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1

The physical and methodical bases of the calculation of transferring hazardous substances from open pit coal mines  

Energy Technology Data Exchange (ETDEWEB)

Current conditions of open pit coal mines are examined with an attitude toward their interaction with the atmosphere, to characteristics of gaseous dust emission sources, and in addition to atmospheric factors which are responsible for the behavior of suspended substances.

Akhmetov, M.S.; Ashikhmin, G.B.; Naumov, V.D.; Putilov, V.G.

1980-01-01

2

Utilization of residual reserves of coal strata outcrops by open-pit mining with a subsequent disposal of industrial waste  

Directory of Open Access Journals (Sweden)

Full Text Available In the paper the author deals with the possibilities of open-pit mining of residual reserves of coal seam outcrops. Following the coal extraction, certified regional industrial waste can be disposed in the mined-out area, thus reducing the environmental burden of the region.

Kryl Václav

1998-01-01

3

Land reclamation policy after open pit coal mining in the North Bohemian brown coal mining district  

International Nuclear Information System (INIS)

[en] An overview is presented of the results of land reclamation activities in the North Bohemian brown coal mining district, and the principles are outlined of the long-term plan for ecosystem restoration in that region. (J.B.)

1993-01-01

4

Air quality impact assessment of multiple open pit coal mines in northern Colombia.  

UK PubMed Central (United Kingdom)

The coal mining region in northern Colombia is one of the largest open pit mining regions of the world. In 2009, there were 8 mining companies in operation with an approximate coal production of ?70 Mtons/year. Since 2007, the Colombian air quality monitoring network has reported readings that exceed the daily and annual air quality standards for total suspended particulate (TSP) matter and particles with an equivalent aerodynamic diameter smaller than 10 ?m (PM??) in nearby villages. This paper describes work carried out in order to establish an appropriate clean air program for this region, based on the Colombian national environmental authority requirement for modeling of TSP and PM(10) dispersion. A TSP and PM?? emission inventory was initially developed, and topographic and meteorological information for the region was collected and analyzed. Using this information, the dispersion of TSP was modeled in ISC3 and AERMOD using meteorological data collected by 3 local stations during 2008 and 2009. The results obtained were compared to actual values measured by the air quality monitoring network. High correlation coefficients (>0.73) were obtained, indicating that the models accurately described the main factors affecting particle dispersion in the region. The model was then used to forecast concentrations of particulate matter for 2010. Based on results from the model, areas within the modeling region were identified as highly, fairly, moderately and marginally polluted according to local regulations. Additionally, the contribution particulate matter to the pollution at each village was estimated. Using these predicted values, the Colombian environmental authority imposed new decontamination measures on the mining companies operating in the region. These measures included the relocation of three villages financed by the mine companies based on forecasted pollution levels.

Huertas JI; Huertas ME; Izquierdo S; González ED

2012-01-01

5

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

Energy Technology Data Exchange (ETDEWEB)

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)

NONE

1995-12-31

6

The assessment and management of coal recovery in open pit mines  

Energy Technology Data Exchange (ETDEWEB)

This paper describes the results of research projects undertaken by the Julius Kruttschnitt Mineral Research Centre relating the overall mining and washing performance reported by mines to the detailed transformations occurring at each stage of the mining and processing of coal. The work has identified that few mines in Australia realistically report or schedule mining recovery and dilution and that the use of global reporting and scheduling parameters obscures opportunities to improve the overall recovery of coal from its in situ state to a saleable product. Examples are presented to demonstrate how the overall recovery of coal can be increased from most operations with little capital expenditure or change in operating cost. The economic impact of increasing sales revenue in this way dwarfs most other initiatives when `optimising` mine performance. 3 refs., 7 figs., 5 tabs.

Scott, A. [University of Queensland, Brisbane, Qld. (Australia). Julius Kruttschnitt Mineral Research Centre

1998-12-31

7

Development of broadleaved woodland on colliery and open pit coal mines in the United Kingdom  

International Nuclear Information System (INIS)

Broadleaved woodland is an important land use and vegetation type in the United Kingdom (UK), and potentially the most effective landscape and restoration treatment for colliery waste tips and open pit coal sites. A field-based national survey of collieries in England and Wales in 1986 and 1987 showed that establishment was satisfactory in only half of the schemes, and growth was deemed satisfactory in less than one-fifth. There are standard forestry practices whereby stock quality can be assured, and herbaceous vegetation controlled or eliminated by the use of herbicides. During the restoration of the site, depending on choice of species, adequate soil water can be provided by the selection of appropriate soil types and thicknesses, and adoption of appropriate soil handling and decompaction practices. The low affinity of the plantations with local and regional types was partly due to the planting of non-native species and partly due to the failure to match species with site and soil characteristics. There is no reason why woodlands of a local and regional character cannot be established by planting the associated species. A matrix of fast-growing tree and/or shrub species should be used to promote early woodland development. These would be removed during normal management which is essential for the ultimate success of the woodland. Planting schemes should also incorporate woodland structural elements and understory and ground flora species. Provided that these measures are fully implemented, significant improvements in establishment, growth, and woodland development on restored sites should be achieved.

1994-01-01

8

Standardized emissions inventory methodology for open-pit mining areas.  

UK PubMed Central (United Kingdom)

INTRODUCTION: There is still interest in a unified methodology to quantify the mass of particulate material emitted into the atmosphere by activities inherent to open-pit mining. For the case of total suspended particles (TSP), the current practice is to estimate such emissions by developing inventories based on the emission factors recommended by the USEPA for this purpose. However, there are disputes over the specific emission factors that must be used for each activity and the applicability of such factors to cases quite different to the ones under which they were obtained. There is also a need for particulate matter with an aerodynamic diameter less than 10 ?m (PM(10)) emission inventories and for metrics to evaluate the emission control programs implemented by open-pit mines. STANDARDIZED EMISSION INVENTORY METHODOLOGY: To address these needs, work was carried out to establish a standardized TSP and PM(10) emission inventory methodology for open-pit mining areas. The proposed methodology was applied to seven of the eight mining companies operating in the northern part of Colombia, home to the one of the world's largest open-pit coal mining operations (?70 Mt/year). RESULTS: The results obtained show that transport on unpaved roads is the mining activity that generates most of the emissions and that the total emissions may be reduced up to 72% by spraying water on the unpaved roads. Performance metrics were defined for the emission control programs implemented by mining companies. It was found that coal open-pit mines are emitting 0.726 and 0.180 kg of TSP and PM(10), respectively, per ton of coal produced. It was also found that these mines are using on average 1.148 m(2) of land per ton of coal produced per year.

Huertas JI; Camacho DA; Huertas ME

2011-08-01

9

Examples of open pit mining instability  

Energy Technology Data Exchange (ETDEWEB)

Geotechnical technology for surface mining has become increasingly sophisticated as lower grade ore deposits are being developed. With larger and deeper open pits, more detailed and accurate investigation has become necessary during the past decade. Many variables influence successful open pit operations. These include ore grade, metal price, development costs, construction costs, mine design, stability and operating costs. With the great increase in the size of open pits to depths over 600 - 800 meters, the determination of pit slope angle and control of wall stability has a major influence on project economics. This paper briefly discusses preliminary considerations for pit slopes from a geotechnical standpoint to optimize economics and safety including structural geology, groundwater, blasting, pit geometry and in-situ stress. Recent developments in stability engineering are described and to illustrate a wide range of stability problems, typical examples are briefly reviewed. 12 refs., 11 figs.

Brawner, C.O.

1987-01-01

10

An extended drain heavy duty engine oil field trial at an open pit coal mine  

Energy Technology Data Exchange (ETDEWEB)

The extended drain field trial of an SAE 15W40 Heavy Duty Diesel Oil (HDEO) used in surface coal mining equipment is described. The trial shows that, in some diesel engines, oils perform up to 1000 operator hours. Such extended drain intervals require highly formulated oils, suitable filtration, an oil analysis programme, and a proactive maintenance department. The following parameters need to be tracked: viscosity at 100{degree}C, iron wear levels, TAN/TBN levels, and amount of solids. Test results and data covering engines from three Original Equipment Manufacturers are presented. 5 refs., 6 figs.

Rawn, W.J.; Morrison, J.D. [Cardinal River Coals, Hinton, AB (Canada)

1999-07-01

11

Production begins at Pecket, Chile's first large scale, open-pit coal operation and world's southernmost mine  

Energy Technology Data Exchange (ETDEWEB)

This article describes Chile's first large-scale, open-pit subbituminous steam coal mine and mechanized bulk loading marine terminal. The Pecket coal project will save money in energy production and oil imports. The mine is a classic truck and shovel operation and it will be possible to dump the overburden into mined out sections of the pit, although initially it will be used to form windbreaks and a pad in the coal stockpile area. Crushed coal is carried by conveyor to the radial ship loader. Dust accumulation and excessive coal drying is avoided by crushing only when a ship is docked. The mine was begun after feasibility studies, market considerations and characterization of deposits. Investment and financing organizations are listed. The Pecket operation should be just the beginning of development of coal reserves in the Magellan area. 3 figs.

O' Neil, T.

1988-01-01

12

Clearing rain from open-pit mine  

Energy Technology Data Exchange (ETDEWEB)

Because of the large yearly rainfall in Panguna, Bougainveille Island, North Solomons Province, Papua New Guinea, unique problems have developed for the open-pit copper mine operated there by Bougainville Copper Limited. The large size of ths pit intercepts numerous streams and drainways which enter the area. The article discusses various methods to reduce and eliminate this water. Methods discussed are channels, pumping and tunneling.

1984-05-01

13

Model studies of an open-pit mine bottom loaded by artesian water pressure  

Energy Technology Data Exchange (ETDEWEB)

Experimental modelling methods are used for prediction of deformation and groundwater outflows at the bottom of an open-pit mine during the excavation of brown coal. Thermal gasbearing artesian water exerts an uplift pressure on the impervious subsoil of the coal seam and threatens the stability of the mine bottom. The break-through of the mine bottom would seriously affect the groundwater regime and may endanger mining activities. The mining is carried out within the protection zones of the Carlsbad spa springs. Results of model studies are used to determine protective hydrogeological and mining measures for providing the maximum protection for the open-pit mine and the spa springs. (orig.)

Trckova, J. [Inst. of Rock Structure and Mechanics AS CR, Prague (Czech Republic)

1998-09-01

14

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

Science.gov (United States)

|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…

British Columbia Dept. of Education, Victoria.

15

Progressive methods for open pit mining of minerals and preparing them for processing. Progressivnyye metody otkrytoy dobychi poleznykh iskopayemykh i podgotovki ikh k pererabotke  

Energy Technology Data Exchange (ETDEWEB)

The issues of the effective mining of ore, coal and nonore deposits using the open pit method in Central Asia are examined, especially progressive methods, technology and the parameters of extraction of minerals in open pits, the development of open mining operations, increasing the quality of the extracted of minerals and concentrates and preparing them for processing.

Zhukov, N.A.

1983-01-01

16

Environmental impact assessment of open pit mining in Iran  

Science.gov (United States)

Mining is widely regarded as having adverse effects on environment of both magnitude and diversity. Some of these effects include erosion, formation of sinkhole, biodiversity loss and contamination of groundwater by chemical from the mining process in general and open-pit mining in particular. As such, a repeatable process to evaluate these effects primarily aims to diminish them. This paper applies Folchi method to evaluate the impact of open-pit mining in four Iranian mines that lacked previous geo-environmental assessment. Having key geologic resources, these mines are: Mouteh gold mine, Gol-e-Gohar and Chogart iron mines, and Sarcheshmeh copper mine. The environmental components can be defined as public health and safety, social relationships, air and water quality, flora and fauna hence, various impacting factors from the mining activities were estimated for each environmental component. For this purpose, each impacting factor was first given a magnitude, based solely on the range of possible scenarios. Thereafter, a matrix of weighted factors was derived to systematically quantify and normalize the effects of each impacting factor. The overall impact upon each individual environmental component was then calculated by summing the weighted rates. Here, Folchi method was applied to evaluate those environmental conditions. Based on the acquired results, the present paper finally concludes that amongst four case histories in Iran, Sarcheshmeh copper mine significantly affects the environment, with critical level of air pollution there.

Monjezi, M.; Shahriar, K.; Dehghani, H.; Samimi Namin, F.

2009-07-01

17

Open-pit coal-mining effects on rice paddy soil composition and metal bioavailability to Oryza sativa L. plants in Cam Pha, northeastern Vietnam.  

UK PubMed Central (United Kingdom)

This study quantified Cd, Pb, and Cu content, and the soil-plant transfer factors of these elements in rice paddies within Cam Pha, Quang Ninh province, northeastern Vietnam. The rice paddies are located at a distance of 2 km from the large Coc Sau open-pit coal mine. Electron microprobe analysis combined with backscattered electron imaging and energy-dispersive spectroscopy revealed a relatively high proportion of carbon particles rimmed by an iron sulfide mineral (probably pyrite) in the quartz-clay matrix of rice paddy soils at 20-30 cm depth. Bulk chemical analysis of these soils revealed the presence of Cd, Cu, and Pb at concentrations of 0.146?±?0.004, 23.3?±?0.1, and 23.5?±?0.1 mg/kg which exceeded calculated background concentrations of 0.006?±?0.004, 1.9?±?0.5, and 2.4?±?1.5 mg/kg respectively at one of the sites. Metals and metalloids in Cam Pha rice paddy soils, including As, Cd, Cr, Cu, Hg, Mn, Ni, Pb, and Zn, were found in concentrations ranging from 0.2?±?0.1 to 140?±?3 mg/kg, which were in close agreement with toxic metal contents in mine tailings and Coc Sau coal samples, suggesting mining operations as a major cause of paddy soil contamination. Native and model Oryza sativa L. rice plants were grown in the laboratory in a growth medium to which up to 1.5 mg/kg of paddy soil from Cam Pha was added to investigate the effects on plant growth. A decrease in growth by up to 60 % with respect to a control sample was found for model plants, whereas a decrease of only 10 % was observed for native (Nep cai hoa vang variety) rice plants. This result suggests an adaptation of native Cam Pha rice plants to toxic metals in the agricultural lands. The Cd, Cu, and Pb contents of the native rice plants from Cam Pha paddies exceeded permitted levels in foods. Cadmium and Pb were highest in the rice plant roots with concentrations of 0.84?±?0.02 and 7.7?±?0.3 mg/kg, suggesting an intake of these metals into the rice plant as shown, for example, by Cd and Pb concentrations of 0.09?±?0.01 and 0.10?±?0.04 mg/kg respectively in the rice grain endosperm. The adaptation of native rice plants, combined with bioaccumulation ratios of 1?±?0.6 to 1.4?±?0.7 calculated for Cd transfer to the rice grain endosperm, and maximum Cd transfer factors of 4.3?±?2.1 to the plant roots, strongly suggest a continuous input of some toxic metals from coal-mining operations to agricultural lands in the region of Cam Pha. In addition, our results imply a sustained absorption of metals by native rice plant varieties, which may lead to metal accumulation (e.g., Cd) in human organs and in turn to severe disease.

Martinez RE; Marquez JE; Hòa HT; Gieré R

2013-08-01

18

Open-pit coal-mining effects on rice paddy soil composition and metal bioavailability to Oryza sativa L. plants in Cam Pha, northeastern Vietnam.  

UK PubMed Central (United Kingdom)

This study quantified Cd, Pb, and Cu content, and the soil-plant transfer factors of these elements in rice paddies within Cam Pha, Quang Ninh province, northeastern Vietnam. The rice paddies are located at a distance of 2 km from the large Coc Sau open-pit coal mine. Electron microprobe analysis combined with backscattered electron imaging and energy-dispersive spectroscopy revealed a relatively high proportion of carbon particles rimmed by an iron sulfide mineral (probably pyrite) in the quartz-clay matrix of rice paddy soils at 20-30 cm depth. Bulk chemical analysis of these soils revealed the presence of Cd, Cu, and Pb at concentrations of 0.146?±?0.004, 23.3?±?0.1, and 23.5?±?0.1 mg/kg which exceeded calculated background concentrations of 0.006?±?0.004, 1.9?±?0.5, and 2.4?±?1.5 mg/kg respectively at one of the sites. Metals and metalloids in Cam Pha rice paddy soils, including As, Cd, Cr, Cu, Hg, Mn, Ni, Pb, and Zn, were found in concentrations ranging from 0.2?±?0.1 to 140?±?3 mg/kg, which were in close agreement with toxic metal contents in mine tailings and Coc Sau coal samples, suggesting mining operations as a major cause of paddy soil contamination. Native and model Oryza sativa L. rice plants were grown in the laboratory in a growth medium to which up to 1.5 mg/kg of paddy soil from Cam Pha was added to investigate the effects on plant growth. A decrease in growth by up to 60 % with respect to a control sample was found for model plants, whereas a decrease of only 10 % was observed for native (Nep cai hoa vang variety) rice plants. This result suggests an adaptation of native Cam Pha rice plants to toxic metals in the agricultural lands. The Cd, Cu, and Pb contents of the native rice plants from Cam Pha paddies exceeded permitted levels in foods. Cadmium and Pb were highest in the rice plant roots with concentrations of 0.84?±?0.02 and 7.7?±?0.3 mg/kg, suggesting an intake of these metals into the rice plant as shown, for example, by Cd and Pb concentrations of 0.09?±?0.01 and 0.10?±?0.04 mg/kg respectively in the rice grain endosperm. The adaptation of native rice plants, combined with bioaccumulation ratios of 1?±?0.6 to 1.4?±?0.7 calculated for Cd transfer to the rice grain endosperm, and maximum Cd transfer factors of 4.3?±?2.1 to the plant roots, strongly suggest a continuous input of some toxic metals from coal-mining operations to agricultural lands in the region of Cam Pha. In addition, our results imply a sustained absorption of metals by native rice plant varieties, which may lead to metal accumulation (e.g., Cd) in human organs and in turn to severe disease.

Martinez RE; Marquez JE; Hòa HT; Gieré R

2013-11-01

19

Open-pit coal-mining effects on rice paddy soil composition and metal bioavailability to Oryza sativa L. plants in Cam Pha, northeastern Vietnam.  

Science.gov (United States)

This study quantified Cd, Pb, and Cu content, and the soil-plant transfer factors of these elements in rice paddies within Cam Pha, Quang Ninh province, northeastern Vietnam. The rice paddies are located at a distance of 2 km from the large Coc Sau open-pit coal mine. Electron microprobe analysis combined with backscattered electron imaging and energy-dispersive spectroscopy revealed a relatively high proportion of carbon particles rimmed by an iron sulfide mineral (probably pyrite) in the quartz-clay matrix of rice paddy soils at 20-30 cm depth. Bulk chemical analysis of these soils revealed the presence of Cd, Cu, and Pb at concentrations of 0.146?±?0.004, 23.3?±?0.1, and 23.5?±?0.1 mg/kg which exceeded calculated background concentrations of 0.006?±?0.004, 1.9?±?0.5, and 2.4?±?1.5 mg/kg respectively at one of the sites. Metals and metalloids in Cam Pha rice paddy soils, including As, Cd, Cr, Cu, Hg, Mn, Ni, Pb, and Zn, were found in concentrations ranging from 0.2?±?0.1 to 140?±?3 mg/kg, which were in close agreement with toxic metal contents in mine tailings and Coc Sau coal samples, suggesting mining operations as a major cause of paddy soil contamination. Native and model Oryza sativa L. rice plants were grown in the laboratory in a growth medium to which up to 1.5 mg/kg of paddy soil from Cam Pha was added to investigate the effects on plant growth. A decrease in growth by up to 60 % with respect to a control sample was found for model plants, whereas a decrease of only 10 % was observed for native (Nep cai hoa vang variety) rice plants. This result suggests an adaptation of native Cam Pha rice plants to toxic metals in the agricultural lands. The Cd, Cu, and Pb contents of the native rice plants from Cam Pha paddies exceeded permitted levels in foods. Cadmium and Pb were highest in the rice plant roots with concentrations of 0.84?±?0.02 and 7.7?±?0.3 mg/kg, suggesting an intake of these metals into the rice plant as shown, for example, by Cd and Pb concentrations of 0.09?±?0.01 and 0.10?±?0.04 mg/kg respectively in the rice grain endosperm. The adaptation of native rice plants, combined with bioaccumulation ratios of 1?±?0.6 to 1.4?±?0.7 calculated for Cd transfer to the rice grain endosperm, and maximum Cd transfer factors of 4.3?±?2.1 to the plant roots, strongly suggest a continuous input of some toxic metals from coal-mining operations to agricultural lands in the region of Cam Pha. In addition, our results imply a sustained absorption of metals by native rice plant varieties, which may lead to metal accumulation (e.g., Cd) in human organs and in turn to severe disease. PMID:23990254

Martinez, Raul E; Marquez, J Eduardo; Hòa, Hoàng Th? Bích; Gieré, Reto

2013-08-30

20

Superficial drainage studies in open-pit mines  

International Nuclear Information System (INIS)

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

1984-01-01

 
 
 
 
21

Cut winnings methods of an open-pit mine development  

International Nuclear Information System (INIS)

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)

2007-01-01

22

Energy consumption in open pit mining  

Energy Technology Data Exchange (ETDEWEB)

This article evaluates energy consumption in overburden stripping using draglines, shovels and trucks, and scrapers. Each of these systems is specified. In the dragline mine, overburden preparation, blasting, and reclamation are specified. For the dragline system, electric power accounts for about 40% of the total, compared to only 11% with scrapers. Dragline demonstrates the lowest overall energy costs. This paper measures only the energy cost.

Nilsson, D.; Reddy, N.P.

1983-07-01

23

Computer software for open pit mine design - an overview  

Energy Technology Data Exchange (ETDEWEB)

Computer software for mine modeling and design has been evolving into systems which are strong on interactive graphics, high quality visualization of surfaces and solids, and friendly user interfaces. Fortunately, the days of compiling a file full of numbers to make a program run are long gone. Inexpensive desktop hardware can provide sophisticated graphics and interactive CAD. The latest computer and software technology helps engineers and geologists accomplish mine design and production tasks quickly and efficiently. The article starts by defining the characteristics of computer software needed for surface mine planning then gives a summary of open pit design techniques used in computer software. Brief summaries follow of the capabilities of surface mine design software. The programs listed range from signal application systems such as dragline or haulage simulation to fully integrated systems with geologic data handling, modeling, mine design and reserve calculations. The software characteristics of some 40 programs are also presented in tabular form. 3 refs., 6 figs., 1 tab.

Gibbs, B.L. [Gibbs Associates, Boulder, CO (United States)

1996-09-01

24

Radon and aerosol release from open-pit uranium mining  

International Nuclear Information System (INIS)

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.

1982-01-01

25

Radon and aerosol release from open-pit uranium mining  

Energy Technology Data Exchange (ETDEWEB)

The quantity of /sup 222/Rn (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 /sup 226/Ra (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.

Thomas, V.W.; Nielson, K.K.; Mauch, M.L.

1982-08-01

26

Planning and technical layout of bucket wheel excavators for large open pit mines  

Energy Technology Data Exchange (ETDEWEB)

The first step in planning an open pit mining operation is the geological survey of the deposit using drill cores, to identify the mineable seams, their calorific value, the overburden - coal ratio and hardness of the rocks. The latter will determine whether a bucket wheel excavator system is feasible. The effective output per hour of the system may then be determined and also its theoretical output, the belt widths and belt speed for the conveyors on the machines and for the conveyor system, the bucket wheel parameters, its drive power, the required mining height and bucket wheel outreach and its technical layout. Finally, a mining plan may be drawn up.

Hoffmann, D.

1986-04-01

27

Radon release and dispersion from an open pit uranium mine  

Energy Technology Data Exchange (ETDEWEB)

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.

Kisieleski, W.E.

1980-06-01

28

Preliminary study of realizability of Karazhyra open pit coal fines briquetting  

International Nuclear Information System (INIS)

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)

2001-09-00

29

Management of open pit mining operations with ore stockpiles  

International Nuclear Information System (INIS)

An open pit mining operation consists of mining processing and refining stages. The mining stage is responsible for provision of required amount of ore of pre-defined grade to the processing plant. The heterogeneity in the ore grade in various parts of the deposit leads to the definition of cutoff grade. The material below cutoff grade is sent to the stockpiles for utilization in later years when it becomes economical. The cutoff grade optimization theory maximizes the Net Present Value (NPV) of a mixing operation with a declining effect as the deposit leads toward exhaustion. This declining effect of NPV defines dynamic cutoff grades i.e. higher cutoff grades in the early years of mine life and lower cutoff grades in the later years. However, this precisely defines the amount and grade of material sent to the stockpile for processing in the later years. The management i.e. supply of material from the mine to stockpile and from the stockpile to the processing plant is an issue that is addressed in this paper by developing a cutoff grade optimization algorithm with option to stockpile. The benefits of methodology are elaborated in a case study. (author)

2004-01-01

30

Modelling of the coal extraction plan at the Maxim Gorkij open pit  

Energy Technology Data Exchange (ETDEWEB)

On the basis of the Monte-Carlo method, modelling was carried out for the possible development of the extraction of coal in an open pit for the purpose of insuring fuel stock for electric power stations. The program, written in Fortran, is adapted for the realization on an ES 1040 computer. A technical scheme is presented for the open pit as well as variation values of the possible extraction of coal in it.

Bilwachs, M.

1982-01-01

31

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

Directory of Open Access Journals (Sweden)

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.

Luis C Angulo; José I Huertas; Gloria M Restrepo

2011-01-01

32

Use of abandoned coal/lignite open pits for waste disposal in selected European countries  

International Nuclear Information System (INIS)

The use of abandoned coal/lignite pits as disposal sites for solid waste appears to be a reasonable approach to a difficult problem, especially if they are located close to the waste source. However, a potential for groundwater and soil pollution exists. This issue was discussed by a Group of Experts on Opencast Mining of the UN Economic Commission for Europe because most of the sites are operated by mining companies. This paper contains the major topics of discussion including the significance of the problem, legal aspects, characteristics of the open pits, waste intended for disposal, investigations required to obtain a disposal permit, disposal techniques, protection measures, monitoring environmental impacts, and research trends. A few countries are used as examples

1989-01-01

33

Prediction of land use structure in Anjialing open-pit mine  

Energy Technology Data Exchange (ETDEWEB)

By adopting the method of combining surveying and mapping, aerial photography, statistical analysis, historical analogy and trend inferring, the land use structure of drastically disturbed mined land in Anjialing Open Pit Coal Mine of Pingshuo was studied. The result shows that there will be 1.609 billion m{sup 3} of rock and soil being stripped off, 1200.0 hm{sup 2} of land being excavated and 452.0 hm{sup 2} of land being occupied during the years of 1998 to 2019. Of the total damaged land, there will be 874.3 hm{sup 2} of arable land and 79.0 hm{sup 2} of forest and grass land. However after reclamation planning, the land use structure will be improved remarkably. For example, the proportion of arable land and that of forest land and grass land will be increased from the original 52.9% and 4.8% to 70.7% and 29.3% respectively. Essentially there will not be any barren land and other unused land. The equilibrium of the total amount of arable land in this area is forecast. The result shows that the total amount of arable land in Anjialing Coal Mine reaches equilibrium 26 years after extraction has begun if the restoration time is 6 years. However, it reaches equilibrium 34 years after the commencement of mining if the restoration time is 10 years. 2 refs., 1 fig., 5 tabs.

Bai, Z.; Guo, Q.; Shi, Y.; Shen, G.; Zhao, J. [Shanxi Agricultural University (China)

1999-04-01

34

Hydrodynamic model of the open-pit mine “Buva?” (Republic of Srpska)  

Directory of Open Access Journals (Sweden)

Full Text Available Projecting of the dewatering system of the open-pit mine “Buva?” (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 “Buva?“ 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 “Buva?”.

Polom?i? Dušan; Baji? Dragoljub; Papi? Petar; Stojkovi? Jana

2013-01-01

35

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  

Scientific Electronic Library Online (English)

Full Text Available Abstract in spanish 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 prima (more) rios 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. Abstract in english 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 cr (more) itical 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.

Angulo, Luis C; Huertas, José I; Restrepo, Gloria M

2011-01-01

36

A Heuristic Traditional MIP Solving Approach for Long Term Production Scheduling in Open Pit Mine  

Directory of Open Access Journals (Sweden)

Full Text Available The aim of this study is optimization of long term production scheduling by solving the traditional MIP formulation that the objective function and all of constrains are satisfied. The economic viability of the modern day mine is highly dependent upon careful planning and design. Appropriate planning and operation of large open pit mines are enormous and complex task. Optimization techniques can be successfully applied to resolve a number of important problems that arise in the planning and management of a mine. Optimization of long-term production planning needs correct selection of equipments and labor forces and reducing capital and operation costs. Mixed Integer Linear Programming (MILP) methods are used for optimizing production planning in open pit mines with objective of maximizing the total discounted net present value. But MIP formulation of the production scheduling in open pit mines, particularly in large open pit with many numbers of blocks needs too many variables causing it very difficult or impossible to solve. To over come this problem a new heuristic approach by reducing schedule period and applying primary guess is developed based on mixed integer linear programming to reduce the periods of planning and decrease the number of variable and the number of constraint needed in the formulation. The results of this method compared to existing methods shows the significant reduction of binary variable in MIP formulation and higher chance to obtain the optimal Net Present Value (NPV).

Vahid Rafiee; Omid Asghari

2008-01-01

37

Characterization of airborne particles in an open pit mining region.  

UK PubMed Central (United Kingdom)

We characterized airborne particle samples collected from 15 stations in operation since 2007 in one of the world's largest opencast coal mining regions. Using gravimetric, scanning electron microscopy (SEM-EDS), and X-ray photoelectron spectroscopy (XPS) analysis the samples were characterized in terms of concentration, morphology, particle size distribution (PSD), and elemental composition. All of the total suspended particulate (TSP) samples exhibited a log-normal PSD with a mean of d=5.46 ± 0.32 ?m and ?(ln d)=0.61 ± 0.03. Similarly, all particles with an equivalent aerodynamic diameter less than 10 ?m (PM(10)) exhibited a log-normal type distribution with a mean of d=3.6 ± 0.38 ?m and ?(ln d)=0.55 ± 0.03. XPS analysis indicated that the main elements present in the particles were carbon, oxygen, potassium, and silicon with average mass concentrations of 41.5%, 34.7%, 11.6%, and 5.7% respectively. In SEM micrographs the particles appeared smooth-surfaced and irregular in shape, and tended to agglomerate. The particles were typically clay minerals, including limestone, calcite, quartz, and potassium feldspar.

Huertas JI; Huertas ME; Solís DA

2012-04-01

38

Problems and surveying works in brown coal open pit Belchatow  

Energy Technology Data Exchange (ETDEWEB)

Problems of mining geotechnics are discussed which must be solved in Belchatow mine with cooperation of mining surveying. The tasks regard: making up of the maps, surveying connected with and machine safety in the pit, supervision and control of mining operations, documentation of the deposits, mining designing and mining activity, as well as mining surveying related to environmental protection and regional development.

Chwastek, J. (Politechnika Wroclawska (Poland))

1980-07-01

39

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

International Nuclear Information System (INIS)

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

1983-01-01

40

Optimization of the transition from open-pit to underground operation in combined mining using (0-1) integer programming  

Scientific Electronic Library Online (English)

Full Text Available Abstract in english There are many near-surface deposits with considerable vertical extent that have the potential to be mined by a combined method of open-pit and underground methods. In this regard, there is often a point called 'transition depth' where a decision has to be made whether to continue deepening the pit or change to underground methods. Recently, optimization of the transition from open-pit to underground operation has become an important challenge in mining engineering. Optim (more) ally, to model the transition problem on the basis of maximization of the profit from open-pit and underground mining, (0-1) integer programming has been used. In this method, block economic values of open-pit and underground methods should be imported to the transition model. A hypothetical example is presented in order to assess the model in detail.

Bakhtavar, E.; Shahriar, K.; Mirhassani, A.

2012-01-01

 
 
 
 
41

Duality results for stationary problems of open pit mine planning in a continuous function framework  

Directory of Open Access Journals (Sweden)

Full Text Available Open Pit Mine Planning problems are usually considered in a Mixed Integer Programming context. Characterizing each attainable profile by a continuous function yields a continuous framework. It allows for a more detailed modeling of slope constraints and other material properties of slanted layers. Although the resulting nonlinear programming problems are in general non-convex and non-differentiable, they provide certain advantages as one can directly compute sensitivities of optimal solutions w.r.t. small data perturbations. In this work duality results are derived for the stationary problems of the continuous framework employing an additional condition called convex-likeness.

A. Griewank; N. Strogies

2011-01-01

42

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

International Nuclear Information System (INIS)

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

1991-01-01

43

Efficient cycle time in loaders and trucks can mean increased production for any open-pit mining operation  

Energy Technology Data Exchange (ETDEWEB)

Loading and hauling are two major expenses for open-pit mine operators. Hauling alone can account for up to 30 to 50% of the total mining cost. The cycle time for loading and hauling is one factor that can be improved at almost any mine. Methods by which the cycle can be made more efficient are discussed. Such methods include optimizing fleet size, determining machine compatibility, location of dump sites, and improving the conditions of the hauling routes.

1984-08-01

44

Preventing and fighting the deformations of the constructive elements in open-pit mines and waste dumps  

Energy Technology Data Exchange (ETDEWEB)

The deformations of the constructive elements in open-pit mine and waste dumps are presented, together with actions to be taken in order to prevent and fight them in relation to the development degree and the rock nature. 7 references.

Fodor, D.

1986-01-01

45

Performance analysis and best implementations of old and new algorithms for the Open-Pit Mining Problem  

UK PubMed Central (United Kingdom)

The open-pit mining problem is to determine the contours of a mine, based on economicdata and engineering feasibility requirements in order to yield maximumpossible net income.This practical problem needs to be solved for very large data sets. In practice, moreover,it is necessary to test multiple scenarios taking into account a variety of realizations ofgeological predictions and forecasts of ore value.The industry is experiencing computational difficulties in solving the problem. Yet, theproblem is known to be equivalent to the minimum cut or maximum flow problem. Forthe maximum flow problem there are a number of very efficient algorithms that have beendeveloped over the last decade. On the other hand, the algorithm that is most commonlyused by the mining industry has been devised by Lerchs and Grossmann (LG) [LG64]. Thisalgorithm is used in most commercial software packages for open-pit mining.This paper describes a detailed study of the LG algorithm as compare...

Dorit S. Hochbaum; Anna Chen

46

High-speed photography in open pit blasting  

Energy Technology Data Exchange (ETDEWEB)

The uses and applications of high-speed photography in open pit and strip coal mines are described. Topics covered include cameras, blast photography accessories, equipment selection factors, set-up procedures, film analysis; the use of photography to enhance blast fragmentation, select delays and maximize blast throw in dragline coal mines is also discussed.

1983-01-01

47

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

Directory of Open Access Journals (Sweden)

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

Adel Badri; Sylvie Nadeau; André Gbodossou

2011-01-01

48

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

International Nuclear Information System (INIS)

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

1982-01-01

49

On the atmospheric response to urbanization and open-pit mining under various geostrophic wind conditions  

Energy Technology Data Exchange (ETDEWEB)

Simulations alternatively assuming a real landscape with and without open-pit mines and grown settlements were performed with a non-hydrostatic meteorological model of the meso-{beta}-scale to elucidate whether the atmospheric response to such land-use changes is sensitive to the direction and magnitude of geostrophic wind. The results of simulations with the same geostrophic wind conditions substantiate that the daily domain-averages of the variables of state hardly differ for the different landscape realizations, except for cloud- and precipitating particles. However, land-use changes may significantly affect the local conditions over and downwind of the altered surfaces. The significant differences in the cloud- and precipitating particles, however, are not bound to the surroundings of land-use changes. The vertical component of wind vector, which is modified by the different heating of converted land-use, strongly affects cloud- and precipitation formation by the interaction cloud microphysics-dynamics. The magnitude of atmospheric response changes under the various directions and speeds of geostrophic wind for most of the field quantities and fluxes. 46 refs., 15 figs., 3 tabs.

Moelders, N. [Universitaet Leipzig, Leipzig (Germany). LIM - Institut fuer Meteorologie

1999-07-01

50

Analysis of disposal of uranium mill tailings in a mined out open pit  

International Nuclear Information System (INIS)

[en] Mined out open pits are presently under consideration as disposal sites for uranium mill tailings. In this method of tailings management, the escape of contaminated liquid into an adjacent aquifer is the principal environmental concern. The modified Bishop Method was used to analyze the structural stability of a clay liner along the highwall and fluid flow models were used to analyze the effect of tailings solutions on ground water under several operating conditions. Results of the slope stability analysis showed that it would be necessary to construct the clay liner as a modified form of engineered embankment. This embankment would be similar in construction to that of an earthfill dam. It could be constructed on a 1:1 slope provided the tailings slurry were managed properly. It would be necessary to maintain the freeboard height between the embankment and tailings at less than 4 m. A partially dewatered sand beach would have to be located adjacent to the embankment. Potential leakage and aquifer contamination was modeled for lined and unlined pits of various designs. Sulfate, and possibly U and Th, are the most likely contaminants. Results from the model showed the clay and soil cement lined pit to be most effective in containing the pollutants

1978-07-28

51

Improvement of high productivity blasting technologies in security conditions in underground and open pit mines  

Energy Technology Data Exchange (ETDEWEB)

The paper presents the activities of workers in developing high security, damp proof explosives, manufacturing detonating phases, improving blasting technologies in underground and in open pits and protecting objects located in blasting areas.

Tat, S.; Zaporojan, M.; Fissgus, K.; Heljiu, N.; Ciocoiu, C.

1987-09-01

52

Open pit blasting in India  

Energy Technology Data Exchange (ETDEWEB)

Open pit blasting in India uses two types of explosives. First there are bulk explosives for wet and dry holes, and there are packaged explosives. The Indian open pit coal mining is projected to use 190 thousand metric tons of explosives in 1995. This volume is projected to grow for the next ten years, whereas the underground coal mining will hold fairly constant. Bulk explosives started in about 1977 with watergels. In the late 1980s, bulk emulsions and heavy ANFOs were introduced. This system is still being expanded and is replacing packaged products in the larger mines. Packaged products are still popular where the annual consumption is less than 2,000 metric tons per year. Also, packaged products are used in small wet shots. Porous ammonium nitrate prill have recently become available but ANFO is not very common because of the high cost of the prill and the wet blasting conditions. As the market expands there will be a continuing demand for packaged products but an increasing demand for bulk waterproof products, particularly in the larger operations. Dynamites are produced at four plants in India. The annual production of about 45,000 metric tons per year is holding fairly constant, but is likely to decrease in the future. The future blasting in India will primarily use pumped emulsions and heavy ANFO on an increasing basis, but the packaged products will maintain their position.

Wasson, D.A. [Mining Services International, Salt Lake City, UT (United States); Garg, D.D. [Bharat Explosives Limited, Delhi (India)

1995-12-31

53

Mine design using column analysis: a tool for the incremental evaluation of open-pit mining deposits  

Energy Technology Data Exchange (ETDEWEB)

Column analysis is a method whereby down-hole drill data can be assessed for open-pit mining potential. This technique enables a single hole to be evaluated as a small pit, and can serve as a basis for preliminary mine design. Specific operating costs are assigned to intervals of material as they are encountered from the surface to the base of mining. Summed operating costs are then divided by the units of recoverable product anticipated. The resulting value (on a per unit basis) is then assigned to the individual hole being evaluated, and can be used directly in preliminary mine planning. Profitability can also be determined for each hole by multiplying the difference between the unit cost and the market value of the recovered product by the amount of recovered product. Mine planning can then proceed by evaluating the quantity of favorable holes within a given area, their continuity, and the overall cost and profitability relative to desired or available market and production conditions.

Tracy, L.N.

1984-04-01

54

Analysis of disposal of uranium mill tailings in a mined out open pit  

International Nuclear Information System (INIS)

[en] Mined out open pits are presently under consideration as disposal sites for uranium mill tailings. In this method of tailings management, the escape of contaminated liquid into an adjacent aquifer is the principal environmental concern. The modified Bishop Method was used to analyze the structural stability of a clay liner along the highwall and fluid flow models were used to analyze the effect of tailings solutions on groundwater under several operating conditions. The slope stability of a clay liner was analyzed at three stages of operation: (1) near the beginning of construction, (2) when the pit is partially filled with tailings, and (3) at the end of construction. Both clay lined and unlined pits were considered in the fluid flow modeling. Finally, the seepage of tailings solutions through the clay liner was analyzed. Results of the slope stability analysis showed that it would be necessary to construct the clay liner as a modified form of engineered embankment. This embankment would be similar in construction to that of an earthfill dam. It could be constructed on a 1 : 1 slope provided the tailings slurry were managed properly. It would be necessary to maintain the freeboard height between the embankment and tailings at less than 4 m. A partially dewatered sand beach would have to be located adjacent to the embankment. Potential leakage and aquifer contamination was modeled for lined and unlined pits of various designs. Sulfate, and possibly U and Th, are the most likely contaminants. Results from the model showed the clay and soil cement lined pit to be most effective in containing the pollutants

1978-07-28

55

Storage of industrial waste in coal mines; Endustriyel atiklarin komur ocaklarinda depolanmasi  

Energy Technology Data Exchange (ETDEWEB)

In this paper storage of wastes in coal mines (open pit and underground mining) and basic storing principles, especially the construction of storage spaces and their sealing against underground water, are reviewed. 14 refs., 12 figs., 1 tab.

Kuzu, C.; Okten, G.; Saltoglu, S.

1996-12-31

56

Net present value maximization model for optimum cut-off grade policy of open pit mining operations  

Scientific Electronic Library Online (English)

Full Text Available Abstract in english The optimum cut-off grade policy maximizes the net present value (NPV) of an open pit mining operation subject to the mining, processing, and refining capacity constraints. The traditional approaches to cut-off grade determination ignore the escalation of the economic parameters such as metal price and operating costs during life of an operation, and consequently lead to unrealistically higher values of the objective function. Further, the NPV of a mining operation declin (more) es due to the depletion of the available reserves, causing a decline in the optimum cut-off grade, i.e. higher cut-off grades in the early years of an operation and lower cut-off grades during the later years. Hence, low grade material mined in the earlier years may be stockpiled for processing during later years to offset the effect of escalating economic parameters on NPV. This paper demonstrates the combined impact of introducing economic parameters, escalation and stockpiling options into the cut-off grade optimization model. The model promises an enhancement in NPV as illustrated in a case study incorporating practical aspects of an open pit mining operation.

Asad, M.W.A; Topal, E

2011-11-01

57

The development of a remote-controlled highwall rockbroom-a world first for the open-pit mining industry  

Scientific Electronic Library Online (English)

Full Text Available Abstract in english Jointed rock slopes are generally stable, as there is no freedom of movement for blocks of rock. In an open- pit mining environment, blasting opens up space into which blocks of rock can fail, resulting in the common occurrence of slope failure. Prior to the blasting of a trim pattern, the immediate highwall is scaled, where loose rock material is removed by means of a mechanical scaler. As mining of the pit progresses, the height of the scaled highwall from the pit floor (more) progressively increases. These highwalls are never scaled again for the remainder of the pit life, and time-dependant deterioration contributes to these highwalls becoming subject to rockfall and, sometimes, slope failure. This paper documents the development of a South African innovation, a remote-controlled mechanical highwall scaler, a world first for the mining industry. The scaler will enable open-pit highwalls to be scaled from crest to toe whenever the need arises. It will reduce the risk associated with highwalls and deliver on the Anglo American promise of producing safe, profitable platinum.

van Rensburg, D.; Melis, L.

2012-01-01

58

Slope design based on geotechnical study and numerical modelling of a deep open pit mine in India  

Energy Technology Data Exchange (ETDEWEB)

A detailed geotechnical study and numerical modelling were done for optimum slope design of a deep (170 m) open pit mine in Rajasthan state of India. The study includes physical characterization of the discontinuities in and around the mine, geomechanical properties of the slope materials, estimation of rock mass ratin and rock mass properties. The data related to different geotechnical parameters were collected from the benches of the partially developed mine and logs of the boreholes. Further, numerical modelling was done for slope stability and sensitivity analyses, based on which optimum slope angle was determined. The study revealed 42 and 48{degree} overall footwall and hangingwall slope angles respectively. Sensitivity analysis shows that ground water is detrimental to the slopes. Hence, every attempt should be done to control the ground water condition. 8 refs., 9 figs., 10 tabs.

Singh, V.K.; Prasad, M.; Singh, S.K.; Rao, D.G.; Singh, U.K. [Central Mining Research Institute, Dhanbad (India)

1995-12-31

59

New owner turns southeastern BC's oldest coal mine into profits. How Esso improves coal quality. [British Columbia  

Energy Technology Data Exchange (ETDEWEB)

This paper outlines the history of Byron Creek Collieries and some of the new innovative methods Esso Resources Canada Ltd. has used to turn the mine into a profitable operation. Esso acquired the open pit mine on Coal Mountain in 1981. Coal blending and coal-oil flocculation research in Esso's coal research laboratory in Calgary, Alberta are briefly described.

Brown, A.

1982-12-01

60

Operating experience with pulley coatings in the Fortuna/Bergheim open pit mine of the Rheinische Braunkohlenwerke AG  

Energy Technology Data Exchange (ETDEWEB)

The advancing technical developments and the higher demands imposed on conveyor belts require a continuing adaptation to new insights and practices. With the construction of conveyor systems with capacities of up to 240000 m/sup 3//d, the coatings of conveyor belt pullies have acquired a constantly growing importance. The investigations mentioned in the report were carried out in order to recognize from the variety of installations of belt pullies in the Fortuna/Bergheim open pit mine those in which a higher rate of wear appeared on the pulley coating. In all 550 installations were investigated. In the course of the investigations, up to six maintenance procedures on 144 pullies were necessary. Twenty four pullies with advanced wear on the coatings were subjected to exhaustive investigation. On the basis of these, measured were introduced which have already led to improvements in the service life of drum coatings.

Suchodoll, F.

1983-04-01

 
 
 
 
61

Coal Mining.  

Science.gov (United States)

The panel on coal mining technology of the NRC committee on processing and utilization of fossil fuels was appointed to assess the distribution and quality of the nation's coal reserve, underground and surface mining techniques, processing techniques, man...

1978-01-01

62

Consequences of coal mining and burning in the North Bohemian Brown Coal Basin (2). Territorial consequences of coal mining  

International Nuclear Information System (INIS)

[en] Out of the 1450 km2 of the North Bohemian Brown Coal Basin, the area of the coal-bearing territory is 850 km2. The area occupied by the open pits, spoil banks and mines is nearly 27O km2, out of which over 90 km2 have already been recultivated. Predicted mining development scenarios for the region till 2035 are outlined. The extent of mining will decrease gradually, and land will be reclaimed. The abandoned pits will be filled with water and employed for recreation purposes. The specific features of the individual open pit mines are given. The ways to reduce the adverse environmental impacts of mining are outlined; these include, in particular, desulfurization of existing power plants on the one hand, and energy savings associated with a reduction in mining and power generation activities on the other hand. (J.B.)

63

Bacterial community composition in the water column of a lake formed by a former uranium open pit mine.  

UK PubMed Central (United Kingdom)

Mining of pyrite minerals is a major environmental issue involving both biological and geochemical processes. Here we present a study of an artificial lake of a former uranium open pit mine with the aim to connect the chemistry and bacterial community composition (454-pyrosequencing of 16S rRNA genes) in the stratified water column. A shift in the water chemistry from oxic conditions in the epilimnion to anoxic, alkaline, and metal and sulfide-rich conditions in the hypolimnion was corresponded by a strong shift in the bacterial community, with few shared operational taxonomic units (OTU) between the water layers. The epilimnetic bacterial community of the lake (~20 years old) showed similarities to other temperate freshwater lakes, while the hypolimnetic bacterial community showed similarity to extreme chemical environments. The epilimnetic bacterial community had dominance of Actinobacteria and Betaproteobacteria. The hypolimnion displayed a higher bacterial diversity and was dominated by the phototrophic green sulphur bacterium of the genus Chlorobium (ca. 40 % of the total community). Deltaproteobacteria were only represented in the hypolimnion and the most abundant OTUs were affiliated with ferric iron and sulfate reducers of the genus Geobacter and Desulfobulbus, respectively. The chemistry is clearly controlling, especially the hypolimnetic, bacterial community but the community composition also indicates that the bacteria are involved in metal cycling in the lake.

Edberg F; Andersson AF; Holmström SJ

2012-11-01

64

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

International Nuclear Information System (INIS)

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.)

2010-01-01

65

Slope stability during combined underground and open-pit mining operation  

Energy Technology Data Exchange (ETDEWEB)

Under the combined actions of underground and surface mining operations, the movement and deformation of the slope is a serious problem. Presently, research materials on how to analyse and calculate the effect on slope stability under such conditions are very lacking. Previous studies only considered the effect of surface mining on slope stability, without including the factors due to underground mining. As a result, the analysis and calculations do not match the actual situation, and fail to fully and objectively reflect the degree of slope instability. This paper studies the analytical methods on this problem, and deduces an appropriate calculation method and theory. 2 refs., 4 figs., 1 tab.

Sun, S. [Central Coal Research Institute (China). Fushun Branch

1996-02-01

66

Water resources modeling for decision support in open-pit lignite mining areas  

Energy Technology Data Exchange (ETDEWEB)

Based on an introduction to the water problems in the Lusatian lignite region the paper presents different types of models, which have been developed and/or used for the Lusatian lignite mining region. Such models include groundwater flow and transport models (FEFLOW), long-term water resources planning models (GRM) and decision-support model (DSS MINE). The applicability of such models, their advantages, disadvantages, and their role in practical planning and decision making is discussed. 10 refs., 6 figs., 2 tabs.

Kaden, S. [WASY Institute for Water Resources, Planning and Systems Research Ltd., Berlin (Germany)

1997-08-01

67

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

International Nuclear Information System (INIS)

[en] 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

68

Coal and communities in Vietnam & the Lang Cam Coal Mine  

Energy Technology Data Exchange (ETDEWEB)

Viet Nam's economic growth, demand for electricity, coal deposits and coal resources, anthracite, the Vietnamese Coal Corporation, and potential environmental and socio-economic impacts resulting from development of the coal industry are described. A case study of the Lang Cam Coal Mine is presented that shows some of the challenges faced by the mine and by the community. The Phuc Linh commune is a subsistence farming community of approximately 4500 people. The open pit mine supplies coal for domestic use. Environmental and socioeconomic impacts of the mine on the commune are assessed. The key issues identified are environmental impacts, need for technical training, lack of transparency in resettlement and compensation plans, lack of employment opportunities, loss of land and livelihood, increased social vices, and health and safety risks. Methods for potential mitigation of these issues are suggested. 22 figs.

Wong, M.; Tung, M.; Hoa, T.Q. [Golder Associates, Edmonton, AB (Canada)

2006-07-01

69

New Alberta coal mine gets green light  

Energy Technology Data Exchange (ETDEWEB)

McLeod River Coal Ltd., a wholly owned subsidiary of Manalta Coal Ltd., has received Alberta Energy Resources Conservation Board approval to establish an open pit coal mine and plant in the northwest portion of the Coalspur field, east of Hinton. McLeod proposes to produce up to 4.2 million tonnes/year of thermal coal for 40 years, starting in 1985. The commercial viability of the project must be assessed before construction starts at the McLeod River site. The Board's ruling is subject to provincial cabinet approval.

1983-02-01

70

A method for open pit mining of horizontal and flat mineral deposits  

Energy Technology Data Exchange (ETDEWEB)

In order to increase the safety of mining operations by reducing the deformations of internal banks and reducing the water influx into the operational zone of a pit and through creating favorable conditions for subsequent recultivation, the proposed method includes selective extraction of covering rock of different structures, including soil, the processing of minerals by passes with selective disposition of the covering rocks in the worked space of the pit by the tailing passes along the front of the mining operations. In the process of dumping the rocks of the next tailings pass, the soil coverings are first dumped on the bank of the rocks of the previous trailing pass and then the remaining covering rocks are dumped with a subsequent backing run in the direction from the base of the tailings heap to its surface. The soil rocks are discharged to a level which exceeds the lift level of the waters in the body of the heap. A trench is formed before dumping the rock of each subsequent tailing heap pass near the lower brow of the bank of rocks of the previous tailings pass to the floor of the filtering layer, while the soil rocks are additionally dumped into the cited trench.

Repetukh, V.K.; Astafyev, A.F.; Rogach, M.S.; Smirnov, M.M.; Timchenko, A.I.

1983-01-01

71

Optimization models to reduce CO2 emissions and energy consumption of transport in open pit mines  

Energy Technology Data Exchange (ETDEWEB)

In the mining industry, approximately 20% of total cost corresponds to material transportation and, in the case of copper, 25% of the total energy consumed for extraction. These high values, together with growing concerns over excess CO2 emissions, have motivated the development of the optimization models discussed in this paper. The objective was to introduce energy and environmental variables into production planning and scheduling. The methodology includes variables that can save transportation energy and models that decrease material rehandling and hence, the cost of transportation. Two types of variables were adapted in the model: environmental and energetic. The advantage, leaving aside the costs and mileage of transportation, was a reduction in emissions of CO2 and in the amount of diesel used. With the inclusion of blending constraints, this model could be used in milling or other such processes. The results are shown using graphs. It worth noting that rehandling decreased, Cu production increased, and the model was able to calculate the extraction sequence over all time horizons.

Alpizar, Maria J.; Morales, Nelson; Wiertz, Jaques [Universidad de Chile (Chile)

2010-07-01

72

Simulation of Dynamic Fracturing of Continuum Rock in Open Pit Mining  

Directory of Open Access Journals (Sweden)

Full Text Available To investigate the dynamic fracture mechanism related to blast-induced borehole breakdown and crack propagation, 2D distinct element commercial code was used. The dynamic stresses, material status and velocity vectors are plotted and shown to evaluate rock mass failure under blast load. This paper focuses on the propagation and dynamic effects of blast waves in continuum rock masses. In order to investigate the effect of high strain rate loading on rock mass failure, a numerical simulation was conducted. The 2D distinct element code was used to model blast load effect on rock failure and stress distribution through the rock mass due to blast wave propagation. The blast loading history was simplified and applied to the blasthole walls. Accordingly, the interaction of explosive energy transferred to the rock mass from the blasthole pressure was examined as a function of time. A Mohr-Coulomb material model was used for host rock to allow for plastic failure calculations. The conducted numerical study describes the role of dynamic stresses in blasting in a qualitative manner. On the other hand, a free face boundary was considered as a common blast operation which is conducted in surface mining.

Zeinab Aliabadian; Mansour Sharafisafa; Mohammad Nazemi

2013-01-01

73

Problems of the old mine from advance breakage in the open pit mine Nástup Tušimice  

Directory of Open Access Journals (Sweden)

Full Text Available Recently the opencast mining operations of lignite are carried out at abandoned underground mine Ludmila (formerly Elsa) area at former village Kralupy nearby the city of Chomutov. It causes a plenty of difficulties. The digital maps of former underground mining production and precaution of safety secure at former underground mining areas are described in the paper.

Stanislav Dejl; Martin Vrubel

2007-01-01

74

Stimulation of sulfate-reducing bacteria in lake water from a former open-pit mine through addition of organic wastes  

Energy Technology Data Exchange (ETDEWEB)

A method to improve water quality in a lake occupying a former open-pit mine was evaluated in a laboratory-scale study. Untreated pit lake water contained high levels of sulfate, iron, and arsenic and was mildly acidic ({approximately} pH 6). Varying amounts of two locally available organic waste products were added to pit water and maintained in microcosms under anoxic conditions. In selected microcosms, populations of sulfate-reducing bacteria increased with time; sulfide was generated by sulfate reduction; sulfate, iron, and arsenic concentrations approached zero; and pH approached neutrality. Best results were obtained with intermediate amounts of waste potato skin.

Castro, J.M.; Wielinga, B.W.; Gannon, J.E.; Moore, J.N.

1999-03-01

75

Gregg River mine introduces metallurgical coal to Manalta operations  

Energy Technology Data Exchange (ETDEWEB)

Origins, geology, mining plans, coal preparation plant, and transportation facilities are described for the open pit Gregg River mine, 36 km south of Hinton, Alberta. Start-up is planned for April, 1983. The project is a joint venture between Gregg River Coal Ltd., a wholly owned subsidiary of Manalta Coal Ltd. (60%) and seven Japanese Companies (40%). The mine will produce 2.1 million tonnes/year of metallurgical coal for export to Japan and at full production will employ 700 people.

1982-09-01

76

Dispersion and bioaccumulation of elements from an open-pit olivine mine in Southwest Greenland assessed using lichens, seaweeds, mussels and fish.  

UK PubMed Central (United Kingdom)

This study investigated dispersion and bioaccumulation of mining-related elements from an open-pit olivine mine at Seqi in Southwest Greenland (64°?N) using lichens (Flavocetraria nivalis), seaweeds (Fucus vesiculosus), mussels (Mytilus edulis) and fish (Myoxocephalus scorpius). The mine operated between 2005 and 2009, and samples were taken every year within a monitoring area 0-17 km from the mine during the period 2004-2011. A total of 46 elements were analysed in the samples. After mining began, highly elevated metal concentrations, especially nickel (Ni), chromium (Cr), iron (Fe) and cobalt (Co), were observed in lichens relative to pre-mining levels (up to a factor of 130) caused by dust dispersion from the mining activity. Elevated metal concentrations could be measured in lichens in distances up to ~5 km from the mine/ore treatment facility. Moderately elevated concentrations of Ni and Cr (up to a factor of 7) were also observed in seaweeds and mussels but only in close vicinity (<1 km) to the mine. Analyses of fish showed no significant changes in element composition. After mine closure, the elevated metal concentrations in lichens, seaweeds and mussels decreased markedly, and in 2011, significantly elevated metal concentrations could only be measured in lichens and only within a distance of 1 km from the mine.

Søndergaard J

2013-08-01

77

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

Directory of Open Access Journals (Sweden)

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

Marcos E. Hartwig; Waldir R. Paradella; José C. Mura

2013-01-01

78

Tanacetum vulgare as a Bioindicator of Trace-Metal Contamination: A Study of a Naturally Colonized Open-Pit Lignite Mine.  

UK PubMed Central (United Kingdom)

We investigated the possibility of use of Tanacetum vulgare (tansy) as an ecological indicator of metal concentration in a naturally colonized open-pit lignite mine in Be?chatów (Poland). Tanacetum vulgare is the only species growing abundantly and spontaneously in the lignite mine waste dumps. Metal concentrations in roots, stems, leaves, flowers, and soil were measured in dump sites differing in type and time of reclamation and therefore differing in pollution levels. Tanacetum vulgare appeared to be an accumulator of chromium and iron in roots, whereas highest concentrations of manganese and zinc were found in leaves. A high bioaccumulation factor for cadmium (Cd) was observed in dumps and control sites, indicating that even small amounts of Cd in the environment may result in significant uptake by the plant. The lowest concentrations of metals were found in plants from sites situated on dumps reclaimed with argillaceous limestone.

Jasion M; Samecka-Cymerman A; Kolon K; Kempers AJ

2013-10-01

79

Tanacetum vulgare as a Bioindicator of Trace-Metal Contamination: A Study of a Naturally Colonized Open-Pit Lignite Mine.  

Science.gov (United States)

We investigated the possibility of use of Tanacetum vulgare (tansy) as an ecological indicator of metal concentration in a naturally colonized open-pit lignite mine in Be?chatów (Poland). Tanacetum vulgare is the only species growing abundantly and spontaneously in the lignite mine waste dumps. Metal concentrations in roots, stems, leaves, flowers, and soil were measured in dump sites differing in type and time of reclamation and therefore differing in pollution levels. Tanacetum vulgare appeared to be an accumulator of chromium and iron in roots, whereas highest concentrations of manganese and zinc were found in leaves. A high bioaccumulation factor for cadmium (Cd) was observed in dumps and control sites, indicating that even small amounts of Cd in the environment may result in significant uptake by the plant. The lowest concentrations of metals were found in plants from sites situated on dumps reclaimed with argillaceous limestone. PMID:23748998

Jasion, Mateusz; Samecka-Cymerman, Aleksandra; Kolon, Krzysztof; Kempers, Alexander J

2013-06-08

80

Performance evaluation of a new stochastic network flow approach to optimal open pit mine design-application at a gold mine  

Scientific Electronic Library Online (English)

Full Text Available Abstract in english The optimal design of production phases and ultimate pit limit for an open pit mining operation may be generated using conventional or stochastic approaches. Unlike the conventional approach, the stochastic framework accounts for expected variability and uncertainty in metal content by considering a set of equally probable realizations (models) of the orebody. This paper evaluates the performance of a new stochastic network flow approach for the development of optimal pha (more) se design and ultimate pit limit using a gold deposit as the case study. The stochastic and conventional frameworks as considered here utilize the maximum flow and Lerchs-Grossman (LG) algorithms, respectively. The LG algorithm is restricted to considering an estimated (average-type) orebody model, while the stochastic maximum flow algorithm is developed to simultaneously use a set of simulated orebody realizations as an input. The case study demonstrates that, when compared to the conventional LG algorithm as used in the industry, the stochastic approach generates a 30 per cent increase in discounted cash flow, a 21 per cent larger ultimate pit limit, and about 7 per cent more metal, while it maintains a consistency in phase size.

Asad, M.W.A.; Dimitrakopoulos, R.

2012-07-01

 
 
 
 
81

Análise comparativa de metodologias utilizadas no despacho de caminhões em minas a céu aberto/ Comparative analysis of the methodologies used to dispatch trucks in open pit mines  

Scientific Electronic Library Online (English)

Full Text Available Abstract in portuguese No presente trabalho, realizou-se uma análise comparativa das metodologias utilizadas para o despacho de caminhões em minas a céu aberto. Comparações entre essas metodologias contam com poucos trabalhos publicados na literatura. Metodologias baseadas em programação linear e programação dinâmica e em heurística foram implementadas. Essas metodologias constituem as bases dos algoritmos de alguns dos sistemas de despacho comercializados no Brasil. Foi desenvolvido (more) um modelo de simulação, a fim de se reproduzir o comportamento das operações de lavra de forma a avaliar o impacto das decisões de despacho em cada uma das metodologias estudadas. Os resultados obtidos mostraram o desempenho dos algoritmos, utilizando-se essas metodologias sob diferentes condições em minas a céu aberto. Porém não se pode, através dos resultados obtidos, concluir pela superioridade de uma delas. Abstract in english In the present study a comparative analysis of the methodologies used to dispatch trucks in open pit mines has been carried out. There is a lack of studies comparing these methodologies in literature. Methodology based on linear and dynamic programming, as well as a heuristics-based methodology, have been implemented. These methodologies serve as the basis of algorithms used in some of the dispatch systems sold in Brazil. A simulation model was developed to reproduce the (more) behavior of mining operations in order to evaluate the impact of dispatch decisions in each of the methodologies studied. Results show the performance of algorithms that have used these methodologies under different conditions in open pit mining. However, from results obtained in the present study, it is not possible, to state the superiority of any of them.

Rodrigues, Lásara Fabrícia; Pinto, Luiz Ricardo

2012-09-01

82

Monitoring report of groundwater quality in and around the former Yotsugi open-pit mining site, Ningyo-toge, Okayama, Japan  

Energy Technology Data Exchange (ETDEWEB)

Monitoring of groundwater quality from boreholes in and around the former Yotsugi open-pit mining site in the Ningyo-toge Environmental Engineering Center, JNC, have been carried out to estimate extent and quality of contaminated water plume from the buried heap-leaching residue. In this report, data collected from 1979 to 1998 fiscal year were listed and their spatial and time variation of physicochemical parameters, uranium and radium were also summarized. Additionally, groundwater sampler has been improved and analytical method has been modified. Some results from groundwater quality were; 1. Generally, electric conductivity and concentrations of uranium and radium outside of the site tend to lower than one from the inside area. 2. Data from borehole No. 13, installed outside of the site, exceptionally little higher than one from the inside area. (author)

Matsumura, Toshihiro; Takeuchi, Akira; Sato, Kazuhiko; Tsurudome, Koji; Tokizawa, Takayuki [Environmental Research and Development Group, Ningyo-toge Environmental Engineering Center, Japan Nuclear Cycle Development Inst., Kamisaibara, Okayama (Japan)

1999-08-01

83

Uma heurística para o planejamento operacional de lavra com alocação dinâmica de caminhões/ A heuristic for the open-pit mining operational planning problem with dynamic truck allocation  

Scientific Electronic Library Online (English)

Full Text Available Abstract in portuguese Esse trabalho trata do planejamento operacional de lavra em minas a céu aberto com alocação dinâmica de caminhões. Esse problema consiste em determinar o número de viagens que cada caminhão deve fazer a cada frente de lavra, bem como decidir em quais frentes de lavra alocar as carregadeiras, de sorte a atender as metas de produção e qualidade requeridas para o minério a ser produzido, fazendo o melhor aproveitamento da frota de veículos disponível. Dada sua co (more) mplexidade combinatória, o problema é resolvido por meio de um algoritmo heurístico baseado na metaeurística Iterated Local Search. O algoritmo proposto é testado usando-se dados reais e seus resultados são comparados com aqueles encontrados pelo otimizador LINGO aplicado a um modelo de programação matemática. Abstract in english This work addresses open-pit mining operational planning with dynamic truck allocation. The problem involves determining the number of trips that each mining truck would do to each mining face, as well as deciding to which face the shovels are to be allocated, in order to meet the production and quality targets, and to achieve the best utilization of the available fleet. Due to the combinatorial complexity of the problem, it is solved using a heuristic algorithm based on (more) the Iterated Local Search metaheuristic. The proposed algorithm is tested using real data and the results are compared against those produced by a LINGO-based mathematical programming model.

Araújo, Francisco César Rodrigues de; Souza, Marcone Jamilson Freitas

2011-03-01

84

Numerical Study on an Applicable Underground Mining Method for Soft Extra-Thick Coal Seams in Thailand  

Directory of Open Access Journals (Sweden)

Full Text Available The EGAT Mae Moh Mine is the largest open pit lignite mine in Thailand and it produces lignite about 16 million tons annually. In the near future, the pit limit of the mine will be reached and underground mine will then be developed through the open pit in the depth of 400 - 600 m from the surface. However, due to the challenges for underground mining such as poor geological conditions, extra thickness (20 - 30 m) of coal seams, and weak mechanical properties of coal seams and the surrounding rock, the success possibility of underground mining and an applicable underground mining method is being investigated at the present. The paper discusses the applicability of multi-slice bord-and-pillar method for the soft extra thick coal seams in the Mae Moh mine by means of numerical analyses using the 3D finite difference code “FLAC3D”.

Nay Zarlin; Takashi Sasaoka; Hideki Shimada; Kikuo Matsui

2012-01-01

85

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

Energy Technology Data Exchange (ETDEWEB)

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. 4 refs., 1 fig., 3 tabs.

Wang, Z.; Xiao, X.; He, Z. [Liaoning Technical University, Fuxin (China). Resource & Environment Engineering Institute

2001-12-01

86

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

International Nuclear Information System (INIS)

In this study, a groundwater flow and transport model was used to estimate the contamination of watersheds located in the Bitterfeld area in Germany. The contamination was caused by previous open pit lignite mining activities in the region as well as by contaminants from a chemical plant. A high resolution geological model of the area was used to parametrize the model. The region is geologically complex, with Pleistocene channels and gullies from the Saalenian age. The mining activities also disturbed or destroyed many geological structures in the region. A geological description was provided, as well as details of hydraulic conductivity, lithology, and hydrostratigraphy. The model was based on borehole data and maps covering a total area of 60 km2. The time-dependent groundwater recharge and boundary conditions were set. Dispersivity and diffusivity parameters were also considered. The model accurately characterized the successive spreading of groundwater contamination over the last 100 years in the area. The study showed that the contamination will spread to nature reserve zones in the region over the next few decades. 3 refs. 1 tab., 2 figs.

2010-01-01

87

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

International Nuclear Information System (INIS)

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

1990-01-01

88

Coal mining at the Sunagawa (Japan) mine  

Energy Technology Data Exchange (ETDEWEB)

Coal mining at the Sunagawa mine began in 1914. The new mining technology, which involves using hydraulic coal mining, was introduced to the mine in 1964. In recent years, the hydraulic coal mining method has been continuously improved and expanded in its applications. Today, the mine works inclined seams at depths of 900 to 1000 meters.

Nishida, M.

1983-01-01

89

Change detection over Sokolov open-pit mining area, Czech Republic, using multi-temporal HyMAP data (2009-2010)  

Science.gov (United States)

Two HyMap images acquired over the same lignite open-pit mining site in Sokolov, Czech Republic, during the summers of 2009 and 2010 (12 months apart), were investigated in this study. The site selected for this research is one of three test sites (the others being in South Africa and Kyrgyzstan) within the framework of the EO-MINERS FP7 Project (http://www.eo-miners.eu). The goal of EO-MINERS is to "integrate new and existing Earth Observation tools to improve best practice in mining activities and to reduce the mining related environmental and societal footprint". Accordingly, the main objective of the current study was to develop hyperspectral-based means for the detection of small spectral changes and to relate these changes to possible degradation or reclamation indicators of the area under investigation. To ensure significant detection of small spectral changes, the temporal domain was investigated along with careful generation of reflectance information. Thus, intensive spectroradiometric ground measurements were carried out to ensure calibration and validation aspects during both overflights. The performance of these corrections was assessed using the Quality Indicators setup developed under a different FP7 project-EUFAR (http://www.eufar.net), which helped select the highest quality data for further work. This approach allows direct distinction of the real information from noise. The reflectance images were used as input for the application of spectral-based change-detection algorithms and indices to account for small and reliable changes. The related algorithms were then developed and applied on a pixel-by-pixel basis to map spectral changes over the space of a year. Using field spectroscopy and ground truth measurements on both overpass dates, it was possible to explain the results and allocate spatial kinetic processes of the environmental changes during the time elapsed between the flights. It was found, for instance, that significant spectral changes are capable of revealing mineral processes, vegetation status and soil formation long before these are apparent to the naked eye. Further study is being conducted under the above initiative to extend this approach to other mining areas worldwide and to improve the robustness of the developed algorithm.

Adar, S.; Notesco, G.; Brook, A.; Livne, I.; Rojik, P.; Kopacková, V.; Zelenkova, K.; Misurec, J.; Bourguignon, A.; Chevrel, S.; Ehrler, C.; Fisher, C.; Hanus, J.; Shkolnisky, Y.; Ben Dor, E.

2011-10-01

90

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

Energy Technology Data Exchange (ETDEWEB)

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

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

2011-07-01

91

The mine planning process for an open-pit diamond mining operation - a case study on Letseng diamond mine in Lesotho  

Scientific Electronic Library Online (English)

Full Text Available Abstract in english This paper discusses the mine planning process for Letseng diamond mine in the Kingdom of Lesotho, in conjunction with the various software packages used during the process. The major pillars of the long-term mine planning process at Letseng are pit optimization followed by pit design and scheduling. Letseng uses Gemcom Whittle and GEMS for pit optimization and design and Runge XPAC for scheduling. The output of the mine planning process results in the generation of publi (more) shed mineral reserves and provides input into the Letseng overall business plan. The process of defining the key inputs for the entire mine planning process is discussed, which covers: ? Slope design as an input ? Diamond price inputs ? Operating and capital cost inputs ? Generation of pit shells ? Selection of an optimum pit shell and interim cutbacks using operational scenarios ? Sensitivity analysis on the selected optimum pit shell. ? Slope design criteria in the detailed design ? Split shell vs concentric pit design ? Practical mining widths to determine cutback design ? Pit design process in the GEMS software package. ? Development of scheduling scenarios in the XPAC software package ? Planning through mining production bottlenecks. ? Company-level NPV model ? Comparing scenarios and input of the different schedule scenarios into the company NPV model.

Madowe, A.

2013-01-01

92

Dimensionamento estrutural de estradas de mina a céu aberto Haul roads structural design in open pit mines  

Directory of Open Access Journals (Sweden)

Full Text Available Uma estrada de mina foi dimensionada com materiais típicos ocorrentes em mineração de minério de ferro no Brasil, utilizando-se os métodos empíricos CBR e DNER. Através do programa de dimensionamento estrutural mecanístico-empírico ELSYM5, compararam-se os resultados obtidos pelos métodos anteriores e propôs-se a otimização do dimensionamento feito pelo método DNER. Os resultados mostram que a espessura total do pavimento calculada pelos dois métodos é, basicamente, a mesma, sendo que a espessura da camada de base pelo método DNER é superior à obtida pelo CBR, enquanto o oposto ocorre com a sub-base. Ambos os dimensionamentos mostram, através da aplicação do software ELSYM5, que não são os mais apropriados, visto que a deformação de algumas camadas, principalmente no caso CBR, está acima do limite aceitável de 2000 µ?. Através da variação da espessura das camadas, obteve-se um dimensionamento adequado, que levou à redução da espessura da camada total do pavimento de 1,97 m para 1,40 m. A redução da deformação das camadas, em que se variou o módulo de elasticidade, demonstra a importância da realização de ensaios de caracterização física dos materiais.An unpaved mine haul road, based on CBR and DNER empirical methods, was designed using materials which are typical in current Brazilian iron ore mining. By means of the mechanistic-empirical structural ELSYM5 software, the results obtained by previous methods were compared and an optimization of the DNER design was proposed. The results demonstrate that the total thickness of the pavement calculated by the two methods is basically the same and that the base layer thickness calculated by the DNER method is superior to the one obtained by the CBR method, whereas the opposite occurs in relation to the sub-base. Both designs show through the application of ELSYM5 software that they are not the most appropriate, since the strain of some layers, especially in the CBR case, is above the acceptable limit of 2000 µ?. Analyzing the variation of the layer's thickness, it was possible to obtain an adequate design, which led to the reduction of the total pavement layer thickness from 1.97 m to 1.40 m. The reduction of the layer's strain in which the elastic modulus was submitted to variation, demonstrates the importance of performing tests for the physical characterization of materials.

Lilian Masetti Lobo Soares de Sousa; Waldyr Lopes de Oliveira Filho; Hernani Mota de Lima

2012-01-01

93

Handling equipment Selection in open pit mines by using an integrated model based on group decision making  

Directory of Open Access Journals (Sweden)

Full Text Available Process of handling equipment selection is one of the most important and basic parts in the project planning, particularly mining projects due to holding a high charge of the total project's cost. Different criteria impact on the handling equipment selection, while these criteria often are in conflicting with each other. Therefore, the process of handling equipment selection is a complex and multi criteria decision making problem. There are a variety of methods for selecting the most appropriate equipment among a set of alternatives. Likewise, according to the sophisticated structure of the problem, imprecise data, less of information, and inherent uncertainty, the usage of the fuzzy sets can be useful. In this study a new integrated model based on fuzzy analytic hierarchy process (FAHP) and fuzzy technique for order preference by similarity to ideal solution (FTOPSIS) is proposed, which uses group decision making to reduce individual errors. In order to calculate the weights of the evaluation criteria, FAHP is utilized in the process of handling equipment selection, and then these weights are inserted to the FTOPSIS computations to select the most appropriate handling system among a pool of alternatives. The results of this study demonstrate the potential application and effectiveness of the proposed model, which can be applied to different types of sophisticated problems in real problems.

Abdolreza Yazdani-Chamzini; Siamak Haji Yakhchali

2012-01-01

94

Quinsam Coal Mine reclamation : 25 years of reclamation experience  

Energy Technology Data Exchange (ETDEWEB)

Reclamation research and planning was initiated at British Columbia's Quinsam Coal Mine in the early 1980s prior to the commencement of mining in 1986 by Brinco Mining Ltd. Reclamation is directed at returning forest productivity and providing wildlife habitat to areas disturbed by both open pit and underground mining. Since 1994, mining has been conducted entirely underground and the footprint of the mine has not expanded since cessation of open pit operations. This article summarized the results of reclamation work completed on mining disturbances and presented plans for future reclamation. In 1982, reclamation trials were established on an old test pit in a manner that would ensure the test pit was effectively reclaimed with the completion of the trials. A variety of substrate materials for growth of trees was used in the trials along with combinations of topsoil, oxidized till and course rock. Three legume species were also tested in combination with planted Douglas-fir seedlings. The initial results of the trials were promising, with good cover of the seeded species established. Resloping of mine wastes, covering the wastes with rooting media and seeding has also been an ongoing part of the mining activities at the mine since the cessation of surface mining. Reclamation at the Quinsam Coal Mine is based on the process of ecological restoration as defined by the Society for Ecological Restoration International (SERI), which involves mitigating the factors that are preventing or slowing vegetation growth in restored ecosystems that have been damaged, degraded or destroyed. Re-establishment of the natural succession trajectories is essential to the long term performance of the reclamation. 11 refs., 1 tab., 4 figs.

Polster, D. [Polster Environmental Services Ltd., Duncan, BC (Canada); DuBois, C. [Quinsam Coal Corp., Campbell River, BC (Canada)

2007-10-01

95

Open-pit construction  

International Nuclear Information System (INIS)

[en] 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.)[de] Das Konzept eines KKW (aus SR 136) in tiefen Baugruben im Fels am Rand eines Plateaus mit Zugaengen von oben sowie horizontal vom Vorfluter wurde weiterentwickelt. Durch hoehere Lockergesteinsueberschuettung kann das Reaktorgebaeude hoehere aeussere Einwirkungen und hoeheren Innendruck aus Stoerfallatmosphaere ertragen. In den Kondensationsraeumen wird Leckage gesammelt und ein Teil der Stoerfallatmosphaere abgekuehlt. Ein ausserhalb liegender Sicherheitseinschluss und Leckageabsaugungen halten sie weitgehend eingeschlossen. Dadurch koennen die Folgen von Kernschmelzunfaellen mit dieser Bauweise erheblich gemildert werden. (orig.)

1981-01-01

96

Coal Mines Security System  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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...

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

97

Continuous surface miner (CSM) and its potential application to surface coal mining in China  

Energy Technology Data Exchange (ETDEWEB)

The selection of open pit equipment is an important aspect in modern surface mining. This paper analyses the conventional surface mining technologies using rope shovels or bucket wheel excavators. Although these technologies are commonly used world-wide, they have limitations as regards maintaining a high efficiency and achieving the best selective mining of complex coal seams in mines. The Continuous Surface miner (CSM), as a new type of mining equipment, has a strong cutting force and a powerful capability in selective mining with a high degree of accuracy. As the technology develops, it is likely that CSM will become an ideal surface mining machine for hard material and selective mining. This paper examines the development and classification of CSM. The application of CSM to Chinese surface mining is discussed on the basis of selected case studies. The results show that there are splendid prospects for the CSM technology in surface coal mines in China. 10 refs., 5 figs., 7 tabs.

Zhang, R.; Wang, C.; Ren, T.X.; Lin, H.; Wang, Z.; Cai, Q. [China University of Mining and Technology, Xuzhou (China)

1998-07-01

98

Technical and environmental aspects of Coal mining,a case study on Maamba Collieries,Zambia  

International Nuclear Information System (INIS)

[en] This article presents the general flow chart of stripping, mining, processing and handling of coal at Maamba Collieries. Major sources of environmental degradation starting from the Open Pit, Coal Preparation Plant(CCP), Aerial Ropewayup to the Screening Plantand dispatch facilities located some eleven kilometres away at Masuku Rail Terminalare pointed out. Past and on-going efforts by Maamba Collieries at ameliorating and, where feasible, mitigating of adverse environmental impact of mining, processing and handling of coal as well as limitations of these measures as applied at Maamba are presented and discussed. (author)

2002-01-01

99

Mining 94. International mining conference, 'technology for profit'. Conference papers  

Energy Technology Data Exchange (ETDEWEB)

Papers are presented under the following session headings: aspects of international mining industries; open pit operations; underground coal mining technology; transport; aids to profitability; underground coal mining operations; and profit contributors. Selected papers have been abstracted separately on the IEA Coal Research CD-ROM.

1994-01-01

100

Coal mining geostatistics seminar  

Energy Technology Data Exchange (ETDEWEB)

A total of 9 papers were presented at the seminar on the following topics: how the choice of a variogram model affects the resulting kriging estimates; linear techniques in the coal mining industry; an industry perception of geostatistical research priorities in coal preparation applications; coal marketing; an overview of geostatistical methods of predicting washed coal parameters; geostatistical stockpile modelling; classification of coal reserves and resources; geostatistical case studies; and coal deposit modelling. The papers have been abstracted separately.

Gillies, A.D.S.; Just, G.D. (eds.)

1987-01-01

 
 
 
 
101

REDUCTION OF SEISMIC EFFECTS FROM BLASTING IN OPEN PIT COAL-MINES BANOVI?I  

Directory of Open Access Journals (Sweden)

Full Text Available 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.

Josip Krsnik; Zvonimir Ester; Vladimir Štimac

1989-01-01

102

Coal mining methods  

Energy Technology Data Exchange (ETDEWEB)

This paper describes the main methods of coal mining used on flat, moderately and highly pitching thin to thick coal seams, describing the agent, dimensions and production cycles of each. The main method of underground mining used in the USA is room and pillar mining, while the main European method is longwall mining. Longwalling may be in either advance or retreat modes. Shortwalling is used where the coal seams are shallow under a strong roof. Hydraulic mining is suitable for exploiting thin-steep or thick-steep seams, or for seams otherwise too dangerous to exploit as the cutting can be done remotely. Surface mining systems are dominated by strip mining. The main equipment used is power shovels, draglines and bucket-wheel excavators. Land reclamation is becoming increasingly important in surface mining. 36 refs., 16 figs.

Biron, C.; Guney, M. [Istanbul Technical University, Istanbul (Turkey)

1994-12-31

103

Environmental management of coal mines in the Hunter Valley, New South Wales  

Energy Technology Data Exchange (ETDEWEB)

Coal production for the Hunter Valley in New South Wales, Australia is dominated by open-cut mines working the Singleton coal measures and a northern outcropping of the Greta measures. The article describes the environment and outlines the requirements of the two principal state acts controlling the development and operation of coal mines, environmental management and rehabilitation requirements, the Mining Acts 1992 and the Environmental Planning and Assessment Act 1979. It explains the two main methods of surface mining employed in the Hunter Valley, strip-mining and open-pit mining. The environmental program to control air and water quality, to rehabilitate the mined land and to manage rehabilitated land is explained. 9 figs., 4 tabs.

Hannan, J.C.; Gordon, R.M. [NSW Minerals Council, Newcastle, NSW (Australia)

1996-12-31

104

Performance of a pilot scale wetland for nitrogen removal from coal mine drainage  

Energy Technology Data Exchange (ETDEWEB)

The purpose is to use wetlands to remove nitrogen from coal mine drainage. The nitrogen content of drainage from surface coal mines has been identified as a potential environmental concern. The main source of the nitrogen in discharges and seepage from open pits, stockpiles, and waste rock dumps is blasting agents. The study site is an operating coal mine on Vancouver Island. Effluent from the mine`s settling pond was dosed with potassium nitrate to simulate nitrate enrichment. Some results from the third year of wetland operation are presented that show the mass removal efficiencies of total-N and NO{sub 3}-N averaged 96.7% and 90.2% respectively. Peak removal efficiencies occurred during the warm season. Wetland effluent concentrations were within water quality guidelines. The results support the hypothesis that wetlands can mitigate the environmental impacts of mining. 21 refs., 2 figs., 4 tabs.

Whitehead, A.J.; Malick, J.G.; Kelso, B.W.; Cann, J.W. [Norecol Environmental Consultants Ltd., Vancouver, BC (Canada)

1991-06-01

105

Preliminary report on the implications of mining practices in an open-pit gold mine for monitoring of a comprehensive Test Ban Treaty  

Energy Technology Data Exchange (ETDEWEB)

This report summarizes the preliminary results of an ongoing experiment at the Gold Quarry pit, operated by the Newmont Gold Company at Carlin, NV. The purpose of the experiment is 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.

Jarpe, S.P.; Goldstein, P.; Moran, B.; Glenn, L.A.

1995-07-01

106

US coal mining analysed  

Energy Technology Data Exchange (ETDEWEB)

Earlier this year Lehman Brothers produced a report analysing the US coal industry and examining its competitiveness with other fuels. It found that operating costs of coal-fired power plants were 21% lower than nuclear plants, 24% lower than natural gas plants and 60% lower than oil-fired plants. Lehman expects coal to maintain its share of electricity generation beyond 2010. The report discusses coal reserves, productivity of US coal mining, changes in ownership with the industry and transportation costs. This article summarises its content.

NONE

1996-07-12

107

Coal mining in Yorkshire  

Energy Technology Data Exchange (ETDEWEB)

The falling price of oil and availability of cheap foreign coal have made low cost, high productivity coal, as well as the securing of new orders, a necessity for British mines. In the reorganized North Yorkshire Area, this has been achieved so far by investment into mining and coal preparation facilities. At Park Mill Colliery near Huddersfield, a 4 million pound high technology coalface has already halved the mine's losses. In the Selby coalfield, the first underground linking of two of the satellite pits will enable coal to flow from one side of the coalfield to the other. A North Yorkshire pit is also claiming a new European record for a roadheading machine. The South Yorkshire Area consistently produces the cheapest coal in the country. There are at present 14 heavy-duty coal faces, with another 7 planned for the next financial year. The largest single investment in the Area is at Maltby colliery, where a 170 million pound scheme is underway to turn the pit into South Yorkshire's first 2 mt a year mine. Other new technology in use includes automatic condition monitors for mining machinery and a new high horse power trepanner.

1987-06-01

108

Coal Mines Security System  

Directory of Open Access Journals (Sweden)

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.

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

2012-01-01

109

Green technique in coal mining  

Energy Technology Data Exchange (ETDEWEB)

The concept of green technique in coal mining was proposed. Its connotation and technical system were explained. The theory of the green technique in coal mining is the distribution behaviour of joints, fractures and bed separations, and the seepage flow behaviour of methane and water in the broken rock strata caused by the key strata break after mining. The main content of the green technique in coal mining includes water-preserved-mining, coal mining under building and bed separation grouting to reduce surface subsidence, particle extraction and backfill mining, simultaneous extraction of coal and coal-bed methane, coal mine roadway supporting, underground discharge of particle rock refuse and underground coal gasification. 9 refs., 5 figs., 1 tab.

Qian, M.; Xu, J.; Miao, X. [CUMT, Xuzhou (China). College of Mineral and Energy Resources

2003-07-01

110

Revegetation of coal mine soil with forest litter  

Energy Technology Data Exchange (ETDEWEB)

Forest litter, a good source of organic matter and seeds, was applied on undisturbed soil and on coal mine (spoils) in experiments conducted on the Black Mesa Coal Mine near Kayenta, Arizona over a 2-year period (1977-1978). Germination, seedling establishment, plant height and ground cover were evaluated for two seeding treatments (forest litter and no forest litter) and two soil moisture treatments (natural rainfall and natural rainfall plus irrigation). The forest litter was obtained at random from the Coconino National Forest, broadcast over the surface of the soil materials and incorporated into the surface 5 cm of each soil material. Germination, seedling establishment, plant height and ground cover on undisturbed soil and coal mine soil were higher when forest litter was applied than when it was not applied and when natural rainfall was supplemented with sprinkler irrigation than when rainfall was not supplemented with irrigation. Applications of forest litter and supplemental irrigation may ensure successful establishment of vegetation on areas disturbed by open-pit coal mining.

Day, A.D.; Ludeke, K.L.; Thames, J.L.

1986-11-01

111

Numerical Study on an Applicable Underground Mining Method for Soft Extra-Thick Coal Seams in Thailand  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The EGAT Mae Moh Mine is the largest open pit lignite mine in Thailand and it produces lignite about 16 million tons annually. In the near future, the pit limit of the mine will be reached and underground mine will then be developed through the open pit in the depth of 400 - 600 m from the surface. ...

Nay Zarlin; Takashi Sasaoka; Hideki Shimada; Kikuo Matsui

112

Multiple seam coal mining  

Energy Technology Data Exchange (ETDEWEB)

Part 1 of the workshop course concerns dragline operations including the development and operation of a pit for single and multiple coal seams; surface coal mining methods; dragline size selection; calculation of dragline range diagram parameters for common stripping methods; and methods of obtaining maximum dragline production and minimum stripping costs. Part 2 involves operating procedures and techniques for shovels and trucks including productivity and costs. Part 3 contains some background papers mainly concerned with blasting.

Crosby, W.A. (ed.)

1984-01-01

113

Methane emissions from coal mining  

International Nuclear Information System (INIS)

[en] The report estimates global methane emissions from coal mining on a country specific basis, evaluates the technologies available to degasify coal seams and assesses the economics of recovering methane liberated during mining. 33 to 64 million tonnes were liberated in 1987 from coal mining, 75 per cent of which came from China, the USSR, Poland and the USA. Methane emissions from coal mining are likely to increase. Emission levels vary between surface and underground mines. The methane currently removed from underground mines for safety reasons could be used in a number of ways, which may be economically attractive. 55 refs., 19 figs., 24 tabs

1990-01-01

114

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

Energy Technology Data Exchange (ETDEWEB)

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.

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

115

South African coal mining research  

Energy Technology Data Exchange (ETDEWEB)

Compared to the research for gold mining, the Research Organisation's coal mining research effort is smaller in scale and focuses on those aspects which are specific to the South African coal mining industry. The programme of work is designed around three specific areas - Environment, Mining and Strata Control. Investigations within the environment problem relate mainly to safety and health, while work on the mining problem is concerned with the efficiency of mining equipment systems. Aspects covered by the strata control problem include safety, as in the control of ground movements due to underground workings, and efficiency, which is defined as the better utilisation of coal reserves.

1987-01-01

116

Mined coal and coal methane production  

Energy Technology Data Exchange (ETDEWEB)

57 slides/overheads outline the talk covering the following topics: history of mine methane drainage in the US; geological models and GIS; degassing the coal from in-mine and surface locations; methane collection from mine ventilation; and mine methane production techniques and methane uses. The production of CBM from wells and ventilation shafts at the Golden Eagle Mine, Raton Basin, USA was discussed. 16 refs.

Rohrbacher, T.J. [US Geological Survey, Denver, CO (United States)

2002-07-01

117

Nondestructive coal seam mining  

Energy Technology Data Exchange (ETDEWEB)

Based on the experience of mines in the Upper Silesian basin and comprehensive testing, it was established that nondestructive preparatory work on coal seams during their development with the mining pressure being controlled by complete demolition of the roof rock is possible when M=h/ggreater than or equal to7, where M = the preparatory indicator; h, the distance between worked out and working seams; g, the thickness of the seam being worked. However, subsequent development of the worked out seam is more difficult. In developing the seams in descending sequence, the seam being worked is preserved based on the magnitude of the preparatory indicator 5greater than or equal toMgreater than or equal to7; however, in this case it is necessary to include prognostic evaluations for the given mining geologic conditions

Lojas, J.; Konopko, W.

1981-01-01

118

Project design of an open pit colliery in Terkidag, Turkey  

International Nuclear Information System (INIS)

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)

2010-01-01

119

Project design of an open pit colliery in Terkidag, Turkey  

Directory of Open Access Journals (Sweden)

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

H. Kose; C. Pamukcu; E. Yalcin

2010-01-01

120

Fundamentals for calculating removal of harmful substances from coal pits and their scattering. [By natural wind forces but based on wind contour above open pit and temperatures and pressure effects  

Energy Technology Data Exchange (ETDEWEB)

The fundamental factors which determine the nature of removal of suspended substances from a section (quarry) are: quantity of air participating in the air exchange (in ventilation of the open pit) Q and average concentration of suspended substances (SS) C/SUB k/ = C/SUB k/ /sup 1/ + C/SUB/n/ , where C = q/V, q is the quantity of SS contained in the atmosphere of the open pit at the moment in time t; V--volume of the open pit; C /SUB n/ --concentration of SS entering the open pit from the outside. In order to compute Q, an approach is used which is based on the theory of flow of finite dimensions, according to which the air stream above the open pit has a wave nature, for example, under the influence of pressure differential. In this case thermodynamic state of the air mass in the open pit is taken into consideration and the contour of air exchange is calculated by formulas given in the paper. The open pit includes a complex set of sources of SS, organized and unorganized, etc. which are arranged in a limited natural-technological space. This circumstance required a special approach to calculating the scattering of SS. Formulas are proposed in a variant of linear approximation based on the method IEM.

Akhmetov, M.S.; Ashikhmin, G.B.; Kalinin, N.A.; Naumov, V.D.

1982-01-01

 
 
 
 
121

The aspects of development of equipment for large coal pit mines  

Energy Technology Data Exchange (ETDEWEB)

The extraction of coal in China (KNR) based on the long term plan must be increased by two times before the end of the century, that is, increased by 600 million tons a year over the next 18 years. Open pit mining will receive the primary development in this. All of the main coal producing nations are following this path. For instance, open pit extraction of coal in the United States in 1950 comprised only 23.9 percent of the total extraction, while by 1979 it was increased to 60.9 percent; these figures for the USSR are 10.3 and 35 percent, respectively and 37.5 and 60 percent for West Germany (FRG). Open pit extraction reached 99.9 percent in East Germany (GDR) in 1979 and 62.9 percent in Australia, while in China it was only 4.6 percent. Based of Soviet data the time for building a pit as compared with a mine of the identical production capacity is reduced by 71 to 75 percent; in increasing the extraction of coal by the open pit method by 1 percent, the production costs are reduced by 50 million rubles and the number of workers by 10,000 men, the labor productivity is increased by 1.8 percent and there is a savings in lumber of 220,000 cubic meters. Trends in the development of equipment for large coal pits abroad are presented. For instance, three main American companies manufacture single scoop excavators with capacities of 12.7 to 23 cubic meters, 10.6 to 25.9 cubic meters and 10 to 23 cubic meters. The EKG excavator is built in the USSR which has a scoop capacity of 4 to 12.5 cubic meters. A nontransport system for mining and truck transport (dumptrucks with a cargo capacity of 90 to 154 tons) is widely used in the United States. Direct current electric locomotives with a tractive weight of 80 to 180 tons, alternating current locomotives with a tractive weight of 94 to 360 tons, dumptrucks with a cargo capacity of 60 to 80 tons and conveyor belts are widely used in the USSR.

1983-01-01

122

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

Energy Technology Data Exchange (ETDEWEB)

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

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

2003-03-01

123

Coal mining in South Africa  

Energy Technology Data Exchange (ETDEWEB)

The author provides a comprehensive survey of coal mining in South Africa. Of especial interest is a break-down of the domestic and overseas markets for the country`s coal. It is shown that South Africa was the second largest exporter of seaborne steam coal in 1994 (23%) after Australia (26%). Details of labour in the coal industry are given. 12 figs.

Baxter, R. [Chamber of Mines of South Africa, Johannesburg (South Africa). Economic Services Division

1995-09-01

124

Method development and practical use of a series of mining-geological maps to work bauxite fields by the open pit method in Ikharkum  

Energy Technology Data Exchange (ETDEWEB)

Mining-geological maps of bauxite fields characterizing the concentration of formations, relief of the surface, arrangement of beds in the field, and also method development in the use of these maps in the process of operating the field are examined.

Bardossy, G.; Nandori, G.; Pataki, A.

1983-01-01

125

Coal mine subsidence  

International Nuclear Information System (INIS)

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.

1992-01-01

126

Mining lore : Bankhead, mining for coal  

Energy Technology Data Exchange (ETDEWEB)

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

Nichiporuk, A.

2007-09-15

127

Coal Mine Methane in Russia  

Energy Technology Data Exchange (ETDEWEB)

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.

NONE

2009-07-01

128

Funding coal mines  

Energy Technology Data Exchange (ETDEWEB)

The paper highlights some of the key assumptions that both project sponsors and banks have to take into account in determining the feasibility of coal mine projects. Predictions the analysts made about these key risks are compared with what actually happened for three cases: BT Australia`s 1986 valuation of 36% of Ulan; Macquarie`s 1989 valuation of 80% of Mt. Thorley; and Rothschild`s 1990 valuation of Oakbridge whose assets included 80% of Baal Bone and 100% of Clarence, Pelton/Ellalong and Saxonvale/Bulga. 7 tabs.

Clarke, D. [Macquarie Bank Limited (Australia)

1994-12-31

129

Cooling systems for coal mines  

Energy Technology Data Exchange (ETDEWEB)

In gold mining artificial cooling of mines has been used on a large scale for many years. In 1981 the refrigerating capacity in South African mines was about 600 MW. Twice this capacity is anticipated for 1985. Since the early 70's, artificial cooling of mine air has become increasingly important in German coal mining. From 1970 to 1981, the net refrigerating capacity installed in the mines of Bergbau Lippe AGH went up from 6.8 MW to 56 MW. In the same period, Ruhrkohle AG had an increase from 13 MW to 165 MW. This article deals mainly with German mining. (orig.).

Moser, P.

1985-01-01

130

Coal mining, beneficiation and transportation  

Energy Technology Data Exchange (ETDEWEB)

Luscar Ltd. is Canada's largest producer of thermal coal, with sales of 36 million tonnes in 2002. The company's proven and probable reserves are 1,279 million tonnes. Luscar operations are depicted on a map of Canada's coal deposits. Mining operations, coal mining economics, methods and costs of beneficiation, transportation options, and future directions are outlined. 8 figs., 2 tabs., 26 photos.

Flemming, A. [Luscar Ltd., Edmonton, AB (Canada)

2003-07-01

131

Coal mine gas in Australian longwall mining  

Energy Technology Data Exchange (ETDEWEB)

Australian longwall mines operate from 150 to 550 m in depth, and cover a wide range of seam gas conditions. For many, the management of coal seam gas is a critical issue and five types of mines are recognised. These are: high gas and low permeability; high gas and high permeability; thick seams; mines with large gas supplies from seams other than the working seam; and localised problem gases such as hydrogen sulphide. This paper discusses Australian case examples of the 5 types and the hazards and control methods used in the various situations in mines in New South Wales and Queensland. 12 refs., 1 tab.

Mallett, C.W.; Xue, S.; Balusu, R. [CSIRO, Brisbane, Qld. (Australia). Division of Exploration and Mining

2000-03-01

132

Coal mine methane global review  

Energy Technology Data Exchange (ETDEWEB)

This is the second edition of the Coal Mine Methane Global Overview, updated in the summer of 2008. This document contains individual, comprehensive profiles that characterize the coal and coal mine methane sectors of 33 countries - 22 methane to market partners and an additional 11 coal-producing nations. The executive summary provides summary tables that include statistics on coal reserves, coal production, methane emissions, and CMM projects activity. An International Coal Mine Methane Projects Database accompanies this overview. It contains more detailed and comprehensive information on over two hundred CMM recovery and utilization projects around the world. Project information in the database is updated regularly. This document will be updated annually. Suggestions for updates and revisions can be submitted to the Administrative Support Group and will be incorporate into the document as appropriate.

NONE

2008-07-01

133

Selenium bioaccumulation in stocked fish as an indicator of fishery potential in pit lakes on reclaimed coal mines in Alberta, Canada.  

UK PubMed Central (United Kingdom)

Pit lakes are a common reclamation strategy for open pit mines; however, there is a concern about their water quality and suitability as fish habitat because they are often contaminated by metals or metalloids. This study assessed the exposure of fish and invertebrates to selenium (Se) and other metals and metalloids in pit lakes formed by open pit coal mining in Tertiary (thermal coal) and in Cretaceous (metallurgical coal) bedrock. Juvenile hatchery rainbow trout, Oncorhynchus mykiss, and brook trout, Salvelinus fontinalis, were stocked into two thermal coal pit lakes (water Se < 2 ?g/L, low water Se) and two metallurgical coal pit lakes (water Se > 15 ?g/L, high water Se). Se accumulation in stocked fish and concentrations in invertebrates were characterized over a period of 2 years. In the metallurgical pits, invertebrates had higher Se concentrations and fish accumulated Se to higher levels (exceeding USEPA tissue Se guidelines) than biota in the thermal pits. Rainbow and brook trout accumulated similar concentrations of Se in their muscle and exhibited a similar relationship between whole-body and muscle Se concentrations. These results may be used by resource managers to assess compliance with whole-body tissue Se guidelines and to determine if pit lakes in coal mining areas pose a significant Se risk to wildlife or human health. The high Se exposure in metallurgical coal pits indicates that under the current mining and reclamation strategy, these lakes are not suitable for management as recreational "put and take" fisheries.

Miller LL; Rasmussen JB; Palace VP; Sterling G; Hontela A

2013-07-01

134

Calibration of Numerical Model Applied to a Shear Zone Located on a Slope in an Open Pit Mine—Case History  

Directory of Open Access Journals (Sweden)

Full Text Available The instability of a pit mine slope diagnostic caused by the slipping of a localized deep shear zone is described. The slope was designed on ultra basic, serpentine and metabasite rock formations with an angle varying from 40 to 45 de- grees. The perturbed slope zone was classified as RMR 12 and the non-perturbed zone as RMR 75. The boundary of these zones is defined as the shear zone. The pit slope was field mapped in detail and the mechanical properties of the rock were obtained through a laboratory test. The lab data were further processed using the RMR mechanical classifi- cation system. The Distinct Elements Code numerical modeling and simulation software was used to design the pit slope. The model was calibrated through topographic mapping of the points on the ground. The task of calibrating a numerical model is far from simple. Exhaustive attempts to find points of reference are required. The mechanical be- havior in function of the time factor is a problem that has yet to be solved. The instant deformation generated in the numerical model generated functions that can be compared with the deformations of quick shifts acquired in the topog- raphic monitoring. SMR is indeed more often recommended for Pit Slopes, though the fact that we have used RMR does not invalidate the classification for the modeling effect. The main parameters such as spacing, filling, diving direc- tion and continuity allow for compartmentalization of the modeled area. The objective of the modeling was not to pro- ject slopes because this massif was undergoing a progressive slow rupture. The objective of the modeling was to study the movement of the mass of rock and its progressive rupture caused by a shear zone.

Evandro Moraes da Gama; Bruno C. R. da Silva

2012-01-01

135

Highwall stability due to punch mining at opencut coal mines  

Energy Technology Data Exchange (ETDEWEB)

Most of Indonesia's coal is extracted from open cast mines. There are many long highwalls at abandoned mining operations where coal can no longer be safely mined because of weak strata. The feasibility of introducing punch room and pillar mining to Indonesian mines is examined. Conventional highwall mining and punch highwall mining systems are described. The stability of highwalls, because of punch mining, was studied using finite element modelling. The results are discussed. 12 refs., 11 tabs., 1 tab.

Matsui, K.; Shimada, H.; Sasaoka, T.; Cao, H.; Kato, S.; Furukawa, H.; Ueda, T.; Yabuki, A.; Kramadibrata, S.; Sulistianto, B. [Kyushu University, Fukuoka (Japan). Department of Earth Resources Engineering

2003-07-01

136

Coal dust suppression in French coal mines  

Energy Technology Data Exchange (ETDEWEB)

This paper describes methods of coal dust suppression applied in coal mines in France. As the most effective methods for coal dust suppression, water infusion in coal seams, and water spraying by means of nozzles fixed on cutting drums, drilling bits, at loading and haulage facilities, are noted. Drilling patterns of deep water infusion boreholes, and water consumption of infusion and spraying are given along with other details of the methods. Operational parameters of dust collectors are described. The main working operations causing dust pollution are enumerated. Coal cutting and support advance are the main dust sources. The use of spraying nozzles at these sources is outlined. (In Bulgarian)

Pashov, P.

1983-08-01

137

Conveyor to transport barren rocks between two big open-pit brown-coal mines in FDR: Hambach and Fortuna  

Energy Technology Data Exchange (ETDEWEB)

Several information on the project to manufacture 2 conveyors to transport barren grounds at the rate of 240 000 m/sup 3//day on 14,5 km are given. The problem arisen by the ecologists brought several changes. Details on the realisation of these conveyors are presented.

Zenker, P.

1984-06-01

138

Selenium bioaccumulation in stocked fish as an indicator of fishery potential in pit lakes on reclaimed coal mines in Alberta, Canada.  

Science.gov (United States)

Pit lakes are a common reclamation strategy for open pit mines; however, there is a concern about their water quality and suitability as fish habitat because they are often contaminated by metals or metalloids. This study assessed the exposure of fish and invertebrates to selenium (Se) and other metals and metalloids in pit lakes formed by open pit coal mining in Tertiary (thermal coal) and in Cretaceous (metallurgical coal) bedrock. Juvenile hatchery rainbow trout, Oncorhynchus mykiss, and brook trout, Salvelinus fontinalis, were stocked into two thermal coal pit lakes (water Se  15 ?g/L, high water Se). Se accumulation in stocked fish and concentrations in invertebrates were characterized over a period of 2 years. In the metallurgical pits, invertebrates had higher Se concentrations and fish accumulated Se to higher levels (exceeding USEPA tissue Se guidelines) than biota in the thermal pits. Rainbow and brook trout accumulated similar concentrations of Se in their muscle and exhibited a similar relationship between whole-body and muscle Se concentrations. These results may be used by resource managers to assess compliance with whole-body tissue Se guidelines and to determine if pit lakes in coal mining areas pose a significant Se risk to wildlife or human health. The high Se exposure in metallurgical coal pits indicates that under the current mining and reclamation strategy, these lakes are not suitable for management as recreational "put and take" fisheries. PMID:23665755

Miller, L L; Rasmussen, J B; Palace, V P; Sterling, G; Hontela, A

2013-05-12

139

Management of coal mine effluents  

Energy Technology Data Exchange (ETDEWEB)

The report looks at the origin and treatment of minewater effluents from opencast and deep mine workings for coal, and abandoned coal mines, in Scotland. It examines sources of effluent and pollution, and the characteristics of pollution and their environment impacts. Methods for pollution prevention and treatment are outlined. These include reducing pollution by good planning; well designed lagoons or settlement ponds; oxidation of water from old workings; use of flocculants; good practice to prevent spillages of oil from vehicles or storage tanks; treatment of sludge accumulating in lagoons; and use of reed beds (as in the pilot scheme at the Gilmerton coal mine tip in Lothian and at Lambwill in Fife). The procedures for applications for planning and consent to discharge effluents from coal mines are outlined. 13 refs., 9 figs., 3 apps.

NONE

1997-12-31

140

Methane emissions from coal mining  

International Nuclear Information System (INIS)

[en] This paper outlines some of the problems associated with the prediction of levels of methane emission from underground and surface coal mines. Current knowledge of coal mining emissions sources is outlined. On the basis of this information the methodology proposed by the IPCC/OECD Programme on National Inventories is critically examined and alternatives considered. Finally, the technical options for emissions control are examined together with their feasibility. 8 refs., 6 figs., 2 tabs

1993-01-01

 
 
 
 
141

Attempt at assessing coal resource management in black coal mines  

Energy Technology Data Exchange (ETDEWEB)

Efficiency is analyzed of underground black coal mining in Upper Silesia. Fluctuations of coal output, coal reserves, developed reserves and recoverable reserves are discussed with the example of the Manifest Lipcowy mine. Coal losses and mining efficiency in about 70 coal mines in Upper Silesia are analyzed. Resource utilization is analyzed considering: geologic coal resources, recoverable coal reserves and developed coal reserves, ratio of developed reserves to geologic reserves, ratio of developed reserves to recoverable reserves and ratio of operational coal reserves to recoverable reserves. Degree of utilization of recoverable coal reserves in Upper Silesia on the average amounts to 0.62 and in individual mines ranges from 0.28 to 0.87. In 20% of coal mines the degree of recoverable reserve utilization is below 0.50; in 60% of coal mines it ranges from 0.51 to 0.70. Statistical data on the topic are given in 2 tables and 7 diagrams.

Jureczko, J.; Chudzicka, B.; Gruszka, J.

1986-01-01

142

Coal mining technology, economics and policy - 1986  

Energy Technology Data Exchange (ETDEWEB)

This book presents the papers given at a conference on coal mining. Topics considered at the conference included coal preparation, communications, environmental controls, current regulatory issues regarding ground subsidence with longwall mining, personnel management, equipment manufacturers, engineers, contractors, safety and health aspects of mine emergency planning, surface mining operations, coal transport, underground face operations, and underground service operators.

1986-01-01

143

Computer applications in the coal mining industry  

Energy Technology Data Exchange (ETDEWEB)

This paper examines the development of computers and of mining related computer software. Computers have now been applied to every stage of coal mining operations from exploration to overall mine economics. An overview of computer applications in the mining industry is given, and their application in mine management, resource evaluation, mine design, mining operations, monitoring and control, coal preparation, and economic evaluations are shown. Suggestions of possible future developments are described. 24 refs., 6 figs., 1 tab.

Topuz, E.; Nasuf, E. [Virginia Polytechnic Institute and State University, Blacksburg, VA (United States)

1994-12-31

144

Safety systems for coal mines  

Energy Technology Data Exchange (ETDEWEB)

The article describes selected safety devices and automation systems intended for use in underground coal mines: AT-36 conveyor automation system; STERLIN floor railway control system; mining communication systems; GTL-iz loudspeaking communication system and SGB-95 longwall communication system; ARES-4 seismoacoustics system; methane concentration measurement system equipped with KRT-1 methane concentration recorder, VM-1m and VM-1p type manual methane detectors, MK-4 methane detector for heading machines; ROT-1 thyristor starter as well as RRgxz leakage current protection circuit. Use of the above said systems enable the Mine Dispatcher to monitor all technological processes in a mine, thus ensuring safety. 9 figs.

Piskorski, T.; Karwot, J. [Mining Electronic Enterprise ' ZEG' S.A., Tychy (Poland)

2001-07-01

145

Researches on safety of coal mines in China. Chugoku ni okeru tanko hoan kenkyu jokyo ni tsuite  

Energy Technology Data Exchange (ETDEWEB)

In Japan-China joint research project on safety of coal mines, measures for ignition of gas and coal dust in coal mines have been studied since 1990 and are planned to be studied for 4 years. As a part of this project, Japanese delegation visited China in January and February, 1991, to investigate the progress of concerned researches, laboratories, and organizations in China. This report introduces four organizations and their activities. A research institution in Beijing, which is under the control of the energy and industry department to support coal energy policy, manages all researches on the safety of coal mines and has 17 affiliated institutes. There are also 5 institutions including Beijing Research Institute of Mine Construction in its precincts. The Fushun Branch of this institution owns Ventilation Safety Research Laboratory, Open-Pit mining Research Laboratory, etc., and the Chungking Branch has Research Institute of Dust Control and Refuse Utilization, Research Institute of Gas, Fire and Ventilation, etc. The Shanghai Branch consists of Coal mining Mechanization Research Department and someother departments. 8 refs., 7 figs.

Kono, S.; Shikata, N. (National Research Institute for Pollution and Resources, Tsukuba (Japan))

1991-09-25

146

Trends in the Hungarian coal mining industry  

Energy Technology Data Exchange (ETDEWEB)

The oil price surge of the last few years has induced Hungary to make greater efforts on the coal mining sector. Two large-scale projects will help to promote coal mining in Hungary and to develop new deposits.

Fellner, A.

1983-12-01

147

Mining challenges to deal with the land, forestry and environmental aspects  

International Nuclear Information System (INIS)

[en] A summary is given of a report of the IMA Business Commission dealing with mining development planning in Indonesia as related to land matters, forestry and environmental aspects. A summary of land matter management of an open pit coal mine is included

1996-01-01

148

Brown coal mining in Austria  

Energy Technology Data Exchange (ETDEWEB)

In 1983 the coal output of the three brown coal mining companies Graz-Koeflacher Eisenbahn- und Bergbaugesellschaft (GKB), Wolfsegg-Traunthaler Kohlenwerks-Aktiengesellschaft (WTK) and Salzach-Kohlenbergbaugesellschaft m.b.H (Sakog) decreased by a total of 7.9% from 3.3 Mt to 3.04 Mt. The GKB wins coal in the Koeflach area (Styria) from the underground mines at Karlschacht and Zangtal and from the open cuts at Oberdorf and Zangtal. Production dropped by 22% to 0.92 Mt at Oberdorf open cut. In order to utilise the mining equipment at this open cut to the full in spite of this drop in output, overburden operations were intensified considerably. Consequently, the working overburden to coal ratio increased by 55% to 7.3:1. This can indeed be regarded as a favourable development, since the fact that such a large quantity of the overburden has already been removed will ensure that a greater supply of the now more easily recoverable coal will be available for the 300 MW unit of Voitsberg power station when it is put into service in the near future. In the course of exploration to locate workable brown coal deposits 98 bores with a total drilling depth of more than 12 500 m were put down in the Federal provinces of Styria, Carinthia and Lower Austria. In this way new deposits, some of them workable by the open-cut method, were discovered in the vicinity of existing or abandoned coal mines. Geophysical surveys were carried out in the province of Burgenland. The historical development of brown coal mining in Austria is reviewed in the latter part of the present paper. The first brown coal mines are known to have existed about the middle of the 17th century. Brown coal has been mined on a large scale in Austria since the middle of the 19th century. The author discusses the deposits in the individual provinces of Austria in some detail.

Tilmann, W.

1984-04-01

149

Environmental impacts of coal mining in Poland  

Energy Technology Data Exchange (ETDEWEB)

The paper deals briefly with the following effects of coal mining in Poland on: terrain deformation; wastes generation/changes in landscape; changes in the hydrogeological system; hydrogeological and hydrochemical transformations of surface water flows; contamination of the atmosphere (from mining and combustion of coal); contamination of soils; and coal mines closure. 19 refs.

Helios-Rybicka, E.; Rybicki, S. [University of Mining and Metallurgy, Krakow (Poland). Faculty of Geology, Geophysics and Environmental Protection

2003-07-01

150

Canada's largest mining scheme  

Energy Technology Data Exchange (ETDEWEB)

A large coal mining development in Canada's British Columbia, is opening up the wilderness in the northeastern part of that province. North East Coal Development, two open-pit mines operated by Quintette Coal Ltd., and Teck Corporation, both Vancouver-based mining companies, has started to ship to a group of Japanese steel companies 6,500,000 tons annually of metallurgical and additional quantities of thermal coal. To open this wilderness, some 80 miles southwest of Dawson Creek, and to develop the two surface mines, processing plants, and associated facilities involved several massive multimillion-dollar projects. These projects are discussed.

1984-05-01

151

Methane emissions from coal mining - a perspective  

Energy Technology Data Exchange (ETDEWEB)

Methane is one of the significant ingredients in the greenhouse phenomenon. This paper presents an outline of the current evaluation of methane emissions from coal mining in Australia for both underground and open cut mines and also post-mining emissions. The magnitude of the methane emissions from coal mining is compared to other significant sources.

Williams, D.; Saghafi, A.

1993-01-01

152

Modern safety engineering in coal mining  

Energy Technology Data Exchange (ETDEWEB)

The improvements achieved concerning the frequency and the categories of industrial accidents and occupational diseases in coal mining are due to remaskable developments in mining technology and safety engineering. Some examples from the practice of coal mining, from the mining exhibition and from the congress are explained.

Mayer, P.

1981-10-01

153

A study of natural recovery in an aquatic ecosystem affected by mining: the Rodrigatos stream (El Bierzo, Leon, Spain)  

International Nuclear Information System (INIS)

[en] This work takes place into the Bierzo Region, located in northeast of the province of Leon (Spain). In this area numerous open-pit and underground coal mines exist. Some of them are still in activity but almost have been abandoned. In any case, mining implies the presence of coal adits, spoil dumps, tailing dams, and coal-washing plants at the river bank. Most of them persist when mining have finished. (Author)

2008-09-00

154

A study of natural recovery in an aquatic ecosystem affected by mining: the Rodrigatos stream (El Bierzo, Leon, Spain)  

Energy Technology Data Exchange (ETDEWEB)

This work takes place into the Bierzo Region, located in northeast of the province of Leon (Spain). In this area numerous open-pit and underground coal mines exist. Some of them are still in activity but almost have been abandoned. In any case, mining implies the presence of coal adits, spoil dumps, tailing dams, and coal-washing plants at the river bank. Most of them persist when mining have finished. (Author)

Lacal, M.; Herrero, T.; Rodriguez, V.; Alberruche, E.; Vadillo, L.

2009-07-01

155

Coal mining geostatistics seminar  

Energy Technology Data Exchange (ETDEWEB)

A total of 9 papers were presented at the seminar on the following topics: developing variograms for Lucerne no. 8 coal deposits; geostatistics in comparative reserve analysis; classification of coal resources using geostatistics; development of geostatistical reserve calculation procedure and some problems in its application; distance between variograms and sensitivity of kriging; predicting coal processing design problems from in-situ quality; improving coal reserves characterisation performance through geostatistics and simulation; results of some University exercises in geostatistical problem solving; and geostatistics applied to coal preparation.

Gillies, A.D.S.; Just, G.D. (eds.)

1986-01-01

156

Practical coal mining: from seam to market  

Energy Technology Data Exchange (ETDEWEB)

As well as describing the various elements that make up the coal chain (including geology, coal deposits, exploration, mining, preparation, handling, transport and uses), information is presented to illustrate the scale and changing aspects of the Australian coal mining industry today. The emphasis is on the black coal sector.

Robertson, B.

1997-12-31

157

Control of coal mine bursts  

Energy Technology Data Exchange (ETDEWEB)

Dangerously high stress areas can be controlled by proper mine planning and/or destressing. This paper reviews practical methods to detect and destress high-stress zones along coal faces. The US Bureau of Mines investigated stress-related burst problems and destressing efforts (volley firing, auger drilling and hydraulic fracturing) at a cooperating mine. Laboratory tests of the drilling yield method for high stress detection were conducted to determine the correlation between the volume of cuttings obtained and the magnitude of the applied stress. A three-dimensional computer modeling program was used to evaluate the effectiveness of stress relief methods. 8 figs., 11 refs.

Haramy, K.Y.; McDonnell, J.P.; Beckett, L.A.

1988-04-01

158

78 FR 58567 - Criteria to Certify Coal Mine Rescue Teams  

Science.gov (United States)

...MSHA-2013-0037] Criteria to Certify Coal Mine Rescue Teams AGENCY: Mine Safety...comments on revised instruction guides for coal mine rescue team training. MSHA prescribes...instruction guides. Existing standards for coal mine rescue teams include criteria...

2013-09-24

159

German mining equipment  

Energy Technology Data Exchange (ETDEWEB)

The German mining equipment industry developed to supply machines and services to the local mining industry, i.e., coal, lignite, salt, potash, ore mining, industrial minerals, and quarrying. The sophistication and reliability of its technology also won it worldwide export markets -- which is just as well since former major domestic mining sectors such as coal and potash have declined precipitously, and others such as ore mining have all but disappeared. Today, German mining equipment suppliers focus strongly on export sales, and formerly unique German mining technologies such as continuous mining with bucket wheel excavators and conveyors for open pits, or plowing of underground coal longwalls are widely used abroad. The status of the German mining equipment industry is reviewed.

1993-10-01

160

Investment risk assessment in coal mining  

Energy Technology Data Exchange (ETDEWEB)

Evaluates a method for forecasting economic risk associated with construction of an underground coal mine. The risk is associated with insufficient information on the coal deposit and mining and geologic conditions. The following input data are used: daily coal output, coal price, mining cost, investment, period of mine construction, interest rate etc. The Monte Carlo method is used for calculating frequency function of economic efficiency of investment. On this basis the forecast efficiency estimate index, standard deviation, and probability of losses are calculated. Use of the method is discussed on the example of a coal mine in Poland. 5 refs.

Karbownik, A. (Politechnika Slaska, Gliwice (Poland))

1989-01-01

 
 
 
 
161

Coal mining needs a differentiating approach  

Energy Technology Data Exchange (ETDEWEB)

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.

Stoyanov, S.

1988-03-01

162

Topographic Maps and Coal Mining.  

Science.gov (United States)

|Geography teachers can illustrate the patterns associated with mineral fuel production, especially coal, by using United States Geological Survey topographic maps, which are illustrated by symbols that indicate mine-related features, such as shafts and tailings. Map reading exercises are presented; an interpretative map key that can facilitate…

Raitz, Karl B.

1984-01-01

163

Pillar design in coal mines  

Energy Technology Data Exchange (ETDEWEB)

It is suggested that, in bord-and-pillar mining South African pillar design procedures should be refined to make more rational allowance for the differences in strength properties between various coal seams and roof and floor strata. Practices for the protection of surface structures should be revised.

Wagner, H.

1980-01-01

164

Opencast coal mining at Kriel colliery  

Energy Technology Data Exchange (ETDEWEB)

The opencast coal mining operation at Kriel, which is situated midway between the towns of Ogies and Bethal in the eastern Transvaal, is described. The coal is mined by the Coal Division of the Anglo American Corporation from the No. 4 Seam in the Witbank coalfield: it is planned to produce 4.1 million tons from an underground mine and 4.5 million tons by opencast mining. Particular reference is made to the water problems encountered during operation.

Buchan, I.F.

1980-01-01

165

Ingwe develops large coal mine in Australia  

Energy Technology Data Exchange (ETDEWEB)

South Africa`s Ingwe Coal is developing a new operation in Australia, through its wholly-owned, subsidiary Coal Mines Australia Ltd. (CMAL). The operation will explore the Mount Arthur North (MAN) coal development area contiguous to CMAL`s existing Bayswater No. 3 colliery in New South Wales. The opencut mine will be designed to provide flexibility to mine the large number of exposed coal seams. 1 fig., 1 photo.

NONE

1998-10-01

166

On steep coal seam mining method (2)  

Energy Technology Data Exchange (ETDEWEB)

The stratum of Chung Liang Shan coal field in Sichuan Province, China, is an anticline and the coal seams are typical steep multiple seams. The article outlines five mining methods employed by the Chung Liang Shan Mining Industry Bureau to exploit these seams. Methods used are: saw-tooth shaped caving; diagonal saw-tooth shaped mining method with full stowing; diagonal supported slopes with yielding shield support; diagonal shortwall mining; and diagonal longwall mining. 6 figs.

Jiao Jing Li; Liu Biao Y [Chung Liang Shan Mining Industry Bureau (China)

1994-09-01

167

Developments in coal mining machinery in India  

Energy Technology Data Exchange (ETDEWEB)

Since nationalisation of coal mines in India, there has been a major effort towards greater utilisation of coal reserves, and emphasis on greater output, through introduction of advanced technology and equipment. This article considers developments in mechanised coal mining methods and covers equipment used for opencast mining; including studies of the use of continuous mining systems using bucket wheel excavators in combination with shiftable conveyors, and the feasibility of mobile crusher-belt conveyor systems. Developments in longwall mechanized mining and pillar extraction are considered, as well as coal washing equipment and deshalers.

Sastri, D.R.R.

1985-09-01

168

Optimum Coal Mine: striving towards a 'zero effluent' mine  

Scientific Electronic Library Online (English)

Full Text Available Abstract in english Optimum Coal Mine comprises numerous defunct, active, and future mining sections. The mine is primarily a large opencast coal mine; however, underground mining activities will be increasing steadily over the next five years. Opencast and underground mining activities have a significant impact on surface and groundwater resources. To ensure that the mine will be able to continue with its mining operations in the catchment, the extent of this impact requires that substantia (more) l intervention and mitigation measures need to be implemented to ensure the environmental integrity and economic use of the catchment's water resources. In developing a sustainable long-term mine water management strategy, numerous scenarios had to be analysed. The various scenarios are a combination of water and land management activities. The main components of the mine's integrated water management strategy include: Management of water recharge by continual and appropriate rehabilitation of disturbed land Beneficial re-use of impacted mine water for coal plant process water and mining operations Reclamation and desalination of remaining excess impacted mine water to potable standard. From the mine's long-term water balance, it is evident that the continued implementation of numerous water management actions is required to mitigate the water resources impact in a sustainable manner. In addition, the installation of a water reclamation plant at Optimum Coal Mine (15M?/day) is a key step for the mine to achieve a zero impact target.

Cogho, V.E.

2012-01-01

169

Japan's coal mining industry today  

Energy Technology Data Exchange (ETDEWEB)

The following aspects of Japan's coal industry are considered: historical outlook; coal in overall energy structure; outlook of coal policy in Japan; outline of Japanese coal mining industry including coal reserves and their location, coal mining enterprises; labor power; development of coal production; natural conditions underground; coal mining methods and roadway driving; demand of coal; development of disaster occurrence; list of operating coal mines; and research and development.

1986-01-01

170

Coal mining research in South Africa  

Energy Technology Data Exchange (ETDEWEB)

Compared to the research for gold mining, the Research Organisation's coal mining research effort is smaller in scale and focuses on those aspects which are specific to the South African coal mining industry. The programme of work is designed around three specific problem areas, environment, mining and strata control. Investigations within the environment problem relate mainly to safety and health, while work on the mining problem is concerned with the efficiency of mining equipment and systems. Aspects covered by the strata control problem area include safety, as in the control of ground movements of underground workings, and efficiency, which is defined as the better utilisation of coal reserves.

1986-01-01

171

Evaluation of underground coal mining parameters of former western Canadian coal mines for future mining reference  

Energy Technology Data Exchange (ETDEWEB)

The present energy shortage has indicated that coal will be a major source of fuel for power and heat during the next century. The coal resources of western Canada are large and, if mined and used efficiently, should help to make the area energy rich. The physical characteristics of these coal resources vary widely from east to west in quality, from lignite and sub-bituminous to semi-anthracite; in geologic setting from flat seams under shallow depths of cover on the eastern plains to deep pitching seams disturbed by mountain building tectonics. The Alberta Mines Branch have indexed the Alberta coal mines by number amounting to over 1700 and British Columbia Mines Branch also lists a large number of mines. Only a few mining companies have operated from the turn of the century to the present times and these with major changes. Most of the companies worked for short periods of time and then stopped. They mined coal from a variety of geological conditions, met with success or failure in solving their mining problems and closed for numerous reasons. The experiences of the former mines in dealing with their troubles should be of value to future operations despite more modern mining methods.

Grant, F.

1982-03-01

172

Coal mining in India (history and perspectives)  

Energy Technology Data Exchange (ETDEWEB)

This paper presents the geology of India's coal deposits and the development of the Indian coal industry since its inception in the early nineteenth century, including its organisation and economics, mining technology development, capital and labour, mining education and legislation, industrial relations, coal preparation and utilization, environmental problems, welfare activities, research and transport.

1984-01-01

173

Methane in German hard coal mining  

Energy Technology Data Exchange (ETDEWEB)

Worldwide, hard coal mining is being carried out at ever increasing depth, and has, therefore, to cope with correspondingly increasing methane emissions are caused by coal mining. Beside carbon dioxide, chloro- fluoro-carbons (CFCs) and nitrogen oxides, methane is one of the most significant `greenhouse` gases. It is mainly through the release of such trace gases that the greenhouse effect is brought about. Reducing methane emissions is therefore an important problem to be solved by the coal mining industry. This paper begins by highlighting some of the fundamental principles of methane in hard coal mining. The methane problem in German hard coal mining and the industry`s efforts to reduce methane emissions are presented. The future development in German hard coal mining is illustrated by an example which shows how large methane volumes can be managed, while still maintaining high outputs at increasing depth. (author). 7 tabs., 10 figs., 20 refs.

Martens, P.N.; Den Drijver, J. [Rheinisch-Westfaelischer Technische Hochschule, Aachen (Germany)

1995-12-31

174

Methane in German hard coal mining  

International Nuclear Information System (INIS)

[en] Worldwide, hard coal mining is being carried out at ever increasing depth, and has, therefore, to cope with correspondingly increasing methane emissions are caused by coal mining. Beside carbon dioxide, chloro-fluoro-carbons (CFCs) and nitrogen oxides, methane is one of the most significant 'greenhouse' gases. It is mainly through the release of such trace gases that the greenhouse effect is brought about. Reducing methane emissions is therefore an important problem to be solved by the coal mining industry. This paper begins by highlighting some of the fundamental principles of methane in hard coal mining. The methane problem in German hard coal mining and the industry's efforts to reduce methane emissions are presented. The future development in German hard coal mining is illustrated by an example which shows how large methane volumes can be managed, while still maintaining high outputs at increasing depth. (author). 7 tabs., 10 figs., 20 refs

1995-01-01

175

A mathematical programming approach for scheduling equipment in a surface coal mining operation  

Energy Technology Data Exchange (ETDEWEB)

A mathematical programming model for scheduling open pit mining was developed and validated using data from a surface mining operation. A two-phase solution procedure was used involving repeated evaluations of an integer scheduling model and a simple transportation model. 9 refs., 3 figs., 7 tabs.

Goodman, G.V.R.; Sarin, S.C.

1988-12-01

176

Thirtieth conference of coal mining engineers  

Energy Technology Data Exchange (ETDEWEB)

Proceedings are presented of a conference covering many aspects of coal mining including strata control, mining equipment, transport, methane and ventilation, drilling, monitoring and equipment installation. Twenty articles are abstracted separately.

1981-01-01

177

Spontaneous combustion of coal and mine fires  

Energy Technology Data Exchange (ETDEWEB)

The book considers the mechanism of and remedy to the spontaneous combustion of coal using a multidisciplinary approach based on global research and development. The relationship between combustion mechanisms and coal category, risk estimation and preventive measures is discussed as well as the cause of both endogenous and exogenous fires in underground coal mines, methods of detection and monitoring, measures to contain and control fires in different situations and fire hazards in metal mines and surface coal stacks. Topics covered are: mechanism of spontaneous combustion of coal, categorisation of coals in respect of susceptibility to spontaneous combustion; spontaneous fire risk and preventive measures; detection and assessment of heating in a mine; gas hazards and analytical methods; fire combating in underground coal mines; dealing with long-standing underground fires; surface fires; exogenous fires and fires in metal mines.

Banerjee, S.C.

1985-01-01

178

The Rocky Mountain Coal Mining Institute  

Energy Technology Data Exchange (ETDEWEB)

The theme of the 1993 Rocky Mountain Coal Mining Institute Meeting was [open quotes]producing productivity.[close quotes] Papers were presented at the meeting that dealt with worker productivity, improved technology for increased productivity, optimizing productivity, new cost blasting technology, advances in conveyer technology, battery-powered face haulage, high wall mining, stress analysis in coal mines, safety programs, and best mining practices. A separate abstract was prepared for each paper for the data base.

Finnie, D.G. (ed.)

1993-01-01

179

China Coal and Mining Expo 2005  

Energy Technology Data Exchange (ETDEWEB)

An overview is given of 17 leading manufacturers at the China Coal and Mining Expo 2005 Beijing. This accompanies a series of seven articles on many aspects of the coal industry written in Chinese (pp 1-33 suppl).

NONE

2005-09-01

180

Fire prevention system in Velenje coal mine  

Energy Technology Data Exchange (ETDEWEB)

The control of endogenous fires (where coal is prone to spontaneous combustion) to the Velenje lignite coal mine in Slovenia is described. The paper discusses both fire detection and prevention. 1 ref., 2 figs.

Dervaric, E.; Kemperle, C.; Hace, M. [Velenje Coal Mine (Slovenia)

1994-12-31

 
 
 
 
181

Approximate distribution of methane emission from mined coal. [From mined coal during mine haulage  

Energy Technology Data Exchange (ETDEWEB)

This paper analyzes approximate distribution of methane emission from mined coal being hauled by conveyors along the face and in the haulage road. It is assumed that the coal shearer loader mines coal moving in two directions and the direction of coal haulage is opposite to the direction of the air current ventilating the face. It is also assumed that coal haulage has a continuous character and the methane emission has a dynamic character defined by a formula. On the basis of these assumptions formulae were derived which permit methane concentration to be determined at any point of the coal haulage route (location of the coal combine is a further necessary condition). Assuming that the direction of coal mining by a combine is opposite to the direction of the air current, methane quantity in a unit of air is described by a formula for points located in the haulage road, and by another formula for points located at the coal face. When the direction of coal mining is identical with the direction of face ventilation methane concentration in both cases is defined by a further formulae. (6 refs.) (In Polish)

Drzezla, B.; Badura, H.

1980-01-01

182

Servicing mining machines of the Borshod coal mines  

Energy Technology Data Exchange (ETDEWEB)

The issues of servicing mining machines both from the point of view of cost, as well as the reliability of extraction are the most important issues in the current position of mechanization and concentration of coal extraction. The principles used for controlling the existing servicing at the enterprises of the Borshod coal mines are shown.

Bodnar, J.; Bodrogi, B.; Csutak, F.

1983-01-01

183

The coal mining industry of South Africa  

Energy Technology Data Exchange (ETDEWEB)

After presenting a brief history of development of coal mining in South Africa together with a table of coal sales since 1885 the country's coal reserves are discussed. Brief description is given of the mining methods used viz: bord and pillar, opencast, longwalling and pillar extraction or stooping. Figures are given for the size of major production fields, employment in the mines and distribution of coal trade (for export, transport, electricity etc.). Other aspects of the industry discussed and safety (with comparison of fatalities with other coal producing countries); environmental management, manpower and administrative and commercial aspects. 18 refs., 15 figs., 8 tabs.

Sealey, A. (Rand Mines Ltd. (South Africa))

1991-10-01

184

Methane emissions from Polish coal mining  

Energy Technology Data Exchange (ETDEWEB)

The paper describes the method of evaluation of methane emissions from underground coal mining, as a function of methane content. The data on methane content in existing boreholes were used to define the relationship between methane content and depth for identified regions of coal exploitation. On the basis of this relationship and the depth of exploitation of each particular coal mine, the average methane content of each coal mine was estimated. The statistical dependencies between the average methane content and release factor (i.e., the amount of methane released during exploitation of a certain tonnage of coal) were established. 4 refs., 4 figs., 1 tab.

Gawlik, L.; Sumala, W.; Grzybek, I. [Polish Academy of Sciences, Gliwice (Poland). Mineral Energy Economy Research Centre

1995-08-01

185

Sheerness a new coal mine for Alberta  

Energy Technology Data Exchange (ETDEWEB)

Luscar`s new surface coal mine, the Sheerness Mine, near Hanna, Alberta went into full production in mid-1995. The mine is operated by a Luscar subsidiary, Forestburg Collieries (1984) Ltd. The design capacity of the Sheerness Mine is up to 2.1 million tonnes of subbituminous coal per year to supply the adjacent Sheerness Generating Station under a 30-year contract. The construction phase, some major equipment purchases, and construction of mine facilities are described. The mine has come into production six months ahead of schedule and under budget. Some of the areas where savings were achieved are discussed. 2 figs.

Haddock, J.K. [Forestburg Collieries (1984) Ltd., Forestburg, AB (Canada)

1996-12-31

186

FY 2000 international exchange project on exchanges of engineers - Coal mine technology field. Overseas workshop (Indonesia); 2000 nendo gijutsusha koryu jigyo (tanko gijutsu bun'ya) kokusai koryu jigyo. Kaigai workshop (Indonesia)  

Energy Technology Data Exchange (ETDEWEB)

For the purpose of making effective technology exchanges and surveying levels of technology in Indonesia and the needs and possibilities of technology transfer from Japan, workshop was held in Jakarta city on March 1, 2001. Subjects were the following seven: subjects on coal resource and technical strategy in the 21st century, challenge in coal development in Indonesia, geological structure survey at Tanjung Enim coal mine, waste water treatment in Indonesia, outlook for underground mining coal mines, joint research on the centralized monitoring system, and introduction of the optimum high wall coal mining system into open pit mining coal mines in Indonesia. The coal production amount in Indonesia was 75 million tons, and the domestic demand was 22 million tons. Japan imported 14 million tons from Indonesia. In coal mines in Indonesia, most of the coal preparation plants have no waste water treatment facilities. Considering that waste water treatment facilities are necessary for the plants in future, the joint research was made on the simple coal preparation waste water treatment system. (NEDO)

NONE

2001-03-01

187

Coal Mining in Southern Illinois  

Science.gov (United States)

After graduating from high school in 1936, C. William "Doc" Horrell received a $12 camera from his mother. Horrell was immediately bitten by the photography bug, and created a dark room in his mother's walk-in-closet. He attended Southern Illinois Normal University (now the Southern Illinois University Carbondale), and after his time in the armed services, he opened up his own photography studio in Anna, Illinois. In the 1960s, Doc began wandering around southern Illinois to document the region's coal mining industry. Over the next few years, he took thousands of photographs, some of which formed the heart of his 1973 book, "The Land Between the Rivers". The good folks at SIU Carbondale have created this online exhibit to introduce users to Horrell's work. Visitors can make their way through the exhibit, and they may find themselves gravitating to the complete online collection, which contains over 750 items. It's a tremendous find, and it includes images of abandoned coal mining facilities, men at work, and coal trains.

188

Coal Mining Research Centre, Japan: review 1983  

Energy Technology Data Exchange (ETDEWEB)

The Coal Mining Research Centre is involved in the development of technology, performance of pilot and full scale tests, and the rationalization of coal mining. Details of expenses are presented along with a listing of research projects under way. (In English)

1983-01-01

189

Importance of terrestrial photogrammetry for coal mining  

Energy Technology Data Exchange (ETDEWEB)

Examples from the Ruhr, the Helmstedt region, Australia and Sardinia show how terrestrial photogrammetry has become an important aid in prospecting, exploration and exploitation of brown coal and hard coal both in underground mines and open-cast mines and in tectonically simple or complex rock strata.

Adolf, R.E.; Luetge, H.H.; Walter, H.A.

1985-12-01

190

Photogrammetry in USSR coal mining  

Energy Technology Data Exchange (ETDEWEB)

The paper describes the application of photogrammetry in Soviet coal surface mines. Terrestrial stereo-photogrammetry is employed in 5 large surface mines with measurement distances up to 3,000 m. Formulae are given for calculating base distances and correction factors for graphic mapping of these large distances. Interpretation of photogrammetrical pictures is carried out with the 1318 EL stereoautograph or with the Technocart equipment, both produced by Carl Zeiss Jena. Aerial photogrammetry is employed in the majority of surface mines. Flights are conducted once or twice a month. Snow does not interfere with the interpretation of photographs, because excavation lines and edges can be clearly distinguished. Mine surveying departments update maps in scales of 1:1,000, 1:2,000, 1:5,000 and 1:10,000. The Topocart-Orthophot differential rectification apparatus for aerial photographs, made by Carl Zeiss Jena, is planned to be employed for survey interpretations. Photogrammetry is further applied for measuring ground subsidence damage to buildings in the Donets region. (6 refs.)

Zabrodin, G.V.; Trunin, A.P.; Fomicev, L.V.

1982-01-01

191

Restructuring of coal mining industry of Russia  

Energy Technology Data Exchange (ETDEWEB)

The `Rosugol` open joint-stock coal company, in cooperation with scientists, joint-stock management and administration of the coal-producing regions have prepared two documents: `Conceptions of the restructuring of the coal mining industry in Russia`, and `Main headlines for the restructuring of the coal industry in Russia`. The first stage of restructuring (1993-94) envisaged the creation of adequate conitions and socio-economic environment to implement the structural transition - this task has been fulfilled. The second stage (1995-2000) envisages the radical transformation of the production and social spheres and efficient economic regulation of coal production in a market economy. Unprofitable and dangerous coal mines have been closed, under the control of the Rosugol Coal Company and new profitable coal deposits are being developed, with federal subsidies. The article mentions the opencast mines and collieries under construction and operation. Labour productivity rose by 16% between 1994 and 1996.

Malyshev, J.N. [Rosugol (Russian Federation)

1997-12-31

192

Restructuring the coal mining industry of Hungary  

Energy Technology Data Exchange (ETDEWEB)

The Hungarian coal mining industry contributes 2% of the country's GNP and employs 2% of its workers. The British Mining Consultants Ltd. and the International Economic and Energy Consultants Ltd. prepared suggestions for transition of the industry to a market economy. Elements of the transition concept include: profitable coal mines will continue operation as government owned or joint venture companies. Coal prices will be increased to price levels of international coal markets. The transition concept takes into account the social and political environment, the limitations of the electric power industry, limited investment capacity, etc. Various recommendations are made.

Moore, P. (International Economic and Energy Consultants Ltd. (United Kingdom))

1992-01-01

193

Kuyasa mining to produce more coal  

Energy Technology Data Exchange (ETDEWEB)

With plans to become a larger player in the coal industry in the sub-continent, Kuyasa Mining has already reached an advanced stage in negotiations for the takeover of Zambia's ailing Maamba Colliery. Now, in a further development, Kuyasa Mining was invited to purchase the No 4 seam mining operation at Delmas Colliery, 100 km east of Johannesburg. 3 photos.

Birtles, A.

2002-10-01

194

Injury experience in coal mining, 1984  

Energy Technology Data Exchange (ETDEWEB)

This report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1984. 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.

1986-01-01

195

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

Energy Technology Data Exchange (ETDEWEB)

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

Knoedel, K.; Koenig, F.

1999-06-15

196

Workers, owners and politics in coal mining  

Energy Technology Data Exchange (ETDEWEB)

Contains 8 chapters by various contributors. The chapters have the following titles: on the history of industrial relations in mining; employers, trade unions and the state, 1889-1987: the origins and decline of tripartism in the British coal industry; labour relations in American coal mining: an industry perspective; entrepreneurial politics and industrial relations in mining in the Ruhr region: from managerial absolution to co-determination; industrial relations in the Belgian coal industry since the end of the nineteenth century; industrial relations in French coal mining from the late nineteenth century to the 1970s; good-bye to class war: the development of social partnership in Austrian coal mining; industrial relations in the coal industry in twentieth-century Europe and the USA: a historical and comparative perspective. Statistics on production and employment in western coal mining during the twentieth century and a synopsis of the development of industrial relations in western coal mining since the end of the nineteenth century are given in two appendices.

Feldman, G.D.; Tenfelde, K. (eds.)

1990-01-01

197

On steep coal seam mining method. 1  

Energy Technology Data Exchange (ETDEWEB)

At Sorachi Colliery, coal getting operations are made by the `diagonal saw-tooth shaped mining method` (hereafter referred as `Kakuchi` mining method). `Kakuchi` mining method is the most suitable method to this colliery which has been operating the coal getting in multiple seams, and this method is advantageous in dealing with changes in the coal seam thickness and small faults. The merit of the `Kakuchi` mining method is the safe and efficient coal getting in the steep coal seams, as well as the cost saving in the acquisition and maintenance of the space, and also in the relating cost for preventing the injury caused by mining operation. Each `Kakuchi` (each saw tooth) is set at about 15 to 20 meters interval. After the `Kakuchi` is shaped the coal getting operations start by a team of two workers (a coal-hewer and a putter). Their operations last for 8 hours during which 4 to 6 cycles of works comprising preparation of materials, boring, blasting and conveyance of mined coal. When small faults exist or when the roof supporting of the upper air heading is difficult, adapting small thirds of funnels are constructed. After the coal getting operations, the goaf must be filled. A team of filling operation consists of 5 workers per one working face. 3 figs., 2 tabs.

NONE

1994-03-01

198

The practical considerations regarding coal mine rehabilitation and closure  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Coal mine closure is an important subject for the coal mining industry and the community within SA. The coal mine closure process begins with planning during the project feasiblility assessment phase and concludes with the surrender of tenure. Where a coal mine has not developed a closure plan, earl...

De Beer, Abri

199

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

Energy Technology Data Exchange (ETDEWEB)

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 developed during the project is considered satisfactory, therefore we don't consider necessary to prosecute the research in this field. The methodology could be used in the future for looking for suitable rubbish dumps in other mining areas, especially when no other adequate locations are available, even though such need is not apparent by now. (Author) 10 refs.

NONE

2000-07-01

200

Methods of planning coal output from a coal face in coal mines  

Energy Technology Data Exchange (ETDEWEB)

This paper reviews regulations which form the basis for calculating coal output from a coal face in existing coal mines in the USSR. It is noted that the regulations are characterized by shortcomings, and the real coal output from a coal face often differs significantly from the predicted one. The situation in the Voroshilovgradskaya coal mine is cited, where planned coal output per coal face was 1200 to 1400 t/24 h, and in reality the output was only 390 t/24. As a result of incorrect prediction of coal output per coal face the forecasted coal output of the whole mine was also not achieved. It is suggested that shortcomings in the existing methods of predicting coal output per face are caused by the absence of a method of complex determination of coal output, permissible under existing mining-geological conditions. To create the theoretical basis for calculating coal output per face in existing mines and new levels in existing mines two mining institutes, VNIIUuglya and IGD im.Skochinski, are developing a computer program. Comparison of the coal output per face in the existing mines with coal output possible under the mining-geological condition will be a valuable way of evaluating organization of work and work efficiency.

Shramko, V.M.

1980-07-01

 
 
 
 
201

Injury experience in coal mining, 1992  

Energy Technology Data Exchange (ETDEWEB)

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.

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

1994-05-01

202

Hospitalization patterns associated with Appalachian coal mining  

Energy Technology Data Exchange (ETDEWEB)

The goal of this study was to test whether the volume of coal mining was related to population hospitalization risk for diseases postulated to be sensitive or insensitive to coal mining by-products. The study was a retrospective analysis of 2001 adult hospitalization data (n = 93,952) for West Virginia, Kentucky, and Pennsylvania, merged with county-level coal production figures. Hospitalization data were obtained from the Health Care Utilization Project National Inpatient Sample. Diagnoses postulated to be sensitive to coal mining by-product exposure were contrasted with diagnoses postulated to be insensitive to exposure. Data were analyzed using hierarchical nonlinear models, controlling for patient age, gender, insurance, comorbidities, hospital teaching status, county poverty, and county social capital. Controlling for covariates, the volume of coal mining was significantly related to hospitalization risk for two conditions postulated to be sensitive to exposure: hypertension and chronic obstructive pulmonary disease (COPD). The odds for a COPD hospitalization increased 1% for each 1462 tons of coal, and the odds for a hypertension hospitalization increased 1% for each 1873 tons of coal. Other conditions were not related to mining volume. Exposure to particulates or other pollutants generated by coal mining activities may be linked to increased risk of COPD and hypertension hospitalizations. Limitations in the data likely result in an underestimate of associations.

Hendryx, M.; Ahern, M.M.; Nurkiewicz, T.R. [West Virginia University, Morgantown, WV (USA). Dept. of Community Medicine

2007-07-01

203

The Bullmoose Mine project  

Energy Technology Data Exchange (ETDEWEB)

The Bullmoose Mine is currently under construction in the North East Coal area of British Columbia, and approximately $300 million will be spent to bring this 2.3 million-tonnes-per-year metallurgical and thermal coal mine into production by December 1, 1983. The project is an unincorporated joint venture undertaking, with Teck-Bullmoose Coal Inc., a wholly-owned subsidiary of Teck Corporation, holding 51%, Lornex Mining Corporation holding 39%, and Nissho-Iwai (Canada) Ltd. holding 10%. Bullmoose Operating Corporation will be the manager and operator of the project. This paper covers the history and exploration work on the property, the geology, open-pit mining plans and equipment, the preparation plant flowsheet from breaker station to clean coal silo, the 35 km highway truck haul, the railroad loadout system, manpower requirements, construction progress, approvals and permits, and general financial arrangements.

Drozd, R.

1983-05-01

204

Intensifying coal mining in the Neryungri surface mine  

Energy Technology Data Exchange (ETDEWEB)

Surface mining of coking coal in the Neryungri mine of the Yakutugol' association in Siberia is discussed. Coal output of the mine should increase to 7 Mt/year. Three mining areas are developed: the South-West, the West and North-West. Mining conditions in the South-West are most complicated (increased overburden thickness, reduced coal seam thickness, higher dip angles of coal seams, overburden to coal ratio 3 times higher than in the Neryungri mine). Effects of bench dimensions and working flank inclination on overburden removal are analyzed. Recommendations for reducing overburden removal are made. Comparisons show that mine development should concentrate in the North-West and the West areas whereas development of the South-West should be stopped. Overburden removal is reduced by increasing angle of inclination of working flanks to 15 degrees, increasing bench height to 20 or 25 m and reducing bench width. When these recommendations are followed overburden removal can be reduced by 85 to 100 million m/sup 3/ (down from 184 million m/sup 3/) per year.

Novikov, V.V.; Tkach, S.M.; Deryabin, A.A.

1985-06-01

205

Impact of coal mining on mine water quality  

Energy Technology Data Exchange (ETDEWEB)

The coal mining industry has to dispose of millions of litres of water every day. This water forms main source of various water supplies in the thickly populated coalfields. In this study, water samples from major coalfields were collected and analysed in an attempt to reflect the impact of mining on water quality in these areas. Various physico-chemical characteristics of mine waters as analysed include pH, alkalinity/acidity, specific conductivity, hardness, total solids, sulphate, chloride iron and trace materials. This investigation reveals that mining activity, markedly pollutes the mine water. Mine waters are of highly complex nature and of widely varying composition. These are nearly neutral, alkaline, mildly acidic and highly acidic in nature. Special emphasis on water quality deterioration due to acid mine drainage which results in significant concentration levels of trace (toxic) metals, is given. A classification of these mine waters is also made. 9 refs., 7 tabs.

Singh, G.

1988-09-01

206

Program for dust in coal mines  

Energy Technology Data Exchange (ETDEWEB)

At the request of NACMMR (National Advisory Committee on Mining and Metallurgical Research) the airborne dust problems (health) in mines are briefly reviewed and a program for CANMET proposed. Dust control research in Europe and the U.S.A. is far advanced and the essential application of principles discovered to the development of a new generation of coal mining machines is in progress. It is suggested that E.M.R. be involved in technology transfer from abroad to Canadian coal and potash mines. A five-year program is outlined as well as definite proposals for contract research in 1980-81.

Knight, G.

1980-01-01

207

Controlling spontaneous combustion in surface coal mines  

Energy Technology Data Exchange (ETDEWEB)

The Witbank Coalfield in South Africa has historically been mined out using the bord-and-pillar method, with typically low coal-recovery ratios, leaving significant amounts of coal in pillars and as floor and roof coal. These pillars are being re-extracted by underground and surface mining methods. During surface mining, air enters through the cracks and bords into the old workings, causing spontaneous combustion of coal. Over the long term, air will also enter the old underground bord-and-pillar workings at shallow depth through sinkholes caused by bord collapse underground. The resulting environmental problems may necessitate future rehabilitation at great cost. Existing knowledge about spontaneous combustion in opencast collieries indicates that there is no typical fire and certainly no standard technique for preventing it from happening. However, with current measures it is possible to control the spontaneous combustion of coal in opencast collieries. A project supported by Coaltech 2020, a South African coal mining Collaborative Research Programme, has been completed to develop methods for minimising and controlling spontaneous combustion in old workings by surface mining methods and applications. However, the findings and recommendations of this study, which focused on the Witbank Coalfield, can be adapted to other surface coal mines. 11 figs.

Eroglu, N.

2005-07-01

208

Evaluation on differential costs of coal mines  

Energy Technology Data Exchange (ETDEWEB)

The problem of differential costs has long been existing in the coal industry, hindering the fair competition among enterprises. Starting with the analysis of various geological factors which have caused differential costs, quantitative analysis on the differential conditions of enterprises is made by using stratified analysis and fuzzy evaluation. Regression analysis is utilized to derive the correlation between mine differential conditions and coal production costs and obtain the prediction model in order to quantify the differential costs of coal mines. Thus once the coal enterprise has entered the market, it is convenient for the governing authorities to carry out macro-control and grouped guidance. 1 ref., 1 fig., 3 tabs.

Cao, Z. [Central Coal Mining Research Institute (China). Beijing Research Institute of Economy

1995-06-01

209

Injury experience in coal mining, 1991  

Energy Technology Data Exchange (ETDEWEB)

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.

1991-12-31

210

Energy efficiency of coal mining in the Donbass  

Energy Technology Data Exchange (ETDEWEB)

Selected aspects are evaluated for investment in underground coal mining in the Donbass, in construction of new coal mines and in modernization of existing mines. Earning capacity of underground mining is determined by comparing amount of energy produced by combustion of 1 t of coal from a new mine or a new mining level to energy consumption associated with underground mining (including energy consumption during production of materials and equipment used in coal mines), coal preparation and transport of 1 t of coal. When earning capacity measured by this relation in a new mining level is lower than that of the whole mine, construction of the new mining level is not economic. Earning capacity of mining in the Donbass measured by a relation between energy produced and energy consumed by underground mining is in general low and amounts to 6.6 kWh/1 kWh. The relation has a deteriorating tendency.

Rzhevskii, V.V.; Galutskii, G.M.

1984-11-01

211

Acquiring capital funds for coal mining  

Energy Technology Data Exchange (ETDEWEB)

Because of the unique mix of financial and technical risk in a mine project, the domestic coal industry requires a diverse selection of financial arrangements. Commercial banks, offering the widest variety of loans, are employed most often to meet this demand. Of the various arrangements offered by commercial banks, the term and project loans are selected most often. The wide use of these two programs is attributed to their adaptability in financing many different types of coal mining projects. Consequently, the mine operator has more available financing alternatives by dealing with a bank. In seeking capital financing, the coal mine operator then must deal with several problems. High interest rates and market uncertainty are the most pressing. Without some indication of future coal sales, lenders are hesitant to enter into a loan agreement. Lack of equity and high initial capital investment, largely due to government environmental regulations, further complicates the capital funding acquisition process.

Brooks, W.A.; Hursh, D.S.

1982-09-01

212

Coal industry of Thailand  

Energy Technology Data Exchange (ETDEWEB)

The article illustrates the need for Thailand to make use of potential domestic energy resources, with data on the gross domestic product, economic growth, and in balance of trade, as well as Thailand's gross energy consumption over the last decade. Government policy aimed at reducing Thailand's dependency on imported oil by encouraging the use of coal is reviewed; the Mah Mon Mine, with a projected tonnage making it one of the world's largest open pit mines is described. Also covered are coal reserves, production, imports, end use markets and future plans.

1987-01-01

213

Selenium transformation in coal mine spoils  

Energy Technology Data Exchange (ETDEWEB)

The objective of this part of the study is to investigate the oxidation-reduction (redox) environment that favor the release of selenium from coal mine spoils. It is anticipated that the study will help answer critical questions as to the form, solubility, and mobility of selenium from the spoil site to the surrounding environment. This investigation will evaluate the conditions which favor the speciation of selenium from coal mine spoils as affected by changes in the oxidation states of selenium.

Atalay, A.; Koll, K.J.

1990-09-01

214

International opportunities to reduce coal mine methane  

International Nuclear Information System (INIS)

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

1993-01-01

215

Mining adjacent inclined coal seams of varying thickness  

Energy Technology Data Exchange (ETDEWEB)

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

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

1980-01-01

216

Remote controlled high wall coal mining system  

Energy Technology Data Exchange (ETDEWEB)

A high wall mining system including a continuous mining machine is claimed. The system consists of a remote control station outwardly of the high wall from which extend electric cables wound on cable reels which extend to the continuous mining machine enabling the operator to control the machine based upon television pictures transmitted to the control station from television cameras on the machine, and the signals from laser and sonar guidance systems provided at the control station in cooperation with elements on the continuous mining machine, and an extensible and retractable vacuum air conveyor system for the coal recovered by the mining machine.

Apt, J.J.; Dury, J.D.; Lansberry, J.B.

1982-04-06

217

Coal mining technology at surface coal mines. Tehnologija dobivanja u povrsinskim rudnicima  

Energy Technology Data Exchange (ETDEWEB)

Gives a general description of development in Czechoslovak and other surface coal mines using either continuous or discontinuous coal mining. Particular attention is paid to the development of surface coal mining in the North Bohemia brown coal basin, the largest coal supplier of Czechoslovakia (current production is 73 Mt/a, 80 Mt/a should be produced by 1990). Achievements of the Czechoslovak mining machinery manufacturing plants in construction of shovel excavators, bucket wheel- and bucket chain excavators, belt conveyors, stackers and crushers are considered and briefly outlined. Technical features and application of the following bucket chain- and bucket wheel excavators are presented: the KU 300, KU 2000, RK 400 and RK 500. The application of Czechoslovak excavators for the removal of overburden and for coal excavation in various mining conditions in combination with continuous and discontinuous haulage equipment, crushers, stackers and drill rigs as well as other accessory mechanization is also described. This description is completed by examples from FRG (the Fortuna surface coal mine), Spanish (the Puentes de Garcia Rodriguez coal mine) and Australian (the Ulan surface coal mine) practice.

Kalat, J.

1988-01-01

218

Spoil pile instabilities with reference to a strip coal mine in Turkey: mechanisms and assessment of deformations  

Science.gov (United States)

With the increasing adoption of the surface mining of coal, problems associated with spoil pile instability, which affects resource recovery, mining cost, and safety and presents environmental hazards, have become a matter of prime concern to mine planners and operators. The study of geotechnical aspects is thus very important in the rational planning for the disposal, reclamation, treatment and utilization of spoil material. A strip coal mine, one of the largest open pit mines in Turkey, is located in Central Anatolia and provides coal to a thermal power station. Coal production is carried out in two adjacent open pits, the Central Pit and South Pit. A large-scale spoil pile instability over an area of 0.3 km2 occurred within the dumping area of the Central pit. In addition, small-scale movement occurred in the outside dumping area. This paper outlines the results of field and laboratory investigations to describe the mechanisms of the spoil pile instabilities and to assess deformations monitored over a long period following the failure. Shear test results indicate that the interface between the floor and spoil material dumped by dragline has a negligible cohesion and is the most critical plane of weakness for spoil pile instability. Back analyses based on the method of limit equilibrium and the numerical modelling technique, and observations in the pit revealed that failure occurred along a combined sliding surface consisting of a circular surface through the spoil material itself and a planar surface passing along the interface between the spoil piles and floor. The analyses also indicated that pore water pressure ratios of about 0.25 satisfy limiting equilibrium condition and that rainfall about one month before the failure may be a contributing factor to the instability. Movement monitoring data obtained following the failure over a 1.5-year period suggested that the ongoing deformations were mainly due to compaction of the spoil material. Based on the monitoring data and the results of the analyses, the failure mode of the local instability occurring at the outside dumping area was considerably similar to that of the large instability.

Kasmer, Ozgu; Ulusay, Resat; Gokceoglu, Candan

2006-02-01

219

U. S. coal mine safety performance  

Energy Technology Data Exchange (ETDEWEB)

Reports that few real gains have been made in recent years in either the fatal or nonfatal disabling injury frequency rates, despite the fact that federal and state inspectors are conducting thousands of inspections in coal mines each year. An analysis of the available data indicates that there has been no statistically significant change in the number of deaths in US coal mines for any of the last 10 years. On the contrary, because total production has increased during this period, and the proportion of coal mined underground has decreased, the fatal injury frequency rate (per million tons of coal mined) has actually decreased. Emphasizes that any meaningful discussion of safety performance data must first recognize that there are uncertainties in the accuracy of the available data, and that no single measure is adequate to characterize the performance of an entire industry. Finds that the downward trend established between 1940 and 1969 has continued on into the 1970s and 1980s, with no radical improvement in this trend in 42 yrs. Concludes that an analysis of the available coal mine safety data for 1940-1981 indicates that the time has come to reassess our entire coal mine safety program.

Zabetakis, M.G.; Zalan, J.L.

1982-07-01

220

78 FR 48593 - Refuge Alternatives for Underground Coal Mines  

Science.gov (United States)

...1219-AB79 Refuge Alternatives for Underground Coal Mines AGENCY: Mine Safety and Health Administration...than the existing rule during underground coal mine emergencies. The Agency continues...reiterate that in the event of an underground coal mine emergency, a miner should seek...

2013-08-08

 
 
 
 
221

78 FR 48591 - Refuge Alternatives for Underground Coal Mines  

Science.gov (United States)

...75 Refuge Alternatives for Underground Coal Mines; Proposed Rules Federal Register...1219-AB84 Refuge Alternatives for Underground Coal Mines AGENCY: Mine Safety and Health Administration...use refuge alternatives in underground coal mines. The U.S. Court of Appeals...

2013-08-08

222

FUGITIVE DUST FROM WESTERN SURFACE COAL MINES  

Science.gov (United States)

Field measurement of fugitive dust levels were made 250 to 500 meters downwind of mining activities and areas at four surface coal mines in the Northern Great Plains during three different climatic conditions. Ambient dust levels were also monitored. Wide ranges of temperature, w...

223

Radio communications criteria for Australian coal mines  

Energy Technology Data Exchange (ETDEWEB)

The authors consider the types of radio communication in use in overseas mines and conclude that propagation at frequencies in the UHF range (470 MHz and above) offers the most promise, with leaky coaxial cable systems as a possibility for some applications. Research being undertaken in New South Wales to determine design criteria for systems suited to coal mines in the State is outlined.

Munro, J.

1983-11-01

224

Disaster prediction of coal mine gas based on data mining  

Energy Technology Data Exchange (ETDEWEB)

The technique of data mining was applied to predict gas disasters in view of the characteristics of coal mine gas disasters and feature knowledge based on gas disasters. The rough set theory was used to establish a data mining model of gas disaster prediction, and rough set attributes relations were discussed in a prediction model of gas disaster to supplement the shortages of the rough intensive reduction method by using information entropy criteria. The effectiveness and practicality of data mining technology in the prediction of gas disaster is confirmed through practical application. 7 refs., 11 tabs.

Shao, Liang-shan; Fu, Gui-xiang [Liaoning Technical University, Fuxin (China)

2008-09-15

225

A community welcomes a coal mine  

Energy Technology Data Exchange (ETDEWEB)

Nanaimo, British Columbia, which has strong environmental interest groups, recently supported the underground coal mine proposed by the Wolf Mountain Coal Company. A case study is presented that outlines a simple and economical process by which public concerns were identified early, dealt with directly and resulted in active support, even from a leading environmental group.

Connor, D.M.; Svendsen, A.C.

1983-09-01

226

Roofbolting as applied to UK coal mining  

Energy Technology Data Exchange (ETDEWEB)

The practical aspects of roofbolting within UK coal mines are discussed. The various stages in design and installation of a typical roofbolted system are described. The two main areas of roofbolt application within British Coal are roadway development and face salvage, for which the bolting principles are the same although the equipment for drilling and installation of bolts can be different. 16 figs.

Swindale, G.W. (Anderson P.T.T. (UK))

1989-01-01

227

Coal preparation plant of the Krupinski mine  

Energy Technology Data Exchange (ETDEWEB)

The design is described of the coal preparation plant of the Krupinski coal mine constructed in the Rybnik area of the Upper Silesian basin. Designed output of run-of-mine coal amounts to 21,800 t/d, the average ash content in run-of-mine coal amounts to 45%. Grain size distribution is 15% above 70 mm, 67% from 70 to 0.5 mm, 18% from 0.5 to 0 mm. Flowsheets of coal preparation systems used in the plant are shown. The following departments are described: crushing of run-of-mine coal, three-product preparation using OZ 36-D3 jigs, flotation using IZ-12 flotation machines, dewatering using the WOW 1.3 vibration dewatering system, FT-C vacuum filters, radial thickeners and ROW-570 filter presses, drying using ROW-2 drum dryers, storage and coal handling. Coal preparation scheme used in the Krupinski plant is more economic than a system using DISA separators for preparation of grain size from 200 to 20 mm and jigs for preparing grain size from 20 to 0.5 mm (investment is 10% less and operating cost 15% less). Control systems used in the Krupinski plant are reviewed.

Fibich, J.; Solik, W.

1984-01-01

228

Coal quality management at Yallourn Mine  

Energy Technology Data Exchange (ETDEWEB)

The paper discusses what to do at the mine to check when customers report problems due to deterioration in coal quality. This include identifying problem areas in geological model and cross checking the coal face, and that sand contamination from overburden is not occurring.

Richards, H. [Yallourn Energy Pty. Ltd., Yallourn, Vic. (Australia)

1997-12-31

229

The environmental conditions in coal mining regions  

International Nuclear Information System (INIS)

[en] 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

1998-01-01

230

Systems for coal deposit mining without overburden transport  

Energy Technology Data Exchange (ETDEWEB)

Discusses dragline surface mining of black and brown coal: development trends of heavy-duty draglines for coal mines (bucket capacity, total height, ground pressure, maximum reach, digging capacity, cutting depth), draglines manufactured in the USA, UK, USSR, FRG, dragline methods for coal surface mining used in the USA, Australia, the UK and Turkey, schemes for dragline coal mining (dragline position, dragline movement, sequence of dragline operations), effects of dragline surface mining with inner spoil banks on subsequent land reclamation, design of most advanced draglines for coal surface mines (modular design, increased length of dragline boom), economic aspects of dragline use (investment, operating cost, mining cost, land reclamation cost). 26 refs.

Simkin, B.A.; Sidorenko, I.A.; Nevskii, V.L.

1989-01-01

231

Analyzing factors influencing productivity in Yugoslav coal mines  

Energy Technology Data Exchange (ETDEWEB)

The results are outlined for a study made by the Mining Institute of Belgrade on the factors influencing the productivity of Yugoslav coal mines. Data published in the Yearbook of Yugoslav coal mines (published by the Mining Institute of Belgrade) were used. Altogether 34 coal mines (11 open surface casts and 23 underground coal mines) were involved in the study. The main factors influencing productivity are: level of concentration of production, level of technological innovation, miner interest in the work and motivation, level of organization, calorific value of exploited coal, mining conditions.

Perisic, M.; Vujic, J.

1984-01-01

232

Asbestos litigation should concern coal mine operators  

Energy Technology Data Exchange (ETDEWEB)

In asbestos litigation, the products are asbestos-containing products (ACPs). Since coal mines do not generally manufacture ACPs, this theory is ignored. However, all business, including mines, need to be aware of the second theory, premises liability. In asbestos litigation, premises liability addresses party's exposure to asbestos that may have occurred while that party was on someone else's premises. Coal operators should think about the historical presence of ACPs at a mine, first consider pipe insulation then protective clothing made from asbestos.

Gullborg, P.

2002-11-01

233

Mechanization of coal mines of India  

Energy Technology Data Exchange (ETDEWEB)

The production levels in many highly mechanised Indian coal mines are often far below their economic viability. Reasons for this include geological disturbances, lack of spare parts and trained personnel, and bottlenecks in the transport of coal to the surface. In addition, the cost of imported machinery is excessive, and such machinery is often unsuited to Indian geological conditions. The result is that coal cannot compete with oil and gas.

Bagchi, S.

1983-02-01

234

Opencast coal mining in Great Britain  

Energy Technology Data Exchange (ETDEWEB)

This booklet explains all the various measures taken by the Opencast Executive before, during and after excavation has taken place. Also described is the continuing research and development programme being undertaken by the Executive as it seeks to improve its performance. The paper gives a fuller understanding of opencast coal mining, the advanced techniques it employs to minimise environmental disturbance and the important part opencast coal plays in securing the future of the coal industry.

1987-01-01

235

A device for unmanned coal mining  

Energy Technology Data Exchange (ETDEWEB)

The object of the invention is to increase coal mining intensity and to lessen coal loss left in the earth. The said goal is attained in an arrangement whereby the device for unmanned coal mining, which includes two continuous drilling rigs with conveyor flights, between which there is a working tool, contains a working tool shaped like a contour guide and two non-terminating chains with working elements placed on opposite sides of the contour. The conveyor flights are equipped with drive sprockets kinematically connected to the non-terminating chains.

Krasnosel' skii, M.M.

1981-01-01

236

Diagonal bench mining of steep coal seams  

Energy Technology Data Exchange (ETDEWEB)

Trials on mining steep thin and medium thick coal seams less than 2m at an angle of 45-70 degrees with the benching method were made successfully in Gudong coal mine in Zhenjiang City and good techno-economic results were achieved. This paper describes in detail the entry layout in mining sections, mining technology, and selection of related parameters. The main characteristics of this mining method are that the longwall face is divided into several short faces, and when coal is won, one short face is in advance of the next short face and they are kept at fixed distance apart. At the same time, they are connected by inclined headings which are formed in the process of mining, forming an inclined bench. Based on the practical experience obtained in the past few years, this method has the following merits: improved face working conditions and safety in steep coal seams, good adaptability to coal seam occurrence, low timber consumption, high rate of resources recovery, and simultaneous operation of all the short face if necessary, which is useful in increasing face output.

1987-06-01

237

Developments in open-pit machinery  

Energy Technology Data Exchange (ETDEWEB)

Trends in the development of mining equipment used in surface mining for excavation, loading and transport and their applications are discussed. Equipment and methods aimed at reducing energy costs with continuous conveying and trolley-assist trucks are discussed in detail. 6 refs., 2 figs.

Rao, K.R.M.

1987-05-01

238

????????????????? The Building of Environmental Cost System in Coal Mining Enterprise  

Directory of Open Access Journals (Sweden)

Full Text Available ???????????????????????????????????????? ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????Coal resource is China’s main energy. Coal mining enterprises in the coal mining process cause serious, environmental pollution not only in the mining area, but also outside the mining area. Analyze the production characteristics of coal mining enterprise and its requirements for environmental cost accounting. First, the concept and structure of the environmental costs in coal mining enterprises is defined and the environmental costs of coal mining enterprises are divided into six categories, including the costs of natural resources depletion, the cost of environmental prevention, the cost of environmental maintenance, the cost of environmental damage, the cost of environmental improvement and other necessary environmental spending. Second, make a detailed analysis for the recognition, measurement, recording and reporting of the environmental costs of coal mining enterprises. Third, design environmental cost accounting system for coal mining enterprise.

???; ??

2011-01-01

239

Global coal mine methane utilization: promising opportunities  

Energy Technology Data Exchange (ETDEWEB)

The article provides an overview of global coal mine methane (CMM) utilization projects based on US EPA research of publicly available data and industry contacts in 13 countries known to have such projects either currently in operation, in development, or in planning. It summarizes the geographic distribution of CMM projects, the types of coal mine methane gas recovered and specific project end-uses. In some cases, available information indicates that projects are underway in a given country, but no quantitative data are available. Most of the reported projects are inferred to be operational at active mines. Power generation is by far the most extensively employed use for coal mine methane. Other uses are pipeline injection for distribution in natural gas systems, flaring, or as a chemical feedstock or industrial process fuel. 5 figs.

NONE

2005-06-01

240

The legacy of a coal mining past  

Energy Technology Data Exchange (ETDEWEB)

Past extraction techniques have left a legacy of shafts, adits and shallow stoop and room workings which must be considered in terms of land contamination. Until recently, responsibility for the environmental implications of the past mining history rested in the British Coal Corporation. Liability has recently been passed to the Coal Authority. The article discusses the duties of the Coal Authority, and points out that these include responsibility for all potential water pollution problems until licences are granted to mineral operators. Once mining operations cease, the workings will revert to the Coal Authority who will have the right to insist that the mining companies take all reasonable steps to protect the Authority from continuing liabilities.

Lindsey, K.

1994-12-01

 
 
 
 
241

Greenhills coal mine is officially opened  

Energy Technology Data Exchange (ETDEWEB)

Greenhills 300 million-dollar surface mining operation is located in the East Kootenay region of southeastern British Columbia. Production in 1983 will be approximately 1.1-million tonnes and in 1984 will reach its capacity of 2.8-million tonnes. Greenhills' strengths include its long-term contracts, its high quality product, a highly modern and flexible mining operation, and a unique system of participatory management. The mining operation which includes multiple seam mining, coal preparation, long-term contracts, and worker's association are described.

1983-10-01

242

Indonesian coal sector and its future  

Energy Technology Data Exchange (ETDEWEB)

The paper reviews the history of the last 20 year's Indonesian coal industry development and Indonesia's coal potential. It analyses Indonesia's coal production and export and forecasts the future. The paper concludes that although the political situation currently is not quite conductive, the enormous potential of Indonesian coal, suitable open-pit mining conditions, its low sulphur and ash contents and Indonesia's very strategic location, altogether have made development of Indonesian coal prospects still attractive for investment in this sector. 5 tabs.

Prijono, A. [Mining Industry, Jakarta (Indonesia)

2001-06-01

243

Mining induced seismicity in the Ruhr coal mining district, Germany  

Science.gov (United States)

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.

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

2013-04-01

244

Export coal 2002 - mine costs to 2007  

Energy Technology Data Exchange (ETDEWEB)

The costing report for the global export coal industry shows how costs have declined through improved labour productivity, integrated management, decreased freight costs and currency devaluation. The report includes analysis of historical and forecast FOB cash costs of the global export coal industry covering 162 mines in Australia, Indonesia, South Africa, Canada, the United States, Colombia and Venezuela. AME's analysis confirms the significant improvements made by the coal supply industry in recent years, with the new large mines driving the process. A subscription to the report includes electronic access via the AME website to the report and AME Clementine database for export coal with search and filter functions, and a year's support service from a team of coal industrial analysis.

NONE

2002-07-01

245

New solutions in coal mining technology  

Energy Technology Data Exchange (ETDEWEB)

Evaluates a set of machines for mining thin horizontal coal seams by a system of longwall faces. It consists of a K-103 narrow web coal shearer, M-103 powered supports, SP-202V face conveyor and a spraying system. Each of the machines is described and technical specifications are given. The KMT set of mining machines for mining thin, horizontal seams with roofs difficult to cave is also evaluated. It consists of the 1GSH-68 narrow web coal shearer, MT powered supports and the SP-87P face conveyor. The MT powered supports are highlighted. Design of the supports, methods of advancing them and their technical specifications are given. The AK-3 front set of mining machines used for automated mining of steep seams 1.6 m to 2.5 m thick, is also described. It consists of a coal combine powered supports and face conveyor. Economic aspects of using set are evaluated. All mining machines presented were designed by the Giprouglemash firm. (In Russian)

Khorin, V.N.

1980-04-01

246

Export coal 2002 - mine cost to 2007  

Energy Technology Data Exchange (ETDEWEB)

The report evaluates historic trends and forecasts FOB cash costs of the global export coal industry covering 162 mines located in Australia, Indonesia, South Africa, Canada, the United States, Columbia, and Venezuela. AME's analysis confirms the significant improvements made by the coal supply industry in recent years, but predicts that the rate of cost reduction achieved over the past four years is unlikely to be sustained and that future changes will be less dramatic. Other highlights from the report include an examination of transport costs for coal within each of the exporting nations and an overview of currency exchange rates and the affect on the cost of exporting coal.

NONE

2002-07-01

247

Near-source observations from single and multiple cylindrical explosions in a coal mine  

Energy Technology Data Exchange (ETDEWEB)

An experimental study of ground motion from explosions designed to remove overburden in an open pit coal mine is reported. The purpose of this study is a characterization of these ground motions in the distance range of several tens of meters to several kilometers. The investigation has focused upon both single cylindrical sources with different explosive configurations as well as arrays of charges in the production mode. Critical to this study of source configuration and coupling is experimental control of the individual explosions, the timing of the explosions and the geological properties. The height of the explosive I charges, their depth and charge distribution were monitored in the field. High speed photography as well as velocity of detonation measurements were made on the multiple explosion source so that detonation of individual charges could be documented. Different yields of both ANFO and Emulsion explosives were used. Two tests were detonated with an air column or deck directly above the explosive while the remaining six, single shots were backfilled with stemming and drill cuttings. The air decks were designed to investigate proposed enhanced motions from such configurations. Observations were made as close as 50 m and as far as 10 km. This range of measurements allows the coupling of the explosive energy into the body and surface wave component of motion to be quantified and characterized as a function of range. The location of these tests was an active coal mine and so there was the opportunity to recover near-source data from three normal production shots of the mine. These explosions range in total explosive size from 43,500 to 87,077 lbs.

Stump, B.W.; Pearson, D.C. [Los Alamos National Lab., NM (United States); Yang, Xiaoning [Southern Methodist Univ., Dallas, TX (United States). Dept. of Geological Sciences

1994-06-01

248

Environmental impact assessment of selenium from coal mine spoils  

Energy Technology Data Exchange (ETDEWEB)

The development of environmental impact assessment of selenium from coal mine spoils will provide a useful guideline to predict the environmental impact of Se from abandoned coal mine operations. Information obtained from such a study can be applied in areas where coal mining has not yet begun in order to predict and identify the geochemistry of rocks, soils, surface waters and groundwaters likely to be disturbed by coal mining operation.

Atalay, A.

1990-10-01

249

Boys in the pits: child labour in coal mines  

Energy Technology Data Exchange (ETDEWEB)

The rise and fall of child labour in Canadian coal mines is described. Boys worked in every coal mining province. Most were employed in Nova Scotia. Class relations, impact of technical changes, legislation, nature of the adult work force, the mining family economy, mining communities, boys response to their experience, and reform and children's exclusion from Canadian coal mines are discussed. 700 refs., 15 figs., 16 tabs.

McIntosh, R. [National Archives of Canada, Ottawa, ON (Canada)

2000-07-01

250

Coal mining and water quality: Criciuma's case  

International Nuclear Information System (INIS)

The coal mining in the Santa Catarina Coal-Basin started in 1885 and since them it has been causing serious damage to the environment, specially the water resources, causing several problems like sedimentation and acidification of the rivers that supply the region, and compromising the agricultural-industry and fishery. The mining is also responsible for several professional diseases. The region was considered, in 1980, the '14th Critical Area' to the Pollution Control and Environmental Quality Conservation. Only in the beginning of the 80's, after the publication of the 917 Interministerial Resolution (July, 1982), the first official actions were taken, in order to minimize the environmental impact due to the coal mining industry. With that scenario, the region was chosen as one of the study areas of the 'National Center of Control of Mining Pollution', derived from an agreement between the Departamento Nacional de Producao Mineral - DNPM and the Japan International Cooperation Agency (JICA). The present study is part of the set of studies that have been realized in the region, with the aim of evaluating the environmental impact caused by the coal mining industry, and to suggest actions (to the miners) in order to minimize the environmental problems. This study presents a review of the occupation process of the Criciuma region, its connection to the coal industry, the progress of the mineral and environmental legislation, and the periodic monitoring of environmental parameters (physic-chemical analysis of the Mae Luzia and Sangao rivers, and the drainage from two coal mines) during the period of three years. This period began before the setting of environmental restrictions, going up to after the adoption of reclamation actions. The results allow to conclude that, during the period studied, there was no improvement in the river water characteristics, despite the adoption of reclamation actions. This behaviour may be due to the following factors: there are several abandoned mines (mainly after 1990, year of the implantation of the free trade for the coal sector), that did not finish their reclamation works. These sites are still producing acid drainage; n the sub-basins of the rivers Mae Luzia and Sangao there are several dumping tailings, probably connected to abandoned mines. These tailings are permanent fonts of sulfuric acid; even the mines in operation, in accordance with the official regulations, drain to the rivers, eventually, acid mine drainage, with no previous treatment. (author)

1999-01-01

251

Geotechnical Risks in Underground Coal Mines  

Directory of Open Access Journals (Sweden)

Full Text Available In this study, a quantitative approach and decision tree were employed in order to assess and manage roof fall risks as only major problem bring about geotechnical issues in Iranian coal mines. For the objectives, risk was assessed due to the determination of likelihoods and cost of consequences (outcomes) by the analysis of assembled roof fall data from 5 different coal regions comprising several underground coal mines in Iran. In addition, the cost of consequences is considered by a relative cost. Then, it was concluded that the annual average accidents in the all investigated mines are high and it is economically admissible to serve the proposed solutions for reducing the accidents.

K. Shahriar; E. Bakhtavar

2009-01-01

252

Sonichar coal mine at Anou-Araren (Niger)  

Energy Technology Data Exchange (ETDEWEB)

The coal extracted is used in a thermal power plant to produce electric energy used in the Arlit uranium mine 200 km away. Geography, geology, reserves, surface mining (material, wastes, coal mining) coal storage and preparation, roads and management are briefly described.

Alexandre, R.; Ouhoumoudou, M.

1986-12-01

253

Application of nuclear technics in Polish coal mining industry  

International Nuclear Information System (INIS)

[en] The radiometric gages, radiometers, densimeters, level indicators, thickness gages and other measuring instruments used in the Polish coal mining are described. The examples of possible applications in the automation of coal mines are given. The technical and economical advantages of using them in coal mining are presented. (Z.M.)

1974-05-14

254

Changes in soil physical properties of a coal mining site influenced by liming, poultry manure and revegetation  

Energy Technology Data Exchange (ETDEWEB)

The physical, chemical and biological properties of soils of reconstructed areas after coal mining are altered. This study aimed to evaluate liming, mineral and organic fertilizers and revegetation effects on the physical properties of a reconstructed soil after open-pit mining. The experiment was carried out in a former mine in Lauro Muller County - SC, in southern Brazil, from 2001 to 2005. The site was mined in 1991 and reconstructed in 1995. A randomized complete block design was used, with three replications. The treatments consisted of. (1) Control; (2) 'dregs' (alkaline residue); (3) Lime; (4) Lime + Brachiaria brizantha; (5) Lime + Brachiaria brizantha + poultry litter. Pinus taeda and Eucalyptus saligna seedlings were transplanted to subplots of all treatments. Dolomitic limestone and dregs were incorporated in the soil at a depth of 10 cm. Nitrogen, potassium and phosphorous fertilizers were added on the soil surface of all plots according to the official recommendation. Soil samples were collected in February 2005 (from the layers 0-5 and 5-10 cm), and their physical and chemical properties evaluated. The treatments had no effects on soil bulk density, particle density, total porosity, macroporosity and microporosity. Liming increased pH, caused clay dispersion and reduced aggregates stability in water, while dregs increased pH without dispersing clay. Poultry litter and Brachiaria brizantha increased the aggregate stability and volumetric water content, thus favoring the recovery of soil physical quality in degraded areas.

Neto, A.L.; Albuquerque, J.A.; de Almeida, J.A.; Mafra, A.L.; Medeiros, J.C.; Alberton, A. [UDESC, Lages (Brazil)

2008-07-15

255

Sheerness - a new coal mine for Alberta  

Energy Technology Data Exchange (ETDEWEB)

The construction of Luscar Ltd.`s Sheerness Mine near Hanna, Alberta is described. Forestburg Collieries, a Luscar subsidiary, operates the mine. The mine is designed to supply Sheerness Generating station with up to 2.1 million tonnes per year of subbituminous coal, over 30 years. Construction of the infrastructure and facilities started in March 1994. Over 1.0 million tonnes of coal had been delivered to the generating station by the end of 1995, ahead of schedule. The shop and office complex, the water management system, the haul road system, the power distribution system for the mining area, and erection of the 35 m{sup 3} dragline are described. 2 figs.

Haddock, K. [Forestburg Collieries (1984) Ltd., Forestburg, AB (Canada)

1997-04-01

256

Energetic analysis of open-pit mines by means of the cumulated energy demand in a bauxite case study; Energetische Analyse von Tagebauen mit Hilfe des kumulierten Energieaufwands (KEA) am Beispiel Bauxit  

Energy Technology Data Exchange (ETDEWEB)

In the context of a comprehensive, resource-orientated examination of mining activities the energy demand for the extraction of raw materials is an important parameter. This paper presents a method to determine the energy expenditure of bauxite extraction. First essential processes of bauxite extraction are examined in a process chain analysis and the important energy and material flows were recorded in an inventory analysis. In consideration of the energy and material expenditures, the primary energy required for the bauxite extraction is determined. The calculated cumulated energy demand (CED) allows to compare various bauxite mines with respect to primary energy expenditure. (orig.) [German] Im Rahmen einer umfassenden und ressourcenorientierten Gesamtbetrachtung stellt der mit der Gewinnung von Rohstoffen verbundene energetische Aufwand eine wichtige Groesse dar. Im folgenden Beitrag wird eine Methode zur Bestimmung der energetischen Aufwendungen vorgestellt, die mit der Gewinnung von Bauxit verbunden sind. Zunaechst werden alle wesentlichen Prozesse des Bauxitabbaus durch eine Prozesskettenanalyse untersucht und die fuer den Energieaufwand relevanten Stoffe und Energien im Rahmen einer Sachbilanz erfasst. Die fuer die Bauxitgewinnung erforderlichen Primaerenergien werden unter Beruecksichtigung aller energetischen und stofflichen Aufwendungen ermittelt. Der nach dieser Methodik berechnete kumulierte Energieaufwand KEA erlaubt einen Vergleich verschiedener Bauxittagebaue auf primaerenergetischer Basis. (orig.)

Martens, P.N. [Technische Hochschule Aachen (Germany). Lehrstuhl und Inst. fuer Bergbaukunde 1; Kugeler, K. [Technische Hochschule Aachen (Germany). Lehrstuhl fuer Reaktorsicherheit und -technik

1999-07-01

257

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

International Nuclear Information System (INIS)

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

2005-01-01

258

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

Energy Technology Data Exchange (ETDEWEB)

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)

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

259

Wireless Ethernet for longwall coal mine automation  

Energy Technology Data Exchange (ETDEWEB)

The application of wireless Ethernet technology to provide a reliable communications link to the shearer for automation of longwall mining is described. Wireless Ethernet technology was installed and tested on a coal mine longwall. The demonstration included transmission of three-dimensional shearer position data and a surface display showing shearer path in real time. The movement of the shearer can be monitored using a web browser. 4 refs., 9 figs.

Hargrave, C.; McPhee, R.; Ralston, J.; Hainsworth, D.; Reid, D. [CSIRO Exploration and Mining, Kenmore, Qld. (Australia)

2003-07-01

260

Rock dusting considerations in underground coal mines  

Energy Technology Data Exchange (ETDEWEB)

Generalized rock dusting has been the primary means of defence against coal dust explosions in underground mines in the United States since the early 1900s. A study was conducted in which researchers at the National Institute for Occupational Safety and Health collected dust samples to evaluate the explosion hazard in terms of coal dust particle size. This paper noted that dust explosion assessment procedures developed several years ago have not kept pace with advances in mining methods and the use of new ground control technologies. However, there are many factors associated with the practice of rock dust sampling that, if not taken into consideration, can adversely affect the effectiveness of the rock dust and the potential explosibility of the coal dust. Dust on elevated surfaces is dispersed and entrained by the developing explosion much more readily than dust on the floor. The increased use of meshing in mines provides such surfaces for coal dust to collect, thereby increasing the potential for dust explosion propagation if not adequately inerted. This paper also noted that band sampling equipment is not adequate to collect dust samples in mines with numerous meshes. This study showed that the current dust sampling procedures are not fully adequate for identifying potential dust explosion hazards and should be reassessed according to new research findings and mining practices. 23 refs., 4 figs.

Harris, M.L.; Weiss, E.S.; Man, C.K.; Harteis, S.P.; Goodman, G.V. [National Inst. for Occupational Safety and Health, Pittsburgh, PA (United States); Sapko, M.J. [Sapko Consulting Services LLC, Finleyville, PA (United States)

2010-07-01

 
 
 
 
261

Power projects using methane from coal mines  

Energy Technology Data Exchange (ETDEWEB)

Methane gas has at least twenty times the global warming potential of carbon dioxide. Recently, methane from coal mines has been receiving attention as both a cause for concern to the environment as well as a potential source of energy. CMM (coal-mine methane) fired power plants are being constructed in several countries around the world, most notably in Australia, Germany and China. This report identifies the CMM gas-fired power plant currently in operation, under construction and at the planning and development stage. Where possible, details are included on location, capacity, process configuration and equipment manufacturer. 68 refs., 22 figs., 12 tabs.

Sloss, L.L.

2006-06-15

262

Methane drainage in longwall coal mining  

Energy Technology Data Exchange (ETDEWEB)

This paper explores the behaviour of methane in the goaf during longwall mining, together with some methods for the control of methane emissions into the goaf, the working face, and the ventilation system. Experimental work done at Twistdraai Colliery, Sasol Coal, is referred to, as well as the gas-drainage system being practised at West Cliff Colliery in New South Wales, Australia. Gas drainage is discussed briefly, and certain suggestions are made in regard to coal mining in South Africa. 5 refs., 16 figs.

Villiers, A.W. de

1989-03-01

263

Analysis of coal mining mechanization results  

Energy Technology Data Exchange (ETDEWEB)

The reducing coal market has been enforcing the coal industry to make exceptional rationalization and restructuring efforts since the end of the eighties. To the competition from crude oil and natural gas has been added the growing pressure from rising wages and rising production cost as the workings get deeper. To improve the competitive position of the remaining 11 coal mines after the rationalization of the industry, studies to improve mining system have been carried out. The statistics of coal industry are as follows. - The production of 1996 was dropped to 4,952 thousand tonne from 5,719 thousand tonne of 1995. - The overall O.M.S was increased to 1.81 ton per man{center_dot}shift from 1.68 ton of 1995. (author). 10 tabs., 12 figs.

Kim, Young-Shik; Lee, Kyung-Woon; Kim, Oak-Hwan; Kim, Dae-Kyung [Korea Institute of Geology Mining and Materials, Taejon (Korea, Republic of)

1997-12-01

264

Self loading of coal and mine waste  

Energy Technology Data Exchange (ETDEWEB)

For the purpose of mechanising coal loading in steeply inclined coal seams prone to firedamp emission, a prototype of a self-loading container was designed and constructed in 1997. The article describes the design of the mining and roof support mechanism and self-loading container which is hydraulically operated. Coal or mineral waste is collected from the face of the heading and the container handled by a 17 CV pneumatic winch in the top road. The prototype was tested in San Antonio Pit, Hunosa, Spain in 1997. The dampness of the coal made unloading difficult - the opening in the container became blocked. Modifications were made to overcome this problem, and a second prototype successfully handled wet coal and gradings up to 200 mm. The stainless steel liner added inside the container reduced friction so the loader is now suitable for loose slates, limestone, gypsum and all types of coal. 3 figs.

Roca, J.; Palcahk, N. [Felguera Parques y Minas (Spain)

2001-01-01

265

DEVELOPMENT OF RAW MATERIALS' EXPLOITATION FOR THE CEMENT PRODUCTION IN THE OPEN PITS »PARTIZAN« AND »PRVOBORAC« OF THE »DALMACIJA CEMENT« COMPANY  

Directory of Open Access Journals (Sweden)

Full Text Available The article presents the exploitation of mineral raw materials for the cement industry of Split from the beginning of this century till today. Geological and geomcchanical characteristic of the open pits »Partizan« and "Prvoborac«, located within the same deposit and the technological exploitation process with basic parameters of suecessibility in both pits arc detaily discussed. The works of open pits' reclamation which has to be carried out simultanouslly with the exploitation itself arc also considered, as well as the perspectives of further exploitation development, in accord with modern tendencies to the mining technology development,

Slavko Vujec; Borislav Peri?; Biljana Kova?evi?

1990-01-01

266

ANÁLISIS Y DISEÑO DE LA OPERACIÓN DE PERFORACIÓN Y VOLADURAS EN MINERÍA DE SUPERFICIE EMPLEANDO EL ENFOQUE DE LA PROGRAMACIÓN ESTRUCTURADA/ ANALYSIS AND DESIGN OF DRILLING AND BLASTING OPERATION ON OPEN PIT MINING USING FOCUS ON STRUCTURED PROGRAMMING  

Scientific Electronic Library Online (English)

Full Text Available Abstract in spanish En este artículo se presenta el análisis y el diseño de la operación de perforación y voladuras en minería de superficie empleando el enfoque de la programación estructurada. El propósito de este trabajo es crear una interfaz, por medio de la cual se ingresan la densidad del explosivo, diámetro e inclinación de la perforación, resistencia a la compresión de la roca y dimensiones del banco. Luego se obtiene el valor de las variables más importantes que acondic (more) ionan el diseño de la operación de perforación y voladuras, tales como: altura del banco, burden, espaciamiento, taco, carga del barreno, numero de barrenos, factor de carga, entre otras. Esta aproximación permite diseñar la operación de perforación y voladuras en menor tiempo y disminuir el error humano que se tiene por el uso repetitivo de las fórmulas para cálculos de los parámetros involucrados en el diseño de la perforación y voladura en minería de superficie. Abstract in english This article show analysis and design drilling and blasting operation on surface mining it focus on structured programming. The idea about this article a program where you can introduce different variables like, explosive density, diameter, inclination drilling, compressive strength rock and rock mass design, after that, we get most important variables for this design like rock mass height, burden, spacing, hole charging , hole number, load factor. This article has allowe (more) d design drilling and blasting operation a lower time and get down mistake of the people that get it for repetitive use of calculation for parameter used in this design in drilling and blasting operation on surface mining.

DÍAZ-MARTÍNEZ, JUAN CARLOS; GUARÍN-ARAGÓN, MELISSA ANDREA; JIMÉNEZ-BUILES, JOVANI ALBERTO

2012-12-01

267

Dangerous zones in coal mines  

Energy Technology Data Exchange (ETDEWEB)

The experience of mining operations in dangerous zones of mines in working beds of shallow occurrence (up to 150 m) is examined. Examples are presented for the transition by the tunneling face of the geological exploration and technical boreholes, by the preparatory faces developed in zones previously mined out, cleaning operations in the zone of influence of the ravine thalweg. It is noted that the recommendations for the transition of the most frequently encountered dangerous zones in working the lignite fields by underground method should be developed by the planning organizations and coordinated with the state mining inspection agencies.

Sliz' ko, I.F.

1982-01-01

268

The Coal Mining Research Centre, Japan - 1991 review  

Energy Technology Data Exchange (ETDEWEB)

Presents data on personnel, operating expenses and experimental expenses from 1960 to 1990 and lists the research projects being carried out by the centre in the following categories. Coal production technology; coal utilization technology; and coal mine safety technology.

1991-01-01

269

Comprehensive evaluation system of coal mining  

Energy Technology Data Exchange (ETDEWEB)

In order to ensure the sustainable and effective coal mining under buildings, railways and water bodies and reduce the influence on the ground establishment and the ecological environments, from the view of technology, economics, resources and society, the three-underground mining was evaluated and the comprehensive evaluating system was constructed. The evaluation of the three-underground mining was carried out with combination of qualitative with quantitative analysis, macro with micro discussion, the technical and the economic analysis and theory with practice. Such subjects as engineering economy, science of mining subsidence, fuzzy maths, operational research, theory of information and theory of system were adopted. The results can provide the theoretical basis and practical guidance for decision-making and related policy about three-underground mining. 8 refs., 5 figs., 3 tabs.

Lian, D.; Wang, Y. [University of Science and Technology of Suzhou, Suzhou (China). Dept. of City and Environment

2005-01-01

270

Dynamic simulation and its application in coal mining  

Energy Technology Data Exchange (ETDEWEB)

A numeric dynamic model was set up by considering the engineering factors, such as coal mining, cave-in, bump, support etc. The method of dynamic simulation of coal mining was proposed, which can be used to represent effectively the alternating effect of dynamic and static loading in coal mining. The stability of the uphill of a coal mine was analyzed during coal mining. It shows that this method was practical and reliable in simulating the effect of alternating dynamic and static loading. 5 refs., 3 figs., 2 tabs.

Li, Y.; Wang, Z. [Xian Mining Institute (China)

1997-04-01

271

Environmental legislation and coal mining  

Energy Technology Data Exchange (ETDEWEB)

Discusses environmental legislation in India including: historical aspects; the Water Prevention and Pollution Control Act; the Air Prevention and Pollution Control Act; the Environmental Pollution Act; the Mines and Minerals Regulation and Development Act; the Mineral Conservation and Development Rules; the Forests Conservation Act; environmental legislation pertaining to mining; enforcement; and citizens` participation.

Sarkar, S.K. [Central Mining Research Institute, Dhanbad (India)

1994-12-31

272

Coal mining in the power industry of the Federal Republic of Germany in 1993  

International Nuclear Information System (INIS)

After an introductory text divided into the sections energy and coal market, Coal mining and brown coal mining, extensive tables containing the most important characteristic figures of German coal mining are shown. (orig.).

1994-01-01

273

An expert system to support mine planning on coal mines  

Energy Technology Data Exchange (ETDEWEB)

The objective is to develop an expert system for planning the mining area for an underground coal mine. The mine planning expert system described contains several modules that will be linked to computer-based graphical tools and a database of geological and geometric data. The layout for longwall mining is considered with reference to the development of a rock mechanics module. The model of expert`s knowledge for the rock mechanics module is classified into five subjects that evaluate layout planning according to location in the rock strata, rock pressure effect, and dimensional analysis of the support system. An expert system shell that allows both object oriented and rule oriented knowledge representation is used to implement the rock mechanics prototype. 5 refs., 2 figs.

Reuther, E.-U.; Antweiler, P.; Gutmann, M. [Institut fuer Bergbaukunde, Aachen (Germany). RW Technische Hochschule Aachen

1993-12-31

274

Toward safer underground coal mines  

Energy Technology Data Exchange (ETDEWEB)

An underground mine safety study aimed at reducing the number of accidental injuries and fatalities focused on determining what factors make some US mines safer than others and how mines can be made safer in the future. Some credit for safety improvements in this century goes to better laws and stricter enforcement, partly the result of new geological information and technological improvements, but the committee identified attitudes and motivations as the key factors in accident prevention. These factors involve a commitment by management, cooperation between management and labor, and the quality of management and employee training. There is also a link with youth and small mines to the number of accidents. The report outlines several options to mining companies and miners, and suggests ways the federal and state governments can help. 32 references, 18 figures, 29 tables. (DCK)

1982-01-01

275

NAFTA opportunities: Bituminous coal and lignite mining  

Energy Technology Data Exchange (ETDEWEB)

The North American Free Trade Agreement (NAFTA) secures and improves market access in Mexico and Canada for the United States bituminous coal and lignite mining sector. Canada is one of the United States' largest export markets for bituminous coal and lignite, with exports of $486.7 million in 1992. Conversely, the Mexican market is one of the smallest export markets for U.S. producers with exports of $1.8 million in 1992. Together, however, Canada and Mexico represent approximately 15 percent of total U.S. coal exports. The report presents a sectoral analysis.

1993-01-01

276

Technological innovation and Canadian coal mining  

Energy Technology Data Exchange (ETDEWEB)

The purpose of this paper is to determine where Canada is in terms of coal mining on the innovative ladder. The paper as presented defines innovation and innovative process; gives an historical review of innovation in the industry; and suggests the challenges to be faced in the future. 6 references.

Cochrane, T.S.

1985-05-01

277

Environmental assessment for opencast coal mining  

Energy Technology Data Exchange (ETDEWEB)

Open cast coal mining has a very 'environmentally unfriendly' image. It has been described as one of the most environmentally destructive forms of mining activity. In 1981 the Flowers Commission Report (Commission on Energy and the Environment, Coal and the Environment, HMSO) stated that even if the greatest possible care is taken in both the extraction of opencast coal and the subsequent restoration of the land, and while acknowledging that in some cases amenities have been enhanced by opencast restoration, opencast mining has a severe impact on the environment in both the short and long term. The Commission concluded that the visual intrusion of a site, the effects of dust, noise and vibration from blasting and heavy traffic movement can, taken together, add up to a very severe diminution in the quality of life for those worst affected. This article discusses the following: short term environmental impacts during working; longer term impacts on land resources; the meaning of environmental assessment (EA); procedural and technical aspects of EA for opencast coal mining; and the benefits of environmental assessment. 3 figs., 4 tabs.

Coppin, N. (Wardell Armstrong, Newcastle under Lyme (United Kingdom). Environmental Consultancy Unit)

1989-01-01

278

Coal preparation plant at the Bogdanka mine  

Energy Technology Data Exchange (ETDEWEB)

The paper describes the system for preparing gas flame coal at the Bogdanka mine in the Lublin basin. The coal preparation plant at the mine will have a capacity of 13,800 t/d, 1,800 t/d higher than the coal output of the mine. About 30% of run-of-mine coal will fall on size class from 200 to 30 mm and 70% on size class from 30 to 0 mm. Due to high preparation cost and investment the grain class from 0 to 30 mm will be left unprepared. The grain class from 30 to 200 mm will be prepared for separation by means of WK1-2,2x4 vibration screens, KWK-100U crushers and by PZ-2675 screens. DISA separators will be used for preparation of the class from 30 to 200 mm. Concentrate with a calorific value of 6400 kcal/kg and ash content of 7% will be dewatered by WP2-1.8x5,5 screens. Radial thickeners and FTC-100 vacuum filters will be used in the plant's water slurry system. The plant will consume 3500 m/sup 3//d of water. Investment will amount to 451.3 million zlotys (prices from 1978) or 1350 million zlotys (prices from 1982).

Szarafinski, Z.

1982-12-01

279

Radio communication systems for coal mines  

Energy Technology Data Exchange (ETDEWEB)

This paper summarises the mechanisms by which radio communication occurs in coal mines and the types of radio communication systems that have been developed. It then looks at a proposed communication system using cellular type radio operating in the UHF band.

Munro, J.C.

1986-01-01

280

Coal Mining Technology, An Innovative Program.  

Science.gov (United States)

|Described in detail in this report are the processes and procedures involved in the development of a State funded curriculum and program for a new emerging technology, in this instance a Coal Mining Technology Program, to be taught at Wabash Valley College in Illinois. The document provides a step-by-step account of the determination of need,…

Wabash Valley Coll., Mt. Carmel, IL.

 
 
 
 
281

Greenhouse gas emission from Australian coal mining  

International Nuclear Information System (INIS)

[en] 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

1998-01-01

282

Shaft insets in deep Polish coal mines  

Energy Technology Data Exchange (ETDEWEB)

Considerable depths and weak rock properties combined to pose problems in designing insets for new mines in Poland's Lublin coal basin. Solutions to the problems, and the application of supports and horizontal expansion joints to the shaft lining are described. 4 figs.

Bil, M.; Duszynski, J.; Szczyrba, H. (Zaklad Robot Gorniczych, Leczna (Poland))

1991-04-01

283

Generating power with drained coal mine methane  

Energy Technology Data Exchange (ETDEWEB)

The article describes the three technologies most commonly used for generating electricity from coal mine methane: internal combustion engines, gas turbines, and microturbines. The most critical characteristics and features of these technologies, such as efficiency, output and size are highlighted. 5 refs.

NONE

2005-09-01

284

Noise exposures in US coal mines  

Energy Technology Data Exchange (ETDEWEB)

Mine Safety and Health Administration (MSHA) inspectors conduct full-shift environmental noise surveys to determine the occupational noise levels to which coal miners are exposed. These noise surveys are performed to determine compliance with the noise standard promulgated under the Federal Mine Safety and Health Act of 1977. Data from over 60,000 full-shift noise surveys conducted from fiscal year 1986 through 1992 were entered into a computer data base to facilitate analysis. This paper presents the mean and standard deviation of over 60,000 full-shift noise dose measurements for various underground and surface coal mining occupations. Additionally, it compares and contrasts the levels with historical noise exposure measurements for selected coal mining occupations that were published in the 1970`s. The findings were that the percentage of miners surveyed that were subjected to noise exposures above 100%, neglecting personal hearing protectors, were 26.5% and 21.6% for surface and underground mining, respectively. Generally, the trend is that the noise exposures for selected occupations have decreased since the 1970`s.

Seiler, J.P.; Valoski, M.P.; Crivaro, M.A.

1994-05-01

285

Blast! Cape Breton coal mine disasters  

Energy Technology Data Exchange (ETDEWEB)

The book contains 18 chapters. Each chapter describes a major disaster (where three or more deaths occurred) in Cape Breton's coal mining history. The Lingan boiler explosion in 1877, the 1878 Sydney Mines explosion, 1892 Victoria Mines boiler explosions, No. 5 reserve gas explosion of 1903, runaway coal box at Scotia No. 4 in 1907, the 1908 Port Hood mine explosion, Florence No. 3 gas explosion in 1911, explosion at the New Waterford No. 12 Colliery in 1917, and a fall of stone at Inverness No.1 in 1924 are described. Other accidents were a runaway trip in 1937 and a runaway rake exactly a year later at the Sydney Mines Princess Colliery. A coal tank accident occurred at New Aberdeen No. 2 Colliery in 1943. Six disasters at Glace Bay are described: Caledonia fire and explosions in 1899, a boiler explosion at Numbers 2 and 9 surface plant in 1907, a speeding man rake in 1B Colliery in 1944, bump at No. 2 Colliery in 1946, and the explosions at No. 20 Colliery in 1952 and at No. 26 Colliery in 1979. A note containing a tribute to Cape Breton draegermen is included. 1 map.

MacKenzie, R.

2007-07-01

286

Coal mining and water quality: the effect of coal mining on water quality in the Tennessee Valley region  

Energy Technology Data Exchange (ETDEWEB)

The water quality problems caused by coal mining in the Tennessee River watershed and coal fields in adjacent regions are discussed. The area covered by the report includes portions of Alabama, Kentucky, Tennessee, and Virginia. Streams and rivers in these states believed to be affected by coal mining activities are identified, and a brief discussion of prevention and treatment of water pollution due to coal mining is presented. A section on mining regulations as they apply to coal mining and water pollution is included. (JMT)

Olem, H.; Watson, J.T.; Ruane, R.J.

1980-01-01

287

Coal mining industry on the Philippines  

Energy Technology Data Exchange (ETDEWEB)

Between 1973 and 1985, coal production in the Philippines increased from 39 000 tpa to 1.26 million tpa. Private investors were attracted by changes in the concession procedure; this helped to lower the country's dependence on imported petroleum. Nearly half the annual production comes from a modern open-cast mine on Semirara Island. The next in productivity is the Malangas Coal Corp. mine on Mindanao Island of the Philippine National Oil Company, which is worked by longwall caving. 40% of the country's production is from small mines worked by simple methods and with high productivity losses. 2.4 million tonnes of coal were consumed in 1985, 50% of which were imported. By 1995, coal consumption is expected to equal 4.8 million tpa, with a domestic production of 3.75 million tpa. With the government's decision of abandoning the 620 MW nuclear power plant project on Batan Island, coal will become a still more important factor in Philippine power supply. (orig./MOS).

Bomasang, R.B.; Bandelow, F.K.; Casupang, D.M.

1987-07-23

288

Remediation of saline water from coal mining  

Energy Technology Data Exchange (ETDEWEB)

The objective of this study was the identification of an affordable process which will treat the typical saline water produced by the coal industry. A review of technologies concluded that: remediation of saline water is an issue for about 50% of coal mines; the saline mine water has an average of 5,000 ppm total dissolved solids; sodium is the predominant cation. Chloride, sulphate and bicarbonate are the dominant anions; the mixture of salts, particularly sodium sulphate, results in the solids concentrate having very little current market value. Storage of mine water on site is not a long-term option; use by other local mines or industries would provide the easiest and least costly solution; membrane techniques are capable of converting the majority of the volume of minewater to saleable water and a concentrated brine. Of the membrane techniques, electrodialysis reversal (EDR) appears to be the most prospective; evaporation in solar ponds or via enhanced spray drying appears to have prospects; two different solutions are required, one in which sufficient land is available for ponds (e.g. most Bowen Basin mines) and others where there are tight restrictions on available land (e.g. Hunter Valley mines); disposal of the concentrate by entombment may be possible; transport of the concentrate to the ocean should be considered further.

Bruce Firth; Russell Taylor; Richard Hannink; Mike O' Brien [CSIRO Energy Technology (Australia)

2002-05-01

289

Minerals planning guidance: opencast coal mining  

Energy Technology Data Exchange (ETDEWEB)

These guidelines provide advice to mineral planning authorities on the exercise of planning control over opencast coal mining in particular, they indicate the national policy considerations which need to be taken into account in drawing up opencast coal policies and programmes and some of the factors to be considered when determining individual planning applications. The national policy considerations covered by the guidelines include those relating to national parks, other sensitive areas, green belts, agricultural land and development plans. Restoration and after care, and speeding the planning process are also covered in the guidelines. The main issues which can be raised by opencast mining - visual noise, raise, blasting, dust, watercourses, transportation; land use and built heritage- are summarized in an appendix and a brief summary of opencast coal production in England and Wales is given in figures.

1988-05-01

290

Coal mine reclamation in Spain  

Energy Technology Data Exchange (ETDEWEB)

Spain, particularly the provinces of Castilla-Leon, Aragon, and Galicia, has poor vegetation in areas of abandoned mine lands due to the late appearance of legal standards for reclamation, the predominance of small mining operations, and a speculative managerial focus in addition to poor production techniques in which reclamation plans were never considered. Advances have been made in the topographic integration of spoils, but there is still much work needed in the rehabilitation phase of soils and revegetation.

Samos Hernandez, J.M.; Calabuig, E.L. (Universidad de Leon, Leon (Spain). Dept. de Ecologia y Genetica)

1991-01-01

291

Co-operation saves Collie`s coal mines  

Energy Technology Data Exchange (ETDEWEB)

This paper describes how Western Australia`s two coal mining companies raised productivity following an ultimatum from the State Government over fuel contracts for a new proposed 2 billion dollar power station at Collie. Western Collieries produced coal from underground and surface mines, the underground mines were shut and surface mining operations consolidated at Premier Mine. The design, operations, and industrial relations on this site is described. 2 figs.

Green, S. [Western Collieries Ltd., Collie, WA (Australia)

1996-07-01

292

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

Energy Technology Data Exchange (ETDEWEB)

Based on the characteristics of the coalfield geology and the distribution of coal bed methane (CBM) in China, the geological conditions for exploiting CBM and draining 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 CBM exploitation in China are summarized and the major technical problems of coal mine gas control and CBM exploitation analyzed. It was emphasized that 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 exploitation. The technical countermeasure should be integrating the exploitation of coal and CBM and draining gas before coal mining. 8 refs.

Jian-zhong Liu [China Coal Research Institute, Beijing (China)

2009-09-15

293

Coal mine subsidence - eastern United States  

Energy Technology Data Exchange (ETDEWEB)

In the eastern US, thousands of acres of land in urban areas are threatened by subsidence as a result of coal mining. Roof collapse, crushing of pillars, or punching of pillars into the floor are now resulting in sinkhole or trough subsidence tens, or even hundreds, of years after mining. In areas of active mining, where total extraction is practised, subsidence is essentially contemporaneous with mining. Ground deformations resulting from subsidence have often been assumed to cause damage to structures in terms of simple tension and compression transferred by friction and adhesion to the undersides of foundations. Differential settlement, intensified pressure on sub-grade walls and other modes of soil-structure interaction are of equal significance in the eastern United States.

Gray, R.E.; Bruhn, R.W.

1984-01-01

294

Mine rehabilitation, a handbook for the coal mining industry  

Energy Technology Data Exchange (ETDEWEB)

This book offers easily understood, practical and relevant guidelines and advice to those involved in implementing rehabilitation programmes. The importance to success of preplanning of rehabilitation programmes and an adequate understanding of the material to be revegetated are emphasised in the text. This handbook is a valuable aid for those involved in the planning, implementation and achievement of successful rehabilitation of land mined for coal.

Hannan, J.C.

1984-01-01

295

Combined method of dust explosion protection in coal mines. [USSR  

Energy Technology Data Exchange (ETDEWEB)

This paper discusses methods for protection against dust explosion hazard used in Soviet black coal mines. It is stated that using rock dusting is efficient in dry workings with coal dust buildup not exceeding 50 g/m/SUP/3/d. Increased air humidity and presence of water eliminated protective dust influence. Design of rock dust barriers used in coal mines is discussed. Use of water combined with coal dust wetting agents is advisable when coal dust buildup exceeds 50 g/m/SUP/3/d. Wetting agents (hygroscopic compounds) are used when air humidity is not lower than 85%, otherwise wetting agent consumption is excessively high. In underground coal mines in Siberia and in the far north only rock dusting is used due to temperatures below freezing. In the Ukranian coal mines water is used in 80% of mines and combined methods in 20% of mines.

Petrukhin, P.M.; Netseplyaev, M.I.

1982-01-01

296

RECULTIVATION AND SUSTAINABLE DEVELOPMENT OF COAL MINING IN KOLUBARA BASIN  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Coal plays a fundamental role in global development, but the coal mining industry exerts impact on the environment, society and economy. Kolubara Coal Company produces about 30 million tonnes of coal, and digs about 70 million m3 of overburden per year. The main result of surface coal is certainly t...

Ivica M Ristovi?; Milan Stojakovi?; Milivoj Vuli?

297

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

Science.gov (United States)

CIEMAT. Avda. Complutense, 22. 28040 Madrid. Spain. The El Bierzo carboniferous basin (León, N.W. of Spain) is placed in a tenth of the surface of this district, in the area called "Bierzo Alto". Coal has been mined in El Bierzo from the late XVIII century, having been intensely exploited during the XX century. The mining activity has left a heritage of withdrawed mining structures. Nowadays some mining activity remains in the area, and new exploitations based on open pit processes, cause the burial of natural soil with overlaying mine tailings. Characterization and study of the edaphic landscapes in the area is a necessary activity within the framework of its overall restoration planning, also providing fundamental information for the design and monitoring of waste coal recovery activities. For this work eight zones were chosen, representing the spatial variability within the upper basin of the Rodrigatos river, into the Bierzo Alto, including reference areas not affected by mining activities. In addition three mine tailings outside the area are included in this work to cover the variability of restoration processes. After a first study, based on physical, physico-chemical and chemical characteristics of soils, we have continued the study including some eco-physiological parameters. The objective of this work is to identify potential soil disruption, its extent and causes. Soil microbial activity is influenced by a wide set of soil characteristics. Eco-physiological parameters analysed in this work are: • Microbial Biomass carbon • Basal Respirometry • Maximum respiratory rate Microbial biomass carbon was analysed according the Substrate Induced Respirometry (SIR) method. Relational parameters such as metabolic quotient (CO2-C/Cmic) and the Cmic/Corg ratio have been obtained from these variables. Our results shown that soil microbial biomass carbon is strongly influenced by the water holding capacity (WHC) of the samples (R=0,895) as well as by organic matter (O.M.) content (R=0,801), in addition, WHC and O.M. are also strongly related (R=0,794), so O.M. seems to be the key variable in the soils studied. Recovery stage of the studied plots may be stablished with each of the mentioned parameters. All the correlations mentioned were significant at P<0.001 level. Maximum respiratory rate as well as Metabolic quotient data also allow to identify most stressed soils, corresponding with coal mine tailings in the Rodrigatos river basin. Results obtained for Cmic/Corg ratio show difficulties to be interpreted in the case of mine tailings. The practice of burying soils with coal mining debris has provided this new surface with relatively high inputs of organic carbon, in excess of this provided from fresh organic matter. In our study eco-physiological parameters are usefull tools in order to clasify the restoration level of mine tailings, specially those parameters having a high correlation with the organic matter content, Nevertheless some of those parameters then present some added difficulties to be interpreted that will be discussed in this work. Acknowledgement: We appreciate technical support in the field from Mr. Luis del Riego Celada, as well as the financial support from the Fundación Ciudad de la Energía.

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

2010-05-01

298

Coal chute jamming during shield mining  

Energy Technology Data Exchange (ETDEWEB)

This paper evaluates results of studies carried out by KuzNIUI and VostNII on causes and phenomenon of coal chute jamming during coal haulage in steep coal seams mined by a shield system. Investigations were carried out underground under operational conditions and on physical models in a laboratory. Investigations indicate that in spite of the fact that the proportion of large coal lumps over 150 mm in coal moving by a chute amounts to about 8%, these large lumps cause jamming. Experiments on a physical model, made of equivalent material, indicate that large lump concentration in a chute is caused by low angle of intake funnel walls. Coal fines move quicker and large lumps, which accumulate on the top of fines, enter the coal chute at the same time thus increasing jamming hazard. Jamming hazard is also influenced by properties of chute supports and smoothness of chute walls. It is suggested that jamming can be successfully reduced by supporting chute walls by means of resin injections. This method of supporting reduces friction coefficient of the chute walls. Using scrapers to haul coal from the shields to the chute is also recommended. (In Russian)

Al' khimovich, V.P.; Zubareva, V.A.

1981-03-01

299

Investigation of coal prices and mine productivity  

Energy Technology Data Exchange (ETDEWEB)

This report examines the empirically established relationship between coal prices and mine productivity. Literature on this topic is critically reviewed, and a conceptual model using the neoclassical theory of the firm is developed. In addition, industry-structure arguments related to firm composition, producer concentration, and firm goals are explored. The conceptual models are tested using mine-level data from the 1970s. The major conclusion of the study is that the coal industry responds to price changes in a manner that is consistent with a competitive, dynamic industry, implying that the coal industry is utilizing limited productive resources (land, labor, capital, energy) in an efficient manner. Therefore, one would expect higher production costs and reduced productivity as the industry attempts to meet the increased demand for coal expressed in higher prices - hence, an inverse price-productivity relationship. Ways in which this relationship can be improved include reviewing regulations and enforcement procedures, improving labor relations, opening new low-cost reserves on public lands, and improving mining technology.

Baker, J.G.; Stevenson, W.

1981-09-01

300

Winning methods in South African coal mining  

Energy Technology Data Exchange (ETDEWEB)

The choice of winning method is largely determined by geological conditions and mine layout. South African coal seams lie at relatively shallow depth, are level and have thicknesses between 0.7 and 8 m. The coal is harder than the European variety and, since fissures and cleats as well as any appreciable rock pressure are absent, the workability is reduced. But the most important limitation is represented by Dolerit beds which can span large areas without caving. Investment costs per tonne of annual production are between 30 and 50 R/t, operating costs between 2.40 and 10 R/t and the average productivity per man per Year around 1000 t. The differences in costs and productivity are largely due to the winning method chosen. The long-established and until recently only winning method was entry extraction. Its advantages are offset at depths of more than 100 m by winning losses. But because the mines situated close to large power stations and coal liquefaction plants require full extraction of deposits, a start has been made on introducing longwall mining. It faces the difficulties of the thick Dolerit beds and less promising selective extraction options. An investigation has shown that 29-76% of the coal reserves are suitable for longwall, 6-66% for room and pillar and 5-18% for opencast.

Pardoe, D.R.; Pedroncelli, E.J.

1982-02-18

 
 
 
 
301

Complex mechanization of coal mining and its perspectives  

Energy Technology Data Exchange (ETDEWEB)

This article evaluates problems associated with the increasing mechanization of underground coal mining. In 1979, 65.3% of Soviet coal output was produced at work fronts mined by mechanized sets of mining machines. Mechanization of coal mining in three coal basins was completed. In the Podmoskovnyi coal basin 98.5% of coal was produced by mechanized sets of machines, in the Pechora basin 94.4%, and in the Karaganda basin 91.5%. In the Kuzbass and Donbass 66.8% and 54.2% of coal output respectively was mined by mechanized sets of machines. Between 1975 and 1979 the number of mechanized sets of mining machines supplied to coal mines increased; however, the number of machines standing idle for various reasons also increased sharply. Investigations show that in the period from 1976 to 1979, the average number of mechanized sets of mining machines working at coal faces decreased 1.2 times in comparison to the period 1971 to 1975. Duration of capital repairs of coal shearer loaders was on the average 1.5 times longer than technically required. Mining machines and mechanized sets of machines produced from 1975 to 1979 for mining longwall faces are characterized (KM-103, KMT, 1UKP, PUKP, KMT 130, AK-3). (In Russian)

Nikitin, V.D.

1980-08-01

302

The economic peculiarities of Ukraine coal mines capacity support  

Energy Technology Data Exchange (ETDEWEB)

The Ukrainian policy on coal mine capacity support is discussed. Ukraine has 3.5-4 billion tons of effective resources. To define the rating of the coal mines and efficiency, it is necessary to use all the economic parameters and to be able to transfer the non-profitable mines into private or lease properties.

Sally, V.I.; Sharov, A.I.; Shincarenko, S.V. [National Mining University of Ukraine, Dnipropetrovsk (Ukraine)

1999-07-01

303

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

Directory of Open Access Journals (Sweden)

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.

MENG Zhao-jian

2013-01-01

304

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

International Nuclear Information System (INIS)

[en] 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

1992-01-01

305

Development history of coal mine and advanced mining technology; Tanko no rekishi to saitan gijutsu no shinpo  

Energy Technology Data Exchange (ETDEWEB)

Japanese coal mine was get a full supply for the construction of the modernize nation in Meiji and the reconstruction of the industry after the second world war. This perfection was completed by the full coal resources and the advanced coal mining technology. But, japanese recent coal seam is too deep for the economical mining. And yet, advanced coal mining technology of japan is necessary for the coal mine of the developing country. (author)

Nohara, H. [Tokyo (Japan)

2000-04-20

306

German coal mining in 1993  

International Nuclear Information System (INIS)

[en] The paper deals with the economic situation at the Federal Republic of Germany and how this affects the energy economy in general and lignite mining in particular. (HS)[de] Der Vortrag behandelt die wirtschaftliche Lage der Bundesrepublik Deutschland sowie die Auswirkungen auf die deutsche Energiewirtschaft und damit auch auf den Braunkohlenbergbau. (HS)

1994-01-01

307

Sustainable world coal mining and use: perspectives to 2030  

Energy Technology Data Exchange (ETDEWEB)

The paper is based on the World Energy Council 2004 study 'Sustainable global energy development - the case of coal'. It covers whether coal reserves are sufficient to meet the anticipated growth in global coal demand to 2030 and beyond, coal's affordability and competitiveness, coal mining productivity and the deployment of coal mining technology, coal and the challenges of sustainability, particularly the emission of CO{sub 2}, and coal-related business strategies and government policies. 24 refs., 8 figs.

Brendow, K.

2005-07-01

308

Modern coal mining on Spitsbergen produces less greenhouse gas  

International Nuclear Information System (INIS)

[en] At Spitsbergen, coal is now produced with profit and with less adverse climatic effect than imported coal from Australia. Many aspects of the mining operations at Spitsbergen's new coal mine, Svea Nord, contribute to the fact that the impact on the climate is less than with many other coal mines. The net calorific value of the coal is high, the amount of methane gas is negligible, and very little energy is used for transporting the coal to the quay. In some countries many coal power plants are old and operate at efficiencies of only 25 to 30 per cent. The efficiency of a modern coal power station in Western Europe is 80 to 85 per cent. At Spitsbergen, the new coal mine produces less carbon dioxide than does travelling there

2001-01-01

309

Major technical measures for the concentration of coal mines. [China  

Energy Technology Data Exchange (ETDEWEB)

Currently, the major problems in mine operations are: dispersion of the operations with mines densely located in the field, high rate of roadway maintenance, and low productivity. The major ways for achieving concentration of mine operations throughout China are: concentration of operation at the coal faces; concentration of the mining sections; concentration of operations at various levels; concentration of the mines and overall planning for technical transformation of the mine area.

Jia Yueqian

1981-05-01

310

Traverse analysis in underground coal mines  

Energy Technology Data Exchange (ETDEWEB)

This paper examines the accuracy of underground traverses in relation to the New South Wales Surveying and Drafting Instructions for Coal Mine Surveyors (Underground) 1984. This new standard is analysed to see how the new surveying requirements relate to the older surveys. The theoretical background to the instructions are reviewed and the overall aims of the update are wholly supported. It was found that most surveys produced before the new instructions were well within the new guidelines. 8 refs.

Knight, R.

1987-06-01

311

Coal mining needs a little common sense  

Energy Technology Data Exchange (ETDEWEB)

The influence of the Commission on Resources and the Environment (CORE) process to the economic and social structure of the East Kootenays, British Columbia is discussed. Through its land use planning mechanisms, CORE is impeding the economic viability of the mining industry. Over 16% of the land base (671,100 hectares) has been alienated from resource use. The result will be unemployment in the East Kootenays, which contains 82 billion tonnes of coal reserves.

Sumanik, K.

1997-08-01

312

Clean coal technologies and environmental protection  

Energy Technology Data Exchange (ETDEWEB)

Reclamation of open-pits, tailings sites, neutralizing of acid mine water and protection against spontaneous coal combustion are carried out very successfully nowadays. New mineral processing technologies make possible considerable reduction of ash and sulphur content in coal. The application of the so called clean combustion technologies help reduce the amount of solid refuse and gaseous pollutants emissions. The protection measures used in single exploitation stages and the most promising technologies of coal processing and combustion are presented. 8 refs., 6 figs., 2 tabs.

Salopek, B. [University of Zagreb, Zagreb (Croatia). Faculty of Mining, Geology and Petroleum Engineering

1994-12-31

313

Underground coal mining section data. Final report  

Energy Technology Data Exchange (ETDEWEB)

A set of tables which display the allocation of time for ten personnel and eight pieces of underground coal mining equipment to ten function categories is provided. Data from 125 full shift time studies contained in the KETRON database was utilized as the primary source data. The KETRON activity and delay codes were mapped onto JPL equipment, personnel and function categories. Computer processing was then performed to aggregate the shift level data and generate the matrices. Additional, documented time study data were analyzed and used to supplement the KETRON databased. The source data including the number of shifts are described. Specific parameters of the mines from which there data were extracted are presented. The result of the data processing including the required JPL matrices is presented. A brief comparison with a time study analysis of continuous mining systems is presented. The procedures used for processing the source data are described.

Gabrill, C.P.; Urie, J.T.

1981-09-01

314

Continuous surface mining of coal and parting  

Energy Technology Data Exchange (ETDEWEB)

The mine planning and operational aspects related to the application of Continuous Surface Miner (CSM) technology to Australian strip and open cut coal mines is investigated for both existing mines and those at the pre-production/planning stage. Several types of CSM were identified and investigated. CSM productivity as a function of geomechanical properties, formation thickness, mechanical availability and in-pit physical constraints, are considered. Productivity data and operating costs are derived from currently operating production machines and from first principles. Industrial relations aspects of this technology which conflict with existing job/union classification were noted. Horizon control of CSM's including manual and low/high technology options is discussed.

O' Regan, G.J.; Wood, D. (Australian Coal Industry Research Labs. Ltd., North Ryde, NSW (Australia))

1988-12-01

315

Disposal of coal combustion byproducts in underground coal mines  

Energy Technology Data Exchange (ETDEWEB)

Approximately 90 million tons of coal combustion byproducts (CCB) are generated annually by the electric utility industry in the United States. The major byproducts include fly ash ({approximately} 54%), bottom ash ({approximately} 16%), boiler slag ({approximately} 7%), and flue gas desulfurization sludges ({approximately} 23%). Of the amount generated, about 19 million tons are beneficially used. The remaining, about 71 million tons, is disposed of in impoundments and landfills. The costs for these disposal methods continue to increase due to more stringent environmental regulatory requirements and rising material, labor, and site development costs. As such, these increasing disposal costs are causing the electric utility industry to pursue other disposal and utilization alternatives. This study examined methods of disposing of the ashes in underground coal mines by injection. This method of disposal lessens ground subsidence and reduces possible air pollution from suspended dusts. The ash may also neutralise acid mine drainage. 1 fig.

Gray, T.A.; Kyper, T.N.; Snodgrass, J.L. [GAI Consultants, Inc. (United States)

1997-12-31

316

30 CFR 762.15 - Exploration on land designated as unsuitable for surface coal mining operations.  

Science.gov (United States)

...designated as unsuitable for surface coal mining operations. 762.15 Section...AREAS AS UNSUITABLE FOR SURFACE COAL MINING OPERATIONS § 762.15 Exploration...designated as unsuitable for surface coal mining operations. Designation...

2010-07-01

317

43 CFR 20.402 - Interests in underground or surface coal mining operations.  

Science.gov (United States)

...Interests in underground or surface coal mining operations. 20.402 Section...Interests in underground or surface coal mining operations. (a) Definitions...interest in underground or surface coal mining operations means...

2009-10-01

318

Alkaline mine drainage from metal sulphide and coal mines: examples from Svalbard and Siberia  

Energy Technology Data Exchange (ETDEWEB)

This paper presents previously unpublished data from coal mines of the Abakan-Chernogorsk region, Khakassia, Serbia, the coal miens of Longycarbyen, Svalbard, an Arctic archipelago and magnetite mines in the Sayan and Kuznetsk-Alatau Mountains of Siberia to illustrate the chemistry of alkaline mine drainage waters and to discuss the possible mechanisms involved in their generation. 19 refs., 2 figs., 5 tabs.

Banks, D.; Parnachev, V.P.; Frengstad, B. (and others) [Holymoor Consultancy, Chesterfield (United Kingdom)

2002-10-01

319

Productivity trends in the coal mining industry in Canada  

Energy Technology Data Exchange (ETDEWEB)

The trends and drivers of productivity for the coal mining industry in Canada are examined for the period 1961-2000. The following aspects of the coal mining industry are considered: size, regional distribution and organization in Canada, resource base, labour force and related characteristics, capital intensity, technological and process developments, output price, regulation and taxation, environmental performance, and unemployment and capacity utilization. Data are included on labour, capital, and total factor productivity levels and growth. The factors that explain the growth performance of labour productivity in the coal mining industry are discussed. A review of the literature on coal mining productivity is included. 44 refs., 6 figs., 3 tabs.

Smith, J.

2004-10-01

320

Working group report: methane emissions from coal mining  

International Nuclear Information System (INIS)

[en] The process of coalification inherently generates methane and other byproducts. The amount of methane released during coal mining is a function of coal rank and depth, gas content, and mining methods, as well as other factors such as moisture. In most underground mines, methane is removed by drawing large quantities of air through the mine releasing the air into the atmosphere. In surface mines, exposed coal faces and surfaces, as well as areas of coal rubble created by blasting operations are believed to be the major sources of methane. A portion of the methane emitted from coal mining comes from post-mining activities such as coal processing, transportation, and utilisation. Some methane is also released from coal waste piles and abandoned mines. This paper highlights difficulties with previous methane emission studies namely: absence of data on which to base estimates; use of national data to develop global estimates; failure to include all possible emission sources; overreliance on statistical estimation methodologies. It recommends a 'tiered' approach for the estimation of emissions from underground mines, surface mines and post-mining activities. For each source, two or more approaches (or 'tiers') are presented, with the first tier requiring basic and readily available data and higher tiers requiring additional data. 29 refs., 3 tabs

1993-01-01

 
 
 
 
321

Coal mining in the Saar; Der Steinkohlenbergbau im Saarland  

Energy Technology Data Exchange (ETDEWEB)

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.)

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

2005-07-01

322

Coal mining in Saarland; Der Steinkohlenbergbau im Saarland  

Energy Technology Data Exchange (ETDEWEB)

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.)

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

2005-05-01

323

Coal mine dust lung disease. New lessons from old exposure.  

UK PubMed Central (United Kingdom)

Coal mining remains a sizable industry, with millions of working and retired coal miners worldwide. This article provides an update on recent advances in the understanding of respiratory health issues in coal miners and focuses on the spectrum of disease caused by inhalation of coal mine dust, termed coal mine dust lung disease. In addition to the historical interstitial lung diseases (coal worker's pneumoconiosis, silicosis, and mixed dust pneumoconiosis), coal miners are at risk for dust-related diffuse fibrosis and chronic airway diseases, including emphysema and chronic bronchitis. Recent recognition of rapidly progressive pneumoconiosis in younger miners, mainly in the eastern United States, has increased the sense of urgency and the need for vigilance in medical research, clinical diagnosis, and exposure prevention. Given the risk for disease progression even after exposure removal, along with few medical treatment options, there is an important role for chest physicians in the recognition and management of lung disease associated with work in coal mining.

Petsonk EL; Rose C; Cohen R

2013-06-01

324

Coal mine dust lung disease. New lessons from old exposure.  

Science.gov (United States)

Coal mining remains a sizable industry, with millions of working and retired coal miners worldwide. This article provides an update on recent advances in the understanding of respiratory health issues in coal miners and focuses on the spectrum of disease caused by inhalation of coal mine dust, termed coal mine dust lung disease. In addition to the historical interstitial lung diseases (coal worker's pneumoconiosis, silicosis, and mixed dust pneumoconiosis), coal miners are at risk for dust-related diffuse fibrosis and chronic airway diseases, including emphysema and chronic bronchitis. Recent recognition of rapidly progressive pneumoconiosis in younger miners, mainly in the eastern United States, has increased the sense of urgency and the need for vigilance in medical research, clinical diagnosis, and exposure prevention. Given the risk for disease progression even after exposure removal, along with few medical treatment options, there is an important role for chest physicians in the recognition and management of lung disease associated with work in coal mining. PMID:23590267

Petsonk, Edward L; Rose, Cecile; Cohen, Robert

2013-06-01

325

Coal mining and the environment. Bergbau und Umwelt  

Energy Technology Data Exchange (ETDEWEB)

The papers facilitate access to the relation between black coal mining and different environmental aspects. The examples used to describe the problem and adequate solutions represent the situation of the Saar region and the North-Rhine Westphalian coal district. Among others, they point out the environmental effects of coal mines and deal with the environmental impact statement, the effects of landscaping on ecological functions and the securing of the resources left behind in shut-down coal districts.

1986-01-01

326

Method for mining coal using ammonia and nitrifying bacteria  

Energy Technology Data Exchange (ETDEWEB)

Subterranean coal seams are treated with ammonia to enhance methane removal and improve the mineability of coal. Residual ammonia remaining from the coal treatment is removed by contacting the coal seam with nitrifying bacteria after ammonia treatment and before mining is carried out.

Bray, B.G.; Fonseca, A.G.; Kosky, R.

1981-03-03

327

Respirable dust levels in coal, metal, and nonmetal mines  

Energy Technology Data Exchange (ETDEWEB)

The Bureau of Mines developed the Mine Inspection Data Analysis system (MIDAS). MIDAS is a computerized, industrial hygiene data base capable of statistically analyzing environmental data collected in coal and noncoal mines and mills by Mine Safety and Health Administration (MSHA) inspectors or mine operators. The objectives of this report are to describe the current contents of MIDAS, to report analyses of coal and noncoal mine respirable dust samples collected by MSHA inspectors, and to evaluate the proposed change in the metal and nonmetal respirable dust standard from a formula based upon the percentage of quartz identified in the sample to 100 ..mu..g/m/sup 3/ of respirable quartz.

Watts, W.F. Jr.; Parker, D.R.

1987-01-01

328

Organisation development in coal mines  

Energy Technology Data Exchange (ETDEWEB)

Good management and the best possible direction of affairs are concepts which have to be striven for constantly and unremittingly within a business. The strategy of organisation development provides a framework for our times to achieve these aims. Seven criteria are discussed, which provide ways and means of managing a mine with as little red tape as possible and of constantly and flexibly adapting to human, technical and ambient changes. Much is demanded from everyone in the organisation, and everyone demands much from himself. The employees evolve into ''men of enterprise within the enterprise'' and are motivated and keen. Their qualifications and competence increase in the measure in which their projects to improve the work situation in the widest sense are successful.

Lensing-Hebben, W.

1986-07-24

329

Assessment of hydrogeological conditions and prediction of water gush for mining the lowest coal seam in Xingtai coal mine  

Energy Technology Data Exchange (ETDEWEB)

In order to mine the coal seam at the deeper level under safe conditions, the Ordovician hydrogeological conditions in Xingtai coal mine are analysed. The study is focused on the affecting factors and the mechanism of water inrush from the coal seam floor. The risk of water inrush from the Ordovician limestone before the commencement of mining activity is investigated with the help of GIS. The mining area is divided into three zones, i.e., the safe area, the potential water inrush area and the water inrush area. It is suggested that the depth of initial mining should be above -210 m. 4 refs., 1 fig.

Wang, X.; Zheng, S. [China University of Mining and Technology (China). Beijing Campus

2000-06-01

330

Situation with regard to work safety at coal mines  

Energy Technology Data Exchange (ETDEWEB)

Presents a general review of safety in coal mining around the world. The areas covered are ventilation, degassing, rock bursts, dust suppression, spontaneous coal combustion and fire monitoring systems, firefighting equipment, air conditioning equipment for deep mines and accidents statistics (injuries to miners). The important trends in these areas are mentioned and figures are given for e.g. MAC levels for airborne dust, methane emission per tonne of coal mined, etc. Specific mention is made of shock blasting used at the Dauphine mine (France), the BVS firefighting system (FRG) and a fire gas analyzer developed by Bergbau-Forschung (FRG). Accident data show an increased number of fatal injuries in USA coal mining in 1986 (87), with British Coal (UK) and the South African coal industry reporting lower indices than in 1985.

Sleptsov, E.I.

1988-04-01

331

Information and control system of CSM Coal Mine preparation plant  

Energy Technology Data Exchange (ETDEWEB)

This paper presents a view on the latest method of coal product preparation control, where the preparation plant is treated as a link in the chain of planning, production and sales procedures from setting up, exploitation and coal preparation to the sales of mining production. The coal preparation plant control system described here encompasses only a part of the aforementioned chain but the criterion of the system integration in the corporate management was observed as one of the primary criteria. The control system of CSM Coal Mine preparation plant and sales was designed in 1992 to 1996 by ATP Soukup s.r.o., the leading supplier of coal preparation plant control systems in the Ostrava region. The most notable systems are installed at CSA Coal Mine`s Doubrava preparation plant, Lazy Coal Mine`s Dukla preparation plant and CSM Coal Mine`s CSM preparation plant. ATP Soukup s.r.o. offers also improvement and automation of technological sets and deals in development and manufacture of process variable sensors for the coal preparation plants. 6 figs.

Danel, R.; Skotnica, J. [ATP Soukup s.r.o., Ostrava (Czech Republic)

1997-12-31

332

Development of technology for brown coal surface mining in Poland  

Energy Technology Data Exchange (ETDEWEB)

Discusses development of brown coal surface mining in Poland in the last four decades. Mining schemes, types of mining equipment, manufacturing mining equipment and research programs of the four development stages of Polish brown coal mining are comparatively evaluated. In the first development stage equipment for coal surface mining used in Poland was manufactured in Germany. Small excavators and power shovels were used for mining and overburden removal; railroad cars were used for overburden and coal transport. Hydraulic mining with hydraulic transport of overburden was used on an experimental basis. The second development stage was associated with introduction of bucket wheel excavators, belt conveyors and dumping conveyors. The systems were characterized by limited output and reliability. Research programs concentrated on increasing output and reliability of mining systems. The third development stage was associated with construction of the Belchatow surface mine, the deepest in Poland, with complicated tectonics, high resistance of overburden to digging and a complicated system of mine draining by deep wells. The fourth and last development stage is associated with planned construction of the Szczercow mine (in the Belchatow-Szczercow brown coal deposit).

Drozdowski, S. (Kopalnia Wegla Brunatnego Belchatow (Poland))

1989-01-01

333

International coal encyclopedia: coal exporting producers, coal mine index, coal distributors, international traders, and petroleum coke products; Volume 2, 1995  

Energy Technology Data Exchange (ETDEWEB)

Volume 2 of this annual encyclopedia is a directory of coal exporting producers. This year`s edition also contains revised and expanded sections on international trading companies, importing and exporting distributors, and coal mine index. New sections are included on petroleum coke and coal quality (the later is issued as supplement).

NONE

1995-06-01

334

Development of mining machinery in 2000 AD for Indian underground coal mines  

Energy Technology Data Exchange (ETDEWEB)

Coal production is expected to reach about 407 Mt against 104 Mt at present. This will require changes in mining methods and consequently the mining machinery. The paper discusses the suitability of the alternatives available to the Indian conditions. The emphasis is on longwall mining methods and room and pillar techniques. Hydraulic mining is discussed in the context of future projects. In-situ coal gasification is considered unsuitable for the conditions found in the major Indian coalfields.

Shastri, D.R.R.

1982-03-01

335

Improving technology for underground mining of coal seams. Sovershenstvovaniye tekhnologii podzemnoy razrabotki ugolnykh plastov  

Energy Technology Data Exchange (ETDEWEB)

The collection contains articles about studies to improve the technology for underground mining of coal seams in different mining and geological and mining and technical conditions, including hydromines.

1984-01-01

336

Planning mining operations in coal mines in foreign countries. Planirovka gornykh rabot na ugol'nykh shakhtakh za rubezhom  

Energy Technology Data Exchange (ETDEWEB)

This paper discusses methods for opening and developing coal deposits as well as mining systems used in various countries. It evaluates the following problems: opening and developing coal fields in the FRG, mining at large depths in the FRG, mining systems in the United Kingdom in coal mines under the sea bed, methods for mining level coal seams, methods for mining thin and medium coal seams with caving in the FRG, thin seam mining under the sea bed in the United Kingdom, thick seam mining with caving in France and Yugoslavia, room and pillar mining systems in France, India, South Africa and the USA, mining with stowing in Czechoslovakia, India and Poland, steep seam mining, thin steep seam mining in the FRG, thick seam mining with caving in Romania, France, India and the People's Republic of Korea, thick seam mining with stowing in France. (8 refs.) (In Russian)

Khudin, Yu.L.; Ustinov, M.I.; Churilov, A.A.; Gorbachev, D.T.

1983-01-01

337

Computerizing calculations in designing optimum structure of mining horizons in a black coal mines  

Energy Technology Data Exchange (ETDEWEB)

Reviews literature on methods of optimizing structural parameters of a mine's production horizon. A method of designing the optimum structure of mining horizons in a coal mine under given mining-geological conditions is presented. In the framework of the proposed method, called OSPW, the following optimizing problems are solved: optimizing size of mining fields located in one horizon, selecting the optimum method of opening the coal deposit in a horizon, developing the optimum order of mining the fields located in various sections of a horizon, determining the parameters characterizing the structure of a mining horizon for the analyzed systems of opening a deposit. The following parameters are considered in the OSPW method: I. natural parameters: properties of surrounding rock, methane content, water influx, types of mined coal, parameters characterizing coal seams (thickness, inclination, properties of rock layer in the direct and main roof, gassiness of the seam); II. engineering parameters: mining depth, height of a horizon, coal output per 24 h, method of deposit development within the horizon, system of coal haulage, type of supports, parameters characterizing shafts, stowing, and parameters characterizing the system of mining. The technical-economic models of a mining field and of the structure of a mining horizon are described. (24 refs.) (In Polish)

Pazdziora, J.; Karbownik, A.

1980-01-01

338

Equipment selection for high selective excavation surface coal mining  

Energy Technology Data Exchange (ETDEWEB)

The choice of which mining method to use at many large surface coal mines is often dicated by what machinery is available or what experience the mine management can offer. One of the most significant surface coal mines in Turkey is owned and operated by the Turkish National Coal Board, located to the west of the city of Kutahya. The Seyitomer Lignite Enterprise (SLE) extracts low quality coal, the majority of which is supplied to an adjacent power station. The coal seams at SLE contain bands of ash which under normal mining conditions are extracted with the coal. This increases the ash content of the run of mine coal and results in lower efficiency at the power station and financial penalties for SLE. In this paper, therefore, selection of the best possible equipment and production method was identified to achieve high selective mining at SLE. The research found that two different high selective mining methods were suitable for selective excavation of the B3 seam, which were hydraulic excavator and truck and surface miner and truck combinations. It was also found that high selective excavation could provide the desired coal quality at 52% lower costs when the whole process (excavation, transportation, processing, etc.) was considered.

Aykul, H.; Yalcin, E.; Ediz, I.G.; Dixon-Hardy, D.W.; Akcakoca, H. [Dumlupinar University, Kutahya (Turkey)

2007-03-15

339

Dewatering flooded coal mine like draining Sydney Harbour  

Energy Technology Data Exchange (ETDEWEB)

The article recalls the scale of the dewatering of the floodwaters trapped in two of the Ensham Mine coal pits in Queensland's massive Bowen Basin coal reserve when river waters inundated the mine in the January 2008 floods.

Cummings, J.

2008-07-15

340

R&D and Technological Change in Coal Mining.  

Science.gov (United States)

|This report examines the issue of research and development (R and D) as well as technological changes in coal mining, focusing primarily on deep coal mining from 1970 to the present. First, a conceptual framework for classification of R and D as well as technological change is developed. A review of the literature that gives a mixed impression of…

Baker, Joe G.

 
 
 
 
341

Use of coal mining wastes for manufacturing paving materials.  

Science.gov (United States)

This project was aimed at proving the technical feasibility of the use of coal mining wastes in the manufacturing of paving materials; floor-tiles, flags, paving-stones, grit stones, etc.. With that aim, four types of coal mining wastes were selected out ...

1999-01-01

342

Coal mining in China: policy and environment under market reform  

Energy Technology Data Exchange (ETDEWEB)

The purpose of this paper is to identify the main environmental impacts of coal mining in China, examine the main institutions and reform factors that failed the control of these damages, and discuss what would be necessary to establish a sustainable and environmentally responsible coal mining sector in the context of market and institutional reforms.

Songli Zhu; Judith A. Cherni

2009-07-01

343

Question marks of the Czech coal mining industry  

International Nuclear Information System (INIS)

[en] An overview of brown and black coal mining in the Czech Republic is presented, and problems of the extent of coal reserves and of the profitability of deep black coal mining are discussed. Costs of coal mining in foreign countries are given. Coal mining in the Czech Republic can be expected to be loss-making unless coal prices are increased. Since coal resources in the Czech Republic are limited, additional nuclear power plants will have to be constructed or else coal for power generation will have to be imported. The environmental aspects of coal mining and burning are discussed. Medium-term and long-term solutions to reduce the environmental burden include thermal power plant desulfurization, application of the fluidized-bed combustion regime to coals with large ash and/or sulfur contents, and introduction of gas in towns and power plants. In the short run, large-scale consumers in towns and coal basins should be obliged to accumulate reserves of low-sulfur coal for later use. (J.B.). 2 tabs., 3 figs., 8 refs

1995-01-01

344

The development and application of strip mining to previously mined underground coal workings  

Energy Technology Data Exchange (ETDEWEB)

This paper describes how a 'mined out' coalfield is being mined successfully by opencast methods. The coalfield is that at New Vaal Colliery, which is situated in the Vereeniging-Vanderbijlpark-Sasolburg industrial complex. All three coal seams at new Vaal had been mined previously, when the better-quality coal had been removed. The coal-preparation plant at New Vaal, which is also described, supplies coal to the 3600 MW Lethabo Power Station. The Colliery has been designed to supply 600 million sales tons of coal over its forty-year life. 13 figs., 2 tabs.

Laybourne, R.A.; Watts, R. (Anglo American Corporation of South Africa Ltd., Johannesburgh (South Africa))

1990-08-01

345

Remote methane measurement in underground coal mines  

Energy Technology Data Exchange (ETDEWEB)

The objective of the research project was to demonstrate and prove the innovative concept that remote methane detection and measurement can be undertaken by the spectroscopic method using a tuneable laser diode. The objective of the project was achieved. It was demonstrated that remote methane detection and measurement can be successfully accomplished using a tuneable laser diode to generate an infra-red beam at a wavelength of 1.6179670 {mu}m and coal, or rock types that are typical of coal mine roof strata, as the reflecting medium. It is anticipated that absorption spectroscopy using a tuneable laser diode will lead to a compact and low-cost remote methane detection and measurement device. Recommendations are made for developing the proof-of-concept device into an intrinsically safe prototype capable of detecting and measuring range-integrated methane concentrations as low as 10 ppm m at distances of up to 30 metres.

Chris Fowler [University of New South Wales, NSW (Australia)

2007-05-15

346

Variability of petrologic composition of coal during mining and preparation on the example of the Janina coal mine  

Energy Technology Data Exchange (ETDEWEB)

This paper analyzes changes in petrologic composition of coal caused by comminution during mining, loading, haulage, hoisting, screening as well as during coal preparation. The 31 type coal seam in the Janina mine is from 0.8 to 1.60 m thick. It is mined by shearer loaders (longwall system with caving). Coal size class from 30 to 200 mm is prepared in DISA heavy media separators, and size class from 0 to 30 mm is not prepared. Changes in macerals and micromacerals in coal caused by mining, haulage and preparation are shown in 4 tables. Composition of vitrinite, exinite and inertinite in coal seams, in run-of-mine coal, in the coal fed into preparation machines and in coal concentrate is analyzed. Changes in mocrolithotypes clarite, vitrite, durite, inertite, vitrinertite, trimacerite, carbominerite and of mineral matter are also discussed. Changes in vitrinite, exinite and inertinite are caused by differing properties of individual macerals (e.g. their ability to be crushed) but also by mining rock together with coal. Coal concentrate is characterized by increased content of vitrinite, and some decrease of exinite and inertinite. From among microlithotypes content of vitrite and fusite increases and content of clarite, trimacerite and durite decreases. (4 refs.) (In Polish)

Gabzdyl, W.

1981-04-01

347

Gas drainage management systems for modern coal mines  

Energy Technology Data Exchange (ETDEWEB)

Gas emission and outburst problems remain one of the major difficulties facing the world coal mining industry. Methane emission in coal mines adversely affects the efficiency of coal production and mine safety conditions. Risk can be reduced by gas drainage. The methane thus recovered is a potentially valuable energy source which if used can produce both financial and environmental benefits. The generic gas control methods of gas drainage and ventilation are common to most coal mining countries but the detailed technologies applied differ according to the geological, mining and economic conditions, and also with the magnitudes of coal production. However, the critical element of all gas drainage management systems is the management organisation which ensures allocation of responsibility and provides a systematic framework for effective application of the most appropriate technology. 8 refs., 6 figs., 1 tab.

Creedy, D.; Lunarzewski, L. [Wardell Armstrong, Newcastle-under-Lyme (United Kingdom)

2001-07-01

348

Safety at coal mines: what role does methane play?  

Energy Technology Data Exchange (ETDEWEB)

The recent Sago Mine disaster in West Virginia and other widely publicized coal mine accidents around the world have received a great deal of attention and have generated some confusion about the link between methane drainage and safety. In response, this article provides an overview of safety concerns faced by coal mines and how they do or do not relate to methane. The first section explains the variety of safety issues a coal mine must take into consideration, including methane build-up. The second section summarizes the recent coal mines accident at Sago Mine in West Virginia. The final section describes the regulatory and legislative responses in the US. 2 refs., 2 figs.

NONE

2006-04-01

349

SIMTARS assistance to mines rescue services in Queensland coal mines. [Australia - Queensland  

Energy Technology Data Exchange (ETDEWEB)

The background and capabilities of the Safety in Mines Testing and Research Station (SIMTARS) located at Redbank - Queensland, are reviewed. SIMTARS interaction with mines rescue services includes an on-call emergency gas analysis service for all Queensland underground coal mines, and a computer-assisted mine gas analysis system (CAMGAS), to provide mine staff with emergency mine gas analysis pending the arrival of SIMTAR gas analysis experts with portable gas analysis equipment. Other general support offered to the mines rescue services includes NATA accredited gas analyser calibration, and recently developed interpretative computer software packages SAFEGAS and SEGAS, now in use at a number of mines.

Dent, P.; Bell, S. (SIMTARS, Redbank, Qld. (Australia))

1991-09-01

350

Environmental impacts of brown coal surface mining and processing  

International Nuclear Information System (INIS)

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.

1991-09-25

351

Simulation of coal mining project in the Maxim Gorkij surface mine  

Energy Technology Data Exchange (ETDEWEB)

The Maxim Gorkij surface mine will opera megatonnese with the Lednice coal preparation plant and the Lednice power plant. The mine should produce 4 megatonnes of coal with 15,000 kJ/kg calorific value, 8.2 megatonnes of coal with calorific value ranging from 12,500 to 15,000 kJ/kg and 3.2 megatonnes of coal with calorific value from 10,000 to 12,500 kJ/kg which will be used as fuel by the Lednice power plant. A scheme of the mine and the transport system from the mine to the Lednice coal preparation plant is given. The following stages of coal mining are characterized: mining (with K 300 bucket wheel excavators); coal accumulation hoppers, preparation, coal storage, mine haulage by belt conveyors. Simulation is used for optimization of mining and preparation. The Monte Carlo simulation method and Tesla 2000 computers are used. Event to event procedure is applied. Computer aided optimum design of the Maxim Gorkij surface mine is presented. (3 refs.) (In Czech)

Bilwachs, M.

1982-03-01

352

Mining method decision support system in gently inclined coal seam  

Energy Technology Data Exchange (ETDEWEB)

The paper discusses the general decision making process for mining methods in gently inclined coal seams, and the general structure and frame of the Mining Method Decision Support System (MMDSS), and analyzes the construction and main contents of the database, method base, model base and their management system. An MMDSS with a good interface has been applied in coal mines in China. 1 ref., 4 figs.

Zuo, X.; Wang, Y.; Zhang, X. [China University of Mining and Technology, Xuzhou (China). Dept. of Mining Engineering

1997-12-31

353

Coal Age: second operating handbook of underground mining. Volume 4. Coal Age library of operating handbooks  

Energy Technology Data Exchange (ETDEWEB)

This book is divided into nine key areas of underground mining. Beginning with a new look at conventional and continuous mining. The book covers advanced mining techniques, longwall mining, underground haulage, and control of roof, ventilation, dust, and methane. There are also extensive sections on coal transportation, maintenance, engineering planning, management, and training. 5 tables. (DP)

Chironis, N.P. (ed.)

1980-01-01

354

Final geological and mining exploration and reasons for the brown coal mine Laško closure  

Directory of Open Access Journals (Sweden)

Full Text Available Final surface and underground geological and mine exploration data of the brown coalmine LaŠko are presented. The data refer to the period between 1978 and 1990 when most intensive and systematic exploration took place.In more than 225 years of activity, the brown coal mine Laško had many longer or shorter interruptions and oscillations of coal production. The coal from the Laško brown coal mine has always been known to be of the highest quality among the Slovenian browncoals, mostly due to its high calorific value (ARB) and low sulphur content. Because of its quality, coal sales on the domestic market were never poor. Because of the energy crisis at the beginning of the 1970-ies, the decision was made to close the mine. The mine closure took a long period in spite of the mine company plans and activities forits restructure, so that the brown coal from Laško was mined until the middle of 1992. The ultimate mine closure reasons were technical and economic conditions of underground mining.After the final decision for closing the mine was made, the production was suspended, and extended underground mine closure and surface reclamation works were carried out.

Ivan Strgar

2003-01-01

355

Health disparities of coal miners and coal mining communities: the role of occupational health nurses.  

UK PubMed Central (United Kingdom)

This article investigates how the health disparities of Appalachian coal miners and coal mining communities could be decreased through a partnership with occupational health nurses. On-site health clinics managed by occupational health nurses working in the coal mining industry are proposed as a means to improve health care outcomes. Health effects, economic considerations, environmental impacts, and U.S. coal mining legislation and regulation are examined. An epidemiological approach is presented to the unique health effects experienced by Appalachian coal miners and coal mining communities within the context of existent socioeconomic disparities. The long-standing health crisis in Appalachian coal mining communities requires a multidisciplinary approach led by occupational health nurses.

Apostle EP; O'Connell ME; Vezeau TM

2011-07-01

356

Features of fold structures in Quanjiahe Coal Mine  

Energy Technology Data Exchange (ETDEWEB)

The morphological features, combination rules and distributions of fold structures on different scales in Quenjiahe Coal Mine are analyzed systematically. The geological conditions and evolution processes which caused the development of fold structures are discussed. The study has provided the foundation for guiding the coal mining operations, and further understanding of the development of the geological structures in Weibei coal field. 1 fig., 1 tab.

Wang, Y. [Xian University of Science and Technology (China)

2000-04-01

357

Mathematical modelling of time characteristics of mining in cuts of brown coal surface mines  

Energy Technology Data Exchange (ETDEWEB)

The paper evaluates a method for forecasting advance rate of working faces in brown coal surface mines. The faces are mined by bucket wheel excavators. The forecasting method is based on computerized simulation of mining. A mathematical model used in computerized simulation as well as algorithms are described. The model is based on the assumption that a working face may be divided into a number of sections. Volume of coal to be mined in each of the sections is easy to calculate. Mining time in each section is determined considering resistance of coal to cutting, operational characteristic of an excavator and the random idle time caused by machine failures and other operational reasons. By adding mining time in each section, duration of a complete mining cycle is determined. Practical use of the method is discussed. Examples of using the forecasting method in the Maxim Gorkij surface mine are analyzed. (5 refs.)

Kalat, J.

1982-02-01

358

30 CFR 785.19 - Surface coal mining and reclamation operations on areas or adjacent to areas including alluvial...  

Science.gov (United States)

...2010-07-01 false Surface coal mining and reclamation operations on...DEPARTMENT OF THE INTERIOR SURFACE COAL MINING AND RECLAMATION OPERATIONS PERMITS...OF MINING § 785.19 Surface coal mining and reclamation operations...

2010-07-01

359

Methane recovery method in coal mine ventilation air methane  

UK PubMed Central (United Kingdom)

The invention discloses a method for reclaiming methane in ventilation air of a coal mine. According to the characteristics that the methane has small density relative to air and strong penetrability and can adsorb and desorb in coal or certain rocks, a treatment device is arranged in a wind discharge port of the coal mine the device is filled with a coal adsorbing agent the ventilation air of the coal mine is introduced to the treatment device and through continuous adsorption and desorption of the methane in the coal adsorbing agent, the methane in the ventilation air of the coal mine passes through an adsorption region and a desorption region and is collected and utilized. The method utilizes the characteristics that the methane has small relative density and strong capacity for adsorption and absorption, realizes the separation of the methane from the ventilation air of the coal mine through a physical method, reduces the emission of greenhouse gas and achieves valuable fuels and the transfer fee of the emission of the greenhouse gas. The method has simple process flow, operation steps and equipment structure, does not disturb the prior exhaust system of the coal mine and is easy to popularize and apply.

RUOBIN LI; KAIQUAN WANG

360

Coal mining in Southeast Asia; Kohlenbergbau in Suedostasien  

Energy Technology Data Exchange (ETDEWEB)

Headed by Indonesia as the chief coal-producing country in the region, South-east Asia is regarded as an aspiring coal producer and consumer. With a population of more than 500 mill. the region has recorded impressive economic growth, whereby the demand for energy also increased. Coal is one of the most important sources of energy in this region and demand is increasing rapidly. On the basis of their coal reserves Indonesia and Vietnam are regarded as potential coal exporters, which could secure the coal supply in the region. The development of the coal sector in the South-east Asian countries is confronted by some general challenges such as environmental problems, inferior coal quality and underground mining technologies. The contribution provides a brief survey of coal mining in one of the developing economic regions in Asia. (orig.)

Gautama, R.S.; Wibowo, A.P.; Ekawan, R. [Dept. of Mining Engineering, Inst. Teknologi Bandung, Bandung (Indonesia)

2006-06-29

 
 
 
 
361

Australian underground coal mining technology: technical innovations and research  

Energy Technology Data Exchange (ETDEWEB)

Underground coal mining technology in Australia is developing at such a rate that it effectively competes with open-cut mining operations. Underground coal mining contributes to about 25% of total Australian coal production and in a number of underground mines the productivity is higher than the average productivity of the Australian open-cut operations. Systems developed so far to raise underground productivity include higher production continuous miners, continuous miners with simultaneous cutting and bolting, continuous transportation and fast belt extension and retraction systems. Development in rock mechanics particularly roof bolting and support have lead to enormous change in the productivity of board and pillar systems. Longwall retreat systems with fast development of gate roadways and self-propelled vehicles have the capacity to produce 15,000 tonnes/day coal and some mines using systems are now producing 10,000 tonnes/man year average. With continuous increase in level of mechanisation, the Australian underground coal mines have enhanced their underground monitoring and communication systems and employed new technologies to monitor mining processes and communicate the relevant data to management information systems. With deepening of Australian coal mines and increase in the number of gas outbursts, many studies have been focused to develop methods and techniques to estimate the extent of gas emission from coal mining and to control gas outbursts. Investigations have also been carried out into the understanding of causes and control of goaf and pillars spontaneous combustion in underground mines. This paper discusses the recent developments in underground coal mining in Australia. 5 refs., 14 figs.

Lama, R.D.; Saghafi, A.; Battino, S. [Kembla Coal and Coke, Wollongong, NSW (Australia)

1994-12-31

362

Coal mining in the People's Republic of China  

Energy Technology Data Exchange (ETDEWEB)

Reported are: China's important coal reserves; trends in coal mining before and after the great proletarian cultural revolution; organisation of coal mining by the Minister for Coal Mining Industry and the Committee for the Revolution; aspects of safety and health protection of employees; mining and winning methods.

Berg, H.

1980-12-01

363

Byron Creek begins expansion of Coal Mountain Mine  

Energy Technology Data Exchange (ETDEWEB)

Byron Creek coal mine in the southeast corner of British Columbia is expanding. Japan is judged to be the best market for Byron Creek coal. Esso Resources Canada Ltd. is managing the coal production. Byron Creek and its expansion are discussed.

Ridley, R.S.

1983-04-01

364

Department of Mines and Energy: Queensland Coal Statistics 1998 - overview  

Energy Technology Data Exchange (ETDEWEB)

Statistics are presented for Queensland coal raw production, saleable production, mine/port stockpiles, coal exports by destination for the period January 1998 to March 1999 and average export price indices and exchange rates. Some comments are given on the trends. There follows an overview of Queensland coal statistics for the 1998 calender year.

NONE

1999-06-01

365

Selection of technological parameters in borehole mining production by technical deep drilling and hydroexploitation  

Directory of Open Access Journals (Sweden)

Full Text Available This paper shows the estimate technological parameters for borehole hydro-production of sand by technical deep drilling slim well differently diameters, where are determinate calculation of radius of jet for selects hydro-monitor, the effect of hydro-caving, caving capacity, hydro-transport of pulp and drawings of the most important parts of necessary equipment for exploitation at the mining field exemplified by experimental borerhole hydro-mining of underlying quartz sand at surface open pit mine of coal named the Polje-D in Kolubara.

Dimitrijevic Bojan; Pinka Ján; Mitrovic Vladimir

2004-01-01

366

Management of mining and distribution of coal using computer technology  

Energy Technology Data Exchange (ETDEWEB)

Stable supply of industrial users of coal, especially heating and power stations and brown coal fuel brick plants (quantity, quality and delivery time) is a vulnerable point in the brown coal industry of the GDR. There are a large number of diverse factors which influence mining and distribution of coal. Management of these factors on the whole due to their increasing complexity and dynamic nature using old methods is already impossible. Therefore the question has arisen of the necessity of using computer technology, automated data transmission and processing as the main question of support of management in the brown coal industry. The main principles of control using computer technology are discussed in the report which consists of four main parts: formulation of the problem and main conclusion; brief characteristics of the system of management of mining and distribution of coal using computers and mathematical methods; determination of main interrelationships in management and use of computers and formalized objectives in mining and distribution of coal; specialized questions of management in their interaction with mining and coal distribution (use of coal quality indicators, stored reserves, etc). Not only technical and technological questions and specific questions of computer use, but also the basic principles of management of the process of mining and recovery of coal are discussed in the report.

Neyberg, I.; Penitts, Ye.

1980-01-01

367

Present problems of coal mines safety in Romania  

Energy Technology Data Exchange (ETDEWEB)

Safety in Romanian mines remains a problem within the industry. While economic performance in Romanian mines has improved since 1989, safety standards have deteriorated. This was one of the reasons that Romania was interested in hosting the UN/ECE workshop on safety in coal mines. Mines safety law has now been made more stringent, and the industry has been made to take responsibility. Democracy should make progress easier to monitor.

Mironovici, R.; Rancea, G. [Ministry of Industry (Romania)

1996-12-31

368

Environmental impact assessment for surface coal mine - a case study  

International Nuclear Information System (INIS)

Surface coal mines being the largest contributor to the national coal production, the study of environmental impacts due to this becomes mandatory as it will help in proper planning and safe operations of the mine in an environmentally compatible manner. Within the scope of this paper, a model for preparation of comprehensive environmental impact assessment (EIA) by utilising a new evaluation methodology leading to determination of Environmental Quality Designation an index has been developed and this model has been validated by using data from a running surface coal mine in Wardha Valley Coalfield. Based on this exercise, the overall impact of the surface coal mine under consideration on environment indicates a medium level and accordingly the control measures have to be planned. Thus repair to the environment has to be made a concurrent activity with mining i.e. to say we have to design with nature not against it.

1994-01-01

369

Basic technical trends in designing organization of coal mine construction  

Energy Technology Data Exchange (ETDEWEB)

Construction of a large underground black coal mine in USSR according to existing regulations should take 7 to 8 years. In reality, however, the construction period is much longer. One of the causes of delays is low labour productivity resulting from shortcomings in mine construction design. Construction of a coal mine (without machines and equipment) costs 140 to 160 million rubles. During construction, from 2.500 to 3,000 construction workers are employed and in some periods their number increases to 4,500. Possibilities of reducing the construction period of black coal mines are evaluated. Construction of the main shaft of a coal mine takes 4 to 6 years on the average. Duration of construction can be significantly reduced when a method of two hoisting towers is used. One temporary hoisting tower is used during construction of a shaft, and the second stationary tower is constructed in the meantime. When a shaft is completed, the stationary shaft is moved on to the new location over the pit mouth. It is suggested that using this method economizes over 15,000 man days per shaft. Using new methods of shaft reinforcement, tested during ore mine construction, is also recommended. New solutions in the field of surface constructions at underground black coal mines are discussed: blocking various buildings to reduce investment and operation cost and to reduce transportation distances. Recommendations for other improvements in coal mine design are also made. (In Russian)

Meliksetov, S.S.

1980-11-01

370

Current practice of pillar design in US coal mines  

Energy Technology Data Exchange (ETDEWEB)

A survey was undertaken in late 1993 and early 1994 to gain insight into the current status of pillar-design practice in underground coal mines in the United States. A total of 552 room-and-pillar mines and 75 longwall mines were surveyed to collect general, geological and mine-plan information. The collected information was critically analyzed with special emphasis on the pillar-design criteria adopted in these mines. A safety-factor analysis was also carried out for the pillars in the room and pillar mines. 2 refs., 18 figs.

Tsang, P.; Peng, S.S.; Biswas, K. [West Virginia University, Morgantown, WV (United States). Dept. of Mining Engineering

1996-12-01

371

Geomechanical and gas-dynamics phenomena in deep coal mines  

Energy Technology Data Exchange (ETDEWEB)

Discusses problems of deep coal mining in the Donbass, where mining depth exceeds 600-800 m. Deep mine phenomena are analyzed, including roof deformation in excess of yield of mechanical supports, roof falls at mining faces, vigorous gas release, sudden rock and gas outbursts in development workings. Data collected in the Progress mine with a view to locate compression and destruction zones of coal seams are given. A new approach to analyzing stress and deformation of rock mass considering dynamics of processes arising from movement of faces is suggested. Points out that there are three main methods of preventing the formation of dangerous zones in front of face workings: stress relaxation before coal mining, reducing the length of working faces, and dividing the goaf space by rock packs. Application of each method is described. 3 refs.

Chernyak, I.L. (Moskovskii Gornyi Institut (USSR))

1991-12-01

372

The assessment of mine rebound and decanting in deeper coal mines  

International Nuclear Information System (INIS)

[en] 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.

2010-01-01

373

Revegetation of Alaskan coal mine spoils. Final report  

Energy Technology Data Exchange (ETDEWEB)

Minespoil reclamation studies were commenced in 1980 in three coal fields in Alaska. The studies included plant adaptability trials, fertilizer trails, characterization and classification of soils, and wildlife investigations. This report concerns activities undertaken through the 1984 research season regarding first three areas of study. Studies were conducted in the Nenana coal field at the Usibelli coal mine, in the Matanuska coal field at the abandoned Jonesville mine, and in the undeveloped Beluga coal field. Most of the work was conducted at the Usibelli coal mine, the largest commercial mine currently active in Alaska. The Usibelli mine is located at about 64 N latitude in the continental interior climatic region of Alaska south of Fairbanks. It spans the upper boreal forested to low alpine zones, about 460 to 760 meters elevtion. The Jonesville mine, now idle, is located near 62 N in the boreal forested zone of southcentral Alaska, about 325 meters elevation, in the upper Cook Inlet region. The Beluga coal field extends from the shores of the Cook Inlet on a gradual incline to the ramparts of the Alaska Range, transecting the forested and alpine zones about 61 N. The State of Alaska recently adopted surface coal mine regulations with requirements for mine operators to follow for the permitting process. The Alaska Division of mining is in the process of determining how these regulations are to be implemented. The results of the studies reported on herein have figured prominently in discussions between the Division and mine operators on the implementation of the new regulations. 1 fig., 26 tabs.

Mitchell, W.W.; Ping, C.L.; Mitchell, G.A.; Michaelson, G.J.; Kaija, K.J.

1985-05-01

374

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

Energy Technology Data Exchange (ETDEWEB)

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.

Vrouwe, A.

2008-12-19

375

EVALUATION OF THE ENVIRONMENTAL EFFECTS OF WESTERN SURFACE COAL MINING. VOLUME II. MINE INVENTORY  

Science.gov (United States)

This report contains a tabular summary of general information for 37 surface coal mines active in the western United States during 1975 and for seven additional mines that were under development in that year. In total, 44 mines in the following states are included: Arizona, Color...

376

Coal store for Mount Isa mines in Collinsville, Australia  

Energy Technology Data Exchange (ETDEWEB)

The Collinsville Coal Expansion Plant will handle two sorts of coal, steaming coal from the Newlands Mines south of Collinsville and coking coal from the Collinsville Mines. While the steaming coal is mainly used by nearby power stations, the coking coal is blended and washed to be exported via the new Abbot Point Coal Port. The total coal export is anticipated to be 6.5 million tons per year. Matthew Hall Engineering (Pty.) Ltd. in association with Buehler-Miag (Pty.) Ltd. of Australia are constructing the plant. The concern of Matthew Hall is the washing plant, the belt conveying system and the erection of the facilities. Buehler-Miag are supplying three stackers and one reclaimer.

Kruegel, H.H.; Vogt, D.

1983-11-01

377

Environmental management and rehabilitation of the Nabarlek Uranium Mine  

International Nuclear Information System (INIS)

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.

1997-01-01

378

Wetlands in the NB coal mine expansion project  

Energy Technology Data Exchange (ETDEWEB)

This presentation outlined the requirements of the New Brunswick Wetland Conservation Policy as they relate to the NB Coal Mine Expansion Project at Albright's Corner. Issues concerning wetland delineation, functional assessment and mitigation for project area wetlands were discussed. The expansion project was initiated as a result of recent complications with the coal seam at the Salmon Harbour Western Extension Mine. The increasing depth of the cuts and high incidence of slumping was affecting coal production at the site. This presentation described the project components as well as 2 mine options as determined by the technical expertise from wetland consultants. tabs., figs.

Cahill, K. [Gemtec Ltd., Fredericton, NB (Canada); Peck, D. [Debby Peck Botanical, Island View, NB (Canada)

2008-07-01

379

Directions for restructuring the Polish black coal mining industry  

Energy Technology Data Exchange (ETDEWEB)

Outlines the goals of reforms in the Polish black coal mining industry. Trends in domestic demand for coal and energy from 1990 to 2020 are analyzed. It is considered that the demand will increase from 93 to 116 Mt of conventional fuel or to 138 Mt (low or high scenario). Directions of improvement in the economic indices of black coal mining are analyzed (cost reduction, increased labor efficiency). Results of restructuring analyses made in four mines are presented. Selected production indices for 1992, 1995 and 2000 are provided. Employment, production and investment up to the year 2000 are discussed. 37 refs.

Zabierowski, J. (Akademia Gorniczo-Hutnicza, Cracow (Poland). Zaklad Projektowania, Budownictwa, Ekonomiki i Zarzadzania)

1993-11-01

380

Certain economic problems of planning recovery at coal mines  

Energy Technology Data Exchange (ETDEWEB)

The annual volume of recovery of individual mines, in addition to the nature of coal formations and the recovery systems in them also depends on the number of recovery sites. Operation of one or several work sites with different technology and volume of recovery represent different levels of production, results, need for capital investments and number of workers. Change in the number of working days per year, introduction of a five day work week also will change these indicators. These changes caused extremely more production alternatives at the 12 mines of the association of the Borshodskiy coal mines. Possibilities are examined for determining the economic coal composition of production among the alternative variants.

Szalai, L.

1983-01-01

 
 
 
 
381

Psycho-social aspects of productivity in underground coal mining  

Energy Technology Data Exchange (ETDEWEB)

The psychosocial aspects of productivity in underground coal mining were investigated. The following topics were studied: (1) labor productivity in deep mines and the explanations for productivity changes; (2) current concepts and research on psychosocial factors in productivity; (3) a survey of experiments in productivity improvement (4) the impact of the introduction of new technology on the social system and the way that it accomplishes production (5) a clinical study of a coal mining operation, model described how production is actually accomplished by workers at the coal face; and (6) implications and recommendations for new technology design, implementation and ongoing management.

Akin, G.

1981-10-01

382

Brief description of mining at Cardinal River Coals Ltd  

Energy Technology Data Exchange (ETDEWEB)

Underground mining at Luscar was carried out from the early 1900s to the 1950s. Metallurgical-grade coal is now produced at the Luscar Mine Site, where surface operations commenced in 1968. Present output is 3.0 million tons of clean coal per year, all mined from the Jewel Seam, which is highly folded and faulted. There are five active pits. Cardinal River Coals Ltd. maintains high standards of environmental quality control and follows a comprehensive monitoring program for air and water quality control involving dustfall stations, water management, and land reclamation.

1981-10-01

383

Some thoughts on coal mining in 2000 AD  

Energy Technology Data Exchange (ETDEWEB)

By the end of the century, it is thought that around 60% of India's coal production will come from surface mines. However, only 22% of the total mineable coal resources can be extracted using surface mining techniques. Whilst advances in technology may increase this proportion, it is likely to remain small. Underground mining is considered to be the major area of development for the next century. This will require a move away from bord and pillar techniques towards greater mechanization. The merits of mechanised longwall faces are discussed, with reference to the mining conditions found in India.

Dutta, N.; Chowdhury, S.K.

1982-10-01

384

Trends of development of surface coal mining in China  

Energy Technology Data Exchange (ETDEWEB)

The state of the art and the existing problems of surface coal mining technology are described with respect to the geological conditions in China. Based on a comprehensive evaluation of continuous surface miners (CSM) and the principles for selection of equipment, the authors have proved that the introduction of CSM with a front cutting drum into surface mining are both feasible and inevitable. Research study of mining procedure and parameters also concluded that it is technologically feasible and profitable to use the CLG type CSM, developed in China for flat and gently inclined thick seam, in Chinese surface coal mines. 4 refs., 7 figs.

Yang, R.; Zeng, Z. (China University of Mining and Technology (China))

1993-02-01

385

Role of depression service in improving coal mine ventilation  

Energy Technology Data Exchange (ETDEWEB)

Gives a general description of the work performed by the mine ventilation depression service, which was set up to assess the state of ventilation in coal mines in the USSR (according to par. 220 of the 1986 Safety Regulations, such assessments must be performed at each mine at least once every 3 years). Assessments in 1986 at 188 mines revealed serious failings: air leaks at main blowers were over twice the set norm, and internal leaks (poor quality stoppings, doors, etc.) were also twice the norm. Examples are given of identification by the service of erroneous planning decisions on ventilation taken at several Donbass mines. The information provided by the service, which constitutes a crucial link between mine planning and mine operation, is not sufficiently utilized. VNIIGD has written a computer program for the ES computer which will allow computer monitoring of all ventilation systems. This program was delivered to coal industry computer centers in 1987.

Bolbat, I.E.

1988-01-01

386

Barrier pillar between production panels in coal mine  

Energy Technology Data Exchange (ETDEWEB)

The function of the barrier pillar is to protect the mining panel in activity from the abutment load of adjacent mining panels that were mined. In the case of underground mines in Santa Catarina State, the barrier pillar has functioned to protect the main entries of the mine against pillar failure from old mining panels. The objective of this paper is to verify the application of the empirical method to design barrier pillars as proposed by Peng (1986), using numerical simulation following the mining geometry of the coal mines in Santa Catarina State. Two-dimensional numerical models were built taking into account the geometry of the main entries and mining panels for different overburden thickness, and considering the geomechanical properties for the rock mass that forms the roof-pillar-floor system for the Bonito coal vein. The results of the simulations showed that the empirical method to determine the barrier pillar width is valid for the studied coal vein and considered mine geometry. Neither did the pillar at the main entry become overstressed due to adjacent mine panels, nor did the roof present any failure due to stress redistribution. 9 refs., 6 figs., 5 tabs.

Zingano, Andre Cezar; Koppe, Jair Carlos; Costa, Joao Felipe C.L. [Universidade Federal do Rio Grande do Sul, Porto Alegre (Brazil)

2007-07-01

387

AC flame-proof motors for underground mining of coal  

Energy Technology Data Exchange (ETDEWEB)

Extensive mechanisation of coal mining is needed. The new economic policy of globalisation and technology upgradation will not only enhance coal demand but will compel the mining industry to go for modern technologies. The proportion of output from underground mining compared to opencast will have to be moderated to keep pace with the demand, productivity and price of coal. AC and DC motors and generators have been used in equipment like excavators, shovels, draglines, OB drills, mine-winders etc. for open cast mining. Safety is a major consideration for underground mines, where fire and roof collapse, water logging and explosive/inflammable atmosphere are common. AC flame proof induction motors are considered most suitable drives for coal-cutting, conveyors, power packs, fans, pumps etc. in the underground mines. 80% of coal reserves in India are underground. Present production from underground mines is about 1/3rd of total coal output. The traditional manual and partly mechanised Bord and Pillar methods, are used. The modern mechanised technique is Long Wall Face, responsible for 65% of underground output the world over. LWF methods were introduced in India in 1978. As per the projections of 70s, some 90 LWFs should have been operating, but only some 18-20 can be counted. These are contributing an output of the order of 4% of total production from underground operations. Liberalised new policy is expected to facilitate the import of equipment, but the development of indigenous equipment for Long Wall Faces is also expected to be favoured when it comes to initial capital investment, standardisation, availability of maintenance spares and resultant price of coal. The paper describes the developments and scope of application to coal sector, in the area of Electrical Machines, in particular the AC flame proof induction motors for underground mining, in the context of changed scenario. 6 refs., 3 tabs.

Bhargava, A.K. (BHEL, Hardwar (India))

1994-01-01

388

Pneumatic automation systems in coal mines  

Energy Technology Data Exchange (ETDEWEB)

The authors describe the results of creating and implementing: pneumatic systems for automating stoping equipment, machinery and mechanisms (apparatus for the automatic remote control of ANShch-AShchM shielding units, a PUSK for controlling excavation cutter-loaders with a pneumatic drive for operation on steep seams, the PAUZA for automatic regulation of the efficient D3M-2 chambered filling and stowing machine, and other); ways of ensuring safety (the GROT pneumatic device for the individual cooling of the mine work area under conditions present at great depths, and others). The principles of using pneumatic control systems during underground exploitation are examined, as are the prospects of developing pneumatic automation in the coal industry.

Shmatkov, N.A.; Kiklevich, Iu.N.

1981-01-01

389

Recent developments in coal mine gas monitoring technology  

Energy Technology Data Exchange (ETDEWEB)

Australian underground coal mines are regularly plagued by potentially lethal methane or hybrid methane coal dust explosions. In Queensland, four major explosions involving significant fatalities have taken place over the past twenty-five years. The Safety in Mines Testing and Research Station (SIMTARS) was established by the Queensland Government in 1986 to conduct research into the prevention of coal mine fires and explosions. This paper deals with four initiatives developed by SIMTARS which are now extensively used by coal mines in Australia to detect and minimise the impact of spontaneous combustion-related fires and explosions. They are: (1) the gas explosibility software package - SPLUS; (2) computer assisted mine gas analysis system (CAMGAS) and EZGAS which are now installed at all Queensland coal mines; (3) SAFEGAS, the mine environmental monitoring software which enables collected gas data to be utilised to provide a comprehensive mine gas alarm regime; and (4) the derivation of a fire ladder which prioritises the individual gases emitted prior to the commencement of a spontaneous combustion. 7 refs., 19 figs.

Bell, S.; Cliff, D.; Hamilton, J.; Glaum, F. [SIMTARS, Redbank, Qld. (Australia)

1997-12-01

390

The role of the state coal mining enterprise in Indonesia  

International Nuclear Information System (INIS)

[en] 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

1991-01-01

391

Proceedings 79th regular meeting: Rocky Mountain Coal Mining Institute  

Energy Technology Data Exchange (ETDEWEB)

The proceedings of the June 1983 conference of the Rocky Mountain Coal Mining Institute include organizational information and the speeches given during the two days of sessions. The conference addressed the current status and future of the coal industry, with individual papers dealing with general topics of policy and regulation and with specific types of mining, coal handling, and transport. Emphasis was given to the prospects for western coal development. Separate abstracts were prepared for 11 papers, six of which were selected for Energy Abstracts for Policy Analysis (EAPA) and 11 for the Energy Data Base (EDB).

Finnie, D.G. (ed.)

1983-01-01

392

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

Directory of Open Access Journals (Sweden)

Full Text Available In order to solve the problem of "under three" (under railways, buildings and water bodies) coal pillar mining, analysis on backfill mining and strata movement law is carried on in 24 mining district of Zhouyuanshan coal mine. First of all, according to the engineering geology and strata occurrence condition in 24 mining district of Zhouyuanshan coal mine, FLAC2D software be used to establish a two-dimensional numerical model and to analyze and calculate the full caving method, strip method and backfill method and then gaining that backfill mining method is beneficial to improve the protection level of surface buildings and facilities. Then, using the theory of strata control and method of related mechanics to analyze the strata movement law and strata control principle of backfill mining, considering that supporting role of backfill body is mainly on lateral reinforcement of coal pillar and vertical supporting role of overlying strata, forming a cooperative control system of "bearing strata + coal pillar + backfill body" and deducing the equilibrium equations when it is in steady state. At last, using the numerical analysis method, respectively analyzing the surface subsidence of the corresponding important buildings of the three profiles of C-8 exploration line ,C-6 exploration line and A-A (cross section of the profile of C-8 exploration line) after using backfill coal mining in 24 mining district. The results show that: the surface subsidence and horizontal deformation basically control within 30 mm and the surface deformation curvature of buildings generally in 0.1×10-3 /km in 24 mining district of Zhouyuanshan coal mine, which accord with the relevant standards and requirements.

Weijian Yu; Bo Xu; Tao Feng; Xinyuan Chen

2013-01-01

393

Bucket wheel excavator systems in open-pits 'New Vaal' and 'CDM'/South Africa  

Energy Technology Data Exchange (ETDEWEB)

On the basis of equipment installed in the open-pits 'New Vaal' and 'CDM', two continuously operating bucket wheel excavator systems are described in the following, the first of these with conveyor system as so-called 'Around-the-pit system' and the second as 'Cross-pit-system'. Both systems show the flexibility and adaptability of bucket wheel excavator systems. The first example outlines the possibilities of combining modern bucket wheel excavators with other mining systems in one and the same open-pit, and the second example the possibilities of extending bucket wheel excavator systems by the best possible utilization of existing equipment components for making up new systems. (orig./HS).

Truemper, R.

1989-05-01

394

Environmental problems in Russian coal industry  

Energy Technology Data Exchange (ETDEWEB)

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.

Kharchenko, V.; Oumnov, V. [Moscow State Mining University, Moscow (Russian Federation)

1996-12-31

395

Cyprus coal buys into mining's big time  

Energy Technology Data Exchange (ETDEWEB)

Cyprus Coal's rapid growth during the past six years has come entirely through buyouts of operating properties. It has been so successful that the company today ranks among the top 15 US coal producers. The headquarters of Cyprus Minerals is in Denver and the company is composed of three corporate entities: Cyprus Metals Co.; Cyprus Industrial Minerals Co.; and Cyprus Coal Co. The paper outlines company history - mainly consisting of acquisitions and the profit and loss variations throughout its first year. The coal division of Cyprus Minerals contribution to profits, productivity in Cyprus Coal, expansion plans for Cyprus Coal, roots of Cyprus Minerals in the Mediterranean and the strategy of selectivity of acquisitions are discussed. The paper also describes the operations acquired by Cyprus and these are as follows: Empire Energy; Yampa Valley Coal; Plateau Mining Co.; Emerald; Knox Creek Coal Corp.; Mountain Coals Inc.; Straight Creek Resources; and Cumberland Mountain Coal Co.

Merritt, P.C.; Brezovec, D.

1986-10-01

396

Environmental losses vis a vis efficiency of coal deposit mining  

Energy Technology Data Exchange (ETDEWEB)

Analyzes efficiency of underground black coal mining in Upper Silesia considering the economic losses caused by environmental effects of mining. Three methods for calculating environmental damage are comparatively evaluated: based on calculating the damage paid for by coal mines, so-called real losses (damage paid for by the mines and losses in other branches of the national economy), real losses reduced by so-called irrational losses. Environmental losses associated with the following stages of mining or effects of mining are evaluated: waste storage, damage or deformation of buildings or structures caused by ground subsidence, effects of mining on health of inhabitants, on railways, waste water discharge, losses in agriculture and forests, etc. Depending on the calculation method used, environmental losses associated with mining range from 4,190 zloty/t to 28,040 zloty/t. The cost of closing unprofitable coal mines in Upper Silesia, as recommended by some experts, is analyzed. Environmental losses and the price of black coal are evaluated. 7 refs.

Piontek, F. (Glowny Instytut Gornictwa, Katowice (Poland). Zaklad Ekonomiki Gornictwa)

1993-01-01

397

Characterization and effectiveness of remining abandoned coal mines in Pennsylvania  

Energy Technology Data Exchange (ETDEWEB)

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.

Hawkins, J.W.

1995-12-31

398

Environmental impacts of coal mining and coal utilization in the UK  

International Nuclear Information System (INIS)

[en] Coal has remained the main source of energy in the UK from 1700 to the end of 1970s, and it still plays an important role in the power generation. The paper discusses the current coal consumption in the UK together with environmental impacts of coal mining, coal processing and coal utilisation for power generation. Since coal remains the single biggest contributor to greenhouse gases worldwide, methods for minimising environmental impacts of coal combustion are described in this paper including systematic application of the principles of clean coal technologies financed by the private sector. (authors)

2010-01-01

399

Correlation of Risk Analysis Method Results with Numerical and Limit Equilibrium Methods in Overall Slope Stability Analysis of Southern Wall of Chadormalu Iron Open Pit Mine-Iran / Korelacja wyników analizy ryzyka z wynikami oblicze? numerycznych oraz wynikami uzyskanymi w oparciu o metod? równowagi granicznej zastosowanych do badania stabilno?ci wyrobiska pochy?ego na po?udniowej ?cianie odkrywkowej kopalni rud ?elaza w chadormalu w Iranie  

Science.gov (United States)

Slope stability analysis is one of the most important factors in designing open pit mines. Therefore an optimal slope design that supports both aspects of economy and safety is very significant. There are many different methods in slope stability analysis including empirical, limit equilibrium, block theory, numerical, and probabilistic methods. In this study, to analyze the overall slope stability of southern wall of Chadormalu iron open pit mine three numerical, limit equilibrium and probabilistic methods have been used. Software and methods that is used for analytical investigation in this study are FLAC software for numerical analysis, SLIDE software and circuit failure chart for limit equilibrium analysis and qualitative fault tree and semi-quantitative risk matrix for probabilistic analysis. The results of all above mentioned methods, was a circular failure occurrence in Metasomatite rock zone between 1405 to 1525 m levels. The main factors of failure occurrence in this range were heavily jointing and existing of faults. Safety factors resulted from numerical method; Circular chart method and SLIDE software are 1.16, 1.25 and 1.27 respectively. Regarding instability and safety factors in Metasomatite rock zone, in order to stabilize the given zone, some considerations such as bench angle and height reduction should be planned. In results of risk matrix method this zone was mentioned too as a high risk zone that numerical and limit equilibrium methods confirmed this. Badanie stabilno?ci wyrobiska pochy?ego jest jednym z najwa?niejszych czynników uwzgl?dnianych przy projektowaniu kopalni odkrywkowych. Optymalne zaprojektowanie wyrobiska pochy?ego z uwzgl?dnieniem czynników ekonomicznych oraz bezpiecze?stwa jest niezmiernie wa?ne. Istnieje wiele metod badania stabilno?ci wyrobiska pochy?ego, mi?dzy innymi metody empiryczne, metoda równowagi granicznej, teoria bloków oraz metody numeryczne i probabilistyczne. W pracy tej omówiono zastosowanie trzech spo?ród tych metod: metody numerycznej, równowagi granicznej oraz metody probabilistycznej, do analizy stabilno?ci wyrobiska pochy?ego na po?udniowej ?cianie kopalni rud ?elaza w Chadormalu w Iranie. Oprogramowanie wykorzystane w badaniach analitycznych to pakiet FLAK przy metodzie numerycznej, oprogramowanie SLIDE oraz wykresy ko?owe przy metodzie równowagi granicznej oraz jako?ciowe drzewa okre?laj?ce wyst?powanie uskoków i pó?-jako?ciowe macierze ryzyka przy metodzie probabilistycznej. Wyniki uzyskane w oparciu o trzy wy?ej wymienione metody wykaza?y wyst?pienie zawalenia si? ska? metasomatycznych na poziomie od 1405 do 1525 m. G?ównymi czynnikami warunkuj?cymi zawalenie si? ska? w tym regionie by?a obecno?? licznych p?kni?? oraz uskoków. Wska?niki bezpiecze?stwa uzyskane przy pomocy metod numerycznych, wykresu ko?owego oraz oprogramowanie SLIDE wynios?y kolejno: 1.16, 1.25, 1.27. W odniesieniu do niestabilno?ci w rejonie ska? metasomatycznych, aby uczyni? t? stref? bardziej stabiln? nale?y uwzgl?dni? takie czynniki jak k?t nachylenia ?awy oraz obni?enie wysoko?ci. Analiza przeprowadzona w oparciu o macierze ryzyka wykaza?a, ?e strefa ta jest stref? wysokiego ryzyka, za? wyniki analizy numerycznej oraz wyników uzyskanych przy pomocy metody równowagi granicznej w pe?ni ten wniosek potwierdzi?y.

Ahangari, Kaveh; Paji, Arman Gholinezhad; Behdani, Alireza Siami

2013-06-01

400

Advanced preparation of coal bearing strata for mining. [USSR  

Energy Technology Data Exchange (ETDEWEB)

Methods for coal seam degassing used in the Donbass are discussed. Two degassing methods are compared: degassing the overlying coal bearing strata by a system of long boreholes drilled from underlying workings; degassing underlying strata by a system of long boreholes drilled from a special degassing level. The latter method is used for degassing groups of thin coal seams at large depths. Degassing systems used by the 2 methods are shown in 5 schemes. Advantages of degassing the underlying seams from a special mining level are: increased degassing efficiency, reduced degassing cost (in comparison to degassing boreholes drilled from the ground surface), possibility of repeating degassing procedure, degassing all the seams of a group (including extremely thin seams which will not be mined and which after roof caving increase methane emission to underground workings), halving length of mine drivage in a mining level. Economic aspects of coal seam degassing using a special degassing level are also discussed. 3 references.

Kuklin, B.K.; Lepikhov, A.G.; Gershun, O.S.; Chepenko, A.V.

1984-03-01

 
 
 
 
401

A device for automatic gas protection for coal mines  

Energy Technology Data Exchange (ETDEWEB)

A device is proposed for automatic gas protection for coal mines, which contains a methane test sensor, a methane concentration change speed meter, a threshold unit for the lower limit of the speed of change.

Azbel, M.D.; Basovskiy, B.M.; Birenberg, I.E.; Goliy, V.Ye.; Gusev, M.G.; Karpov, Ye.F.; Marchenko, A.A.; Nazarenko, V.I.

1980-02-29

402

Longwall Mining Principles for Safely Working Steep Coal Seams.  

Science.gov (United States)

This report summarizes the principles of safely working steep coal seams using longwall mining methods. The report presents the state of the art and identifies the problems that result from seam inclination. Details are given on foreign longwall faces ach...

R. F. J. Adam W. J. Douglas B. J. Reese

1981-01-01

403

Application of equipment performance diagnostic technology in coal mining industry  

Energy Technology Data Exchange (ETDEWEB)

This paper describes the development and application of equipment performance diagnostic technology in coal mining and discusses the possible application of equipment diagnostic technology in equipment maintenance. 1 fig.

Wang, S.; Li, J. (Association of Coal Mining Equipment Management (China))

1994-03-01

404

Cardinal River mine: the Jewel of western coal  

Energy Technology Data Exchange (ETDEWEB)

Cardinal River mine produces a high quality medium volatile metallurgical coal. The only minable seam at Cardinal River is the Jewel seam. Current operations at this site are reviewed. The preparation plant and reclamation program are also discussed.

Davies, M.

1984-11-01

405

Mining geophysical methods in service of up-to-date mining and the safety mines at the Oroszlany Coal Mines  

Energy Technology Data Exchange (ETDEWEB)

The geoelectric sounding method used for detecting tectonic disturbances is described and the coal quality maps obtained with the aid of this method are presented. The determination of calorific value distribution of the coal seams and the tomographic determination of seismic absorptions in practice are also discussed. A brief survey is presented on the geothermic measurement method used for detecting underground water courses. Examples are enumerated from the Oroszlany Coal Mines. The new instruments for geoelectric sounding, for rock surface temperature measurement and underground temperature measurements are described.

Csokas, J.; Dobroka, M.; Gyulai, A.; Ormos, T.

1987-01-01

406

Fugitive coal mine methane emissions at five mining areas in China  

Energy Technology Data Exchange (ETDEWEB)

Large quantities (about 28 billion m{sup 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.

Su, S.; Han, J.Y.; Wu, J.Y.; Li, H.J.; Worrall, R.; Guo, H.; Sun, X.; Liu, W.G. [CSIRO Advanced Coal Technology, Kenmore, Qld. (Australia)

2011-04-15

407

Mining of Coal Pillars Using the Drilling Method  

Directory of Open Access Journals (Sweden)

Full Text Available An assessment of possibilities of utilizing other coal mining methods not used yet under conditions of rock and gas outbursthazard in the Ostrava-Karviná 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 [1]. Specifically, it was the case of mining of residual pillars blockinga considerable quantity of coal.What was chosen was a promising mining method utilising long large diameter boreholes. In the article the experienceof application of this mining method abroad as well as under conditions of OKR in seams with a hazard of rock and gas outburstsis presented.

Milan Stoniš; Vlastimil Hude?ek

2009-01-01

408

Analysis of possibilities of concentrating mine operation in deep coal mines on the example of the Halemba mine  

Energy Technology Data Exchange (ETDEWEB)

Discusses longwall mining in the Halemba mine with mining depth to 1,000 m and coal seams prone to rock bursts. Since 1985 the Halemba mine has been characterized by the highest rock burst hazards in Poland. Rock burst hazards are associated with large mining depth, complicated geology, rock strata structure, natural rock burst hazards, high coal output of longwall faces and high advance rate. Methods for rock burst forecasting (test borehole drilling, measuring volume of cuttings from each test borehole, acoustic monitoring, etc.) and methods for rock burst control (stress relaxation by shock blasting) are analyzed. Effects of face advance rate on degree of rock burst hazard and stress concentration in a coal ribside are investigated. The increase achieved in longwall advance and coal production is pointed out.

Bednarek, M.; Sieczkowski, W. [Kopalnia Wegla Kamiennego Halemba (Poland)

1992-12-31

409

Capture and Use of Coal Mine Ventilation Air Methane  

Energy Technology Data Exchange (ETDEWEB)

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).

Deborah Kosmack

2008-10-31

410

Participative ergonomics for manual tasks in coal mining  

Energy Technology Data Exchange (ETDEWEB)

This case study describes the implementation of the Participative Ergonomics for Manual tasks program (PErforM) at 12 surface and underground coal mines. More than 400 miners have been trained in manual tasks risk assessment and control. This paper describes the project outcomes, presents examples of the risk assessment undertaken and resulting control suggestions; and discusses the lessons learned about the implementation of participative ergonomics programs in coal mining. 17 refs., 2 tabs.

Burgess-Limerick, R.; Straker, L.; Pollock, C.; Dennis, G.; Leveritt, S.; Johnson, S. [University of Queensland, Qld. (Australia). School of Human Movement Studies

2005-07-01

411

Coal mine enterprise integration based on strategic alliance  

Energy Technology Data Exchange (ETDEWEB)

The relationship between coal mine and related enterprise was analysed. Aiming at the competitive world market as well as the dynamic requirement, a coal mine enterprise integration strategy and a enterprise strategic alliance were proposed for the product providing service business pattern. The modelling method of the enterprise strategic alliance was proposed, including the relationship view model, information view model and business process view model. The idea of enterprise strategic alliance is useful for enterprise integration. 6 refs., 2 figs.

Zhou, Q.; Sun, J.; Xu, S. [Tsinghua University, Beijing (China). Dept. of Computer Science and Technology

2003-07-01

412

Coal Mining Research Company 1987-88 annual report  

Energy Technology Data Exchange (ETDEWEB)

The Coal Mining Research Company (CMRC) provides engineering services and technology research and development for a broad range of applications in coal mining and related areas. CMRC is a small, private, non-profit company specializing in applied RandD and technology transfer with short-term payback to industry as well as offering medium-term research and development services to government agencies and private industry.

1988-01-01

413

Selenium transformation in coal mine spoils. Quarterly report  

Energy Technology Data Exchange (ETDEWEB)

The objective of this part of the study is to investigate the oxidation-reduction (redox) environment that favor the release of selenium from coal mine spoils. It is anticipated that the study will help answer critical questions as to the form, solubility, and mobility of selenium from the spoil site to the surrounding environment. This investigation will evaluate the conditions which favor the speciation of selenium from coal mine spoils as affected by changes in the oxidation states of selenium.

Atalay, A.; Koll, K.J.

1990-09-01

414

Land utilization and recultivation at the Turow brown coal mine  

Energy Technology Data Exchange (ETDEWEB)

Characterizes mining and geological conditions at the Turow mine with respect to the environment. The balance resources of coal are 730 million Mt as of 1991. Stripping ratio is 4:1. Production is 16 Mt/a. Mine depth is about 180 m. Mine area occupied up to 1990 is 4,324 ha. The structure of land use and management is discussed. Land recultivation procedures are described (neutralization, fertilization, afforestation, plants used). It is concluded that the recultivation work at the Turow mine should be reoriented from agriculture to afforestation because of significant land contamination. 5 refs.

Mazurek, C. (Poltegor-Projekt, Wroclaw (Poland))

1992-01-01

415

Selection of large diameter drills with the aid of a computer, between diesel and electric alternatives for sedimentary mining. Seleccion de perforadoras de gran diametro con ayuda de ordenador, alternativa diesel electrica en mineria sedimentaria  

Energy Technology Data Exchange (ETDEWEB)

The communication develops a rotary drill rig selection study carried out in Mina Emma, ENCASUR Puertollano (Open pit coal mine), for diameters extended from 9 7/8 to 15 inches and bench heights 10, 15 and 20 meters. Since the choice of diameters is in the transition area from diesel to electric machines, the conclusions are specially interesting in making buying decisions of this kind. 6 figs., 6 tabs.

Colomo Gomez, M. (ENCASUR, Ciudad Real (Spain))

1988-01-01

416

System for coal seam mining by crushing seam rib side  

Energy Technology Data Exchange (ETDEWEB)

The Institute for Geophysics of the Academy of Sciences of the Ukrainian SSR is developing a new mining system for coal seams from 0.4 to 1.2 m thick with dip angles ranging from 35 to 90 degrees. The seams are mined along the strike. Coal resistance to cutting is reduced by explosive fracturing (the charges are placed in long boreholes parallel to the face drilled from one of the gate roads). The mining system consists of a plow-type cutting element and a system of pneumatic balloons. Coal is cut by a wedge-shaped cutter with wedge angles from 10 to 30 degrees and wedge spacing from 300 to 500 mm. A coal layer is separated from the face by the wedge which causes intensive fissure formation, separation of the coal layer and its fracturing by the moving wedge-shaped cutter. Pneumatic balloon system guarantees efficient strata control at a working face, control of balloon position at the face and balloon advance in groups. Balloon design is shown in a scheme. Pneumatic balloons are advanced by increasing or reducing air pressure in 3 groups of balloons used in each support unit. The system is used for manless mining of thin coal seams. A set of mining equipment costs 2.5 times less than conventional systems for thin seam mining. It is assumed that the pneumatic balloons will guarantee support strength from 1200 to 1500 kN per meter of working face.

Zhurba, A.N.; Girs, A.A.; Momot, E.P.

1986-01-01

417

Energy use benchmarks for open cut coal mines  

Energy Technology Data Exchange (ETDEWEB)

Energy studies have been undertaken at a number of open cut coal mines in the Hunter Valley, New South Wales. This paper discusses the objectives and findings of the studies. The objective of the studies were to produce credible and meaningful information for coal mine management and the electricity industry that would result in increased energy productivity for mine establishments. It was found that energy efficient data can be used as a management tool to improve overall mine performance as well as to reduce energy consumption and thus lower operating costs. A range of energy efficiency benchmarks and targets have been established, which, when applied across coal mines, still assist in leading to a significant improvement in energy efficiency in the coal mining industry, thereby leading to an improvement in environmental performance. Given the current pricing differential between electricity and diesel, greater use of electricity in all facets of mining operations leads to lower overall energy costs. This observation was drawn from the performances of the individual mine sites making allowances for the possible improvements in energy use at each location. 4 tabs. 3 refs.

Cooke, D. [Denis Cooke and Associates Pty Ltd., Carlingford, NSW (Australia); Randall, C. [C Randall and Associates Pty Ltd., Newcastle, NSW (Australia)

1995-12-31

418

Environmental practice in Indian coal mines - a status report  

Energy Technology Data Exchange (ETDEWEB)

This article discusses the environmental practice in Indian coal mines under the following headings, main surface fans, auxiliary ventilation system, dust control and dust sampling, heat and humidity problems, methane emission and control, mine fires and application of nitrogen for inertisation, and environmental monitoring. 9 refs.

Banerjee, S.P.

1987-08-01

419

Reclamation, treatment and utilization of coal mining wastes  

CERN Document Server

Destined to become a major reference work, this book presents a wide range of specialist papers on the exploitation of coal mining wastes (minestone). Up-to-date developments and research results are reported from all over the world, providing a wealth of information for civil and mining engineers, environmentalists, and land reclamation specialists.

Rainbow, AKM

2012-01-01

420

Coal mining research in Australian universities and the Centre for Mining Technology and Equipment  

Energy Technology Data Exchange (ETDEWEB)

The paper reviews work currently in progress within universities and within the Centre for Mining