WorldWideScience

Sample records for open-pit coal mines

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

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

    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...

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

    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.

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

    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.

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

    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.

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

    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)

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

    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

  8. Peak particle velocity for rockbursts in underground coal mines and for shot-hole explosions in open-pit mines

    Holub, Karel; Rušajová, Jana

    2011-01-01

    Roč. 46, č. 1 (2011), s. 104-114. ISSN 1217-8977 Institutional research plan: CEZ:AV0Z30860518 Keywords : hole- shot explosion * open-pit mine * peak particle velocity Subject RIV: DC - Siesmology, Volcanology, Earth Structure Impact factor: 0.346, year: 2011 http://www.akademiai.com/content/k3u1334gw21u4x27/

  9. Dynamics of the ecological-functional parameters of replantozems on dumps of open-pit coal mines in Central Siberia

    Trefilova, O. V.; Grodnitskaya, I. D.; Efimov, D. Yu.

    2013-12-01

    The dynamics have been studied of the ecological-functional parameters (EFP) of replantozems formed on the dumps of the Borodinskiy open-pit coal mine in the Kansk-Achinsk Coal Basin (55°52' N, 94°54' E) that were not involved into agricultural use during the first 30 years. The work was based on the integrated analysis of the agrochemical properties and the EFP, which characterized the state of the plant cover, the microbial cenoses, and the biochemical activity of the replantozems representing a chronological series (5, 20, and 30 years). Multicomponent plant communities were formed on the surface of the replantozems over the 30-year period. The filled horizon of the replantozems was slowly involved into the metabolic processes. The thickness of the biologically active layer did not exceed 10 cm. The microbial cenosis's functional activity was relatively stabilized, and the values of the microbial biomass and basal respiration approached the background ones only in the upper (0-5 cm) layer. The biochemical activity of the microorganisms agreed with the changes in the properties of the upper (0-10 cm) layer of the replantozems: the contents of the total nitrogen and humus increased, as well as the degree of the humic acids "maturity" and the concentration of the mobile phosphorus, while the alkalinity decreased.

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

    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...

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

    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

  12. Identification of a Hidden Volcano in an Open-pit Coal Mine by Gravity Survey, NW Bohemia

    Mrlina, Jan

    Houten: EAGE, 2014, Tu PA2 03/1-Tu PA2 03/5. ISBN 978-94-6282-027-2. [Near Surface Geoscience 2014 - 20th European Meeting of Environmental and Engineering Geophysics. Athens (GR), 14.09.2014-18.09.2014] Institutional support: RVO:67985530 Keywords : hidden volcano * coal mine * gravity survey Subject RIV: DC - Siesmology, Volcanology, Earth Structure

  13. Natural radioactivity in lignite samples from open pit mines “Kolubara”, Serbia – risk assessment

    Coal as fossil fuel mainly contains naturally occurring radionuclides from the uranium and thorium series and 40K. Use of coal, primarily in industry, as a result has dispersion of radioactive material from coal in and through air and water. The aim of this study was to determine the activity concentrations of natural radionuclides in coal samples from open pit mines “Kolubara” and to evaluate its effect on population health. The results showed that all measured and calculated values were below the limits recommended in international legislation. - Highlights: • Activity concentrations of natural radionuclides in coal samples were determined. • Effect on population health due to the activity of these radionuclides was estimated. • All samples were collected at different locations of the open pit mines “Kolubara”. • All measured and calculated values were below the recommended limits. • There is no enhanced radiation hazard for population nearby open pit mines

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

    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

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

    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. Haulage Truck Operator. Open Pit Mining Job Training Series.

    British Columbia Dept. of Education, Victoria.

    This training outline for haulage truck operators, one in a series of eight outlines, is designed primarily for company training foremen or supervisors and for trainers to use as an industry-wide guideline for heavy equipment operator training in open pit mining in British Columbia. Intended as a guide for preparation of lesson plans both for…

  17. Rotary Drill Operator. Open Pit Mining Job Training Series.

    Savilow, Bill

    This training outline for rotary drill operators, one in a series of eight outlines, is designed primarily for company training foremen or supervisors and for trainers to use as an industry-wide guideline for heavy equipment operator training in open pit mining in British Columbia. Intended as a guide for preparation of lesson plans both for…

  18. Front End Loader Operator. Open Pit Mining Job Training Series.

    Savilow, Bill

    This training outline for front end loader operators, one in a series of eight outlines, is designed primarily for company training foremen or supervisors and for trainers to use as an industry-wide guideline for heavy equipment operator training in open pit mining in British Columbia. Intended as a guide for preparation of lesson plans both for…

  19. Grader Operator. Open Pit Mining Job Training Series.

    Savilow, Bill

    This training outline for grader operators, one in a series of eight outlines, is designed primarily for company training foremen or supervisors and for trainers to use as an industry-wide guideline for heavy equipment operator training in open pit mining in British Columbia. Intended as a guide for preparation of lesson plans both for classroom…

  20. Rubber Tire Dozer Operator. Open Pit Mining Job Training Series.

    British Columbia Dept. of Education, Victoria.

    This training outline for rubber tire dozer operators, one in a series of eight outlines, is designed primarily for company training foremen or supervisors and for trainers to use as an industry-wide guideline for heavy equipment operator training in open pit mining in British Columbia. Intended as a guide for preparation of lesson plans both for…

  1. Track Dozer Operator. Open Pit Mining Job Training Series.

    British Columbia Dept. of Education, Victoria.

    This training outline for track dozer operators, one in a series of eight outlines, is designed primarily for company training foremen or supervisors and for trainers to use as an industry-wide guideline for heavy equipment operator training in open pit mining in British Columbia. Intended as a guide for preparation of lesson plans both for…

  2. Shovel Operator. Open Pit Mining Job Training Series.

    Hartley, Larry

    This training outline for shovel operators, one in a series of eight outlines, is designed primarily for company training foremen or supervisors and for trainers to use as an industry-wide guideline for heavy equipment operator training in open pit mining in British Columbia. Intended as a guide for preparation of lesson plans both for classroom…

  3. Heavy Duty Tireman. Open Pit Mining Job Training Series.

    McColman, Don

    This training outline for heavy duty tiremen, one in a series of eight outlines, is designed primarily for company training foremen or supervisors and for trainers to use as an industry-wide guideline for heavy equipment operator training in open pit mining in British Columbia. Intended as a guide for preparation of lesson plans both for classroom…

  4. Cut winnings methods of an open-pit mine development

    Ivana Cehlárová; Michal Cehlár

    2007-01-01

    Surface mining is an extremely significant process of acquisition of a substantial amount of minerals serving the needs of human society. The open-pit mining process is characterized by horizontal removal of a huge amount of blasted rock. The deposit is often mined in several horizontal sections. The deposits may be mined via so-called shelf quarries, which are quarries created in the hill slope or via so-called pit quarries where the quarry is established in the terrain lacking the camber an...

  5. Superficial drainage studies in open-pit mines

    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.)

  6. Cut winnings methods of an open-pit mine development

    Surface mining is an extremely significant process of acquisition of a substantial amount of minerals serving the needs of human society. The open-pit mining process is characterized by horizontal removal of a huge amount of blasted rock. The deposit is often mined in several horizontal sections. The deposits may be mined via so-called shelf quarries, which are quarries created in the hill slope or via so-called pit quarries where the quarry is established in the terrain lacking the camber and the quarry is 'deepened' in the depth direction by gradual mining. A combined way is also possible, when after the initial mining in the shelf quarry, mining continues to altitudes under the surrounding level. (authors)

  7. Radon and aerosol release from open-pit uranium mining

    The quantity of 222Rn (hereafter called radon) released per unit of uranium produced from open pit mining has been determined. A secondary objective was to determine the nature and quantity of airborne particles resulting from mine operations. To accomplish these objectives, a comprehensive study of the release rates of radon and aerosol material to the atmosphere was made over a one-year period from April 1979 to May 1980 at the Morton Ranch Mine which was operated by United Nuclear Corporation (UNC) in partnership with Tennessee Valley Authority (TVA). The mine is now operated for TVA by Silver King Mines. Morton Ranch Mine was one of five open pit uranium mines studied in central Wyoming. Corroborative measurements were made of radon flux and 226Ra (hereafter called radium) concentrations of various surfaces at three of the other mines in October 1980 and again at these three mines plus a fourth in April of 1981. Three of these mines are located in the Powder River Basin, about 80 kilometers east by northeast of Casper. One is located in the Shirley Basin, about 60 km south of Casper, and the remaining one is located in the Gas Hills, approximately 100 km west of Casper. The one-year intensive study included simultaneous measurement of several parameters: continuous measurement of atmospheric radon concentration near the ground at three locations, monthly 24-hour radon flux measurements from various surfaces, radium analyses of soil samples collected under each of the flux monitoring devices, monthly integrations of aerosols on dichotomous aerosol samplers, analysis of aerosol samplers for total dust loading, aerosol elemental and radiochemical composition, aerosol elemental composition by particle size, wind speed, wind direction, temperature, barometric pressure, and rainfall

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

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

    2016-01-01

    that need to be met by the wireless network. This article introduces fundamental concepts behind open-pit mining and discusses why this ever changing environment coupled with strict industrial reliability requirements pose unique challenges to traditional broadband network planning and optimization......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...... techniques. On the other hand, unlike unpredictable disaster scenarios, mining is a carefully planned activity. Taking advantage of this predictability element, we propose a framework that integrates mine and network planning so that continuous and automated adaptation of the network becomes possible...

  9. Preliminary study of realizability of Karazhyra open pit coal fines briquetting

    Main properties of brown coals in Karazhyra open pit upper and lower packs are determined. Characteristics of these coals briquette-ability are evaluated. A conceptual possibility to obtain high-quality briquettes from open pit coal fines is shown. (author)

  10. Some questions on small uranium open-pit mines

    The experiences of the existing uranium open pits are summarized and the questions in design, erection and production are analyzed. It is important helpful to develop and to design such economical and reasonable small uranium open pits

  11. Predictive Index for slope instabilities in open pit mining

    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.

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

    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.

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

    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.

  14. Cost analysis of open-pit mining by heap leaching

    The costs of producing uranium by an open-pit mining using a heap leaching beneficiation operation are analyzed. The selection of a heap leaching operation is dictated largely by the small size of the orebody. The uranium minerals present respond readily to the lixiviant employed permitting some 75 to 80 per cent of the 1200 to 1500 ppm of U3O8 present in the heap to be recovered. Manpower and transportation account for a large proportion of the operating costs. The capital investment employed is equivalent to $ 5 000 000 and the production cost is equivalent to a value in the range $ 10 to $ 15 per pound on U3O8. Of interest is the 11.5 per cent of the overhead costs spent on security

  15. Geodetic determining of stockpile volume of mineral excavated in open pit mine

    Labant, Slavomír; Staňková, Hana; Weiss, Roland

    2013-01-01

    In the contemporary geodetic practice it is practically a must to use modern geodetic apparatuses and a variety of the CAD (Computer Aided Design) software for processing and visualising spatial data. The present paper deals with geodetic surveying of Kecerovce open pit mine to determine, for the purpose of mine reopening and commencing with mining of andesite, the volume of non-extracted volumes of andesite. The open pit mine is situated on the foot of Slanské vrchy mountain range. Determini...

  16. 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

    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.

  17. 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

    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 .

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

    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.

  19. Hydrodynamic model of the open-pit mine “Buvač” (Republic of Srpska

    Papić Petar

    2013-09-01

    Full Text Available Projecting of the dewatering system of the open-pit mine “Buvač” (Republic of Srpska, Bosnia and Herzegovina is based on the use of hydrodynamic model of groundwater regime. Creating the hydrodynamic model of the open-pit mine “Buvač“ was made in phases, which began by basic interpretation of collected data, along with schematization of the groundwater flow and flow conditions, and finally, forming and calibration of model. Hydrodynamic model was created as multilayer model with eight layers. Calibration of the hydrodynamic model is the starting point for making prognosis calculation in order to create the most optimal system of open-pit mine protection from groundwater. The results of model calibration indicated that the rivers Gomjenica and Bistrica, precipitation and inflow from karstified rocks are the primary sources of recharge of the limonite ore body “Buvač”.

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

    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.

  1. The application of GPS to the deformation monitoring of side slope in open-pit uranium mines

    GPS has the characters,such as higher accuracy,not influenced by weather and day time. According to actual circumstance of a open pit uranium mine in China. This paper introduces a system to monit the deformation of side sloping and its detail application in a open pit mine. (authors)

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

    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...

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

    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.

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

    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.

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

    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.

  6. Easy profit maximization method for open-pit mining

    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.

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

    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

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

    Asif Khan; Christian Niemann-Delius

    2014-01-01

    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 (P...

  9. Open pit mine planning and design. Vol 1. Fundamentals; Vol. 2. CSMine software package and orebodey case examples. 2nd.

    Hustrulid, W.; Kuchta, M. [University of Utah, Salt Lake City, UT (United States)

    2006-04-15

    This book is designed to be both a textbook and a reference book describing the principles involved in the planning and design of open pit mines. Volume 1 deals with the fundamental concepts involved in the planning and design of an open pit mine. The eight chapters cover mine planning, mining revenues and costs, orebody description, geometrical considerations, pit limits, and production planning, mineral resources and ore reserves, and responsible mining. There is an extensive coverage of environmental considerations and basic economic principles. A large number of examples have been included to illustrate the applications. A second volume is devoted to a mine design and software package, CSMine. CSMine is user-friendly mine planning and design software developed specifically to illustrate the practical application of the involved principles. It also comprises the CSMine tutorial, the CSMine user's manual and eight orebody case examples, including drillhole data sets for performing a complete open pit mine evaluation. 545 ills., 211 tabs.

  10. Analysis of open-pit mines using high-resolution topography from UAV

    Chen, Jianping; Li, Ke; Sofia, Giulia; Tarolli, Paolo

    2015-04-01

    Among the anthropogenic topographic signatures on the Earth, open-pit mines deserve a great importance, since they significantly affect the Earth's surface and its related processes (e.g. erosion, pollution). Their geomorphological analysis, therefore, represents a real challenge for the Earth science community. The purpose of this research is to characterize the open-pit mining features using a recently published landscape metric, the Slope Local Length of Auto-Correlation (SLLAC) (Sofia et al., 2014), and high-resolution DEMs (Digital Elevation Models) derived from drone surveyed topography. The research focuses on two main case studies of iron mines located in the Beijing district (P.R. China). The main topographic information (Digital Surface Models, DSMs) was derived using Unmanned Aerial Vehicle (UAV) and the Structure from Motion (SfM) photogrammetric technique. The results underline the effectiveness of the adopted methodologies and survey techniques in the characterization of the main geomorphic features of the mines. Thanks to the SLLAC, the terraced area given by multi-benched sideways-moving method for the iron extraction is automatically depicted, and using some SLLAC derived parameters, the related terraces extent is automatically estimated. The analysis of the correlation length orientation, furthermore, allows to identify the terraces orientation respect to the North, and to understand as well the shape of the open-pit area. This provides a basis for a large scale and low cost topographic survey for a sustainable environmental planning and, for example, for the mitigation of environmental anthropogenic impact due to mining. References Sofia G., Marinello F, Tarolli P. 2014. A new landscape metric for the identification of terraced sites: the Slope Local Length of Auto-Correlation (SLLAC). ISPRS Journal of Photogrammetry and Remote Sensing, doi:10.1016/j.isprsjprs.2014.06.018

  11. Combining Multiple Surveying Techniques to Accelerate Surveys of Open Pit Mines

    Faust, János; Schimmer, Christoph; Herkommer, Martin; Kutschera, Johannes

    2014-05-01

    Terrestrial Lidar Scanning (TLS) is well-accepted as the most precise tool for surveying open pit mines, collecting ultra-dense measurements drastically faster than traditional land surveying with a GNSS receiver. However, while a TLS can capture the most important parts of a mine in only a few surveys, the remaining occluded areas of the mine require several additional surveys, extending the survey time. To drastically reduce the time required for a TLS survey while still providing good quality data, we have adopted an approach that augments TLS data with UAV-based aerial triangulation. First, we identify a handful of positions from which the TLS can survey the vast majority of the mine, paying particular attention to the most important areas of the mine and the areas that an airborne scanner would have difficult accessing, such as the walls. We then survey the mine with a UAV-mounted camera and collect several ground control points (GCPs) in areas spread across the mine. During post-processing, we use aerial triangulation to derive a point cloud from the overlapping images captured by the UAV and matched the TLS and UAV data with the GCPs. Generally, the aerial-triangulation data is less dense and precise than the TLS data so we only used it to fill in areas we did not cover with the TLS. To minimize the impact of any loss of detail, we plan surveys so that the TLS covers the most important parts of the mine and so the UAV data is only needed for less important areas. The result is a georeferenced topographic map of the entire mine with high-quality data in the most important areas, all collected within hours rather than days. As proof of this concept, geo-konzept surveyed a mid-sized German open pit mine with a goal of spending only half a day surveying on-site. With an Optech ILRIS TLS and a geo-konzept Geo-Copter X-8000 UAS, we met this goal by surveying the entire 500-m×500-m mine in only 3 hours. Post-processing and georeferencing only required another 4

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

    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

  13. MINE - A Game for the Analysis of Regional Water Policies in Open-Pit Lignite Mining Areas

    Weigkricht, E.; Kaden, S.

    1985-01-01

    The game MINE has been developed for the analysis of regional water policies in open-pit lignite mining areas. It is implemented for a GDR test area. The purpose of the game is above all to teach decision makers and their staff in mining regions in order to get a better understanding of the complex interrelated socio-economic processes with respect to water management in such regions. The game is designed to be played by five groups of players representing municipal and industrial water suppl...

  14. Determination of box-cut area of the Collolar open pit of Afsin-Elbistan lignite mine (TEAS); Afsin-Elbistan linyit isletmesi (TEAS) Collolar acik isletmesi ilk kazi noktasinin belirlenmesi

    Dag, A.; Anil, M.

    1996-12-31

    In this study, the optimum box-cut area of the Collolar open pit of Afsin Elbistan Lignite Mine that would supply the lignite demand of the B-power station, which will have a future capacity of 4 x 340 MW, was determined by means of computer programming. 305 drill logs recovered at Collolar were evaluated and the coal body analysed using geostatistical modelling. In addition, the boundary of the optimum open pit mine that would supply the lignite demand for 30 years was determined. 5 refs., 5 figs., 4 tabs.

  15. Evaluation and monitoring an on-going landslide in volcanic sediments - a case study for an open pit mine, Turkey: Part 1

    Onur, A.H.; Konak, G.; Koca, Y.; Yenice, H.; Kose, H.; Karakus, D. [Dokuz Eylul University, Izmir (Turkey). Dept. of Mineral Engineering

    2004-09-01

    TKI (Turkish Coal Enterprises) has been operating an open pit lignite mine since late 1970s in a town called Can which is situated in the north-west of Turkey. There is a ceramic factory, which is one of the biggest in Europe as far as capacity is concerned, operating very close to the lignite open pit mine. In 1999, a catastrophic earthquake demolished not only the cities and towns located on the Northern Anatolian fault zone but also triggered a landslide on the ceramic factory site benches of the Can lignite open pit. The susceptibility of artificial slopes to failure during earthquakes is a well-known event. This paper summarises geological, geomorphological and hydrological surveys of the area and the work done to define the slip surface by means of inclinometer surveys. Geotechnical parameters collected from all local geological formations were used later in the slope stability analysis. Details of the studies undertaken since the beginning of the landslide are given in this paper.

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

    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.

  17. Formation of the composition and properties of dumps on the open-pit mines of Kuzbass

    Lesin, Y. V.; Luk'yanova, S. Y.; Tyuleneva, M. A.

    2015-09-01

    In 2012 the total volume of coal mining in the Kuzbass was about 200 million tons, including 116 million tons (60.3%) produced open way, Figure 1. In 2014, it was produced more than 203 million tons of coal. In addition, there is no reason to believe that in the near future volume of coal will decline. Accordingly, the volume of wastewater discharged by enterprises will increase. So, from 2006 to 2009 there was an increase of polluted water discharge coal mines from 217 to 245 million m3. Therefore, the problem of water pollution mines governmental waters and career is very important.

  18. Optimal synthesis of energy supply systems for remote open pit mines

    electricity and syngas storage and diesel and biomass bunkering. Within the paper the energy demands for a remote, open pit mining operation located in Northern Ontario are considered as a case study to illustrate the technique and investigations. As expected, for mines close to electricity, natural gas, and diesel distribution infrastructures, the optimal choice is to connect. When a constraint is applied specifying that connection is not possible, as would be for the case exemplified, the optimal choice includes some of the more exotic options for mine site energy supply. - Highlights: •Optimal mine site energy supply methodology is established. •Methodology permits innovative, lower cost, energy supply solutions to be identified. •The methodology allows for electricity and syngas storage and diesel and biomass bunkering. •A remote, open pit mining operation located in Northern Ontario is considered as a case study. •The optimal solution includes some of the more exotic options for mine site energy supply

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

    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...

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

    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

  1. 3D Modeling of Landslide in Open-pit Mining on Basis of Ground-based LIDAR Data

    Hu, H.; Fernandez-Steeger, T. M.; Azzam, R.; Arnhardt, C.

    2009-04-01

    Slope stability is not only an important problem which is related to production and safety in open-pit mining, but also very complex task. There are three main reasons which affect the slope stability as follows: geotechnical factors: Geological structure, lithologic characteristics, water, cohesion, friction, etc.; climate factors: Rainfall and temperature; and external factors: Open-pit mining process, explosion vibration, dynamic load, etc.. The 3rd reason, as a specially one in open-pit mining, not only causes some dynamic problems but also induces the fast geometry changing which must be considered in the following research using numerical simulation and stability analysis. Recently, LIDAR technology has been applied in many fields and places in the world wide. Ground-based LIDAR technology with high accuracy up to 3mm increasingly accommodates to monitoring landslides and detecting changing. LIDAR data collection and preprocessing research have been carried out by Department of Engineering Geology and Hydrogeology at RWTH Aachen University. LIDAR data, so-called a point-cloud of mass data in high density can be obtained in short time for the sensitive open-pit mining area by using ground-based LIDAR. To obtain a consistent surface model, it is necessary to set up multiple scans with the ground-based LIDAR. The framework of data preprocessing which can be implemented by Poly-Works is introduced as follows: gross error detection and elimination, integration of reference frame, model fusion of different scans (re-sampled in overlap region), data reduction without removing the useful information which is a challenge and research front in LIDAR data processing. After data preprocessing, 3D surface model can be directly generated in Poly-Works or generated in other software by building the triangular meshes. The 3D surface landslide model can be applied to further researches such as: real time landslide geometry monitoring due to the fast data collection and

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

    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.

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

    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.

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

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

    2016-01-01

    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 ...

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

    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.

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

    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...

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

    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.

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

    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

  9. 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

    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.

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

    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...

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

    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.

  12. The long-term effects of a token economy on safety performance in open-pit mining.

    Fox, D K; Hopkins, B. L.; Anger, W K

    1987-01-01

    A token economy that used trading stamps as tokens was instituted at two dangerous open-pit mines. Employees earned stamps for working without lost-time injuries, for being in work groups in which all other workers had no lost-time injuries, for not being involved in equipment-damaging accidents, for making adopted safety suggestions, and for unusual behavior which prevented an injury or accident. They lost stamp awards if they or other workers in their group were injured, caused equipment da...

  13. Mitigation of adverse effects at the Lezama-Leguizamon abandoned open-pit mine (Bilbao, northern Spain)

    Saiz de Omeñaca, J.; Ereño, I.; Atxabal, K.; Azurmendi, I.

    1993-09-01

    Solid fills arranged in 1-m-thick layers were prepared with stone blocks and pebbles of a drainage bed every 8 m. Runoff gathering in a well and the use of silts and mud lands for bordering and sealing the limestones are the main techniques employed for minimizing unfavorable effects at the Lezama-Leguizamon abandoned open-pit mine. Since there were waste disposal problems in the area, the rate of disposal has made the activity profitable. No significant faults have been detected by control studies, and the objectives are being achieved without problems.

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

    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).

  15. The planning and operation of open-pit and strip mines: proceedings of an international conference held at the University of Pretoria, 9-13 April 1984

    This book records the proceedings of the second international conference on the theme of planning and operation of open-pit and strip mines. The conference was held in Pretoria during April 1984. The major portion of South African iron ore and copper is mined in open-pit mines. The rapid expansion of the open-pit and strip mining industry has led to the thriving industry of today. Notable areas of growth have been the introduction of capital-intensive machinery such as walking drag-lines, large capacity shovels, in-pit crushers, extensive use of conveyor belts, large haul tracks and ore-dressing plants. Among other areas where corresponding progress has been made are blasting techniques, maintenance planning, computer applications, and large-scale stock-piling of bulk materials. The conference touched on all these subjects under four main headings: mine planning, mining operations, equipment selection and maintenance, and new developments. One paper looks at open-pit production control at Rossing Uranium Limited

  16. MINE-NEC - A Game for the Analysis of Regional Water Policies in Open-Pit Lignite Mining Areas: An Improved Implementation for the NEC PC-8201A

    Kaden, S.; Varis, O.

    1986-01-01

    The game MINE was developed for the analysis of regional water policies in open-pit lignite mining areas. It is implemented for a GDR test area. The purpose of the game is above all to teach decision makers and their staff in mining regions in order to get a better understanding of the complex interrelated socio-economic processes with respect t o water management in such regions. The game is designed to be played by five groups of players representing municipal and industrial water supply, a...

  17. Radon Emission from Coal Mines of Kuzbass Region

    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.

  18. 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

    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

  19. Development of generalized cutoff grade optimization algorithm for open pit mining operations

    The determination of optimum cutoff grade is influenced by the economic parameters (price of metal, mining and processing costs, etc.),The capacities of stages (mine, mill, and refinery) in the mining operation, and the grade distribution of the deposit. The cutoff grade changes with the influence of these parameters, sometimes widely, during the life of a mining operation. The theory of optimum cutoff grades is complex. However, this problem can be solved by the availability of algorithms, which could be implemented by the computer programs. This paper presents a cutoff grade optimization algorithm, which maximizes the Net Present Value (NPV) of the mining operation subject to mining, milling and refining constraints, the benefits of the methodology developed are demonstrated in a case study. (author)

  20. Investigation of aerial dispersion of radioactive dust from an open-pit uranium mine by passive vinyl collectors

    Pettersson, H.B.; Koperski, J. (Lund Univ. Teaching Hospital (Sweden))

    1991-05-01

    Detailed investigations of the aerial dispersion of radioactive dust from the biggest open-pit U mining and milling operation in Australia were carried out. Spatial distributions of the long-lived radionuclides of {sup 238}U series and their origin, i.e., mining and milling operations vs. natural background radiation, have been studied. Horizontal flux, dry deposition, and ground resuspension of the radionuclides were investigated along a 50-km transect in the direction of the prevailing monsoonal winds in the region. The study was performed by means of unconventional 'sticky vinyl' passive dust collectors, occasionally supported by high-volume air filter samplers. The data from the flux measurements show an inverse square to inverse cubic dependence, and the dry deposition exhibits an inverse square dependence, of radionuclide load vs. distance. The pit has been the predominant contributor of long-lived U series radionuclides to the environment within the radius of several kilometers from the operations. An aerial dispersion computer code (LUCIFER), based on a Gaussian plume model, was developed for the project. Experimental data were used as the code input data. Good agreement between the measured data and the normalized computed results was obtained.

  1. Investigation of aerial dispersion of radioactive dust from an open-pit uranium mine by passive vinyl collectors

    Detailed investigations of the aerial dispersion of radioactive dust from the biggest open-pit U mining and milling operation in Australia were carried out. Spatial distributions of the long-lived radionuclides of 238U series and their origin, i.e., mining and milling operations vs. natural background radiation, have been studied. Horizontal flux, dry deposition, and ground resuspension of the radionuclides were investigated along a 50-km transect in the direction of the prevailing monsoonal winds in the region. The study was performed by means of unconventional 'sticky vinyl' passive dust collectors, occasionally supported by high-volume air filter samplers. The data from the flux measurements show an inverse square to inverse cubic dependence, and the dry deposition exhibits an inverse square dependence, of radionuclide load vs. distance. The pit has been the predominant contributor of long-lived U series radionuclides to the environment within the radius of several kilometers from the operations. An aerial dispersion computer code (LUCIFER), based on a Gaussian plume model, was developed for the project. Experimental data were used as the code input data. Good agreement between the measured data and the normalized computed results was obtained

  2. Usage of emulsion explosives on surface open pit mine “Zelenikovec” - Skopje

    Dambov, Risto; Bosevski, Trajce

    2013-01-01

    This paper describes the advantages of using emulsion explosives on the surface mine ”Zelenikovec”. A comparison has been made with the other types of explosives regarding the cost of drilling, blasting, environmental protection and the safety while using them. In the estimates, the criteria for using this type of emulsion explosives on the surface mine “Zelenikovec” have been met.

  3. 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

    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.

  4. In situ characterization at limestone open pit mine using prompt gamma neutron activation

    Using prompt gamma neutron activation (PGNAA) in situ characterization of blast holes in Atocongo and Pucara open cut mines from Cementos Lima S.A. has been performed. This method collects information about the ore surrounding the bore hole and gives a real time and representative results for a geophysical model of the mine. The PGNAA system gives an in situ estimation of SiO2, Al2O3, Fe2O3, CaO, and SO3. The field trials have been proved that the system could be used to characterize the limestone open cut mines. (orig.)

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

    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

  6. Determination of the radioactive aerosols transport coefficients generated in open pit uranium mining areas

    The classical atmospheric transport model is applied to uranium mining operations. Among the transport parameters there is one concerned with radioactive decay, but it does not include the radioactive decay series which is the specific case for uranium. Therefore, an extension of the transport theory is developed and tested, giving results greater than the ones obtained with the classical model, as expected. (author)

  7. Efficient using of automobile transport for the deep open-pit mines

    Dastan MAHAMBETOV

    2013-01-01

    Full Text Available In the paper the method is proposed of substantiation of the major parameters for zones of effective use of automobile transport of different load-carrying capacity by open cast development of the deep deposits. An efficient ratio is determined between the mining and transport equipment by zone-to -zone use.

  8. Analytical data for waters of the Harvard Open Pit, Jamestown Mine, Tuolumne County, California, March 1998-September 1999

    Ashley, R.P.; Savage, K.S.

    2001-01-01

    The Jamestown mine is located in the Jamestown mining district in western Tuolumne County, California (see Fig. 1). This district is one of many located on or near the Melones fault zone, a major regional suture in the Sierra Nevada foothills. The districts along the Melones fault comprise the Mother Lode gold belt (Clark, 1970). The Harvard pit is the largest of several open pits mined at the Jamestown site by Sonora Mining Corporation between 1986 and 1994 (Fig. 2; Algood, 1990). It is at the site of an historical mine named the Harvard that produced about 100,000 troy ounces of gold, mainly between 1906 and 1916 (Julihn and Horton, 1940). Sonora Mining mined and processed about 17,000,000 short tons of ore, with an overall stripping ratio of about 4.5:1, yielding about 660,000 troy ounces of gold (Nelson and Leicht, 1994). Most of this material came from the Harvard pit, which attained dimensions of about 2700 ft (830 m) in length, 1500 ft (460 m) in width, and 600 ft (185 m) in depth. The bottom of the pit is at an elevation of 870 ft (265 m). Since mining operations ceased in mid-1994, the open pit has been filling with water. As of November, 2000, lake level had reached an elevation of about 1170 ft (357 m). Water quality monitoring data gathered after mine closure showed rising levels of arsenic, sulfate, and other components in the lake, with particularly notable increases accompanying a period of rapid filling in 1995 (County of Tuolumne, 1998). The largest potential source for arsenic in the vicinity of the Harvard pit is arsenian pyrite, the most abundant sulfide mineral related to gold mineralization. A previous study of weathering of arsenian pyrite in similarly mineralized rocks at the Clio mine, in the nearby Jacksonville mining district, showed that arsenic released by weathering of arsenian pyrite is effectively attenuated by adsorption on goethite or coprecipitation with jarosite, depending upon the buffering capacity of the pyrite-bearing rock

  9. 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

    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。

  10. HYBRID REASONING FOR MULTI-ROBOT DRILL PLANNING IN OPEN-PIT MINES

    Masoumeh Mansouri

    2016-02-01

    Full Text Available Fleet automation often involves solving several strongly correlated sub-problems, including task allocation, motion planning, and coordination. Solutions need to account for very specific, domaindependent constraints. In addition, several aspects of the overall fleet management problem become known only online. We propose a method for solving the fleet-management problem grounded on a heuristically-guided search in the space of mutually feasible solutions to sub-problems. We focus on a mining application which requires online contingency handling and accommodating many domainspecific constraints. As contingencies occur, efficient reasoning is performed to adjust the plan online for the entire fleet.

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

    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

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

    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.

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

    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.

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

    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.

  15. 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

    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

  16. 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

    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.

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

    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

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

    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

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

    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.

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

    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.

  1. Implications of mining practices in an open-pit gold mine for monitoring of a comprehensive test-ban treaty

    This report summarizes the results of an experiment at the Gold Quarry pit, operated by the Newmont Gold Company at Carlin, NV The purpose of the experiment was to obtain local and regional seismic data, together with ''ground truth'', from conventional surface blasting activity and to use these data to help determine the effectiveness with which conventional mining blasts can be discriminated from underground nuclear explosions

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

    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.

  3. 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)

    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).

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

    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.

  5. Evaluation of ecological consequences of coal mine closure in Kuzbass coal region

    Kemerovo region (otherwise called Kuzbass) is the most industrially developed and urbanized region of Siberia, Russia. The main industrial branch of Kuzbass is coal output. Open pits and underground mines of Kuzbass produce about 40% of total amount of coal in Russia and more than 70% of coking coal. In the current process of the coal industry's restructuring, the closing of many unprofitable coal enterprises is associated with radical changes in their influence on the environment. The task to provide a probable forecast of ecological consequence of mine closure is both practically significant and complicated. In order to find some scientific approach to solve named problem the authors made in the paper the first attempts to analyze of accessible closed mines data in Kuzbass, to classify coal mines (working and closed) with respect to there negative influence on soil, water and atmosphere and to obtain some numerical estimates of possible bounds of this influence. 7 refs

  6. Coal Mines Security System

    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...

  7. Coal mining project for Sumatra

    1983-10-01

    A contract to the value of some DM 320 million (135 million US dollars) has been awarded to the 'Bukit Asam Consortium', consisting of O and K Orenstein and Koppel AG, PHB Weserhuette AG (PWH) and Marubeni Corporation, by the Indonesian Mining Company P.T. (Persero), Tambang Batubara Bukit Asam. The contract involves the manufacture, delivery, set-up and commissioning of open-pit mining equipment for the Air Laya Lignite mine, located in southern Sumatra.

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

    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.

  9. Study on Environment Characteristics for Mining Management at East Pit 3 West Banko Coal Mine

    Neny Rochyani; Eddy Ibrahim; Faizal, M.; Ngudiantoro Ngudiantoro

    2014-01-01

    The management on mining environment is closely related to the environmental characteristics and the condition of mining itself.  In East PIT 3 West Banko Coal Mine Tanjung Enim mine drainage system has been developed which refers to the open pit method employed by the company. The observation and analysis showed that the sludge settling ponds have been constructed as well as adequate catchment area. To discharge water into the channel at 0.3016 m 3 / sec can still be accommodated due to the ...

  10. A case study of a large open pit uranium AML [Abandoned Mine Land] Project Gas Hills, Wyoming

    The Abandoned Mine Lands Program (AML), authorized under the Surface Mining Control and Reclamation Act of 1977 provides funding for the abatement of health and safety hazards on lands disturbed by mining prior to enactment of the Act. A good example of the implementation of the AML Program in Wyoming is the A-8 Pit. The reclamation site is located in the East Gas Hills Uranium Mining District of Wyoming. Reclamation activities include selective handling of 3.5 million cubic yards of backfill, controlling pit dewatering and water treatment, installing second order drainage channel and riprap control structures, and salvaging sufficient coversoils and topsoils for site revegetation

  11. 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

    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.

  12. Coal Mine Permit Boundaries

    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...

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

    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...

  14. Open-pit construction

    The conceptual design of a nuclear power plant accordingly to SR 136, situated in deep open pits in rock near the brink of a plateau and accessible from above as well as horizontally from the receiving stream, was further worked out. The increased backfill covering enables the reactor building to withstand heavier external forces and higher internal pressure caused by contaminated atmosphere in the event of severe hypothetical internal accidents. The leakage of this atmosphere is to be collected in special condensation rooms and another part of it is to be cooled down in these rooms. An outer safety barrier and leakage extraction fans keep this atmosphere substantially enclosed. By that means the consequences of a core melt accident will be reduced considerably. (orig.)

  15. 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

    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

  16. 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

    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.

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

    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.

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

    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.

  19. 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

    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。

  20. Coal Mines, Active - Longwall Mining Panels

    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...

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

    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).

  2. 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

    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.

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

    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...

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

    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)

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

    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)

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

    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)

  7. Coal Mines, Abandoned - Digitized Mined Areas

    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...

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

    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.

  9. 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

    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。

  10. Coal Mines Security System

    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.

  11. 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

    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.

  12. Coal mine subsidence

    This paper examines the efficacy of the Department of the Interior's Office of Surface Mining Reclamation and Enforcement's (OSMRE) efforts to implement the federally assisted coal mine subsidence insurance program. Coal mine subsidence, a gradual settling of the earth's surface above an underground mine, can damage nearby land and property. To help protect property owners from subsidence-related damage, the Congress passed legislation in 1984 authorizing OSMRE to make grants of up to $3 million to each state to help the states establish self-sustaining, state-administered insurance programs. Of the 21 eligible states, six Colorado, Indiana, Kentucky, Ohio, West Virginia, and Wyoming applied for grants. This paper reviews the efforts of these six states to develop self-sustaining insurance programs and assessed OSMRE's oversight of those efforts

  13. Dewatering problems at Air Laya open-cast mine, South Sumatra, Indonesia

    Radloff, R.K.

    1988-10-01

    In the area of Bukit Asam, South Sumatra, hard brown coal and higher-ranking coal have been mined in open pits since 1942. Open-pit mines in this area must contend with heavy surface run-off caused by servere tropical storms. After several years of preparatory work, Air Laya open pit started to remove overburden in late 1985; coal has been produced since early 1987. Questions concerning mine dewatering have been of decisive influence in all phases of the project, i.e. planning, development and operation. The climate and surface run-off, the drainage concept, its implementation and problems are gone into. (MOS).

  14. 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

    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.

  15. 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

    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.

  16. Coal mining in Ramagundam

    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)

  17. 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

    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。

  18. Coal mine subsidence

    Longwall coal mining in southern Illinois occurs beneath some of the best agricultural land in the U.S. This region is characterized by highly productive, nearly level, and somewhat poorly drained soils. Subsidence from longwall mining causes changes in surface topography which alters surface and subsurface hydrology. These changes can adversely affect agricultural land by creating wet or ponded areas that can be deleterious to crop production. While most subsided areas show little impact from subsidence, some areas experience total crop failure. Coal companies are required by law to mitigate subsidence damage to cropland. The objective of this paper is to test the effectiveness of mitigation in restoring grain yields to their pre-mined levels. The research was conducted on sites selected to represent conventional mitigation techniques on the predominate soils in the area. Corn (Zea mays L.) and soybean [Glycine max.(L.) Merr] yields in 1988, 1989, 1990, and 1991 from mitigated areas were compared to yields from nearby undisturbed areas

  19. 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

    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。

  20. Coal Mine Methane in Russia

    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.

  1. Project design of an open pit colliery in Terkidag, Turkey

    In this manuscript, first of all, the status of Turkey in terms of energy production and consumption is given and the need to rely on domestic sources, namely lignite deposits, is emphasized rather than importing fuels from abroad. Then, a thorough literature work concerning open pit design and production planning is explained in detail. On this basis, the project design and production planning of Tekirdag-Saray open pit colliery are conducted. According to the selected production technique, machinery-equipment that will be utilized in the coal winning system is determined and in the final part, the investment cost and unit production cost regarding the project are computed and the importance of constructing a power plant in the region operating with domestic fuels is expressed. (authors)

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

    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.

  3. Coal mine subsidence and structures

    Underground coal mining has occurred beneath 32 x 109m2 (8 million acres) of land in the United States and will eventually extend beneath 162 x 109m2 (40 million acres). Most of this mining has taken place and will take place in the eastern half of the United States. In areas of abandoned mines where total extraction was not achieved, roof collapse, crushing of coal pillars, or punching of coal pillars into softer mine floor or roof rock is now resulting in sinkhole or trough subsidence tens or even hundreds of years after mining. Difference in geology, in mining, and building construction practice between Europe and the United States preclude direct transfer of European subsidence engineering experience. Building damage cannot be related simply to tensile and compressive strains at the ground surface. Recognition of the subsidence damage role played by ground-structure interaction and by structural details is needed

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

    Miguel Alvarado; Felipe Gonzalez; Andrew Fletcher; Ashray Doshi

    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 pr...

  5. Mining technology and policy issues 1983

    This book presents conference papers on advances in mineral processing, coal mining, communications for mining executives, environmental laws and regulations, exploration philosophy, exploration technology, government controls and the environment, management, mine finance, minerals availability, mine safety, occupational health, open pit mining, the precious metals outlook, public lands, system improvements in processing ores, and underground mining. Topics considered include coal pipelines and saline water, an incentive program for coal mines, sandwich belt high-angle conveyors, the development of a mining company, regulations for radionuclides, contracts for western coal production for Pacific Rim exports, and the control of radon daughters in underground mines

  6. 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

    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.

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

    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.

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

    Chang, Qingliang; Zhou, Huaqiang; Bai, Jianbiao

    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 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. PMID:25258737

  9. Coal mining - custodian or culprit

    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.

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

    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.

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

    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

  12. Cost of mining Eastern coal

    This paper, Chapter 7.2.3 of the 'surface mining' reference book, gives an example of how the cost of mining a ton of coal is calculated. Conditions set down are for a coal tract of 50.6 ha in West Virginia, USA to be mined by the contour surface method, the seam being 101.6cm thick. Elements of the costing are: permitting and bonding costs, engineering and construction costs, equipment and other operating expenses (such as hauling and wheeling), royalties, direct taxes and fees, costs of revegetation, and employment costs (payroll and medical expenses). 5 tabs

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

    Wenchen Fan; Ping Cao; Ke Zhang; Kaihui Li; Chong Chen

    2015-01-01

    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 wh...

  14. Coal Mining-Related Respiratory Diseases

    ... 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 ...

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

    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.

  16. Study on Environment Characteristics for Mining Management at East Pit 3 West Banko Coal Mine

    Neny Rochyani

    2014-01-01

    Full Text Available The management on mining environment is closely related to the environmental characteristics and the condition of mining itself.  In East PIT 3 West Banko Coal Mine Tanjung Enim mine drainage system has been developed which refers to the open pit method employed by the company. The observation and analysis showed that the sludge settling ponds have been constructed as well as adequate catchment area. To discharge water into the channel at 0.3016 m 3 / sec can still be accommodated due to the dimensions of the channel that can accommodate an intake capacity of 1,639 m 3 / sec. While the use of lime made in the settling ponds  with the ratio of 0.7 g: 1 liter of water indicates the water quality test results that meet the environmental quality standards that the pH is 6.7 with a TSS of 12mg / l Fe content was 2.1580 mg / l and Mn content of 1.3 mg / l.

  17. 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

    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.

  18. 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

    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.

  19. Strategic Management of Coal Mining Industry Efficiency

    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...

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

    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...

  1. 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

    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

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

    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}

  3. Coal mining needs a differentiating approach

    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.

  4. 30 CFR 49.20 - Requirements for all coal mines.

    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...

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

    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.

  6. Impact of Coal Mining on Environment

    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 ...

  7. Open-pit production and control at Roessing

    In recent years metal prices have been severely depressed and most companies have directed efforts to controlling costs in order to stay in business. Roessing Uranium has consistently kept uranium production cost increases well below the domestic inflation rate and this has been the result of a firm commitment to production and cost control, which is the main theme of this paper. The subject of cost analysis is briefly presented and the paper then gives more technical detail under the main headings of grade control, production control and engineering projects. The main communication channels, which are used to ensure that different departments on the mine are all working for the same objectives, are mentioned. The paper, however, is intended to be a general overview of the engineering aspects of open-pit cost control

  8. Nasal mucociliary clearance in coal mine workers

    Cinar, F.; Beder, L. [Karaelmas University, Kozlu Zonguldak (Turkey)

    2004-06-01

    The purpose of this study was to analyze the effect of coal dust particles on nasal mucociliary function in coal mine workers. Using the saccharin method, nasal mucociliary clearance was determined for 77 subjects, of which 39 who worked in a coal mine were actively exposed to coal dust whereas 38 were unexposed control subjects. The measurements were performed in the coal mine, at the level of 170 m below sea level. The average saccharin nasal transit time in coal mine workers, 12.61 (SD: 4.30) minutes, is longer, than that of the control subjects, 10.97 (SD: 3.22). Although the findings of this study demonstrate that the coal particles affect the nasal mucociliary clearance, the difference in saccharin nasal transit time between the two groups (exposed vs unexposed) is not statistically significant (P = 0.063).

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

    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

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

    Hackley, Paul C. [U.S. Geological Survey, MS 956 National Center, Reston VA 20192 (United States); Martinez, Manuel [Instituto de Ciencias de la Tierra, Facultad de Ciencias, Universidad Central de Venezuela, Apartado Postal 3895, Caracas 1010 A (Venezuela)

    2007-08-01

    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 Tachira and Merida 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

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

    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...

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

    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...

  13. Coal Mine Methane in Russia [Russian Version

    NONE

    2010-07-01

    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.

  14. 76 FR 63238 - Proximity Detection Systems for Continuous Mining Machines in Underground Coal Mines

    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...

  15. Need for Clean Coal Mining in India

    Sribas Goswami

    2014-01-01

    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...

  16. 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

    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.

  17. Impact of Coal Mining on Environment

    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.

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

    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.

  19. Injury experience in coal mining, 1992

    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.

  20. Injury experience in coal mining, 1990

    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.

  1. Injury experience in coal mining, 1989

    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.

  2. Microbial influences during mining and usage of coal

    A range of interactions of microorganisms with coal is considered. Topics include: coal biodegradation; microorganisms and acid mine drainage; biological treatment of acid coal mine drainage; and bacteria and fly ash leaching. 68 refs

  3. Injury experience in coal mining, 1991

    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.

  4. International opportunities to reduce coal mine methane

    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

  5. 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

    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。

  6. Informationization of coal enterprises and digital mine

    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.

  7. The environmental conditions in coal mining regions

    This report is devoted to the analysis of the main directions of Coal industry damage influence upon the environment. In particular the values of different harmful pollution into air and water are given, and also ground damage from coal mining enterprises is described. The perspectives of the situation improvement are overviewed. 2 refs

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

    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.

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

    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.

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

    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.

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

    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

  12. 78 FR 58567 - Criteria to Certify Coal Mine Rescue Teams

    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...

  13. 30 CFR 49.30 - Requirements for small coal mines.

    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...

  14. 30 CFR 49.40 - Requirements for large coal mines.

    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...

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

    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.

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

    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

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

    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.

  18. The Role of Coal Mine Regulation in Regional Development

    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...

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

    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.

  20. Coal mine helps endangered wallaby survive

    NONE

    1999-02-01

    A central Queensland coal mine is being used to help save one of Australia`s most endangered species from extinction. BHP`s Gregory open-cut coal mine near Emerald has been chosen as a site to undertake a breeding programme for the Bridled Nailtail Wallaby. The Gregory/Crinum mine is an ideal location for the recovery programme because it has a considerable area of nature mixed brigalow and grassland south of mining operations that provide a suitable habitat for the wallabies. 16 nailtails were transferred to a half-acre enclosure at Gregory in early 1997; numbers had doubled to 32 by November 1998. The small wallaby is so named after its distinctive `bridal` marking on its shoulders and the horny projection at the tip of its tail. 2 photos.

  1. Coal mine ground control. 3rd ed.

    Peng, S.S.

    2008-09-15

    The third edition not only completely revises and updates the original subject areas, but also is broadened to include a number of new topics such as high horizontal stresses, computer modeling, and highwall stability. The subject areas covered in this book define the current field of coal mine ground control, except for the recently emerging topic of mine seals and some conventional subjects such as coal/rock cutting and impoundment dams. It contains 1,134 references from all published sources, and archived since 1876.

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

    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...

  3. 30 CFR 716.4 - Special bituminous coal mines.

    2010-07-01

    ... 30 Mineral Resources 3 2010-07-01 2010-07-01 false Special bituminous coal mines. 716.4 Section... INTERIOR INITIAL PROGRAM REGULATIONS SPECIAL PERFORMANCE STANDARDS § 716.4 Special bituminous coal mines. (a) Definition. Special bituminous coal surface mines as used in this section means those...

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

    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.

  5. 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

    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

  6. 76 FR 70075 - Proximity Detection Systems for Continuous Mining Machines in Underground Coal Mines

    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....

  7. Strategic Management of Coal Mining Industry Efficiency

    Olga Tkacheva

    2015-06-01

    Full Text Available 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 solutions offer an innovative approach to strategic management of the industry of the country, which includes: establishing a common standard in the monitoring, analysis and evaluation of the situation, management decision-making at all levels of corporate and public governance; elimination of dogmatism in the organization of corporate and public governance, encouraging maximum independence and initiative of corporate management in the framework of national development strategies; Schooling management training to all levels of management autonomy, rapid, and therefore efficient and effective management within the company's strategy; creation of a unified and transparent system of monitoring of management decisions and increase the level of responsibility of managers at all levels and branches of government for the implementation of the national strategy, and within it is a strategy of smaller entities. The result of the joint implementation of the proposed principles in the organization of strategic management at different levels of management should be a combination of freedom in solving economic problems and personal initiative managers.

  8. Greenhouse gas emission from Australian coal mining

    Since 1997, when the Australian Coal Association (ACA) signed a letter of Intent in respect of the governments Greenhouse Challenge Program, it has encouraged its member companies to participate. Earlier this year, the ACA commissioned an independent scoping study on greenhouse gas emissions in the black coal mining industry This was to provide background information, including identification of information gaps and R and D needs, to guide the formulation of a strategy for the mitigation of greenhouse gas emissions associated with the mining, processing and handling of black coals in Australia. A first step in the process of reducing emission levels is an appreciation of the source, quantity and type of emissions om nine sites. It is shown that greenhouse gas emissions on mine sites come from five sources: energy consumption during mining activities, the coal seam gas liberated due to the extraction process i.e. fugitive emissions, oxidation of carbonaceous wastes, land use, and embodied energy. Also listed are indications of the degree of uncertainty associated with each of the estimates

  9. Need for Clean Coal Mining in India

    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.

  10. Need for Clean Coal Mining in India

    Sribas Goswami

    2014-01-01

    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.DOI: http://dx.doi.org/10.5755/j01.erem.66.4.4870

  11. Radon concentration measurements in bituminous coal mines

    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)

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

    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.

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

    Lee, U.J.; Kim, J.A.; Kim, S.S. [Coal Industry Promotion Board, Seoul (Korea, Republic of); Kim, W.K.; Yoon, S.H.; Choi, J.K. [Ssangyong Information and Communication Corp., Seoul (Korea, Republic of)

    2005-07-01

    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)

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

    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)

  15. Coal mining in Bangladesh: Options to mitigate environmental impacts

    Angen, Meara Rose

    2008-01-01

    This study examines methods of mitigating the environmental impacts of coal mining in Bangladesh. Coal is expected to aid in providing energy security for the country in the short-term. The coal mining industry is currently in its infancy, and no policy exists. This study examines the government policies of three diverse countries and discovers that there are several instruments commonly used to reduce the environmental impacts of coal mining. These instruments include regulations that set st...

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

    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.

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

    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.

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

    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.

  19. 76 FR 54163 - Proximity Detection Systems for Continuous Mining Machines in Underground Coal Mines

    2011-08-31

    ... using a proximity detection system. Of the deaths in underground coal mines from 1984 through 2010, MSHA... accidents in underground coal mines, approximately 220 could have been prevented with proximity detection... underground coal mines where a proximity detection system could have warned the miners and stopped...

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

    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.

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

    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...

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

    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

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

    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...

  4. 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

    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.

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

    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.

  6. On Future Coal Mining and Human Underground Activity

    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.

  7. 78 FR 79010 - Criteria to Certify Coal Mine Rescue Teams

    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....

  8. 78 FR 58264 - Refuge Alternatives for Underground Coal Mines

    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...

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

    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.

  10. Environmental damage and countermeasures in Chinese coal mine areas

    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

  11. Conversion of Coal Mine Gas to LNG

    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.

  12. Modelling of gravity changes in mining areas

    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.

  13. Monitoring of radon daughters in coal-mine atmospheres

    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)

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

    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,...

  15. Introduction to the coal mining industry in China

    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

  16. Subsidence and reclamation in coal mine areas of China

    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

  17. PROBLEMS AND COUNTERMEASURES OF ENVIRONMENTAL PROTECTION IN COAL MINES

    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.

  18. Burnout in Chinese coal mine safety supervision

    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

  19. Impacts of Coal Seam Gas (Coal Bed Methane) and Coal Mining on Water Resources in Australia

    Post, D. A.

    2013-12-01

    Mining of coal bed methane deposits (termed ';coal seam gas' in Australia) is a rapidly growing source of natural gas in Australia. Indeed, expansion of the industry is occurring so quickly that in some cases, legislation is struggling to keep up with this expansion. Perhaps because of this, community concern about the impacts of coal seam gas development is very strong. Responding to these concerns, the Australian Government has recently established an Independent Expert Scientific Committee (IESC) to provide advice to the Commonwealth and state regulators on potential water-related impacts of coal seam gas and large coal mining developments. In order to provide the underlying science to the IESC, a program of ';bioregional assessments' has been implemented. One aim of these bioregional assessments is to improve our understanding of the connectivity between the impacts of coal seam gas extraction and groundwater aquifers, as well as their connection to surface water. A bioregional assessment can be defined as a scientific analysis of the ecology, hydrology, geology and hydrogeology of a bioregion, with explicit assessment of the potential direct, indirect and cumulative impacts of coal seam gas and large coal mining development on water resources. These bioregional assessments are now being carried out across large portions of eastern Australia which are underlain by coal reserves. This presentation will provide an overview of the issues related to the impacts of coal seam gas and coal mining on water resources in Australia. The methodology of undertaking bioregional assessments will be described, and the application of this methodology to six priority bioregions in eastern Australia will be detailed. Preliminary results of the program of research to date will be assessed in light of the requirements of the IESC to provide independent advice to the Commonwealth and State governments. Finally, parallels between the expansion of the industry in Australia with that

  20. Coal mining in Saarland; Der Steinkohlenbergbau im Saarland

    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.)

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

    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.)

  2. Microbial ecology of coal mine refuse

    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.

  3. STABILITY ANALYSES OF FOOTWALL SLOPES IN OPEN PIT MINING

    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.

  4. 4D seismic data acquisition method during coal mining

    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)

  5. Monitoring light hydrocarbons in Brazilian coal mines and in confined coal samples

    Monitoring light hydrocarbons (LHCs) in coal mines, particularly methane, is important not only because of their implications for global climate change but also for economic and safety reasons. Furthermore, the identification and quantification of LHCs in coal mine air samples and desorbed from confined coal may contribute to a better understanding of coal seam characteristics. The paucity of information about the levels of methane in Brazilian underground coal mines can be attributed to their difficult access and a lack of adequate procedures for correct gas sampling. The aim of this study is to optimize and apply standard gas chromatography procedures to determine LHC levels in the air of coal mines and in confined coal from five mines under operation, three underground (A, B, C) and two surface (D, E) mines, in southern Brazil. The results indicate methane (C1) levels varying from 3 ppm to 27% in the atmosphere of the underground mines. Mine A presented high levels of all LHCs analyzed (C1 to C5), while only C1 and C2 were detected in mine B, and hydrocarbons ranging from C1 to C4 were found in mine C. On the other hand, surface mines presented narrow concentration range for C1 (3 ppm to 470 ppm) and C2-C3, with higher levels observed for puncture explosive points. Among LHCs, methane is desorbed in higher concentrations from confined coals and the presence of C2 was detected in all samples while C3-C5 were only observed in coals from underground mines. These data are consistent with those obtained from the air gas samples collected in the mines under study. Geological events such as faulting and intrusions can accelerate the release of gas or the trapping of large amounts of previously released methane. The LHC emissions from coal mines were found to be highly variable, indicating the need for a comprehensive survey of Brazilian coal mine emissions. (author)

  6. Good prospects for Indonesia's coal mining industry

    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.

  7. 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

    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

  8. 30 CFR 75.1907 - Diesel-powered equipment intended for use in underground coal mines.

    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...

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

    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.

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

    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.

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

    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.

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

    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.

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

    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.

  14. Overview of Deep Coal Mining in the Czech Republic

    Holub, Karel

    1. Houston: Studium Press LLC, 2015 - (Sivakumar, S.; Sharma, U.; Prasad, R.), s. 91-119. (Energy Science and Technology Series. Volume 2). ISBN 1-62699-063-8 Institutional support: RVO:68145535 Keywords : Ostrava - Karviná coal basin * induced seismicity * rockburst * geomechanics * preventive measures Subject RIV: DH - Mining , incl. Coal Mining

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

    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...

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

    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...

  17. Regulations enforcing better environment protection in Polish coal mines

    Polish coal mining industry is unprofitable. In 1998 year the Council of Ministers launched the 'Reform of coal mining industry in Poland in the years 1998 - 2002'. This 'Reform' assumes a deep restructuring of the industry with the aim to make it economically efficient and sounder to environment. After one year of the 'Reform' realization it occurred that mainly because of the dramatic change in the coal market in Poland, some additional legal regulation are needed to achieve the aims of the reform. In the 'Correction' of the reform, in spite of deeper technical restructuring of the industry, including additional mines closing, a special stress is put on regulations concerning investments for environmental protection. The paper describes general regulations concerning environment protection in mineral industry and the specific solutions proposed for coal mines in restructuring process in a wide view of the present economic situation of coal mines. 4 refs

  18. Coal mining applications of CdTe gamma ray sensors

    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).

  19. Coal mining applications of CdTe gamma ray sensors

    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)

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

    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.

  1. Investigation of relationship between barometric pressure and coal and gas outburst events in underground coal mining

    Yönet, Sinem; Esen, Olgun; Fişne, Abdullah

    2015-04-01

    Coal and gas outburst is a serious risk which occurs during the mine production. This accident results both ejection of high volumes of gas and high amount of coal into the mine production area, and death of mining workers for many years in Turkey. Outburst of gas, coal and rock can be defined as sudden release of coal and rock accompanied by large quantities of gas into the working face or other mine workings. It is a phenomena that influenced by geological structure such as folds, joints of rocks or coal seams, is also still investigated for many years. Zonguldak Coal Basin is the main part of the Upper Carboniferous bituminous coal basin of Turkey. Much of the bituminous coal mining has thus been concentrated in the Zonguldak Basin which is located on the Black Sea coast. The coal field has been disturbed by tectonic activity, first by Hercynian and later by Alpine orogenesis resulting in folding and faulting of strata. This formation has a complex structural geology which consists mostly fault zones, anticlinal and syncline strata and because of this a large amount of methane gases are adsorbed or accumulated in strata or in coal fractures, pores and micropores. There are 5 Collieries exists in Zonguldak Coalfield and coal and gas outbursts were occurred only in two collieries such as Karadon and Kozlu Mines. In addition at a number of 90 coal and gas outburst events were experienced in these collieries. Based on the analysis of data, oscillation at barometric pressure and temperature values at the location of Kozlu and Karadon Mines were seen when coal and gas outburst events were occurred. In this study, barometric pressure and temperature changes are investigated at Kozlu and Karadon Mines. Also the relationship between the variation at temperature with barometric pressure and coal and gas outbursts are evaluated. It can be understand that this investigation depends to field observations and macroscopic considerations and on the purpose of predicting the

  2. Unionism and Productivity in West Virginia Coal Mining.

    Boal, William M.

    1990-01-01

    This study presents econometric estimates of the effects of unionism on productivity in 83 West Virginia coal mines in the early 1920s. Results show that unionism significantly reduced productivity at small mines but not at large mines. The author ascribes this effect to systematic differences between small and large operations in the quality of…

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

    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.

  4. Environmental impacts of brown coal surface mining and processing

    The proceedings contain 9 contributions, out of which 2 have been inputted in INIS. These are concerned with the impacts of mining in the North Bohemian Brown Coal Mining District on the air quality and public health, and with the effect of mined-out land reclamation on the environment. (M.D.). 8 tabs., 5 figs., 6 refs

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

    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)

  6. Environmental radioactivity around the former coal mine in Kocevje (Slovenia)

    Radioactivity in the environment arising from the high uranium content of brown coal from the former coal mine in Kocevje was investigated. Enhanced levels of gamma dose-rate and radionuclide content were found on the tailings and in deposited coal, respectively. Outdoor radon concentrations were found to be probably the highest in the country, due to the high radon potential in background soil and in the coal tailings area, as well as the topographical and climatic characteristics of the site. (author)

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

    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.

  8. Coal mining GPS subsidence monitoring technology and its application

    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.

  9. Analysis on safety production in coal mines Henan Province

    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.

  10. 30 CFR 75.1107-11 - Extinguishing agents; requirements on mining equipment employed in low coal.

    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...

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

    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.

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

    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 ...

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

    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.

  14. 75 FR 57849 - Maintenance of Incombustible Content of Rock Dust in Underground Coal Mines

    2010-09-23

    ... 30, 1987); Training and mine evacuation procedures for underground coal mines (67 FR 76658, Dec. 12...--Training and Mine Evacuation Procedures for Underground Coal Mines (67 FR 76658) Dec. 12, 2002. Department.... 2009. Recent Coal Dust Particle Size Surveys and the Implications for Mine Explosions. (74 FR...

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

    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

  16. Analysis on Backfill Mining of “Under Three” Coal in Zhouyuanshan Mine and Strata Movement Law

    Weijian Yu; Bo Xu; Tao Feng; Xinyuan Chen

    2013-01-01

    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 a...

  17. The Economic Impact of Coal Mining in New Mexico

    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.

  18. Environmental geochemistry of acid mine drainage water at Indus coal mine at Lakhra, Sindh Pakistan

    The annual coal production of Pakistan is about 3,637, 825 tones which is about 6% of the country's energy resources, out of this 1,241, 965 tones of coal was produced/ mined from the Lakhra coal field, District Dadu, Sindh which after the Thar coal field is the second largest coal field of Pakistan. At this coal field more than 58 mining companies are engaged in exploring the hidden wealth of the country. The problem of acid mine drainage, is caused by the passage or seepage of water, through mines where iron disulfides, usually pyrites, are exposed to the oxidizing action of water, air and bacteria, is the main problem faced by the mining companies. The geochemical analysis of acid mine drainage water collected from Indus coal mine no. 6 shows that beside its higher pH, total Dissolved Solids and Sulfates, it also posses higher amount of heavy metals like Cd, Cu, Pb, Co, Ni and Fe. This acid mine drainage water not only damages the mine structures but is also harmful to soil and ecology. (author)

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

    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)

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

    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.

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

    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.

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

    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

  3. Operation and manning of the Rietspruit opencast coal mine

    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.

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

    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

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

    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.

  6. Coal properties and mine operational factors that impact gas drainage

    Black, D.J.; Aziz, N.I. [Wollongong Univ., Wollongong, NSW (Australia)

    2010-07-01

    Areas of increased gas content, which are difficult to drain, are encountered in many underground coal mines in Australia. Several factors have the potential to influence the overall efficiency and effectiveness of gas drainage from the mined coal seam. This paper reported on a study that was conducted at an operating coal mine in the Bulli seam of Australia's Illawarra coal measures. Gas composition in the mining domain ranged from almost pure methane in the east to almost pure carbon dioxide in the west. Gas production data from many inseam gas drainage boreholes was evaluated relative to a variety of coal properties and mine operational factors to determine their impact on gas production performance. The study showed that although the design of the boreholes and the drainage time had some impact on gas production, the coal properties were found to have the greatest impact. In particular, coal rank, ash content, gas content, seam thickness and gas composition all had an influence on gas production. The total gas in place and degree of saturation had the most significant impact on coal seam gas production performance. Several recommendations were made to optimize gas drainage productivity. 3 refs., 12 figs.

  7. Roof Rockmass Characterization in an Illinois Underground Coal Mine

    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.

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

    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...

  9. 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

    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。

  10. Ground engineering principles and practices for underground coal mining

    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...

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

    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.

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

    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.

  13. Polish legal regulations considering recovery of secondary materials from coal mining dumping grounds

    Gawor Łukasz

    2014-01-01

    In the article there is presented temporary situation of coal mining dumping grounds in Poland – their inventarization, localization and environmental impacts. The coal mining dumping grounds in Poland are situated in three coal basins: Upper Silesian Coal Basin, Lower Silesian Coal Basin and Lublin Coal Basin. In all mentioned areas occur ca. 270 coal mining waste dumps, covering surface of over 4400 ha. The main environmental impacts connected with dumping grounds are fire hazards, water po...

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

    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.

  15. Characterization and effectiveness of remining abandoned coal mines in Pennsylvania

    Under an approved remining program, mine operators can remine abandoned coal mines without assuming legal responsibility for treatment of the previously degraded water, as long as the discharging waters are not further degraded and other regulatory requirements are satisfied. A US Bureau of Mines review of 105 remining permits in Pennsylvania indicates that remining results in substantial reclamation of abandoned mine lands, utilization of significant quantities of coal, and reduction of contaminant loads (acidity and iron) from degraded mine drainage discharges. Normality tests performed on the water quality and flow data indicate generally nonnormal distributions and extreme right-skewness tending toward lower values. The water quality of underground coal mines was observed to be more highly degraded in terms of acidity, iron, and sulfate than that of surface coal mines. The optimum baseline sampling scenario is 12 months in duration at a frequency of one sample per month. Analysis of water quality and flow rates before and after remining indicates that a majority of the mines exhibited either no change or a significant decrease in pollution rate because of remining. The discharge flow rate was the dominant controlling factor when the post-remining contaminant load was significantly better or worse than the baseline (pre-mining) load

  16. Mining of coal pillars using the drilling method

    An assessment of possibilities of utilizing other coal mining methods not used yet under conditions of rock and gas outburst hazard in the Ostrava-Karvina Coalfield (henceforth referred to as OKR) in the Czech Republic is one of outputs of the research project 'Protection of Employees against Consequences of Rock and Gas Outbursts'. These methods were to supplement a single method that had been in common use by then - longwall mining along the strike, and were to ensure the better recovery of coal reserves. Specifically, it was the case of mining of residual pillars blocking a considerable quantity of coal. What was chosen was a promising mining method utilising long large diameter boreholes. In the article the experience of application of this mining method abroad as well as under conditions of OKR in seams with a hazard of rock and gas outbursts is presented. (authors)

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

    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

  18. 75 FR 20918 - High-Voltage Continuous Mining Machine Standard for Underground Coal Mines

    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...

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

    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.

  20. Capture and Use of Coal Mine Ventilation Air Methane

    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).

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

    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.

  2. Environmental Impact Assessment of Coal Mining: Indian Scenario

    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.

  3. Coal mine safety regulation in China and the USA

    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.

  4. Trust and safety in the coal mining sector

    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.

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

    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.

  6. Coal mining in the power industry of the Federal Republic of Germany in 2014

    The contribution under consideration reports on the coal mining in the Federal Republic of Germany in the year 2014. Statistical data are presented for the power market and coal market, hard coal mining as well as the brown coal mining. These data consider the energy consumption in Germany, power production, iron and steel production, utilization, re-cultivation and employees.

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

    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

  8. Rockbursts provoked by destress blasting in hard coal longwall mining

    Koníček, Petr; Souček, Kamil; Staš, Lubomír

    London : CRC Press Taylor and Francis Group, Balkema, 2013 - (Singh, P.; Sinha, A.), s. 193-202 ISBN 978-0-415-62143-4. - (Fragblast. 10). [International Symposium on Rock Fragmentation by Blasting. New Dehli (IN), 26.11.2012-29.11.2012] R&D Projects: GA MV VG20102014034 Institutional support: RVO:68145535 Keywords : destress blasting * rockburst hazard * mining industry Subject RIV: DH - Mining , incl. Coal Mining http://www.crcnetbase.com/doi/abs/10.1201/b13759-25

  9. 30 CFR 816.87 - Coal mine waste: Burning and burned waste utilization.

    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...

  10. 30 CFR 817.87 - Coal mine waste: Burning and burned waste utilization.

    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...

  11. 77 FR 58170 - Proposed Renewal of Existing Information Collection; Fire Protection (Underground Coal Mines)

    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...

  12. Land restoration after strip mining for coal

    Rickard, W. H.

    1977-01-01

    Recent legislation requires that lands surface mined for coal be returned to approximate original topography and vegetative cover be restored. Spoils provide poor rooting habitat because of extreme stoniness or excessive slope steepness which provide few niches for seeds to become lodged and also spoil may provide poor mineral nutrition, poor water retention and sometimes the spoil may even have chemical properties detrimental to plant growth (acidity, alkalinity or even unusually large amounts of toxic mineral elements i.e., copper, sodium). To provide a substrate better suited for plant growth, recommendations for restoration call for deep burial of unfavorable substrate components i.e., rocks and materials of unusual chemistry and the dressing of reshaped spoil with topsoil i.e., material with the most favorable properties for plant growth. Even though all the substrate requirements for healthy plant growth may be met, such as adding a form of available nitrogen as fertilizer, plants will not grow if weather conditions are extreme. For example, in very dry (desert) climates precipitation may be too scanty or too erratic to permit the successful establishment of many kinds of plants. Even under the most favorable conditions plant productivity averaged over a period of years is low. Also in very cold climates the growing season may be limited to only a few weeks in summer e.g., arctic and alpine tundra regions. This shortens the time available for photosynthesis and keeps plant productivity low.

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

    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.

  14. Environmental problems in Russian coal industry

    The state of the Russian coal industry is complicated both economically and environmentally. Most mines are unprofitable. Several coal mines are intended to be closed. So, under existing conditions, coal mines are unable to give much attention to environmental protection problems. At the same time, coal mining is one of the most polluting industries. The main trends in this industry's negative influence upon the environment are: land spoilage and immobilization to lay out open-pit mines and mineral waste dump areas and tailing piles as well as with industrial waste water runoff; atmospheric pollution with the air coming from underground and substances blown off from dumps, hydrogeological regime intervention in coal mining areas, etc. One way to solve environmental problems in coal mining is a more rational utilization of the accompanying natural coal resources. Such measures make it possible to obtain complementary profits not only at the expense of reducing environmental destruction but producing new kinds of goods or services as well. Examples of similar solutions are solid mineral wastes utilization, underground space utilization, coal gas utilization and other issues

  15. Coal mine methane management, Nord‐Pas‐de‐Calais (France)

    Défossez, Pierrick; Lemal, Sandrine; Schumacher, Jean-Paul

    2013-01-01

    A coal mine, once closed, still "lives". Coal beds release methane, which is then trapped in the mine voids by water rising as a result of natural flooding. The consequence is a rise of pressure (a well‐known phenomenon in every coalfield) which may be dangerous, because gas can migrate directly to the surface. Controlling mine gas risk is essential for safety reasons, due to methane's highly flammable nature. A control methodology was developed by the original operator and starting on this b...

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

    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 ...

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

    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.

  18. Study on durability of concrete in coal mine

    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.

  19. Study on durability of concrete in coal mine

    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.

  20. Simulating the Various Subsystems of a Coal Mine

    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.

  1. Determination of coal mine mechanization using fuzzy logic

    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.

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

    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.

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

    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.

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

    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.

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

    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.

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

    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...

  7. Research on One Borehole Hydraulic Coal Mining System

    XIA, Bairu; ZENG, Xiping; MAO, Zhixin

    The Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using high-pressure water jet. Then the mixture of coal and water as slurry are driven out of the borehole by hydraulic or air-lifting method, and are separated at the surface. This paper presents a case study of hydraulic borehole coal mining. The three key techniques of the BHCMS, namely, hydraulic lift of jet pump, air lift, and water jet disintegration are discussed and analyzed in this paper based on theoretical analysis and field experiments. Some useful findings have been obtained: (1) The design of jet pump, air lift system, and water jet has to be integrated appropriately in order to improve mining efficiency and coal recovery rate, and to decrease energy consumption. The design of hydraulic lift jet pump must meet the requirement of the minimum floating speed of coal particles. The optimization of nondimensional parameters and prevention of cavitation have to be considered in the design; (2) With regard to selecting the nozzle types of jet pump, center nozzle or annular nozzle can be selected according to the size of the removed particles; (3) Through air-lift and back pressure, the water head can be decreased to improve the lift capacity of jet pump and decrease the power loss. The air lift has great limitation if it is used solely to extract coal, but if it is employed in conjunction with jet pump, the lift capacity of jet pump can be increased greatly; (4) With water jets, the air lift can improve the fragmentation radius and capacity. The main factors that affect the effect of water jet are the submergible status of jet, jet pressure, and flowrate. The ideal jet of the monitor in the borehole hydraulic coal-mining system is a nonsubmergible free jet. Through air lift, the nonsubmergible free jet can be set up in the mining hole.

  8. Effect of mining and utilizing bone coal on environment

    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

  9. Coal Mining vis-â-vis Agriculture in India: A Question of Sustainability

    Sribas Goswami; Ramananda Goswami

    2015-01-01

    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, ...

  10. Restoration of abandoned mine lands through cooperative coal resource evaluations

    The public reclamation cost of reclaiming all of Pennsylvania's abandoned mine lands is estimated at $15 billion. Drainage from abandoned mines poses another $5 billion water pollution clean-up problem. Although it is unlikely that public reclamation alone could ever tackle these problems, much can be done to alleviate the nuisances through the remining of previously mined areas to recover remaining reserves, restore the land and improve water quality in the same process. Remining of priority areas is encouraged through a new Pennsylvania policy which provides incentives to mining companies. One incentive, initiated under Pennsylvania's comprehensive mine reclamation strategy, is to identify and geologically map reminable coal resources in selected watersheds, and then to expedite mine permitting in these watersheds. At present, two such priority watersheds, Little Toby Creek in Elk County and Tangascootak Creek in Clinton County, are the focus of geologic map compilation based on recent quadrangle mapping, or new, directed, geologic mapping, including new research core drilling to establish the geologic stratigraphic framework. In order to maximize environmental benefits the comprehensive mine reclamation strategy identifies watersheds which are affected by acid mine drainage (AMD), but that are reasonably capable of restoration, if sufficient coal reserves remain. Pennsylvania's geochemical quality database of rock overburden, in combination with detailed coal resource mapping by the Pennsylvania Geological Survey, and the cooperation of coal companies and leaseholders, is being used by the Department of Environmental Protection (DEP) to identify and design remining projects which will not only allow the recovery of coal resources, but will also improve the water quality through a variety of innovative mining techniques

  11. Utilization of coal ash/coal combustion products for mine reclamation

    Society's demand for an inexpensive fuel, combined with ignorance of the long term impacts, has left numerous scars on the Pennsylvania landscape. There are over 250,000 acres of abandoned surface mines with dangerous highwalls and water filled pits. About 2,400 miles of streams do not meet water quality standards because of drainage from abandoned mines. There are uncounted households without an adequate water supply due to past mining practices. Mine fires and mine subsidence plague many Pennsylvania communities. The estimated cost to reclaim these past scars is over $15 billion. The beneficial use of coal ash in Pennsylvania for mine reclamation and mine drainage pollution abatement projects increased during the past ten years. The increase is primarily due to procedural and regulatory changes by the Department of Environmental Protection (DEP). Prior to 1986, DEP required a mining permit and a separate waste disposal permit for the use of coal ash in backfilling and reclaiming a surface mine site. In order to eliminate the dual permitting requirements and promote mine reclamation, procedural changes now allow a single permit which authorize both mining and the use of coal ash in reclaiming active and abandoned pits. The actual ash placement, however, must be conducted in accordance with the technical specifications in the solid waste regulations

  12. 78 FR 35974 - Proposed Information Collection; Comment Request; Coal Mine Rescue Teams; Arrangements for...

    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;...

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

    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)

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

    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.

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

    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.

  16. Greenhouse research to curb emission from coal mines

    According to David Williams, senior research scientist and member of the CSIRO Energy Technology's air quality group, greenhouse gas (GHG) emissions come from five sources in coal mining. These include energy consumption during mining activities, fugitive emissions (coal seam gas liberated in the extraction process), oxidation of carbonaceous wastes, landuse and embodied energy. Total emissions are dominated by contributions from the first three. Both fugitive and waste oxidation emissions from opencut operations come from 'area' sources and their magnitudes are poorly known. Although there may be no measurable gas in freshly uncovered open cut coal, such mines usually emit methane that can be detected and sometimes quantified by air pollution techniques. Reporting on a recent research program into GHG emissions in the black coal mining industry commissioned by the Australian Coal Association (ACA), Williams maintains that research indicates emission rates could be 2040 times higher than the overall estimate for emissions from this source for opencut mines in Australia. The overall objective of the project is to provide methods that are supported by direct measurement to quantify the emissions of GHG and options for the disposal and /or use of methane emissions as an eligible waste-product energy source

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

    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)

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

    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

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

    Walter, W.R.; Hunter, S.L.; Glenn, L.A.

    1996-01-01

    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.

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

    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).

  1. Anthropogenic soils on spoil rock banks in North Bohemian Coal Basin, Czech Republic

    The area of the North Bohemian Coal Basin is devastated by the extensive exploitation of brown coal by open pit mining. Knowledge of newly formed soils, their properties, development and contamination is important from the point of view of biological regeneration of the landscape. The mineralogy of anthropogenic soils from the mining area is presented together with the geochemistry of nutrients and trace elements. Attention is paid to the soil-forming processes in the non-reclaimed spoil rock banks with the development of spontaneous vegetation. 3 refs., 1 fig., 4 tabs

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

    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

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

    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.

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

    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

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

    Shubina, E. A.; Brylin, V. I.; Lukyanov, V. G.; Korotchenko, T. V.

    2015-02-01

    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.

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

    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.

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

    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

  8. Influence of Geological Structure on Coal and Gas Outburst Occurrences in Turkish Underground Coal Mines

    Esen, Olgun; Özer, Samet Can; Fişne, Abdullah

    2015-04-01

    Coal and gas outbursts are sudden and violent releases of gas and in company with coal that result from a complex function of geology, stress regime with gas pressure and gas content of the coal seam. The phenomena is referred to as instantaneous outbursts and have occurred in virtually all the major coal producing countries and have been the cause of major disasters in the world mining industry. All structures from faults to joints and cleats may supply gas or lead to it draining away. Most geological structures influence the way in which gas can drain within coal seams. From among all the geological factors two groups can be distinguished: parameters characterising directly the occurrence and geometry of the coal seams; parameters characterising the tectonic disturbances of the coal seams and neighbouring rocks. Also dykes may act as gas barriers. When the production of the coal seam is advanced in mine working areas, these barriers are failed mostly in the weak and mylonitized zones. Geology also plays a very important role in the outburst process. Coal seams of complex geological structure including faults, folds, and fractured rocks are liable to outbursts if coal seams and neighbouring rocks have high gas content level. The purpose of the study is to enlighten the coal industry in Turkey to improving mine safety in underground coal production and decrease of coal and gas outburst events due to increasing depth of mining process. In Turkey; the years between 1969 and 2013, the number of 90 coal and gas outbursts took place in Zonguldak Hard Coal Basin in both Kozlu and Karadon Collieries. In this study the liability to coal and gas outburst of the coal seams are investigated by measuring the strength of coal and the rock pressure. The correlation between these measurements and the event locations shows that the geological structures resulted in 52 events out of 90 events; 19 events close to the fault zones, 25 events thorough the fault zones and 8 events in

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

    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...

  10. Draining surface mines in the Dnepr coal basin and environmental protection

    Rudnev, E.N.; Spivak, O.A.; Ustinov, S.A.

    1984-11-01

    Mine draining methods used in the Morozovsk and Protopopovsk brown coal surface mines in the Dnepr basin are discussed. Water bearing strata situated above and below coal seams are characterized: types of aquifers, influx rate, filtration properties of rock layers adjacent to coal seams. The following mine draining methods are used in the coal mines: draining from the ground surface by a system of long boreholes, use of underground workings for mine draining, use of trenches situated at the bottom of surface mines. Effects of mine draining on surface water (rivers) and on agriculture in the vicinity of the surface mines are evaluated. The following methods for water pollution control recommended for the coal mines are comparatively evaluated: use of waterproof screens (e.g. layers of clay) for prevention of water leaks from water tanks and water channels used for mine draining, widespread use of long boreholes for mine draining, reducing content of mineral matter in waste water from mine draining.

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

    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. Coal mining situation in the Federal Republic of Germany. The 1st quarter 2015

    The paper reports on the coal mining in the Federal Republic of Germany in the 1st quarter of 2015. Statistical data are presented for mining, exports and imports of hard coal and lignite and for employees.

  13. Radon measurements and valuation in German hard coal underground mines

    Measurements of the radon concentrations by sampling in return air shafts of all hard coal mines in the area of the Chief Mines Inspectorate of the Land NW were carried out by means of a specially designed method of measurement. The dependence of radon concentrations on atmospheric pressure and fan pressure was evaluated on the basis of the measurement results available. Long-term measurements are carried out on the surface of a coal mine at return air shafts, using continuous measuring instruments. For continuous long-term measurements underground, an intrinsically-safe measuring device, which involves processing and storage of the measured values in a CMOS micro-computer, was developed. The radon concentrations which were found are low as compared with maximum levels based on dose/effect correlations put forward by the International Committee for Radiological Protection. Considering radon, the risk of the hard coal miner can therefore be regarded as negligible

  14. Settlement and strength of clay-rich coal mine spoil

    Williams, David; Kho, Adrian; Daley, Andrew [School of Civil Engineering, The University of Queensland (Australia)

    2011-07-01

    The paper discusses the settlement and strength of clay-rich coal mine spoil material, which was sourced from Jeebropilly coal mine in south-east Queensland, Australia. The settlement consists of three components: self-weight, collapse on wetting up, and weathering-induced settlements; 80% of the self-weight settlement of initially dry spoil occurs during placement. Due to corrosion cracking at highly stressed particle contacts, collapse settlement of spoil occurs on wetting up. Weathering-induced spoil settlement occurs over a variable timeframe that depends on durability of the spoil. Laboratory tests included material characterization and geotechnical parameter testing. The characterization of testing methodologies is presented. The results of the tests have implications on the shear strength and settlement of clay-rich spoil materials such as the weathered clayrock found in the upper part of the Jeebropilly coal mine. These implications are detailed and they shed some light on the settlement and strength behavior of these materials.

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

    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.

  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

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

    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.

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

    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.

  19. The influence of coal mining on radon potential

    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.

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

    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. Combining a Spatial Model and Demand Forecasts to Map Future Surface Coal Mining in Appalachia

    Michael P. Strager; Strager, Jacquelyn M.; Evans, Jeffrey S.; Dunscomb, Judy K.; Kreps, Brad J.; Maxwell, Aaron E.

    2015-01-01

    Predicting the locations of future surface coal mining in Appalachia is challenging for a number of reasons. Economic and regulatory factors impact the coal mining industry and forecasts of future coal production do not specifically predict changes in location of future coal production. With the potential environmental impacts from surface coal mining, prediction of the location of future activity would be valuable to decision makers. The goal of this study was to provide a method for predict...

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

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

    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.

  4. Control of coal output at Kislakoy opencast mine, Elbistan, Turkey

    Ural, S. [Cukurova Univ., Adana (Turkey). Faculty of Engineering; Onur, A.H. [Dokuz Eylul Univ., Izmir (Turkey). Faculty of Engineering

    2001-03-01

    Wide variation of coal quality in the Afsin-Elbistan deposit, limitations imposed by the specification of the power station boilers and the quality control procedure necessitate the timely availability of accurate and reliable data if the coal mine is to be utilized more efficiently. Kislakoy Mining Operator (TEAS) is placing increased emphasis on the production of coal that will meet the needs of power stations. From the boiler operation point of view, the upper and lower parts of the coal bed present different characteristics. For this reason, the coal bed was divided into upper and lower sections. Coal grindability and LCV/Ash relationship can severely inhibit efficient boiler operation. Coals of Kislakoy mining field are classified as standard and critical coals. Only 8% of the upper Kislakoy coals and 25% of the lower Kislakoy coals are regarded as standard coal. Nearly 85% of the MISI values of the upper Kislakoy coals are smaller than 41% and 70% of the MISI values of the lower Kislakoy coals are greater than 49%. In-pit and stockpile blending methods are applied to utilize the reserves of Kislakoy mining field as fully as possible. The software MODEL was developed to optimize the production planning and quality control. On-line analysis should be introduced to support the current procedure in a more efficient way. (orig.) [German] Zweck des vorliegenden Berichts ist es, ueber die in dem Afsin-Elbistan Braunkohlentagebau angewandten Verfahren zur Steuerung der Foerderqualitaet zu informieren. Die Bedingung, dass keine Kohlenlieferung die vertraglich festgelegten Kohlenqualitaetsbestimmung uebertreffen sollte, ist erfolgreich eingefuehrt worden. Um diese Richtlinie zu ergaenzen, wurden Simulationsverfahren durch Geologie- und Kohlenqualitaetsmodelle verbessert und Mischverfahren verfeinert. Nach Beschreibung der Kohlequalitaet und Aschengehaltseigenschaften der Afsin-Elbistan Kohle erlaeutern die Verfasser ein geostatistisches Simulationsverfahren, um die

  5. Radon concentrations in coal mines of Baluchistan, Pakistan

    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. Coal mine gas monitoring system based on wireless sensor network

    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.

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

    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.

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

    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.

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

    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.

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

    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

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

    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)

  12. Morphogenetic classification of coal seam washouts in Donbass mines

    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.

  13. An Interactive Coal Mine Museum Visit: Prototyping the User Experience

    Haesen, Mieke; DE BOECK, Joan; Coninx, Karin; Raymaekers, Chris

    2009-01-01

    Interactive software applications are increasingly finding their way to cultural and tourist sites. During the development of a coal mine museum on the former mine site of Beringen (Province of Limburg, Belgium), we explored the possibilities of such interactive systems, suitable for the specific site and the intended target group. In particular, we concentrated on a mobile location-based educational game allowing young visitors to gain insight in the life of the miner, and on an interactive ...

  14. Sources of Productivity Decline in U.S. Coal Mining, 1972-1977

    William J. Kruvant; Carlisle E. Moody, Jr.; Patrick L. Valentine

    1982-01-01

    In this paper we estimate production functions for surface and underground coal mines. These production functions are then used to estimate individual mine productivity, to explain productivity differentials across mines, and to assess the importance of several assumed sources of productivity decline in this industry. For readers not familiar with coal-mining operations, we first present a summary discussion of coal-mining technology.

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

    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

  16. Fe and Mn removal from mining drainage using goaf filling materials obtained from coal mining process.

    Zhang, Liping; Chen, Aolei; Qu, Hongbin; Xu, Shouqiang; Zhang, Xue; He, Xuwen

    2015-01-01

    Coal gangue, sandy soil and clay (mass ratio 45:4:1) as goaf filling materials acquired from coal mining processes were applied to remove Fe and Mn effectively from mining drainage. The results of an adsorption kinetic study showed that the Fe adsorption equation was y=21.454y+8.4712, R2=0.9924 and the Mn adsorption equation was y=7.5409x+0.905, R2=0.9957. Meanwhile, the goaf filling materials had low desorption capacity (Fe 6.765 μg/g, Mn 1.52 μg/g) and desorption ratio (Fe 8.98%, Mn 11.04%). Experiments demonstrated that Fe and Mn from mining drainage could be removed stably at a flow rate of 1.2 L/min, Fe inlet concentration of less than 40 mg/L, Mn inlet concentration of less than 2 mg/L and neutral or alkaline conditions. During a procedure of continuous experiments, the effluent quality could meet the requirement of the 'Code for Engineering Design of Sewage Regeneration-GB503352-2002'. A real-application project using goaf filling materials to treat mining drainage in Shendong coal mine showed that the average cost per ton of mining drainage was about 0.55 RMB, which could bring about considerable economic benefit for coal mining enterprises. PMID:26606087

  17. Chemical and microbial sulphuric acid production from aerated mine lake sediment that was treated by different additions of NaOH (speech)

    We examined sediment from an open pit lake that was intensively used for coal mining during the first decade of 20th. century. Today, the site (Lake 111, Lusatia, Germany) is flooded and water has extreme chemistry: low pH values (2-3), high concentrations of sulphate (up to 2000 mg/l) and elevated concentrations of Fe, Zn and Mn. As a result, anoxic sediment accumulated elevated concentrations of these elements, especially high levels of reduced sulphur compounds. (orig.)

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

    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...

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

    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.

  20. Use of natural gamma radiation in the coal mining industry

    The technique of delineating coal seams by the use of natural gamma borehole logging sondes has been known for many years. The principle of the technique is that the gamma fluxes in shales are higher than in coals as the abundance of naturally occurring radionuclides is some twenty times greater in the former. This paper discusses other applications where the differeing natural gamma properties of coals and shales can be used. These are: (a) To distinguish between stone (shale) and run-of-mine coal on conveyor belts. A common situation underground is one in which stone from development headings and normal run-of-mine coal have to be batched along the same conveyor system. A natural gamma device capable of distinguishing between such batches of material, and thus allowing suitable mechanical separation, will be described. (b) To provide an accurate measurement of roof coal thickness by measuring the natural gamma flux penetrating the roof coal. To illustrate this examples will be given where this technique is used to provide automatic controlled steering of Long Wall Shearers and to provide manually assisted steering of In-seam Heading Machines

  1. 30 CFR 912.800 - General requirements for bonding of surface coal mining and reclamation operations.

    2010-07-01

    ... coal mining and reclamation operations. 912.800 Section 912.800 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE IDAHO § 912.800 General requirements for bonding of surface coal mining...

  2. 30 CFR 910.800 - General requirements for bonding of surface coal mining and reclamation operations.

    2010-07-01

    ... coal mining and reclamation operations. 910.800 Section 910.800 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE GEORGIA § 910.800 General requirements for bonding of surface coal mining...

  3. 30 CFR 922.800 - General requirements for bonding of surface coal mining and reclamation operations.

    2010-07-01

    ... coal mining and reclamation operations. 922.800 Section 922.800 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE MICHIGAN § 922.800 General requirements for bonding of surface coal mining...

  4. 30 CFR 937.800 - General requirements for bonding of surface coal mining and reclamation operations.

    2010-07-01

    ... coal mining and reclamation operations. 937.800 Section 937.800 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE OREGON § 937.800 General requirements for bonding of surface coal mining...

  5. 30 CFR 942.800 - Bond and insurance requirements for surface coal mining and reclamation operations.

    2010-07-01

    ... coal mining and reclamation operations. 942.800 Section 942.800 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE TENNESSEE § 942.800 Bond and insurance requirements for surface coal mining...

  6. Characteristics of coal-mine wastes for rehabilitation work

    This paper reports on many of the soil- element availability techniques commonly used in agronomy that are being applied to coal mine-rehabilitation sites because of the need for monitoring metal levels in both plants and mine soils. Diethylenetriamine pentaacetic acid (DTPA) was tested to determine its usefulness as a prediction of soil-plant relations. Eleven areas that varied greatly in edaphic, geological, geochemical, climatic conditions, and in mining and rehabilitation practices were sampled. Measured DTPA-extractable concentrations in cover soil, spoil, and A and C horizons of natural soil were compared to proposed maximum permissible levels of soil toxicity

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

    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

  8. Environmental issues in coal mining: a case study

    India, among the first five coal producing countries in the world, has a coal mining history of over 220 years. The environmental problems accumulated due to yester year and current mining and other industrial activities have led to the various environmental issues related to societal development, ecology, land, water regime and air quality. There has been no definite goal of industrial activities and environmental management. The environmental status in most coal mining complexes and around is far from satisfactory. It has been located that the environmental issues be defined with reference to the desired quality of life for all. Hence, the quality of life criteria be defined for various coal mining regions based on which the actions on the environmental issues be planned. The task of environmental management is mammoth and no single agency can be expected to take care of these tasks. The planning jobs may be assigned to specially formed multi-faceted teams and the final developmental scenario be detailed with due consent of the public. (author). 4 refs., 2 tabs

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

    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

  10. 78 FR 48591 - Refuge Alternatives for Underground Coal Mines

    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....

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

    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.

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

    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.

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

    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.

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

    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...

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

    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.

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

    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.

  17. High radon exposure in a Brazilian underground coal mine

    The main source of radiation exposure in most underground mining operations is radon and radon decay products. The situation of radon exposure in underground mining in Brazil is still unknown, since there has been no national regulation regarding this exposure. A preliminary radiological survey in non-uranium mines in Brazil indicated that an underground coal mine in the south of Brazil had high radon concentration and needed to be better evaluated. This paper intends to present an assessment of radon and radon decay product exposure in the underground environment of this coal mining industry and to estimate the annual exposure to the workers. As a product of this assessment, it was found that average radon concentrations at all sampling campaign and excavation sites were above the action level range for workplaces of 500-1500 Bq m-3 recommended by the International Commission on Radiological Protection-ICRP 65. The average effective dose estimated for the workers was almost 30 times higher than the world average dose for coal miners

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

    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.

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

    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.

  20. Pollution extents of organic substances from a coal gangue dump of Jiulong Coal Mine, China

    Sun, Y.Z.; Fan, J.S.; Qin, P.; Niu, H.Y. [Hebei University of Engineering, Handan (China)

    2009-02-15

    This paper addresses the distribution and occurrence of harmful organic substances in coal gangue dump from Jiulong Coal Mine and its influence on the environment. The samples were taken from the coal gangue dump and coal waste water stream and analyzed by organic geochemical methods. The results indicate that the coal gangues contain abundant harmful organic substances like polycyclic aromatic hydrocarbons. The TOC and sulfur contents of the samples are much higher than those of the background sample except Sample JL7. The contents of organic bulk parameters are relatively high. Ten carcinogenic PAHs were identified and these harmful organic substances have influenced the surrounding area. Along the waste water stream, organic substances pollute at least 1,800 m far from the coal gangue dump.

  1. Pollution extents of organic substances from a coal gangue dump of Jiulong Coal Mine, China.

    Sun, Y Z; Fan, J S; Qin, P; Niu, H Y

    2009-02-01

    This paper addresses the distribution and occurrence of harmful organic substances in coal gangue dump from Jiulong Coal Mine and its influence on the environment. The samples were taken from the coal gangue dump and coal waste water stream and analyzed by organic geochemical methods. The results indicate that the coal gangues contain abundant harmful organic substances like polycyclic aromatic hydrocarbons. The TOC and sulfur contents of the samples are much higher than those of the background sample except Sample JL7. The contents of organic bulk parameters are relatively high. Ten carcinogenic PAHs were identified and these harmful organic substances have influenced the surrounding area. Along the waste water stream, organic substances pollute at least 1,800 m far from the coal gangue dump. PMID:18288575

  2. Coal Mines, Abandoned - AML Inventory Sites 201601

    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...

  3. Coal Mines, Abandoned - AML Polygons Feature

    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...

  4. Coal Mines, Abandoned - AML Points Feature

    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...

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

    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.

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

    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)

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

    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....

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

    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.

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

    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.

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

    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 ...

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

    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.

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

    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)

  13. Construction of Safety Performance Management System for Coal Mine Enterprises in China

    You-jun WU

    2010-01-01

    The bad coal mine natural environment, safety investment deficiency, insufficiency safety performance management system are the main causes leading to the coal mining accident frequently nowadays, building-up safety performance management system is importance to coal enterprises safety work. This paper analyses the security status and the reasons of coal mine enterprises, the important role played by safety performance management system during the course of safe production, and the problems e...

  14. Why investors shy away from coal

    Why do investors shy away from coal? This may sound like a strange question given the change in ownership of many major coal companies in recent years, but the ongoing consolidation within the coal industry is quite different from any actual new investment in the industry. To begin to understand why, one must return to the early '70s, a time of low-cost, abundant energy. The price of oil was about $2-4/bbl until 1973. The price of natural gas was about 60 cents/M ft3, and coal was approximately $7/st. This, however, was before the first Organization of the Petroleum Exporting Countries (OPEC) shock. The price of coal declined throughout the 1980s, and continues its downward path in some markets. Many coal investments have not achieved their expected return, such as the case of a 1M st/yr mine in West Virginia, which was developed in the early '80s only to be put immediately on a care-and-maintenance basis, where it languished until it was sold in 1990. Other mines, such as the large open-pit mines in the Powder River Basin in Wyoming, never reached their targeted production rates. Some of these large mines had equipment that remained in crates for years, only later to be sold at a loss. The extent of losses on investments in coal mines is discussed

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

    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 ...

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

    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.

  17. Effect of Water Invasion on Outburst Predictive Index of Low Rank Coals in Dalong Mine

    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 outb...

  18. Environmental management and rehabilitation of the Nabarlek Uranium Mine

    Environmental protection was considered at Nabarlek since before mining commenced, continued during the mining life and culminated in its decommissioning and rehabilitation. Measures for the protection of the physical environment included: containment of all contaminated waters and treatment of tailing waters, return of the tailings direct to the open pit, backfilling of the open pit, landscaping and revegetation of disturbed area. ills

  19. Drainage from coal mines: Chemistry and environmental problems

    Much of the research on coal-mine drainage chemistry was conducted a decade ago, and now increased environmental awareness has brought about renewed interest in the findings. Consideration of the trace minerals and elements in coal points to the possible generation of acidic waters upon weathering, especially when pyrite is present. When pyrite weathers, it produces H+ and Fe3+ which catalyze the incongruent weathering of other carbonates and sulfides. In this weathering mechanism, catalysis by bacteria is important. Of the environmental problems in coal mine drainage, the mineral acidity of the water is the most serious. This is caused not only by the H+, but also by Mn4+, Fe3+, and Al3+ that are found or generated within the drainage. Case studies in Kentucky, Pennsylvania, Illinois, and Colorado show that the abundance and form of pyrite in the deposit and in the overburden determines the level of acidity and the concentration of heavy metal pollutants in the drainage. Recent trends in environmental enforcement that emphasize integrated stream water standards and biotoxicity assays point to the possibility that the concentrations of heavy metals in coal mine drainages may cause environmental concern

  20. Mineralogy and geochemistry of the Jurassic coals from the Gheshlagh mine, Eastern Alborz

    Gholam Hossein Shamanian; Fatemeh Hosseini Ashlaghi

    2015-01-01

    Introduction The Alborz structural zone in northern Iran is the host of a number of important coal deposits. The Gheshlagh coal mine is one of them, which is located 35 km southeast of Azadshahr. Coal bearing strata in the Gheshlagh mining district occur in the middle part of the Lower Jurassic Shemshak Formation which consists mainly of shales, siltstones and sandstones. The Geshlagh coals have a low sulfur content and a low ash yield. The ash content of coal and its geochemical character...

  1. Residential damage in an area of underground coal mining

    In order to estimate the potential for future subsidence-related residential damage, a statistical analysis of past residential damage in the Boulder-Weld, Colorado, coal field was performed. The objectives of this study were to assess the difference in damage severity and frequency between undermined and non-undermined areas, and to determine, where applicable, which mining factors significantly influence the severity and frequency of residential damage. The results of this study suggest that undermined homes have almost three times the risk of having some type of structural damage than do non-undermined homes. The study also indicated that both geologic factors, such as the ratio of sandstone/claystone in the overburden, and mining factors, such as the mining feature (room, pillar, entry, etc.), can significantly affect the severity of overlying residential damage. However, the results of this study are dependent on local conditions and should not be applied elsewhere unless the geologic, mining, and residential conditions are similar

  2. Effect of mining and utilizing bone coal on environment

    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.

  3. Coal Mine Roadway Stability in Soft Rock: A Case Study

    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

  4. Injection of alkaline ashes into underground coal mines for acid mine drainage abatement

    The injection of alkaline coal combustion waste products into abandoned underground coal mines for acid mine drainage (AMD) abatement has obvious conceptual appeal. This paper summarizes the findings of the baseline hydrogeologic and water quality evaluations at two sites--one in West Virginia and one in Maryland--where field demonstrations of the technique are being pursued in cooperative efforts among State and Federal agencies and/or private companies. The West Virginia site produces severe AMD from three to seven AMD sources that are spaced over about a 1.2 km stretch of the down-dip side of the mine workings. By completely filling the most problematic portion of the mine workings with coal combustion ashes, the State expects that the costs and problems associated with AMD treatment will be greatly reduced. At the Maryland site, it is expected that the AMD from a relatively small target mine will be eliminated completely by filling the entire mine void with a grout composed of a mixture of fly ash, fluidized-bed combustion ash, and flue gas desulfurization sludge. This project will also demonstrate the potential cost-effectiveness of the technique at other sites, both for the purpose of AMD remediation and control of land subsidence

  5. Mining a coal seam below a heating goaf with a force auxiliary ventilation system at Longhua underground coal mine, China

    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.

  6. Study on land use changes of the coal mining area based on TM image

    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.

  7. Noise problems in coal mining complex- a case discussion

    Noise monitoring study was conducted at Moonidih mining complex of Jharia coal-field. The study included monitoring and analysis of ambient as well as workplace noise levels. An attempt has been made to critically analyse the noise situation through octave band analysis, thereby identifying alarming noise frequencies for each noise generating equipment having Leq level more than 90 dBA. A noise model has also been developed to draw noise contours of the entire mining complex. Based on these studies, suitable control measures have been suggested. (author). 6 refs., 3 figs

  8. Characterization of deep ground geothermal field in Jiahe Coal Mine

    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 ).

  9. Coal mining situation in the Federal Republic of Germany. 1st half of 2015

    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.

  10. Environmental impact of mining in the Czech part of the Upper Silesian Coal Basin

    Šňupárek, Richard; Martinec, Petr; Schejbalová, Božena

    Sarajevo: Svjetlost, 2004 - (Osmanagić, M.), s. 247-258 ISBN 9958-10-653-1. [European Conference on Raw Building Materials and Coal : New Perspectives. Sarajevo (BA), 20.05.2004-21.05.2004] Institutional research plan: CEZ:AV0Z3086906 Keywords : Ostrava-Karviná coal field * environmental impact Subject RIV: DH - Mining, incl. Coal Mining

  11. Enhanced power plant performance through coal feed modeling, TRANSALTA Utilities Corporation Highvale Mine, Alberta, Canada

    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.

  12. 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

    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.

  13. Unionism and productivity in West Virginia coal mining

    Boal, W.M.

    1985-01-01

    This dissertation assembled and analyzed a panel-data set of West Virginia coal mines during the 1930's. This state and period is ideal for a statistical investigation of the unionism effect because of the union's rapid change in fortune. After organizing half the state during World War I, the union lost all its contracts in the mid-1920's. Hence many mines can be observed alternatively under union and nonunion operation. Production functions were estimated for 83 mines in the early 1920's, with every mine in the sample represented under both union and nonunion operation. A Cobb-Douglas production function was statistically rejected in favor of the translog, but for both specifications joint tests indicated that all input coefficients (not just the intercept) changed with unionism. Simulation suggested a negative effect of unionism on output at small mines but little effect on output at large mechanized mines. The effect at large unmechanized mines was shown to be positive. These results seem reasonable in light of comments by contemporary observers of the industry.

  14. 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

    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.

  15. Forecast and Prevention of Coal and Gas Outbursts in the Case of Application of a New Mining Method - Drilling of a Coal Pillar

    Vlastimil Hudeček; Milan Stoniš

    2010-01-01

    Coal and gas outbursts are one of risk factors accompanying the mining of coal in low seams in the Ostrava-Karviná Coalfield.At the use of the method of longwall mining, all coal reserves have not been mined out owing to tectonic faults. For mining outthe residual reserves, the application of a new mining method - drilling of a coal pillar was proposed.The method of mining of a coal seam utilizing long large diameter boreholes is verified in the Paskov Mine (company OKD, JSC –Czech Republic) ...

  16. Mercury distribution in coals influenced by magmatic intrusions, and surface waters from the Huaibei Coal Mining District, Anhui, China

    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

  17. 30 CFR 922.762 - Criteria for designating areas as unsuitable for surface coal mining operations.

    2010-07-01

    ... for surface coal mining operations. 922.762 Section 922.762 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE MICHIGAN § 922.762 Criteria for designating areas as unsuitable for surface coal...

  18. 30 CFR 933.800 - General requirements for bonding of surface coal mining and reclamation operations.

    2010-07-01

    ... coal mining and reclamation operations. 933.800 Section 933.800 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE NORTH CAROLINA § 933.800 General requirements for bonding of surface coal...

  19. 30 CFR 939.800 - General requirements for bonding of surface coal mining and reclamation operations.

    2010-07-01

    ... coal mining and reclamation operations. 939.800 Section 939.800 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE RHODE ISLAND § 939.800 General requirements for bonding of surface coal...

  20. 30 CFR 921.800 - General requirements for bonding of surface coal mining and reclamation operations.

    2010-07-01

    ... coal mining and reclamation operations. 921.800 Section 921.800 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE MASSACHUSETTS § 921.800 General requirements for bonding of surface coal...

  1. 30 CFR 912.762 - Criteria for designating areas as unsuitable for surface coal mining operations.

    2010-07-01

    ... for surface coal mining operations. 912.762 Section 912.762 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE IDAHO § 912.762 Criteria for designating areas as unsuitable for surface coal...

  2. 30 CFR 937.762 - Criteria for designating areas as unsuitable for surface coal mining operations.

    2010-07-01

    ... for surface coal mining operations. 937.762 Section 937.762 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE OREGON § 937.762 Criteria for designating areas as unsuitable for surface coal...

  3. 30 CFR 941.800 - General requirements for bonding of surface coal mining and reclamation operations.

    2010-07-01

    ... coal mining and reclamation operations. 941.800 Section 941.800 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE SOUTH DAKOTA § 941.800 General requirements for bonding of surface coal...

  4. 30 CFR 910.762 - Criteria for designating areas as unsuitable for surface coal mining operations.

    2010-07-01

    ... for surface coal mining operations. 910.762 Section 910.762 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE GEORGIA § 910.762 Criteria for designating areas as unsuitable for surface coal...

  5. 30 CFR 903.762 - Criteria for designating areas as unsuitable for surface coal mining operations.

    2010-07-01

    ... for surface coal mining operations. 903.762 Section 903.762 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE ARIZONA § 903.762 Criteria for designating areas as unsuitable for surface coal...

  6. Long-hole destress blasting for rockburst control during deep underground coal mining

    Koníček, Petr; Souček, Kamil; Staš, Lubomír; Singh, R.

    -, č. 61 (2013), s. 141-153. ISSN 1365-1609 R&D Projects: GA MŠk ED2.1.00/03.0082 Institutional support: RVO:68145535 Keywords : Ostrava - Karvina Coal basin * longwall mining * rockbursts * destress blasting Subject RIV: DH - Mining, incl. Coal Mining Impact factor: 1.424, year: 2013 http://www.sciencedirect.com/science/article/pii/S1365160913000348

  7. Damage to underground coal mines caused by surface blasting

    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

  8. Mechanism of Reinforcement on Inwall of Coal Mine Shaft Wall

    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.

  9. Mechanism of Electronic Charging of Coal Mine Dust

    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.

  10. Virginia big-eared bats (Corynorhinus townsendii virginianus) roosting in abandoned coal mines in West Virginia

    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.

  11. Present state and perspectives of black coal mining development in Poland until the year 2000

    Jaskowski, A.

    1982-01-01

    This paper evaluates black coal reserves in Poland in three basins. Upper Silesia, Lower Silesia and the Lublin basin. Minable coal reserves in the Upper and Lower Silesian basins up to a depth of 1000 m in operating coal mines and mines being constructed amount to 28,000 megatons (Mt). Minable coal reserves at a depth from 1000 to 1500 m in the two basins amount to 15,000 Mt. Minable coal reserves in new mining areas amount to 30,000 Mt (of this 21,000 Mt are reserves up to a depth not exceeding 1000 m). Minable coal reserves of the Lublin basin amount to 7,000 Mt. Total minable black coal reserves amount to 80,000 Mt. Coal losses in Polish coal mining are high. For 1 t of mined coal 2.5 t are lost (considering only minable reserves). The drastic decrease in coal output in 1981 is analyzed. The decrease was caused by reduction of the average working time of a miner from 356 days per year to 255 days per year. According to the most conservative forecast coal output will increase to 200 Mt in 1995 and to 210 Mt in the year 2000. According to the most optimistic forecast coal output will increase to 200 Mt in 1990 and to 240 Mt in the year 2000. Investment in black coal mines in Poland is also discussed.

  12. Ventilation eddy zones at a model coal mine working face

    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.

  13. Mechanism of Reinforcement on Inwall of Coal Mine Shaft Wall

    Jinlong Liu; Luwang Chen; Jili Wang

    2013-01-01

    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...

  14. Moving up down in the mine: Sex segregation in underground coal mining

    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

  15. Remediation of coal mining wastewaters using chitosan microspheres.

    Geremias, R; Pedrosa, R C; Benassi, J C; Fávere, V T; Stolberg, J; Menezes, C T B; Laranjeira, M C M

    2003-12-01

    This study aimed to evaluate the potential use of chitosan and chitosan/poly(vinylalcohol) microspheres incorporating with 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 colleted 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. PMID:14977147

  16. Remediation of coal mining wastewaters using chitosan microspheres

    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.

  17. The role of spatial variability in coal seam parameters on gas outburst behaviour during coal mining

    Wold, M.B.; Connell, L.D.; Choi, S.K. (CSIRO Petroleum, Ian Wark Laboratory, Bayview Avenue, Clayton, Victoria, 3168 Australia)

    2008-06-13

    Gas outburst is recognized as a potentially fatal hazard to be managed during the mining of gassy coal seams. Gas outbursts in Australian coal mines have been associated with the presence of geological structures in the coal and surrounding rocks, having a range of spatial scales from millimetres to metres. The contributing mechanisms are influenced by coal gas reservoir variables including gas composition, fluid pressure, desorption pressure and rate, porosity, intrinsic permeability and relative permeability. They are also influenced by geomechanical variables such as strength, in situ stress and mining-induced stress. The work described here concerns the influence of variability of permeability and strength on outburst behaviour. Key coal properties are characterised for a field site in an operational underground coal mine and then used in a series of hypothetical simulations of outburst initiation. At the field site an array of horizontal holes was cored in-seam. Well tests for permeability and stress were performed in the holes and recovered core was tested in the laboratory for permeability, strength and sorption properties. For permeability and strength sufficient numbers of measurements were obtained to describe these properties statistically assuming that the measurements are uncorrelated spatially. Analysis of the cumulative probability distributions of the field and laboratory permeability data shows a strong size effect that cannot be linearly up-scaled. Using Monte Carlo techniques, these statistical descriptions are used to generate realisations of property values across the model grid used in the simulation analyses. The stochastic model approach demonstrates that the variability of the permeability and strength fields can lead to both outburst and non-outburst outcomes from the same measured input data, depending on the corresponding spatial distribution of permeability and strength at the face. These results suggest the potential application of

  18. Influences of coal mining water irrigation on the maize losses in the Xingdong Mine area, China.

    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

  19. Tannery and coal mining waste disposal on soil

    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.

  20. Deformation Failure Characteristics of Coal Body and Mining Induced Stress Evolution Law

    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.

  1. Forecast of long term coal supply and mining conditions: Model documentation and results

    1980-01-01

    A coal industry model was developed to support the Jet Propulsion Laboratory in its investigation of advanced underground coal extraction systems. The model documentation includes the programming for the coal mining cost models and an accompanying users' manual, and a guide to reading model output. The methodology used in assembling the transportation, demand, and coal reserve components of the model are also described. Results presented for 1986 and 2000, include projections of coal production patterns and marginal prices, differentiated by coal sulfur content.

  2. Brine disposal process for Morcinek coal mine

    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.

  3. Respirable quartz hazard associated with coal mine roof bolter dust

    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.

  4. Research on water pollution induced by coal mining

    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.

  5. Fiber Bragg grating (FBG) sensors used in coal mines

    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.

  6. Yampa coal field combined leased areas and mined-out areas, Colorado Plateau (yam*leasg)

    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...

  7. Methods of determining methane emission in coal mines of Great Britain and India

    Sobala, J.

    1980-10-01

    Methane prediction methods used in Great Britain are discussed in the light of methane prediction methods used in Poland and other countries. The following methods are discussed: Stuffken method (Holland), Schulz method, Fluegge method, Winter method (FRG), Gunther method (France), Lidin method (USSR), Barbara Experimental Coal Mine method (Poland) and MRDE method (UK). Factors taken into account in the 8 methods are evaluated: gas content in adjacent rock and coal layers, thickness of adjacent coal seams, distance to adjacent coal seams, length of a working, intensity of gas drainage, angle of inclination of mined coal seam, thickness of mined seam, method of roof control of the mined seam, depth, advance rate, and gas emission from hauled coal. It is noted that methods of classifying coal seams in India taking into account methane hazard are similar to the system used in Poland up to 1970 (three classes of methane hazard). Methods of coal sampling used in India are described. (6 refs.)

  8. The spatiotempora variations rules of Songzao coal mining subsidence based on numerical simulation

    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...

  9. Effect of increasing mining rate on longwall coal mining - Western donbass case study

    Sdvyzhkova, Olena; Patyńska, Renata

    2016-03-01

    This paper presents the problems associated with the rapid change of the rock stress-strain state in terms of increasing the rate of coal mining. Parameters of the roof collapse are determined depending on the rate of a longwall advancing under conditions of poor rocks. Statistical data are processed to obtain a general trend concerning the mining rate impact on the roof collapse. The statistical strength theory is applied to explain the increase in mined-out space and the size of hanging roof behind a coal face. Numerical simulation is carried out to determine a critical size of mined-out space that provokes a roof collapse. The area of yielded rocks is outlined using the criterion developed taking into account the rate of longwall advancing. A general regularity is obtained to determine the roof collapse parameters. The developed technics gives a possibility to predict the moment of general roof collapse at the initial stage of longwalling to prevent the negative effect of the rapid stress redistribution provoking joints propagation and intensive gas release. The estimation of the rock stress-strain state considering the rate of mining operations can be useful for tasks related to a new technology implementation. The statistical strength theory and failure criterion applied together provides adequate planning of mining activities and the assessment of natural hazards.

  10. Injection of FGD Grout to Abate Acid Mine Drainage in Underground Coal Mines

    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

  11. Study on the detection of geological structure in coal mine using radon-measuring method

    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

  12. "Productivity Change and Mine Dynamics: The Coal Industry in Japan during World War II"

    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 ...

  13. Impact of Coal Mining on Self-Rated Health among Appalachian Residents

    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.

  14. CHINA'S RECENT DEVELOPMENT IN COAL MINING,PROCESSING AND UTILIZATION

    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.

  15. Land reclamation in the refuse dump of open coal mines and its following ecology principle

    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.

  16. Simulation Study and Probe on UWB Wireless Communication in Underground Coal Mine

    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.

  17. Destress Blasting in Coal Mining – State-of-the-Art Review

    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...

  18. 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

    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.

  19. Coal seam methane distribution and its significance in Pingdingshan mining area

    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.

  20. Decision support system of coal mine planning using system dynamics model

    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,...

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

    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 ...

  2. Statistical Analysis of Sino-U.S. Coal Mining Industry Accidents

    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...

  3. Environmental management in hard coal mine group in the Upper Silesian Coal Basin, Poland

    Mining activity and the other branches of heavy industry existing in the USCB for over 2 centuries have made large unfavourable changes of environment. Prevention of its further degradation needs the solution for the following main problems: utilisation of high saline mine drainage water (a problem unique in the world scale), treatment of solid wastes, land reclamation (mainly treatment of areas of ground subsiding). Market economy introduced 10 years ago and the necessity that all fields of life conform to the requirements of the European Union force the process of deep restructurisation of mining industry. One of the conditions for success of restructuring is the solution of ecological problems. The possibility of environmental management system implementation according to the ISO 14000 standard in the coal mine group condition was discussed. The chances and presumed results of these activities were presented in this paper. 6 refs

  4. Structural and stress analysis of mining practice in the Upper Silesian Coal Basin

    Waclawik, Petr; Ptáček, Jiří; Grygar, R.

    2013-01-01

    Roč. 10, č. 2 (2013), s. 255-265. ISSN 1214-9705 Institutional support: RVO:68145535 Keywords : horizontal stress * structural analysis * mine roadway stability * coal mining * rock burst Subject RIV: DH - Mining, incl. Coal Mining Impact factor: 0.667, year: 2013 http://www.irsm.cas.cz/materialy/acta_content/2013_02/acta_170_15_Waclawik_255-265.pdf

  5. The effect of China's globalisation on the South African coal mining equipment (OEM) industry / Ramona Naidoo

    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 ...

  6. Spontaneous combustion of coal and its early detection on OKR mines

    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...

  7. Ecological impact produced by hard coal mining in Petrosani coal basin and pollution reduction at Jiu River

    Economical development of the coal basin Petrosani based on exploitation and processing of hard coal unit now a dynamic character without taking into account the environmental aspects. The major environmental problem induced, consists in the pollution of Jiu river as a consequence of the effluent ejected in his waters. The present paper highlights some aspects of environmental impact induced by hard coal mining in coal basin Petrosani

  8. 30 CFR 941.762 - Criteria for designating areas as unsuitable for surface coal mining operations.

    2010-07-01

    ... for surface coal mining operations. 941.762 Section 941.762 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS... mining operations. Part 762 of this chapter, Criteria for Designating Areas Unsuitable for Surface...

  9. 30 CFR 941.761 - Areas designated unsuitable for surface coal mining by act of Congress.

    2010-07-01

    ... mining by act of Congress. 941.761 Section 941.761 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE SOUTH DAKOTA § 941.761 Areas designated unsuitable for surface coal mining by act...

  10. 30 CFR 939.762 - Criteria for designating areas as unsuitable for surface coal mining operations.

    2010-07-01

    ... for surface coal mining operations. 939.762 Section 939.762 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS... mining operations. Part 762 of this chapter, Criteria for Designating Areas Unsuitable for Surface...

  11. 30 CFR 921.761 - Areas designated unsuitable for surface coal mining by Act of Congress.

    2010-07-01

    ... mining by Act of Congress. 921.761 Section 921.761 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE MASSACHUSETTS § 921.761 Areas designated unsuitable for surface coal mining by Act...

  12. 30 CFR 922.761 - Areas designated unsuitable for surface coal mining by act of Congress.

    2010-07-01

    ... mining by act of Congress. 922.761 Section 922.761 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE MICHIGAN § 922.761 Areas designated unsuitable for surface coal mining by act...

  13. 30 CFR 905.761 - Areas designated unsuitable for surface coal mining by act of Congress.

    2010-07-01

    ... mining by act of Congress. 905.761 Section 905.761 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE CALIFORNIA § 905.761 Areas designated unsuitable for surface coal mining by act...

  14. 30 CFR 933.761 - Areas designated unsuitable for surface coal mining by Act of Congress.

    2010-07-01

    ... mining by Act of Congress. 933.761 Section 933.761 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE NORTH CAROLINA § 933.761 Areas designated unsuitable for surface coal mining by Act...

  15. 30 CFR 921.762 - Criteria for designating areas as unsuitable for surface coal mining operations.

    2010-07-01

    ... for surface coal mining operations. 921.762 Section 921.762 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS... mining operations. Part 762 of this chapter, Criteria for Designating Areas Unsuitable for Surface...

  16. 30 CFR 942.761 - Areas designated unsuitable for surface coal mining by act of Congress.

    2010-07-01

    ... mining by act of Congress. 942.761 Section 942.761 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE TENNESSEE § 942.761 Areas designated unsuitable for surface coal mining by act...

  17. 30 CFR 903.761 - Areas designated unsuitable for surface coal mining by act of Congress.

    2010-07-01

    ... mining by act of Congress. 903.761 Section 903.761 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE ARIZONA § 903.761 Areas designated unsuitable for surface coal mining by act...

  18. 30 CFR 912.761 - Areas designated unsuitable for surface coal mining by act of Congress.

    2010-07-01

    ... mining by act of Congress. 912.761 Section 912.761 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE IDAHO § 912.761 Areas designated unsuitable for surface coal mining by act of...

  19. 30 CFR 942.762 - Criteria for designating areas as unsuitable for surface coal mining operations.

    2010-07-01

    ... for surface coal mining operations. 942.762 Section 942.762 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS... mining operations. (a) Part 762 of this chapter, Criteria for Designating Areas as Unsuitable for...

  20. 30 CFR 947.762 - Criteria for designating areas as unsuitable for surface coal mining operations.

    2010-07-01

    ... for surface coal mining operations. 947.762 Section 947.762 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS... mining operations. Part 762 of this chapter, Criteria for Designating Areas Unsuitable for Surface...