improve the protection level of surface buildings and facilities. Then, using the theory of strata control and method of related mechanics to analyze the strata movement law and strata control principle of backfill mining, considering that supporting role of backfill body is mainly on lateral reinforcement of coal pillar and vertical supporting role of overlying strata, forming a cooperative control system of "bearing strata + coal pillar + backfill body" and deducing the equilibrium equations when it is in steady state. At last, using the numerical analysis method, respectively analyzing the surface subsidence of the corresponding important buildings of the three profiles of C-8 exploration line ,C-6 exploration line and A-A (cross section of the profile of C-8 exploration line after using backfill coal mining in 24 mining district. The results show that: the surface subsidence and horizontal deformation basically control within 30 mm and the surface deformation curvature of buildings generally in 0.1×10-3 /km in 24 mining district of Zhouyuanshan coal mine, which accord with the relevant standards and requirements.

  7. Impact of coal mining subsidence on farmland in eastern China

    International Nuclear Information System (INIS)

    This paper discusses damage characteristics of farmland due to coal mining subsidence in eastern China. The landscape of the mining subsidence trough has been divided into three zones; central zone, trough margin zone an dinner-edge zone. Each zone had a specific characteristic of deformation. The water accumulation, prone (downward sloping) land and fissures are typical damage characteristics of the subsidence landscape in eastern China. Based on soils analysis at different positions of the subsidence trough, the impact of mining subsidence on soil properties was identified. The physical properties of soil sensitive to mining subsidence were bulk density, water content and hydraulic conductivity, and they showed worsening form the top to the centre of the subsidence trough. Except for soil electrical conductivity, the tested soil chemical properties were not so sensitive to mining subsidence. They may however change after subsidence. An accumulation of salt was found in both new and old subsidence areas and the old subsidence area had a higher salt content. The soil biomass C in newly subsided land showed a decreasing trend from the top to the centre of the subsidence trough, but no obvious trend was observed in the old subsidence areas. Based on the soil analysis of subsided land, soil erosion was identified as a serious problem, most severe in the middle of the prone land. 4 refs., 5 figs., 1 tab

  8. Numerical simulation and damage analysis of fissure field evolution law in a single coal seam mining

    Institute of Scientific and Technical Information of China (English)

    Feng Gao; Xingguang Liu; Chaofeng Ge; Hongmei Cheng

    2012-01-01

    Based on the different deformation and failure laws of coal and rock materials under tensile or compressive loads,the damage variable was defined to divide three phases from the damage and rupture point of view in order to reveal the fissured field evolution characteristics and spatial distribution of coal and rock in the single coal seam mining with low permeability and rich methane.According to the corresponding damage constitutive equations,the secondary development of the finite element program was completed.The fissures field evolution law of a coal mine with single coal seam mining was calculated and analyzed by this new program and the distribution areas and failure degree of the surrounding coal and rock structures with damage,fissure or rupture are given on the condition of mining.This paper provides a scientific basis for quantitative research and evaluation of the safe simultaneous production of coal and gas.

  9. Impact of karst water on coal mining in North China

    Science.gov (United States)

    Li, Gongyu; Zhou, Wanfang

    2006-01-01

    Coalfields in North China encompass more than ten Provinces. They contain six to seven coal seams in the Permo-Carboniferous strata. The lower three seams account for 37% of the total reserves and are threatened with intrusion of karst water from the underlying Ordovician limestone. Hundreds of water inrush incidences have occurred, in which a large amount of water suddenly flows into tunnels or working faces under high potentiometric pressure. Over 50 mines have been flooded over the last 30 years. Large-scale dewatering or depressurizing of the karst aquifer was considered essential to avoid water inrushes and keep the mines safely operational. This practice, however, has caused sinkholes, dry springs, water supply shortage, and groundwater contamination in the surrounding areas. One alternative water control measure is to make full use of the rock layer between the coal seam and the karst aquifer as a protective barrier to prevent or constrain water flow from the underlying aquifer into the mines. Grouting is effective when the hydrogeological conditions are favorable to this technique. Proper design of the grouting program and experience of the contractor are also important for a successful application.

  10. Differential radon measurements for outburst prediction in coal mines

    International Nuclear Information System (INIS)

    In some areas, coal mines are subject to occasional outbursts consisting mainly of carbon dioxide or methane and coal dust. These vary widely in severity, but can cause loss of life. There are several techniques which may permit prediction of the outbursts. These include monitoring acoustic signals or continuous measurement of methane, carbon dioxide or radon concentrations. While it is not expected that any one will be adequate on its own, each technique is being studied so that a combination of all can be evaluated. This paper presents an experiment in which the concentration of radon in underground air is measured with high precision upon entry to and leaving a work face. This was considered the most practicable way to detect any radon flux anomalies preceding an outburst in a working mine. There are many practical difficulties in mounting an experiment in an active mine because of the dusty, wet conditions and because of the need for rigorous safety requirements in an environment which may contain an explosive mixture of air and methane. Details of the development of suitable equipment are given, and an analysis made of the first two months of operation. (author)

  11. Hydrochemical and geochemical processes in superficial dump sediments in Zwenkau open brown coal mine; Hydro- und geochemische Prozesse in oberflaechennahen Kippensedimenten des Braunkohlentagebaus Zwenkau

    Energy Technology Data Exchange (ETDEWEB)

    Wiegand, U.

    2002-07-01

    The present study was performed as part of a project titled ''Ground and air-based spectrometric studies for the differentiation of reactively altered brown coal open mining areas in Central Germany'' (Project 02 WB 9667/5) which was funded by the Federal Ministry for Education and Research. It was carried out as a cooperation between GeoForschungszentrum Potsdam (GFZ, Potsdam GeoResearch Centre), Deutsches Zentrum for Lust- und Raumfahrt (DLR, German Aerospace Centre), Gesellschaft fuer Angewandte Fernerkundung (GAF, Society for Applied Remote Sensing) and Umweltforschungszentrum Leipzig/Halle GmbH (UFZ, Leipzig/Halle Environmental Research Centre). The idea of the project was to calibrate aerial data obtained by means of spectrometric remote sensing methods using conventional petrographic, mineralogical and geochemical analysis. This would provide the mining industry with a powerful method with low time and staff requirement for reliably classifying the vast dump areas produced by open pit mining, accurately assigning findings to location data and thus identifying suitable uses for different sites. The focus of the present study was on characterising hydrochemical and geochemical alterations in dump sediments of the Zwenkau brown coal open mining area south of Leipzig in Central Germany. The collection of these data plays a decisive role in plans for cultivating and assessing the potential hazard to the open mining landscape. [German] Die vorliegende Arbeit wurde im Rahmen des BMBF-gefoerderten Projektes 'Luft- und bodengestuetzte spektrometrische Untersuchungen zur Differenzierung reaktiv veraenderter Braunkohlentagebaugebiete in Mitteldeutschland' (Vorhaben 02 WB 9667/5) als Kooperation zwischen dem GeoForschungsZentrum Potsdam (GFZ), dem Deutschen Zentrum fuer Luft- und Raumfahrt (DLR), der Gesellschaft fuer Angewandte Fernerkundung (GAF) und dem Umweltforschungszentrum Leipzig/Halle GmbH (UFZ) angefertigt. Idee des Projektes war

  12. Effects of Re-vegetation on Herbaceous Species Composition and Biological Soil Crusts Development in a Coal Mine Dumping Site

    Science.gov (United States)

    Zhao, Yang; Zhang, Peng; Hu, Yigang; Huang, Lei

    2016-02-01

    Despite the critical roles of plant species' diversity and biological soil crusts (BSCs) in arid and semi-arid ecosystems, the restoration of the diversity of herbaceous species and BSCs are rarely discussed during the process of vegetation restoration of anthropogenically damaged areas in these regions. In this study, the herbaceous plant species composition, along with the BSCs coverage and thicknesses, was investigated at six different re-vegetation type sites, and the natural vegetation site of the Heidaigou open pit coal mine in China's Inner Mongolia Autonomous Region was used as a reference. The highest total species richness (16), as well as the species richness (4.4), occurred in the Tree and Herbaceous vegetation type site. The species composition similarities between the restored sites and the reference site were shown to be very low, and ranged from 0.09 to 0.42. Also, among the restored sites, the similarities of the species were fairly high and similar, and ranged from 0.45 to 0.93. The density and height of the re-vegetated woody plants were significantly correlated with the indexes of the diversity of the species. The Shrub vegetation type site showed the greatest total coverage (80 %) of BSCs and algae crust coverage (48 %). The Shrub and Herbaceous type had the greatest thicknesses of BSCs, with as much as 3.06 mm observed, which was followed by 2.64 mm for the Shrub type. There was a significant correlation observed between the coverage of the total BSCs, and the total vegetation and herbaceous vegetation coverage, as well as between the algae crust coverage and the herbaceous vegetation coverage. It has been suggested that the re-vegetated dwarf woody plant species (such as shrubs and semi-shrubs) should be chosen for the optimal methods of the restoration of herbaceous species diversity at dumping sites, and these should be planted with low density. Furthermore, the effects of vegetation coverage on the colonization and development the BSCs

  13. Effects of Re-vegetation on Herbaceous Species Composition and Biological Soil Crusts Development in a Coal Mine Dumping Site.

    Science.gov (United States)

    Zhao, Yang; Zhang, Peng; Hu, Yigang; Huang, Lei

    2016-02-01

    Despite the critical roles of plant species' diversity and biological soil crusts (BSCs) in arid and semi-arid ecosystems, the restoration of the diversity of herbaceous species and BSCs are rarely discussed during the process of vegetation restoration of anthropogenically damaged areas in these regions. In this study, the herbaceous plant species composition, along with the BSCs coverage and thicknesses, was investigated at six different re-vegetation type sites, and the natural vegetation site of the Heidaigou open pit coal mine in China's Inner Mongolia Autonomous Region was used as a reference. The highest total species richness (16), as well as the species richness (4.4), occurred in the Tree and Herbaceous vegetation type site. The species composition similarities between the restored sites and the reference site were shown to be very low, and ranged from 0.09 to 0.42. Also, among the restored sites, the similarities of the species were fairly high and similar, and ranged from 0.45 to 0.93. The density and height of the re-vegetated woody plants were significantly correlated with the indexes of the diversity of the species. The Shrub vegetation type site showed the greatest total coverage (80%) of BSCs and algae crust coverage (48%). The Shrub and Herbaceous type had the greatest thicknesses of BSCs, with as much as 3.06 mm observed, which was followed by 2.64 mm for the Shrub type. There was a significant correlation observed between the coverage of the total BSCs, and the total vegetation and herbaceous vegetation coverage, as well as between the algae crust coverage and the herbaceous vegetation coverage. It has been suggested that the re-vegetated dwarf woody plant species (such as shrubs and semi-shrubs) should be chosen for the optimal methods of the restoration of herbaceous species diversity at dumping sites, and these should be planted with low density. Furthermore, the effects of vegetation coverage on the colonization and development the BSCs

  14. Coal and rock fissure evolution and distribution characteristics of multi-seam mining

    Institute of Scientific and Technical Information of China (English)

    Zhang Dongming; Qi Xiaohan; Yin Guangzhi; Zheng Binbin

    2013-01-01

    Henan Pingdingshan No.10 mine is prone to both coal and gas outbursts. The E9-10 coal seam is the main coal-producing seam but has poor quality ventilation, thus making it relatively difficult for gas extraction. The F15 coal seam, at its lower section, is not prone to coal and gas outbursts. The average seam separa-tion distance of 150 m is greater than the upper limit for underside protective seam mining. Based on borehole imaging technology for field exploration of coal and rock fracture characteristics and discrete element numerical simulation, we have studied the evolution laws and distribution characteristics of the coal and rock fissure field between these two coal seams. By analysis of the influential effect of group F coal mining on the E9-10 coal seam, we have shown that a number of small fissures also develop in the area some 150 m above the overlying strata. The width and number of the fissures also increase with the extent of mining activity. Most of the fissures develop at a low angle or even parallel to the strata. The results show that the mining of the F15 coal seam has the effect of improving the permeability of the E9-10 coal seam.

  15. Protocols for the remediation of lands impacted by former coal mining operations, Sydney coalfield, Nova Scotia, Canada

    Energy Technology Data Exchange (ETDEWEB)

    Forgeron, S. [Conestoga-Rovers and Associates, Sydney, NS (Canada)

    2010-07-01

    Abandoned underground coal mines can pose health and safety risks to persons working in close proximity to the former mining operations. This paper described protocols used to address potential coal mining hazards at the Sydney coal field in Nova Scotia (NS). The protocols document was developed by a mine workings group consisting of government agencies, consultants, and the owners of the mine site. Hazards at the mine included unstable ground caused by the collapse of abandoned coal mine workings; unsecured abandoned mine openings; potential accidental discharges of untreated mine waters; and the potential release of hazardous mine gases. A 5 remediation protocol process was established to include (1) information gathering, (2) an initial mine site investigation, (3) a mine workings report, (4) a detailed mine site investigation, and (5) a mine openings remediation. The protocols can be used to identify the potential hazards posed during investigations and remediation activities. 26 refs., 1 fig.

  16. Update on respiratory disease from coal mine and silica dust

    Energy Technology Data Exchange (ETDEWEB)

    Cohen, R.; Velho, V. [Cooks City Hospital, Chicago, IL (USA)

    2002-12-01

    Excessive exposure to coal, coal mine, and silica dust causes a variety of pathological responses in susceptible hosts, including pulmonary fibrosis or pneumoconiosis and chronic obstructive pulmonary disease and their resultant restrictive, obstructive, or mixed pattern pulmonary function impairments. For many years, much of the discussion on the respiratory health effects of exposure to these dusts was restricted to the fibrosing pulmonary tissue reactions in response to retained dust. It excluded other reactions of the pulmonary parenchyma and airways to the dust, which are extremely important, and can result in significant impairment in sensitive individuals. This article discusses the broad spectrum of pulmonary toxicity to these inorganic dusts, clinical evaluation, and management of patients with respiratory disease from dust exposure, as well as the association between silica exposure and an increased risk of pulmonary malignancy.

  17. Surface Movement Regularity of Super-Wide Mining Face With Top-Coal Caving

    Institute of Scientific and Technical Information of China (English)

    REN Run-hou

    2005-01-01

    No.4326 super-wide panel of Wangzhuang Coal Mine ( in which the fully-mechanized top-coal caving longwall mining method was used) was monitored for dynamic characteristic of surface movement. The dynamic surface movement in and after mining was predicted by using the Mining Subsidence Prediction System. The results indicate that after mining, the surface above the super-wide panel reaches a state of full subsidence, making the No.309national highway above the panel be located on the flat bottom of the subsidence basin so that the influence of mining activity in both sides of 4326 panel on the national highway is the smallest.

  18. Distribution of sulfur and pyrite in coal seams from Kutai Basin (East Kalimantan, Indonesia): Implications for paleoenvironmental conditions

    Energy Technology Data Exchange (ETDEWEB)

    Widodo, Sri [Department of Mining Engineering, Moslem University of Indonesia, Jln. Urip Sumoharjo, Makassar (Indonesia); Oschmann, Wolfgang [Institute of Geosciece, J.W. Goethe-University, Altenhoeferallee 1, D-60438 Frankfurt a.M. (Germany); Bechtel, Achim; Sachsenhofer, Reinhard F. [Department of Applied Geoscience and Geophysics, University of Leoben, Peter-Tunner-Str.5, A-8700 Leoben (Austria); Anggayana, Komang [Department of Mining Engineering, Bandung Institute of Technology, Jln. Ganesa 10, I-40132 Bandung (Indonesia); Puettmann, Wilhelm [Institute of Atmospheric and Environmental Sciences, Dapartment of Analytical Enviromental Chemistry, J.W. Goethe-University, Altenhoeferallee 1, D-60438 Frankfurt a.M. (Germany)

    2010-03-01

    Thirteen Miocene coal samples from three active open pit and underground coal mines in the Kutai Basin (East Kalimantan, Indonesia) were collected. According to our microscopical and geochemical investigations, coal samples from Sebulu and Centra Busang coal mines yield high sulfur and pyrite contents as compared to the Embalut coal mine. The latter being characterized by very low sulfur (< 1%) and pyrite contents. The ash, mineral, total sulfur, iron (Fe) and pyrite contents of most of the coal samples from the Sebulu and Centra Busang coal mines are high and positively related in these samples. Low contents of ash, mineral, total sulfur, iron (Fe) and pyrite have been found only in sample TNT-32 from Centra Busang coal mine. Pyrite was the only sulfur form that we could recognize under reflected light microscope (oil immersion). Pyrite occurred in the coal as framboidal, euhedral, massive, anhedral and epigenetic pyrite in cleats/fractures. High concentration of pyrite argues for the availability of iron (Fe) in the coal samples. Most coal samples from the Embalut coal mine show lower sulfur (< 1 wt.%) and pyrite contents as found within Centra Busang and Sebulu coals. One exception is the coal sample KTD-38 from Embalut mine with total sulfur content of 1.41 wt.%. The rich ash, mineral, sulfur and pyrite contents of coals in the Kutai Basin (especially Centra Busang and Sebulu coals) can be related to the volcanic activity (Nyaan volcanic) during Tertiary whereby aeolian material was transported to the mire during or after the peatification process. Moreover, the adjacent early Tertiary deep marine sediment, mafic igneous rocks and melange in the center of Kalimantan Island might have provided mineral to the coal by uplift and erosion. The inorganic matter in the mire might also originate from the ground and surface water from the highland of central Kalimantan. (author)

  19. The historical effects of coal mining on the hydrology of Appalachia

    Science.gov (United States)

    Ruffing, C. M.; Wreschnig, A. J.; Bain, D. J.; Hermans, C. M.; McCormack, S. M.; Urbanova, T.

    2009-12-01

    The Appalachian Mountains, a region known for its rich coal deposits, is also the headwaters to most important river systems draining to the Atlantic Ocean. Coal mined from the Appalachian’s was fundamental to the industrialization of the United States during the nineteenth and early twentieth centuries. Deforestation and waste disposal associated with deep mining were common throughout the region. Anecdotal evidence suggests that historic coal mining had a significant influence on the region’s hydrology. There is a growing body of literature examining the effects of contemporary mining activity on hydrologic systems, but few studies have quantified historic impacts. This study examines the extent of coal mining activity in Appalachia during the first era of increased coal production (1865 - 1929). Areas within the region most affected by mining activity were identified using dates of published mine maps and coal production data for the region. Intensively mined areas were paired with relatively unaffected stream basins to address the influence of mining on hydrology, and particularly legacy effects. This study will inform future studies exploring common mine-related environmental issues in Appalachia such as acid mine drainage and subsidence.

  20. Coal Mining vis-â-vis Agriculture in India: A Question of Sustainability

    Directory of Open Access Journals (Sweden)

    Sribas Goswami

    2015-01-01

    Full Text Available Coal mining adversely affects the eco-system as a whole. It is important to conduct suitable assessment studies to learn the potential adverse impact of mining on agriculture. In the subsequent discussions an attempt has been made to clarify the coal mining activities and its residual impact on environment and agricultural activities.The leaseholds for the underground mines are procured from the land lords who grant mining authority the right for underground coal mining. The land for houses, dwellings and the associated activities are purchased piecemeal from different sources while large portion of the surface right remained under the control of farmers and landlords. Underground mining in these areas is conducted with full responsibility of the surface protection by the operators who normally maintain pillars as the natural support to the surface features. Increasing demand for open caste mining process requires huge land. These lands sometime are acquired at the cost of cultivable land. Coal mining has direct impact over agriculture in the study region and residual impacts of mining bring far reaching consequences. The present study is explanatory in nature based on empirical facts collected from various formal sources from Coal India office. The task is to bring out the issues related to coal mining activities and their impact on vegetation and agriculture in adjoining areas in Raniganj and Jharia coalfields in India through this study.

  1. Situation of coal mining in the Federal Republic of Germany. Year 2014; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. Jahr 2014

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2015-03-10

    The paper reports on the coal mining in the Federal Republic of Germany in the year 2014. Statistical data are presented for coal market, brown coal mining as well as the hard coal mining. These data consider the supply and demand of coal in Germany, and employees of the German coal industry.

  2. Coal mining situation in the Federal Republic of Germany. Year 2015; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. Jahr 2015

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2016-03-08

    The paper reports on the coal mining in the Federal Republic of Germany in the year 2015. Statistical data are presented for coal market, brown coal mining as well as the hard coal mining. These data consider the supply and demand of coal in Germany, and employees of the German coal industry.

  3. A Study on Preventing Spontaneous Combustion of Residual Coal in a Coal Mine Goaf

    Directory of Open Access Journals (Sweden)

    Yongjun Wang

    2015-01-01

    Full Text Available The effectiveness of grouting scheme has been simulated to prevent the coal spontaneous combustion at a goaf in Haizi Colliery, China. The colliery has been operated for long period over 27 years and has a complex ventilation network including airflow leakages which could possibly lead to the spontaneous combustion of coal at goafs. Firstly, the mine ventilation simulator MIVENA was used to analyze the mine ventilation network airflows to control airflows in and out of working faces and goafs. As the second approach, numerical simulations were carried by the simulator FLUENT in order to predict spontaneous combustion of residual coal with leakage flow in the #3205 goaf. It was cleared that the goaf can be divided into three zones based on oxygen concentration in the goaf area. Finally, the numerical simulation results show that the slurry grouting method is able to be an effective and economical method by reducing porosity in the goaf area to prevent spontaneous combustion of residual coal.

  4. Fuzzy Evaluation of Coal Seam Geological Condition of Fully-Mechanized Face in Ten-Million-Ton Mine

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    Based on coal seam geological condition and mining technological characteristic in Jisan Mine, coal seam geological condition is quantitative evaluated by using fuzzy evaluation with the view of coal mining and coalface production. The structure and index system of evaluation factor, the membership functions and weights of evaluation factor, evaluation model and reliability in the coal seam geological conditions are expounded in detail. Eighty-two coalfaces which will be exploited is classified. All of these have provided a theoretical foundation for the selection of coal mining technology and for sustainable development of the coal mine.

  5. Treating coal mine drainage with an artificial wetland. [USA - Ohio

    Energy Technology Data Exchange (ETDEWEB)

    Fennessy, M.S.; Mitsch, W.J. (Ohio State University Columbus, OH (USA). School of Natural Resources)

    A 0.22-ha constructed wetland dominated by Typha latofolia was evaluated for its ability to treat approximately 340 L/min of coal mine drainage from an underground seep in eastern Ohio. Loading of mine drainage to the wetland ranged from 15 to 35 cm/d. Conductivity, pH, manganese, and sulfate were little changed by the wetland. Iron decreased by 50 to 60%, with slightly higher decreases during the growing season. Comparisons are made to a volunteer Typha marsh receiving mine drainage where iron was found to decrease by approximately 89%. Design considerations of loading rates of created wetlands suggest that improved treatment of mine drainage is correlated with longer retention times and lower iron loading rates. Preliminary design criteria for construction of these types of Typha wetlands for removal of iron are suggested as 5 cm/d hydrologic loading and 2 to 40 g Fe/m{sup 2}.d for iron loading, depending on the treatment desired. 34 refs., 8 figs., 5 tabs.

  6. Geotechnical risk management to prevent coal outburst in room-and-pillar mining

    Institute of Scientific and Technical Information of China (English)

    Zhang Peter⇑; Peterson Scott; Neilans Dan; Wade Scott; McGrady Ryan; Pugh Joe

    2016-01-01

    A coal outburst is a severe safety hazard in room-and-pillar mining under deep cover. It is more likely to occur during pillar retreating. Multi-seam mining dramatically increases the risk of coal outburst within the influence zones created by remnant pillars and gob-solid boundaries. Though coal outburst is gener-ally associated with heavy loading of coal pillars, its occurrence is difficult to predict. Risk management provides a proactive tool to minimize coal outburst in room-and-pillar mining under deep cover. Risk assessment is the first step in identifying and quantifying outburst risk factors. The primary risk factors for coal outburst are overburden depth, roof and floor strength, geological anomalies, mining type, multi-seam mining, and panel width. A risk assessment chart can be used to proactively screen out min-ing sections with high risk of coal outburst for further analysis. Gob-solid boundaries and remnant pillars are critical factors in evaluation of the coal outburst risk of multi-seam mining. Risk identification, risk assessment, geologic influence mapping, geotechnical evaluation, risk analysis, risk mitigation, and mon-itoring are essential elements of coal outburst risk management process. Training is an integral part of risk management for risk identification and communication between all the stakeholders including man-agement, technical and safety personnel, and miners.

  7. 76 FR 32951 - Coal Mining Equipment, Technologies and Services Trade Mission to China and Mongolia

    Science.gov (United States)

    2011-06-07

    ... International Trade Administration Coal Mining Equipment, Technologies and Services Trade Mission to China and... Commercial Service is organizing an Executive-led Trade Mission to China and Mongolia for U.S. companies... National Energy Administration, and with private-sector entrepreneurs at the China Coal & Mining Expo...

  8. Integral evaluation of operating quality and the deciding of management strategy in productive coal mines

    Institute of Scientific and Technical Information of China (English)

    ZHAO Jing-li(赵景礼)

    2004-01-01

    According to overall mean square root of weighted deviation, presented an evaluation model of "geology-technique-social conditions" with a significant index system for the estimation of operating quality in productive coal mines. In the given example, the evaluation result is used to decide management strategy of coal mine, which plays a guiding role in the production.

  9. 20 CFR 718.302 - Relationship of pneumoconiosis to coal mine employment.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Relationship of pneumoconiosis to coal mine...' TOTAL DISABILITY OR DEATH DUE TO PNEUMOCONIOSIS Presumptions Applicable to Eligibility Determinations § 718.302 Relationship of pneumoconiosis to coal mine employment. If a miner who is suffering...

  10. Coal mining situation in the Federal Republic of Germany. January to September 2015

    International Nuclear Information System (INIS)

    This publication presents statistical data on hard coal mining (production, stocks, performance per miner and shift, headcount, sales, foreign sales, imports) as well as brown coal mining (production, refining, headcount, domestic sales, imports) in Germany during the period from January through September 2015.

  11. 78 FR 45566 - Agency Information Collection Activities; Submission for OMB Review; Comment Request; Coal Mine...

    Science.gov (United States)

    2013-07-29

    ... the related notice published in the Federal Register on April 30, 2013 (78 FR 25308). This information...; Coal Mine Dust Sampling Devices ACTION: Notice. SUMMARY: The Department of Labor (DOL) is submitting..., ``Coal Mine Dust Sampling Devices,'' to the Office of Management and Budget (OMB) for review and...

  12. Effect of Water Invasion on Outburst Predictive Index of Low Rank Coals in Dalong Mine.

    Science.gov (United States)

    Jiang, Jingyu; Cheng, Yuanping; Mou, Junhui; Jin, Kan; Cui, Jie

    2015-01-01

    To improve the coal permeability and outburst prevention, coal seam water injection and a series of outburst prevention measures were tested in outburst coal mines. These methods have become important technologies used for coal and gas outburst prevention and control by increasing the external moisture of coal or decreasing the stress of coal seam and changing the coal pore structure and gas desorption speed. In addition, techniques have had a significant impact on the gas extraction and outburst prevention indicators of coal seams. Globally, low rank coals reservoirs account for nearly half of hidden coal reserves and the most obvious feature of low rank coal is the high natural moisture content. Moisture will restrain the gas desorption and will affect the gas extraction and accuracy of the outburst prediction of coals. To study the influence of injected water on methane desorption dynamic characteristics and the outburst predictive index of coal, coal samples were collected from the Dalong Mine. The methane adsorption/desorption test was conducted on coal samples under conditions of different injected water contents. Selective analysis assessed the variations of the gas desorption quantities and the outburst prediction index (coal cutting desorption index). Adsorption tests indicated that the Langmuir volume of the Dalong coal sample is ~40.26 m3/t, indicating a strong gas adsorption ability. With the increase of injected water content, the gas desorption amount of the coal samples decreased under the same pressure and temperature. Higher moisture content lowered the accumulation desorption quantity after 120 minutes. The gas desorption volumes and moisture content conformed to a logarithmic relationship. After moisture correction, we obtained the long-flame coal outburst prediction (cutting desorption) index critical value. This value can provide a theoretical basis for outburst prediction and prevention of low rank coal mines and similar occurrence conditions

  13. Effect of Water Invasion on Outburst Predictive Index of Low Rank Coals in Dalong Mine.

    Directory of Open Access Journals (Sweden)

    Jingyu Jiang

    Full Text Available To improve the coal permeability and outburst prevention, coal seam water injection and a series of outburst prevention measures were tested in outburst coal mines. These methods have become important technologies used for coal and gas outburst prevention and control by increasing the external moisture of coal or decreasing the stress of coal seam and changing the coal pore structure and gas desorption speed. In addition, techniques have had a significant impact on the gas extraction and outburst prevention indicators of coal seams. Globally, low rank coals reservoirs account for nearly half of hidden coal reserves and the most obvious feature of low rank coal is the high natural moisture content. Moisture will restrain the gas desorption and will affect the gas extraction and accuracy of the outburst prediction of coals. To study the influence of injected water on methane desorption dynamic characteristics and the outburst predictive index of coal, coal samples were collected from the Dalong Mine. The methane adsorption/desorption test was conducted on coal samples under conditions of different injected water contents. Selective analysis assessed the variations of the gas desorption quantities and the outburst prediction index (coal cutting desorption index. Adsorption tests indicated that the Langmuir volume of the Dalong coal sample is ~40.26 m3/t, indicating a strong gas adsorption ability. With the increase of injected water content, the gas desorption amount of the coal samples decreased under the same pressure and temperature. Higher moisture content lowered the accumulation desorption quantity after 120 minutes. The gas desorption volumes and moisture content conformed to a logarithmic relationship. After moisture correction, we obtained the long-flame coal outburst prediction (cutting desorption index critical value. This value can provide a theoretical basis for outburst prediction and prevention of low rank coal mines and similar

  14. MONITORING SOIL MOISTURE IN A COAL MINING AREA WITH MULTI-PHASE LANDSAT IMAGES

    OpenAIRE

    Kong, J. L.; T. Xian; Yang, J.; Chen, L.; X. T. Yang

    2016-01-01

    The coal development zone of Northern Shaanxi, China is one of the eight largest coal mines in the world, also the national energy and chemical bases. However, the coal mining leads to ground surface deformation and previous studies show that in collapse fissure zone soil water losses almost 50% compared with non-fissure zone. The main objective of this study is to develop a retrieval model that is reliable and sensitive to soil moisture in the whole coal mining zone of Northern Shaanxi based...

  15. Natural radioactivity level of associated bone-coal mining area in Zhejiang province

    International Nuclear Information System (INIS)

    The geographic distribution, γ-radiation level and specific activity of radionuclides of the bone-coal mines in Zhejiang Province were reported. The weighted average of γ-radiation dose rate of the bone-coal mines is 566 nGy/h for 107 main bone-coal mines. The weighted mean activity of 238U, 226Ra, 232Th and 40K in the samples are 949, 918, 34 and 554 Bq/kg for 171 samples of bone-coal, respectively. (authors)

  16. Natural radioactivity level of associated bone-coal mining area in Zhejiang Province

    Institute of Scientific and Technical Information of China (English)

    YE Ji-Da; ZHENG Hui-Di; SONG Wei-Li; ZENG Guang-Jian; WANG Sha-Ling; WU Zong-Mei

    2005-01-01

    The geographic distribution, γ-radiation level and specific activity of radionuclides of the bone-coal mines in Zhejiang Province were reported. The weighted average of γ-radiation dose rate of the bone-coal mines is 566 nGy/h for 107 main bone-coal mines. The weighted mean activity of 238U, 226Ra, 232Th and 40K in the samples are 949, 918, 34 and 554 Bq/kg for 171 samples of bone-coal, respectively.

  17. Proceedings, 88th regular meeting, The Rocky Mountain Coal Mining Institute. [USA - Rocky Mountains

    Energy Technology Data Exchange (ETDEWEB)

    Finnie, D.G. (ed.)

    1992-01-01

    The convention theme was: energizing America with coal. 12 papers were presented with the following titles: American coal and coal technology - energy to drive a world evolution; electric supply and demand in the US - the next 10 years; growth opportunities in electric generation in the 1990s; US Clean Coal Technology Program insuring coal's future as a utility through technology development; mining survival in parts per billion; organization, activities and issues with particular emphasis on coal; Lignite Coal Council update; developments in technology and markets for Wyoming coal; total involvement teams - going beyond participation; total quality management - is it for the mining industry; and productivity gainsharing. A summary of coal production data for 1990 and 1991 and a list of the RMCMI members and their addresses are included.

  18. Mines, Non-Coal (Active), mines, Published in 2008, 1:24000 (1in=2000ft) scale, Box Elder County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Mines, Non-Coal (Active) dataset, published at 1:24000 (1in=2000ft) scale, was produced all or in part from Other information as of 2008. It is described as...

  19. Variation in gas drainage rate from a coal seam during mining

    Institute of Scientific and Technical Information of China (English)

    Li; Gang; Qi; Qingxin; Li; Hongyan; Fan; Xisheng

    2012-01-01

    Gas flow patterns during draining of gas from a coal seam during mining are discussed.The coal seam is treated as a dual medium with both pores and cracks.The seepage,diffusion,and desorption processes are treated using a gas flow equation that describes flow around drill holes.MATLAB is used to solve the differential equations.The permeability tracer test results from a mined coal seam are used to study the variation in gas drainage from a coal seam during mining.The results show that mining can increase the permeability of a coal seam,which then increases the gas drainage.There are inflection points in this variation over time.A close relationship between this variation and the rate of change in coal seam permeability is observed.

  20. Preliminary study on regulatory limits of coal mines associated with radionuclides in Xinjiang

    International Nuclear Information System (INIS)

    In this paper, limits of radon concentration and gamma radiation dose rate of coal mines associated with radionuclide in Xinjiang were studied to provide theoretical bases in developing scientific and practical regulatory standards of radiation protection for coal mines associated with radionuclides. It is meaningful in strengthening the supervision to coal mines associated with radionuclides, boosting their development of exploitation and utilization, as well as the protection to the health of worker and public and the environment. It may also provide references in defining the limits of regulatory standards for NORMs associated mining and processing of ore resources. (authors)

  1. Predict gas emission quantity of mining coal face with improved Grey Markov model

    Energy Technology Data Exchange (ETDEWEB)

    Tao, Y.; Xu, J.; Li, S. [Chongqing University, Chongqing (China)

    2007-04-15

    In order to predict the absolute quantity of gas emission from a mining coal face, the improved grey model GM (1.1) was built based on dealing with the initial data of the gas emission quantity of mining coal face by natural logarithm. The improved Grey Markov prediction mode was built through uniting the improved grey mode (1.1) and the Markov model. This model was used to analyze and predict the gas emission quantity of the first mining coal face in Zhongling Mine, China. The forecast result of the Grey Markov predication model has better fitting precision and correct dependability. It can be generally employed. 6 refs., 5 tabs.

  2. Coal mining, social injustice and health: a universal conflict of power and priorities.

    Science.gov (United States)

    Morrice, Emily; Colagiuri, Ruth

    2013-01-01

    Given the current insatiable demand for coal to build and fuel the world's burgeoning cities the debate about mining-related social, environmental and health injustices remains eminently salient. Furthermore, the core issues appear universally consistent. This paper combines the theoretical base for defining these injustices with reports in the international health literature about the impact of coal mining on local communities. It explores and analyses mechanisms of coal mining related injustice, conflicting priorities and power asymmetries between political and industry interests versus inhabitants of mining communities, and asks what would be required for considerations of health to take precedence over wealth.

  3. Electromagnetic environments in roadways of underground coal mines and a novel testing method

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    The electromagnetic environment of laneways in underground coal mines is an important area for the design of new electronic products,as well as a fundamental space for mine monitoring,surveillance,communications and control systems.An investigation of electromagnetic interference in coal mines is essential for the enhancement of performances of these systems.In this study,a new field method is provided in which radiated emission tests in coal mine laneways have been carried out.We conclude that:1) the wirin...

  4. Microbial Methane Formation from Coal and Wood in Abandoned Coal Mines - Analogues for biogenic methane formation in Black Shales

    Science.gov (United States)

    Krüger, M.; Beckmann, S.; Engelen, B.; Cypionka, H.

    2009-04-01

    About seven percent of the global annual methane emissions originate from coal mining. Also, mine gas has come into focus of the power industry and is being used increasingly for heat and power production. In many coal deposits worldwide, stable carbon and hydrogen isotopic signatures of methane indicate a mixed thermogenic and biogenic origin. In this study, we have measured in an abandoned coal mine methane fluxes and isotopic signatures of methane and carbon dioxide, and collected samples for microbiological and phylogenetic investigations. Mine timber and hard coal showed an in-situ production of methane with isotopic signatures similar to those of the methane in the mine atmosphere. Enrichment cultures amended with mine timber or hard coal as sole carbon sources formed methane over a period of nine months. Predominantly, acetoclastic methanogenesis was stimulated in enrichments containing acetate or hydrogen/carbon dioxide. Molecular techniques revealed that the archaeal community in enrichment cultures and unamended samples was dominated by members of the Methanosarcinales. The combined geochemical and microbiological investigations identify microbial methanogenesis as a recent source of methane in abandoned coal mines. Overall, our new results support the assumption that abandoned coal reservoirs have a potential to supply methane gas for energy production over extended time scales. The worldwide increased mining activity will go along with an increased coal weathering and the formation of biogenic methane. Currently, our research is focussing on the question to which extent and for how long recent biogenic methane production is contributing to shale gas formation as another important future energy resource.

  5. Development trends in the Lusatian brown coal mining industry

    International Nuclear Information System (INIS)

    Lusatia has lived on and with brown coal for over 200 years. Brown coal changed what was once a region in which forestry and agriculture predominated into an industrial region. Thanks to its good combustion properties and high energy yield brown coal very soon became known and popular. It was always the driving force for a rapid development which resulted in an economically sound and technically up-to-date industry in Lusatia. This powerful status of brown coal was however soon exploited for aims which were bound to lead to the downfall of two social structures (during the years from 1933 to 1990) by reason of a regime of unconditional autarchy. The economic and technical development thus initiated certainly brought many advantages, but it also had serious diadvantages. Constant increases in production, as a result of which planned rated outputs were intentionally disregarded, were the rule because production targets had to be met or exceeded. Economic inefficiency led to a scarcity of labour and a shortage of finances. Environmental aims had no priority since production was the absolute, primary objective. Consequently, this regime of economic autarchy ended in an one-way street as far as industry was concerned, a situation which was accompanied by an unexampled destruction of the natural basic living conditions and direct, threatening health hazards to man and nature. The year 1990 saw the beginning of the transition from planned controlled economy to free market economy. The reorganization of the former large combines as corporations was not however merely a formal change, but internally also represented a transformation. The brown coal mining industry manifested its new intention and determination to be economically competitive and unsubsidized in future, to operate in such a way as to be compatible with the environment and to exploit reserves carefully, as well as to render its activities socially compatible. (orig.)

  6. Monitoring dispatch information system of trucks and shovels in an open pit based on GIS/GPS/GPRS

    Institute of Scientific and Technical Information of China (English)

    GU Qing-hua; LU Cai-wu; LI Fa-ben; WAN Chang-yong

    2008-01-01

    Using GIS, GPS and GPRS, an intelligent monitoring and dispatch system of trucks and shovels in an open pit has been designed and developed. The system can monitor and dispatch open-pit trucks and shovels and play back their historical paths. An intelligent data algorithm is proposed in a practical application. The algorithm can count the times of deliveries of trucks and loadings of shovels. Experiments on real scenes show that the performance of this system is stable and can satisfy production standards in open pits.

  7. Mining pressure monitoring and analysis in fully mechanized backfilling coal mining face-A case study in Zhai Zhen Coal Mine

    Institute of Scientific and Technical Information of China (English)

    ZHANG Qiang; ZHANG Ji-xiong; KANG Tao; SUN Qiang; LI Wei-kang

    2015-01-01

    Fully mechanized solid backfill mining (FMSBM) technology adopts dense backfill body to support the roof. Based on the distinguishing characteristics and mine pressure control principle in this technology, the basic principles and methods for mining pressure monitoring were analyzed and established. And the characteristics of overburden strata movement were analyzed by monitoring the support resistance of hydraulic support, the dynamic subsidence of immediate roof, the stress of backfill body, the front abutment pressure, and the mass ratio of cut coal to backfilled materials. On-site strata behavior measurements of 7403W solid backfilling working face in Zhai Zhen Coal Mine show that the backfill body can effectively support the overburden load, obviously control the overburden strata movement, and weaken the strata behaviors distinctly. Specific performances are as follows. The support resistance decreases obviously; the dynamic subsidence of immediate roof keeps consistent to the variation of backfill body stress, and tends to be stable after the face retreating to 120-150 m away from the cut. The peak value of front abutment pressure arises at 5-12 m before the operating face, and mass ratio is greater than the designed value of 1.15, which effectively ensures the control of strata movement. The research results are bases for intensively studying basic theories of solid backfill mining strata behaviors and its control, and provide theoretical guidance for engineering design in FMSBM.

  8. Mining in Austria in 1992

    International Nuclear Information System (INIS)

    The mineral production of Austria, in 1992 - as far as under the supervision of the Austrian Mine Inspectorate, run up to about 50 million t of solid minerals, 1.2 million t of oil and 1.4 billion m3 of natural gas. 88% of the solid minerals comprised industrial minerals, 4% metals, 4% salt and 4% coal. The solid minerals were produced by 352 open pits and 15 underground mines. 3 of the operations worked both on surface and underground and one mine is a well field operation. In total around 8000 people were employed in the field of mining and mineral processing. The minerals produced represent a value of about 15 billion Austrian Schillings (about 1.25 billion US $), the major part being the industrial minerals sector with a share of 7 billion Austrian Schillings and oil and gas with around 4 billion Austrian Schillings. The industrial minerals sector does not play only in Austrian an important role, but contributes also remarkably to the world production. This comprises mainly magnesite, talc, kaolin and graphite where Austria produces more than 1% of the world production. Summarizing, it can be said that the future of the Austrian mining sector is quite prosperous, perhaps better than in some other traditional mining countries in Europe, where the change from the coal and base metals sector towards the industrial sector has not come so far. (orig.)

  9. MINE DEGASIFICATION AS BASIC SAFETY ELEMENT IN THE UNDERGROUND PARTS OF GASSY COAL MINES IN THE OSTRAVA – KARVINÁ COALFIELD

    Directory of Open Access Journals (Sweden)

    Vlastimil Hudeček

    2011-12-01

    Full Text Available In the article, degasification methods to drain the gas from the underground parts of coal mines in the Czech Republic are described. The authors are concerned with the possibilities of and new trends in ensuring safety by means of drilling operations. Examples of applications of degasification in mine plants in the Czech Republic, above all in a hard coal deposit in the Ostrava-Karviná Coalfield in the Upper Silesian Basin are presented.

  10. Prevalence Characteristics of Coal Workers’ Pneumoconiosis (CWP) in a State-Owned Mine in Eastern China

    OpenAIRE

    Lei Han; Ruhui Han; Xiaoming Ji; Ting Wang; Jingjin Yang; Jiali Yuan; Qiuyun Wu; Baoli Zhu; Hengdong Zhang; Bangmei Ding; Chunhui Ni

    2015-01-01

    Coal Workers’ Pneumoconiosis (CWP) is the primary occupational disease in China. However, information about the definite prevalence of CWP is only partially available. The aims of our study were to assess the prevalence characteristics of CWP in a state-owned coal mine, evaluate the effects of control measures and develop further preventive strategies for CWP. The total study population included 495 cases who were diagnosed with CWP from the construction of this coal mine to the end of Octobe...

  11. First aid to miners suffering from overheating in deep coal mines

    Energy Technology Data Exchange (ETDEWEB)

    Makartsev, V.I.; Tsepurdei, A.A.; Zabolotnii, V.N.; Mozhaev, G.A.; Gridin, V.S. (Vsesoyuznyi Nauchno-Issledovatel' skii Institut Gornospasatel' nogo Dela (Russian Federation))

    1993-03-01

    Describes the symptoms of hyperthermia and approaching thermal shock in coal miners working in deep coal mines. First aid is given to miners suffering from hyperthermia and thermal shock. It is pointed out that prolonged exposure to elevated temperatures at workplaces can result in thermal exhaustion with a deficit of body fluids and minerals. Thermal exhaustion is characterized by general weakness, headaches, insomnia, sleepiness, choleric mood, emotional upset, tremulous pulse and labored breathing. Preventive measures against overheating in deep coal mines are listed.

  12. The study of coal mine equipment's comprehensive evaluation index system and evaluation method

    Institute of Scientific and Technical Information of China (English)

    WANG Xin-hua; SHI Guo-qing

    2004-01-01

    Equipment management is one of the important parts of business administration of coal. Most of coal mines take no account of their equipment management, and have no comprehensive and effective evaluation index system. Based on the analysis of the equipment evaluation measures of reform and the applications, the paper built up a comprehensive and effective evaluation index system of coal mine equipment, and improved the evaluation method with the use of fuzzy theory, analytic hierarchy process and entropy method.

  13. The application of the radon-measuring method in the coal mine geology

    International Nuclear Information System (INIS)

    Radon-Measuring method is a new type technique of nuclear geophysical. By using this technique, hidden fracture, hidden depressed column, empty hollow of old coal pit and growth region of contain water fracture or crevice in bottom of coal seam can be detected in coal mine. The test results have proved that this technique is quick, flexible and economical

  14. Technique of complex slime water treatment of coal-mining branch

    OpenAIRE

    Solodov, G. А.; Zhbyr, Е. V.; Papin, А. V.; Nevedrov, А. V.

    2007-01-01

    The possibility of complex slime water treatment at coal-mining and coal-treating plants producing marketable products: power-generating concentrate, coal-water fuel, magnetic fraction, industrial water is shown. A basic process flowsheet of slime water treatment presenting a united technological complex is suggested.

  15. Comprehensive Technical Support for High-Quality Anthracite Production: A Case Study in the Xinqiao Coal Mine, Yongxia Mining Area, China

    OpenAIRE

    , Wei Zhang; Dongsheng Zhang; Hongzhi Wang; Jixin Cheng

    2015-01-01

    The effective production of high-quality anthracite has attracted increasing global attention. Based on the coal occurrence in Yongxia Mining Area and mining conditions of a coalface in Xinqiao Coal Mine, we proposed a systematic study on the technical support for the production of high-quality anthracite. Six key steps were explored, including coal falling at the coalface, transport, underground bunker storage, main shaft hoisting, coal preparation on the ground, and railway wagon loading. T...

  16. An effect of smoking on pulmonary function of underground coal miners in zenica coal mines

    Directory of Open Access Journals (Sweden)

    S. Sivić

    2006-02-01

    Full Text Available The objectives of this prospective descriptive controlled study are to determine a prevalence of smokers in coal mines in Zenica and demonstrate how smoking and respirable coal dust affect pulmonary functions. A group of 75 randomly chosen coal miners and 96 randomly chosen metal workers participated in the research. Each examinee had a physical examination, lungs x-ray and spirometric analysis of lungs functions. Forced expiratoryvolume in a second (FEV1 including a ratio of forced expiratory volume per second and a forced vital capacity (FEV1/FVC have been measured. For evaluation purposes of respiratory tract obstruction we have used recommendations of American Thoracal Society.It has been determined that statistically there are considerably more smokers among coal workers than among workers in metal industry. The prevalence among coal workers is 49 (65,3%, and among metal workers it amounts to 46 (47,9%. Impairment of pulmonary functions has been found mostly in the group of workers who were exposedto respirable coal dust and smoking. In this group there were 8 (16.3% workers with a moderate obstruction and 1 (2,0% with a moderately severe obstruction whereas a normal result was not found. In the group who were exposed only to respirable coal dust there was 1 (3,8% worker with a moderate obstruction and 1 (3,8% worker with a moderately severe obstruction and none of them showed normal results. In the group of workers who were exposed only to smoking there were 10 (21,7% with normal findings.Theminerswhowereexposedneithertocoal dust nor smoking had 100% normal results.

  17. Selective bibliography of surface coal mining and reclamation literature. Volume 1. Eastern coal province. [More than 1300 references

    Energy Technology Data Exchange (ETDEWEB)

    Weiss, N. E.; Sobek, A. A.; Streib, D. L.

    1977-11-01

    This bibliography has been compiled for use by researchers, students, and other groups who need a reference source of published literature related to surface coal mining and reclamation in the Eastern Coal Province. This bibliography contains more than 1300 references including government reports, journal articles, symposium proceedings, industrial reports, workshop proceedings, theses, and bibliographices. A simple format was used to categorize citations.

  18. Distribution pattern and limiting factors of vegetation in coal waste pile of Xinzhuangzi coal mine in Huainan

    Institute of Scientific and Technical Information of China (English)

    CHU Zhao-xia; WANG Shun-chang; WANG Xing-ming

    2012-01-01

    In China,coal mine spoils have traditionally been dumped in cone-shaped heaps that have the potential to pollute air,soil and water environments.The coal waste pile occupies lots of arable land and endangers the ecological system in the coal mine district.Vegetation restoration is an efficient approach for controlling the environment pollution of coal waste pile,and is also a topic of current interest in restoration ecology and degradation system ecology.This study focused on the distribution pattern and limiting factors of vegetation in coal waste pile of Xinzhuangzi Coal Mine in Huainan.The results show that two stable plant communities (Synodon dactylon+Erigeron bonariensis.L+Setaria viridis community and Humulus scanden+Erigeron bonariensis.L community) exist at the bottom of the pile.Synodon dactylon and Erigeron bonariensis.L have much higher values of summed dominance ratio,which denote that these two species can be used for restoration of coal waste piles.The high levels of pH (8.77) and salinity,low levels of total P and total K in coal mine spoil can be the limiting factors for the residence and growth of vegetation.

  19. Proceedings, 95th regular meeting: The Rocky Mountain Coal Mining Institute

    International Nuclear Information System (INIS)

    In addition to the nine convention papers published in these proceedings, information is given on the membership and organization of the Rocky Mountain Coal Mining Institute. The papers are concerned with the economics and management of coal companies, occupational safety of their employees, public anxiety of the environmental impacts of surface mining, and contracting for mining equipment maintenance. Papers have been processed separately for inclusion on the data base

  20. The Imposition Environmental Cost-Loading Of Companies Investing In Coal Mining

    Directory of Open Access Journals (Sweden)

    Tomi Risman

    2015-08-01

    Full Text Available The instrument of environment is an effort to prevent environmental problems caused by mining activities both in forms and its nature. The aims of the study are to analyze and understanding the essence of environment cost-loading in order to restore the environment from coal mining activities both when mining taken place and post-mining. The type of research used is a normative-legal research. This research was conducted in the province of South Kalimantan with the consideration that the South Kalimantan is one of the largest coal-producing Provinces in Indonesia. In addition the environment cost-loading for investor in coal mining have the same properties in all coal mining sites in Indonesia. The results of the research indicated that the imposition and environment-cost in investment activity in the field of coal mining can be seen from the two approaches i.e the economic and legal approach. Economic approach is an approach that emphasizes the economic benefits gained by the owner of activities when they comply with the environmental requirements stipulated by laws and environmental regulations. Realizing the importance of environmental cost-loading for the company that manages the coal mining especially for the utilization of prevention of pollution caused by coal mining activity it is necessary to develop an institutional guarantee of recovery from the effects of pollution by establishing fund insurance for environmental restoration as a result of pollution. Thus in order to optimize the implementation of guarantee fund for environmental restoration are specifically utilized for post-mining reclamation then granting the status of Clean and Clear C amp C for coal mining investor must be presupposing the proof of guarantee fund has been placed for environmental restoration post-mining.