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1

Open-pit mining of hard coal  

Energy Technology Data Exchange (ETDEWEB)

The district of Angara-Jenissej in East Siberia is supported to contain the most promising coal supplies of the Soviet Union. They are stocked in a way that they can mainly be extracted in open-pit mining, as was communicated by the first representative of the Minister for the Coal Industry, Wladimir Bely. Complex large-scale plants shall be built under the extreme climatic conditions, in which the coal shall not only be extracted but also processed on the spot which means liquefied and turned to gas and electricity.

Bely, W.

1982-10-08

2

An analysis of storage technology and coal-loading at the Kuzbas open-pit mines  

Energy Technology Data Exchange (ETDEWEB)

The uneven output of open-pit mines and the uneven delivery of empty rock wagons used for loading resulted in the fact that coal storage areas appeared at all the Kuzbas open-pit mines. The areas were being converted from emergency to continuously active areas. The amount of coal being stored in recent years has been continuously increasingly, and, in 1980, attained 5 mil., according to the ''Kemerovougol'' industrial association--or that representing 38 24-hr. production days. The open-pit mines are characterized by an uneven output. The output of the mine varied from 1/5 of a month's production in the first decade to 2/3 of a month's production in the third decade. Given these conditions, the technology and mechanization of loading and unloading operations at the coal storage areas of the Kuzbas open-pit mines which have not undergone any changes in the last 20-30 years do not satisfy contemporary requirements. Cyclic-operation equipment with low production is used, causing significant overgrinding of the coal (of as much as 28% or more) and a significant decrease in the output of sorted coal. The analysis made underlines the need for the rapid development of operations related to improving and developing new technological systems and specialized ways of mechanizing the loading and storing systems of the Kuzbas open-pit mines.

Protasov, S.I.; Shvydkin, A.V.

1981-01-01

3

Space-time relationship between end-slope coal extraction and dumping and mining of open-pits  

Energy Technology Data Exchange (ETDEWEB)

Based on the analysis of the space-time relationship between end-slope coal extraction and dumping and mining of open-pit in Anjialing Surface Mine, the effect of mining, stripping and dumping of open-pit on the main technical parameters of end-slope coal extraction in time and space, such as mining intensity and recovery coefficient, was investigated. The research result is of general significance to the surface mines which are mining flat seams. 5 figs.

Shang, T.; Shu, J.; Cai, Q.; Che, Z. [China University of Mining and Technology, Xuzhou (China). College of Energy Science and Engineering

2001-01-01

4

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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

Ahmad, Shakeel

2013-01-01

5

An application of the analytic hierarchy process in equipment selection at Orhaneli open pit coal mine  

Energy Technology Data Exchange (ETDEWEB)

Equipment selection is one of the most important factors in open pit design and production planning. Equipment selection also affects economic considerations in open-pit design as a function of plan location and depth. Furthermore, equipment selection is a complex multi-person, multi-criteria decision problem. The group decision-making process can be improved by a systematic and logical approach to assess priorities based on the inputs of several specialists from different functional areas within the mine company. The analytic hierarchy process (AHP) can be used by decision-makers with different conflicting objectives to arrive at a consensus decision. In this paper, the selection of a loading-haulings system using an AHP-based model was evaluated for coal production in an open pit coal mine located Orhaneli, in western Turkey. The use of the proposed model indicates that it can be applied to improve group decision making in selecting equipment that satisfies optimal specifications. Also, it is found that the decision process is systematic and that using the proposed AHP model can reduce the time taken to select optimal equipment.

Bascetin, A. [Istanbul University, Istanbul (Turkey). Mining and Engineering Dept.

2004-09-01

6

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

1998-06-01

7

Empirical valuation of a process to homogenize brown coal properties at storage yards of the Belchatow open pit mine  

Energy Technology Data Exchange (ETDEWEB)

The method of investigating the process of homogenizing brown coal properties at storage yards of the Belchatow open pit mine are described and the results are discussed in detail. The estimated values of the degrees of inhomogeneity and homogeneity of the brown coal are given, the latter being the quality coefficient of the investigated process.

Lazowski, A.

1986-08-01

8

Open pit mining of uranium  

International Nuclear Information System (INIS)

The Jackpile--Paquate Mines of the Anaconda Company are on the Laguna Indian Reservation midway between Grants and Albuquerque, New Mexico. The open pit mining of uranium ore at those mines is conducted in three separate operations (stripping, mining, and ore haul)

1977-10-01

9

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

Science.gov (United States)

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. PMID:22054578

Huertas, José I; Huertas, María E; Izquierdo, Sebastián; González, Enrique D

2012-01-01

10

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

1994-04-24

11

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

Science.gov (United States)

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

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

2013-12-01

12

Modern mining technologies used in lignite open-pit mines  

Energy Technology Data Exchange (ETDEWEB)

A world wide analysis is given of existing directions in the field of the open pit mining of lignite fields. A number of engineering achievements relating to production technology are discussed. Recommendations are given on the technology of lignite mining in the open pit mines of Romania.

Fodor, D.; Rotunjanu, I.

1979-01-01

13

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

14

Special features of cutting coal beds of complex composition in open-pit mine areas and a procedure of finishing them off  

Energy Technology Data Exchange (ETDEWEB)

An analysis of the process of cutting out the open-pit mines areas of the existing and future open-pit mines of Kuzbas is presented, and the advantages of finishing them off using individual operating concerns which ensure the best mining system and savings for state facilities are pointed out.

Bereznik, M.M.

1980-01-01

15

Millennium Open Pit Mine, Alberta, Canada  

Science.gov (United States)

Near Fort McMurray, Alberta, Canada, on the east bank of the Athabasca River, are found the Steepbank and Millennium mines. These open pit mines produce oil sands that are processed to recover bitumen, and then upgrade it to refinery-ready raw crude oil, and diesel fuel. The ASTER images were acquired September 22, 2000 and July 31, 2007, cover an area of 22.5 x 25.5 km, and are located near 57 degrees north latitude, 111.5 degrees west longitude. The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

2007-01-01

16

Influence of cultivation measures on the development of vegetation and nutrient ratios in spoil banks from brown-coal open-pit mining at Borken/northern Hessen  

International Nuclear Information System (INIS)

Spoil banks from open-pit brown-coal mining at Borken in northern Hessen are extremely acidic and depleted in nutrients. This material was mixed with neutralizing cellulose ash. For initial fertilization, N, P_2O_5 and K_2O were applied at the same time as the seeding mixture. Seeding mixtures used were ''Dauerweide'', containing fast-growing species, and ''Boeschungssaat'', containing undermanding species. The fact that no top soil was applied resulted in increasing gaps and decreasing production rates in the plant stands. This work aimed to investigate how plant stands and the soil material develop after revegetation measures without application of topsoil. (orig.)

1989-01-01

17

Improving bulldozer operations in open pit mines  

Energy Technology Data Exchange (ETDEWEB)

Bulldozers are widely used at open pit mines in the USSR and abroad. Experience shows that the basic trends for increasing the effectiveness of bulldozer operations is a change in the design of the operational equipment, the basic tractor, the control system and the selection of a rational technology. Recommendations are cited for using a tractive operational mode of the base tractor for ensuring a constant productivity of a tractor and bulldozer unit during its operation in a complex with other mining transport and enrichment equipment. A technique is proposed for determining the fields of rational use of bulldozers with fixed and turning blades during movement of loosened rocks. The issues of using radio controlled and paired bulldozer units are examined.

Poskotinov, O.V.; Grossov, L.F.

1983-01-01

18

Open Pit Mining Extraction and Ore Transportation Methods.  

Science.gov (United States)

Open pit transportation has an important role in the open pit mining business. In some cases, the transportation has a 50% slice of total operating costs. Therefore, it is important to carefully calculate the most economic transportation method for the sp...

P. Pitkaenen

1998-01-01

19

Nature-oriented open coal mining technologies using mined-out space in an open-pit. Part II: A method for selecting rational sequence of mining flat dipping stratified deposits  

Energy Technology Data Exchange (ETDEWEB)

A method is proposed for selecting a rational mining sequence with internal dumping for flat stratified deposits, using new principles of the open-pit process-space formation and development. The main criteria for substantiating the mining sequence are geometrical form and development direction of the open-pit space, structure of the working wall and transportation network, internal dumping capacities and mining earthworks volumes.

Molotilov, S.G.; Norri, V.K.; Cheskidov, V.I.; Mattis, A.R. [Russian Academy of Sciences, Novosibirsk (Russian Federation). Inst. of Mining

2007-01-15

20

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

Science.gov (United States)

In this paper, particular attention was paid to the presence of aerosol solid particles, which occurred mainly as a result of exploitation and coal combustion in the thermal power plants of the Kolubara basin. Not all of the particles created by this type of anthropogenic pollution have an equal impact on human health, but it largely depends on their size and shape. The mineralogical composition and particle size distribution in the samples of aero sediments were defined. The samples were collected close to the power plant and open pit coal mine, in the winter and summer period during the year 2007. The sampling was performed by using precipitators placed in eight locations within the territory of the Lazarevac municipality. In order to characterize the sedimentary particles, several methods were applied: microscopy, SEM-EDX and X-ray powder diffraction. The concentration of aero sediments was also determined during the test period. Variety in the mineralogical composition and particle size depends on the position of the measuring sites, geology of the locations, the annual period of collecting as well as possible interactions. By applying the mentioned methods, the presence of inhalational and respiratory particles variously distributed in the winter and in the summer period was established. The most common minerals are quartz and feldspar. The presence of gypsum, clay minerals, calcite and dolomite as secondary minerals was determined, as well as the participation of organic and inorganic amorphic matter. The presence of quartz as a toxic mineral has a particular impact on human health. PMID:23054761

Cvetkovi?, Željko; Logar, Mihovil; Rosi?, Aleksandra

2013-05-01

 
 
 
 
21

Situation and development of uranium open-pit mining techniques in China  

International Nuclear Information System (INIS)

The situation of uranium open-pit mining techniques in China is described. The main experiences in production and management are introduced. Meanwhile the suggestions about the further development of uranium open-pit mining techniques are also proposed

1986-01-01

22

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.

23

Haulage Truck Operator. Open Pit Mining Job Training Series.  

Science.gov (United States)

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

British Columbia Dept. of Education, Victoria.

24

Shovel Operator. Open Pit Mining Job Training Series.  

Science.gov (United States)

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

Hartley, Larry

25

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

Science.gov (United States)

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

Savilow, Bill

26

Heavy Duty Tireman. Open Pit Mining Job Training Series.  

Science.gov (United States)

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

McColman, Don

27

Rotary Drill Operator. Open Pit Mining Job Training Series.  

Science.gov (United States)

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

Savilow, Bill

28

Grader Operator. Open Pit Mining Job Training Series.  

Science.gov (United States)

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

Savilow, Bill

29

Track Dozer Operator. Open Pit Mining Job Training Series.  

Science.gov (United States)

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

British Columbia Dept. of Education, Victoria.

30

EFFECTS OF THE DISPOSAL OF COAL WASTE AND ASHES IN OPEN PITS  

Science.gov (United States)

The objective of this study was to determine the extent of groundwater quality deterioration when coal mine solid waste (refuse) and power plant ashes were disposed of into open pits. In addition, disposal methods were developed and procedures for planning and designing disposal ...

31

Design of ventilation in open pit mines. Proyektirovaniye ventilyatsii v karyerakh  

Energy Technology Data Exchange (ETDEWEB)

This book systematizes materials and design of ventilation of open pit mines, cites theoretical formulas of the efficiency of natural ventilation and artificial ventilation of open pits of the coal and chemical industry, ores of ferrous and non-ferrous metallurgy, the building material industry and other branches which design and carry out development of mineral deposits. Recommendations are given on selection of principal equipment and means of ventilation, substantiation of the ventilation service and other practical questions, source data and reference materials for forecast and projection of the composition of the atmosphere, and examples of solution of specific problems.

Nikitin, V.S.; Bitkolov, N.Z.

1980-01-01

32

Mathematical Optimization Models and Methods for Open-Pit Mining  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Open-pit mining is an operation in which blocks from the ground are dug to extract the ore contained in them, and in this process a deeper and deeper pit is formed until the mining operation ends. Mining is often a highly complex industrial operation, with respect to both technological and planning aspects. The latter may involve decisions about which ore to mine and in which order. Furthermore, mining operations are typically capital intensive and long-term, and subject to uncertainties rega...

Amankwah, Henry

2011-01-01

33

Satellite Monitoring of Open Pit Mining Operations.  

Science.gov (United States)

Anticipating the availability of space-altitude imagery from the Earth Resource Technology Satellites (ERTS), the Bureau of Mines investigated the possibilities of using such imagery in this activities in solid waste disposal, reclamation of mine workings...

W. C. Henkes

1971-01-01

34

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

35

Planning of open pit mines on a risk basis  

Energy Technology Data Exchange (ETDEWEB)

This paper addresses the methodology of introducing risk into the development of mine plans for open pit mines. Recommendations are put forward for achieving a risk balance between mineral resource estimates and slope design. A design process identifying criteria for different stages of planning is presented. Business risk is separated from geological/geotechnical risk and procedures to address these within the development of mine plans are suggested. It is concluded that a formal design process improves communication between key decision makers and adds value to shareholders, investments. 14 refs., 11 figs.

Steffen, O.K.H. [Steffen, Robertson & Kirsten, Northlands (South Africa)

1997-03-01

36

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

37

Equipment size effects on open pit mining performance  

Energy Technology Data Exchange (ETDEWEB)

This paper discusses the exploitation of economies of scale in open pit mining through the use of increasingly larger equipment. It presents a method adopted to evaluate the impact of increased scale on operational performance factors. The work identifies equipment size sensitive variables (ESSVs) in the mine design process that affect the performance of the production process. Data from a set of case studies show that the ESSV influence extends beyond mine production to encompass milling performance, environmental footprint and community impacts. Some ESSVs (such as reliability, tyre costs and productivity) are shown to be related to the current state of equipment technology and their effects are therefore comparable for different mines. Other ESSVs relate to the mine and deposit characteristics; their effects therefore vary from mine to mine. A detailed analytical approach, developed to model the impact of ESSVs, suggests that for truck/shovel operations, the industry may be approaching a situation of diseconomies of scale.

A. Bozorgebrahimi; R.A. Hall; M.A. Morin [University of British Columbia, Vancouver, BC (Canada). Mining Engineering Department

2005-03-01

38

Cut winnings methods of an open-pit mine development  

Directory of Open Access Journals (Sweden)

Full Text Available 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.

Ivana Cehlárová

2007-10-01

39

Natural radioactivity in lignite samples from open pit mines "Kolubara", Serbia - risk assessment.  

Science.gov (United States)

Coal as fossil fuel mainly contains naturally occurring radionuclides from the uranium and thorium series and (40)K. Use of coal, primarily in industry, as a result has dispersion of radioactive material from coal in and through air and water. The aim of this study was to determine the activity concentrations of natural radionuclides in coal samples from open pit mines "Kolubara" and to evaluate its effect on population health. The results showed that all measured and calculated values were below the limits recommended in international legislation. PMID:24360863

Duraševi?, M; Kandi?, A; Stefanovi?, P; Vukanac, I; Sešlak, B; Miloševi?, Z; Markovi?, T

2014-05-01

40

Dewatering of the Jenkins open pit uranium mine  

International Nuclear Information System (INIS)

Mining of low grade uranium sandstones in the Jenkins open pit mine in the Shirley Basin, Wyoming was troubled by slope failures and wet conditions in the pit. Since the mine was expanding toward a river, the possibility of drainage from this river into the mine raised serious concern during the mine planning. A baseline hydrogeologic study was performed and dewatering measures were designed with the help of a numerical mathematical model. A combination of dewatering wells installed from the surface around the perimeter of the pit and horizontal drains in areas of high slope failure potential substantially improved the mining conditions and slope stability. This procedure consequently led to the successful ore recovery from the highly saturated sandstone strata. The development of drawdown during the dewatering of two separated aquifers in the overburden was close to that predicted by the model

1984-12-01

 
 
 
 
41

Some considerations concerning the classification and choosing of mining methods to be used in open pits  

Energy Technology Data Exchange (ETDEWEB)

The article presents the mining, handling and stockpiling systems for open pits, a detailed classification of mining methods used in open pits sites as well as the choosing of the most suitable mining method, taking into consideration both the geological mining factors and the technico-economic ones. 7 refs., 4 tabs.

Fodor, D.; Georgescu, M.

1991-01-01

42

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

43

Benchmarking the energy consumption of Canadian open-pit mines  

Energy Technology Data Exchange (ETDEWEB)

An energy efficiency analysis of the Mining Association of Canada (MAC) open-pit mines was presented. Nine mining and milling operations were involved in the project, including gold, oil sands and iron ore establishments. The project involved a detailed inter-facility comparison of the energy consumed in drilling and transport as well as concentration processes such as crushing and tailings disposal. Approximately 25 categories of energy cost and usage information were evaluated, split into costs per unit of energy, and energy consumed per kilotonne for open-pit mining processes. Aggregates of all production stages beyond grinding to loadout, process water and support services were provided. Energy consumption was based on kilowatt hour equivalents. Comparative unit costs per energy type were presented, for both total and mining operations. General estimates of potential energy savings from attaining energy efficiency optimization were presented. It was noted that there were significant opportunities for improvement in the lowest-cost most efficient facilities, and the fact that different firms were more efficient in different stages of production gave evidence of the potential for further savings. Potential energy savings with the most efficient operation for each production stage for mining operations were presented. The sum of the total savings was in the region of $74 million, which represented one third of total energy costs as applied to the 9 study participants. However, it was suggested that the potential savings identified may not be realizable for a range of practical reasons, such as economies of scale or the nature of the ore body. tabs., figs.

NONE

2005-07-01

44

Special characteristics of an evaluation of the efficacy of investing in open pit mining  

Energy Technology Data Exchange (ETDEWEB)

A method of distributing investments to obtain a productive effective increase and to maintain it is examined. The methodology is to be used to determine the absolute efficacy of investing in open-pit mining. The dynamics of the absolute efficacy of investing in a Kuzbas open-pit mine for a 20-year period are presented.

Kalinina, A.F.

1980-01-01

45

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

46

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

47

Cost analysis of open-pit mining by heap leaching  

International Nuclear Information System (INIS)

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

1983-01-01

48

Problem of the necessity of cutting narrow beds in the open-pit mines of Kuzbas  

Energy Technology Data Exchange (ETDEWEB)

The present state of development of narrow beds is presented, and the basic directions to be taken to solve the problem of the necessity of cutting them in the open-pit mines of Kuzbas are determined.

Kukhar, V.S.

1980-01-01

49

Environmental management of large scale open pit mining operations with special reference to Northern Coalfields Limited  

Energy Technology Data Exchange (ETDEWEB)

India`s coal production from open pit mines rose to 202.2 mt in 1995-96 and is forecast to rise further. Northern Coalfields Ltd., has developed the production of coal from the Singrauli coalfield but had to implement strict environmental control to minimise damage to an area where the population is largely tribal and economically and socially weak. The paper describes the successful environmental and social mitigation measures implemented in and around the area. Those include reclamation of spoil dumps for afforestation, measures to minimise emissions and noise emitted from heavy vehicles and to control coal dusts, treatment of water pollution, and rehabilitation of families within core activity areas. 17 refs., 2 figs., 3 tabs., 9 photos.

Sen, S.K. [Northern Coalfields Limited (India)

1997-12-31

50

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

2011-01-01

51

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

52

4th large open pit mining conference, managing risk. Proceedings  

Energy Technology Data Exchange (ETDEWEB)

A total of 45 papers were presented at the conference, with the theme of management of risk associated with environmental issues surrounding any mine or mine development proposal. The subject is covered from the point of view of a company`s legal obligations, discussing systems available for helping with the task of environmental management. Other papers cover the financial exposures involved, and the practical aspects of the topic. 4 papers have been abstracted separately for the IEA Coal Research CD-ROM.

NONE

1994-12-31

53

The slope stability under underground mining of Anjialing open-pit mine on Pingshuo  

Energy Technology Data Exchange (ETDEWEB)

Using the Anjialing open-pit mine in Pingshuo for research, limit equilibrium theory and geo-slope software for slope stability analysis were used to consider the influence of the external environment such as ground water and underground mining on slope stability. The study included studying water pressure and a slope damage model under underground mining, carrying out slope stability calculations and providing prevention and control measures. Results show that the water pressure and underground mining are the important factors affecting slope stability. Some upper slopes are seriously affected and sliding is possible. 9 refs., 5 figs., 2 tabs.

Chen Shi-kuo; Yang Tian-hong; Zhang Hua-xing [Northeastern University, Shenyang (China). Center for Rock Instability and Seismic Research

2008-02-15

54

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?”.

Papi? Petar

2013-09-01

55

Emissions reduction by means of continuous open pit mining technology; Emissionsreduzierung durch Einsatz kontinuierlicher Tagebautechnik  

Energy Technology Data Exchange (ETDEWEB)

A change of system in open pit mining worldwide to continuous open pit mining technology not only leads to a reduction in running operating costs, but in particular to potential savings in CO{sub 2} emissions as well. These savings are being studied in a current research project. In the growing market for raw materials, the combination of newly designed, fully mobile crushing plants with innovative belt conveyor system technology in particular can achieve reductions in CO{sub 2} emissions of the order of up to 150,000 tons per year and per installed system for raw materials extraction, compared to conventional truck transport. (orig.)

Raaz, V. [ThyssenKrupp Foerdertechnik GmbH, Essen (Germany). Abt. Business Development; Mentges, U. [ThyssenKrupp Foerdertechnik GmbH, Essen (Germany). Vertrieb/Bergbauplanung

2007-07-01

56

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 SciELO Chile | Language: Spanish 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 (dis [...] tribución 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. 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 distr [...] ibution, 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.

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

57

GPSS system applied to optimization of technological process of open-pit mine  

International Nuclear Information System (INIS)

The queuing sub-system and the stored sub-system are abstracted as a composed dynamic system from the technological process of open-pit mining. Using the GPSS system the simulation models were established, and by changing the parameters of the models the optimization of the technological process was carried out

1993-02-01

58

Characterization of airborne particles in an open pit mining region  

International Nuclear Information System (INIS)

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 (PM10) 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. - Highlights: ? Airborne particles from an opencast mining region were fully characterized. ? SEM-EDS and XPS techniques were applied to characterize airborne particles ? Particle size distributions of TSP and PM10 are lognormal ? Particles are composed of limestone, calcite, quartz, and potassium feldspar ? Heavy metals content in the particles does not represent any risk to human health

2012-04-15

59

Air quality status of an open pit mining area in India.  

Science.gov (United States)

This investigation presents the assessment of ambient air quality carried out at an open pit coal mining area in Orissa state of India. The 24-h average concentrations of suspended particulate matter (SPM), respirable particulate matter (RPM, particles of less than 10 microm aerodynamic diameter), sulphur dioxide (SO2) and oxides of nitrogen (NO(x)) were determined at regular interval throughout one year at 13 monitoring stations in residential area and four stations in mining/industrial area. During the study period, the 24-h and annual average SPM and RPM concentrations exceeded the respective standards set in the Indian ambient air quality standard (NAAQS) protocol in most of the residential and industrial areas. However, the 24-h and annual average concentrations of SO2 and NO(x) were well within the prescribed limit of the NAAQS in both residential and industrial areas. A management strategy is formulated for effective control of particulate matter at source and other mitigative measures are recommended including implementation of green belts around the sensitive areas. PMID:15952529

Chaulya, S K

2005-06-01

60

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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

Maria Matos; João Santos Baptista; Miguel Tato Diogo

2012-01-01

 
 
 
 
61

Characterization of airborne particles in an open pit mining region  

Energy Technology Data Exchange (ETDEWEB)

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 {mu}m and {sigma}(ln d) = 0.61 {+-} 0.03. Similarly, all particles with an equivalent aerodynamic diameter less than 10 {mu}m (PM{sub 10}) exhibited a log-normal type distribution with a mean of d = 3.6 {+-} 0.38 {mu}m and {sigma}(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. - Highlights: Black-Right-Pointing-Pointer Airborne particles from an opencast mining region were fully characterized. Black-Right-Pointing-Pointer SEM-EDS and XPS techniques were applied to characterize airborne particles Black-Right-Pointing-Pointer Particle size distributions of TSP and PM{sub 10} are lognormal Black-Right-Pointing-Pointer Particles are composed of limestone, calcite, quartz, and potassium feldspar Black-Right-Pointing-Pointer Heavy metals content in the particles does not represent any risk to human health.

Huertas, Jose I., E-mail: jhuertas@itesm.mx [Tecnologico de Monterrey, Eduardo Monroy Cardenas No 2000, Toluca, Mexico (Mexico); Huertas, Maria E. [Texas A and M University, College Station, Texas 77843 (United States); Solis, Dora A. [Universidad Autonoma del Estado de Mexico, Carrera Toluca - Atlacomulco km 14.5. Tlachaloya, Toluca, Mexico (Mexico)

2012-04-15

62

Characterization of airborne particles in an open pit mining region.  

Science.gov (United States)

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. PMID:22405562

Huertas, José I; Huertas, María E; Solís, Dora A

2012-04-15

63

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

Energy Technology Data Exchange (ETDEWEB)

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

Trajkovic, D.

1982-01-01

64

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

1983-09-01

65

Slope Design and Implementation in Open Pit Mines: Geological and Geomechanical Approach  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Slopes in open pit mines must be considered as geotechnical structures. Therefore their design and implementation must be conducted with all consideration including technical, economical, environmental and safety issues. But these structures are above all natural geological and geomechanical features and the geological structures as well as the petrographical nature of the rock material control the deformation and failure mechanisms. It is therefore important to implement a well-defined metho...

Fleurisson, Jean-alain

2012-01-01

66

Radiation safety aspects of occupational areas at a Brazilian open-pit mine  

International Nuclear Information System (INIS)

This paper discusses the radiation safety aspects of open-pit mining in Brazil and presents results of exposure rate measurements at points located at different work-front sites, primary crushing, static leaching sites and ore storage patio. Results of surface contamination and air monitoring in the hauling trucks and area control cabs are presented. Routine difficulties in trying to comply with the radiation safety procedures required is discussed and suggestions presented

1984-10-14

67

Robust models for simultaneous open pit and underground mines  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Mining planning is a central problem in the mining business with the goal of setting high revenued exploitation agendas. However, current models lack robustness: they do not consider uncertainty of the future, so the plans are, indeed, recalculated every year according to the new information. This work presents some approaches to solve the above-mentioned problem: at first the current models are exposed, stochastic programming is used then to set up new models considering uncertainity. As a s...

Morales, Nelson

2003-01-01

68

Optimal cut-off grade determination based on variable capacities in open-pit mining  

Scientific Electronic Library Online (English)

Full Text Available SciELO South Africa | Language: English Abstract in english SYNOPSIS Optimal cut-off grade is one of the most critical parameters in open-pit mine design because it defines the ore and waste and thus determines the maximum net present value possible from the mining operation. Although the algorithm presented by Lane (Choosing the optimum cut-off grade. Color [...] ado School of Mines Quarterly, vol. 59, no. 4, 1964. pp. 811-829) is the most common one in the literature, it does assume constant capacities of the mine, processing, and refinery. In this paper, Lane's original algorithm has been modified to consider variable processing capacities in order to determine the optimal cut-off grade in open-pit mines. The new algorithm proposed here is compared to both Lane's original algorithm and to a previous modification that incorporated rehabilitation costs into the cut-off grade estimation. The algorithm proposed here that permits variable processing capacities is shown to be superior for the determination of optimal cut-off grade to both these previous versions. In addition, a computer-based program was developed in Microsoft Office Excel© to calculate the optimal cut-off grade as proposed here.

J., Abdollahisharif; E., Bakhtavar; M., Anemangely.

69

Combining Multiple Surveying Techniques to Accelerate Surveys of Open Pit Mines  

Science.gov (United States)

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

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

2014-05-01

70

Estimation of resuspension of radioactive aerosols in equipment cab of open-pit uranium mining  

International Nuclear Information System (INIS)

In open-pit mining of high grade ores, operators of mining equipment in a pressurized cab are protected from inhaling radioactive aerosols by the use of filtered air through a pre-impactor and a HEPA (high efficiency particulate air) filter. At present, a limited amount of scientific information is available on the worker exposure to airborne alpha emitters in the mining of high-grade ores. Four series of field samplings were conducted during the fall of 1980 and the summer of 1981 at a mining site in northern Saskatchewan to investigate the extent of protection an equipment operator has against cab internal exposure to airborne alpha emitters with short and long half-life radionuclides. The variation in the breathing zone concentration of aerosols as a result of resuspension is discussed, however no attempt was made to isolate and investigate the factors and the associated parameters of the aerosol resuspension phenomenon

1981-10-09

71

Landslide phenomena in Dashkesan open pit mines and a rational blasting technology  

Energy Technology Data Exchange (ETDEWEB)

The reasons for the occurrence of landslides are examined, based on the stability of the surrounding rocks in the presence of a round, cylindrical slip surface. It is recommended that surveying be done to establish the boundaries of dangerous zones and to determine the locations of fracture systems. Finishing off the body of a landslide by exploding a lateral fixing is described, as is finishing off in stages, using lateral progress cycles from the top downwards. Stage blasting of a group of benches with decelaration from the top downwards is also described. A description of preventive measures taken to prevent landslide phenomena in open pit mines is given.

Shrubko, S.A.; Kasumov, F.K.

1980-01-01

72

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

1991-09-17

73

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

Energy Technology Data Exchange (ETDEWEB)

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

Dag, A.; Anil, M.

1996-12-31

74

Mining and technological characteristics of future open-pit mine at Brod-Gneotino  

International Nuclear Information System (INIS)

Development program of Electric Power Company of Macedonia includes to open several pits of coal with aim to prolongate the working period of TPP Bitola, of which one is the bed Brod-Gneotino. This coal bed is characterized with some characteristic mining and technological parameters described in thi paper. (Author)

2005-06-01

75

Close-out of open pit and waste rock piles of Daxin uranium mine of China - 59073  

International Nuclear Information System (INIS)

Document available in abstract form only. Full text of publication follows: Daxin Uranium Mine is an small open pit mine. Its contaminated facilities include open pit 87620 m2, East waste rock pile 71710 m2, west waste rock pile 57828 m2, ore transfer station and industrial fields 9370 m2, building and structure 26600 m2, equipment 246 pieces, plastic conduit 3000 m. steel conduit 2500 m2 and road for transporting ores 1020 m. The integrated decommissioning programmes are presented: uranium extraction, slope stabilization, clear-up, backfill, reshape, covering, re-vegetation, dismantlement/ demolishment, decontamination, re-smelting, waste water treatment. (authors)

2011-09-25

76

Study on the Law of the Movement and Damage to Slope with the Combination of Underground Mining and Open-Pit Mining  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Under circumstances in which both underground mining and open-pit mining are employed, the mining effects of two approaches will be superposed and the mining slope will receive several induced stress fields, which makes the sliding mechanism and deformation law of slope rock mass more complicated. This paper, targeting at the east slope of Antaibao Mine with the joint employment of underground mining and open-pit mining, aims to study the moving law of the slope rock mass and the damage mecha...

Gaofeng Ren; Xingkui Fang

2010-01-01

77

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

Energy Technology Data Exchange (ETDEWEB)

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

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

2004-09-01

78

Public exposure to hazards associated with natural radioactivity in open-pit mining in Ghana  

International Nuclear Information System (INIS)

The results of studies carried out on public exposure contribution from naturally occurring radioactive materials (NORMS) in two open-pit mines in the Western and Ashanti regions of Ghana are reported. The studies were carried out under International Atomic Energy Agency-supported Technical Co-operation Project GHA/9/005. Measurements were made on samples of water, soil, ore, mine tailings and air using gamma spectrometry. Solid-state nuclear track detectors were used for radon concentration measurements. Survey was also carried out to determine the ambient gamma dose rate in the vicinity of the mines and surrounding areas. The effective doses due to external gamma irradiation, ingestion of water and inhalation of radon and ore dusts were calculated for the two mines. The average annual effective dose was found to be 0.30 ± 0.06 mSv. The result was found to be within the levels published by other countries. The study provides a useful information and data for establishing a comprehensive framework to investigate other mines and develop guidelines for monitoring and control of NORMS in the mining industry and the environment as a whole in Ghana. (authors)

2010-01-01

79

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

80

A study of radiation parameters in an open-pit mine  

International Nuclear Information System (INIS)

Radiation parameters associated with the open pit mining of a small (10,000 tonnes) but high grade (2%) uranium deposit at Nabarlek, N.T., have been investigated in detail. External radiation levels, radon emanation rates and radon daughter levels were measured systematically during the development of the mine, and are correlated with ore grade, properties of the host rock and atmospheric conditions. Significant radon daughter concentrations were observed only under stable atmospheric conditions, usually during the night and were invariably associated with thermal inversions. The mean cumulative exposure to radon daughters was estimated from the measured levels to be 0.065 Working Level Months for employees working in the pit for the entire four and a half months of mining. The mean cumulative external gamma ray exposure for the same employee group was measured using thermoluminescent dosimeters to be 2.3 mSv (230 mrem). For most other employees, however, exposures were much lower. Data on long lived radionuclides in dust and on particle size distribution are also presented. (author)

1982-01-01

 
 
 
 
81

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

Science.gov (United States)

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

Sari, Mehmet; Ghasemi, Ebrahim; Ataei, Mohammad

2014-03-01

82

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

2011-09-01

83

A study of radiation parameters in an open-pit mine.  

Science.gov (United States)

Radiation parameters associated with the open pit mining of a small (10,000 tonnes), but high grade (2%) uranium deposit at Nabarlek, N.T., have been investigated in detail. External radiation levels, radon emanation rates and radon daughter levels were measured systematically during the development of the mine, and are correlated with ore grade, properties of the host rock and atmospheric conditions. Significant radon daughter concentrations were observed only under stable atmospheric conditions, usually during the might and were invariably associated with thermal inversions. The mean cumulative exposure to radon daughters was estimated from the measured levels to be 0.065 Working Level Months for employees working in the pit for the entire four and a half months of mining. The mean cumulative external gamma ray exposure for the same employee group was measured using thermoluminescent dosimeters to be 2.3 mSv (230 mrem). For most other employees, however, exposures were much lower. Data on long lived radionuclides in dust and on particle size distribution are also presented. PMID:6293999

Leach, V A; Lokan, K H; Martin, L J

1982-09-01

84

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

85

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

Energy Technology Data Exchange (ETDEWEB)

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

Bendell, L.I., E-mail: bendell@sfu.ca

2011-02-15

86

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

International Nuclear Information System (INIS)

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

2011-02-15

87

Typical whole body vibration exposure magnitudes encountered in the open pit mining industry.  

Science.gov (United States)

According to recent research, a causal link has been established between occupational exposure to whole body vibration and an increased occurrence of low back pain. To aid in the further development of an in-house health and safety program for a large open pit mining facility interested in reducing back pain among its operators, whole body vibration magnitudes were characterized for a range of jobs. Specifically, thirty-five individual jobs from five different areas across the facility were evaluated for tri-axial acceleration levels during normal operating conditions. Tri-axial acceleration magnitudes were categorized into thirteen job groups. Job groups were ranked according to exposure and compared to the ISO 2631-1 standard for health risk assessment. Three of the thirteen job groups produced tri-axial acceleration magnitudes below the ISO 2631-1 low/moderate health caution limit for a twelve hour exposure. Six of the thirteen job groups produced exposures within the moderate health risk range. Four job groups were found to subject operators to WBV acceleration magnitudes above the moderate/high health caution limit. PMID:20037244

Howard, Bryan; Sesek, Richard; Bloswick, Don

2009-01-01

88

Study on the Law of the Movement and Damage to Slope with the Combination of Underground Mining and Open-Pit Mining  

Directory of Open Access Journals (Sweden)

Full Text Available Under circumstances in which both underground mining and open-pit mining are employed, the mining effects of two approaches will be superposed and the mining slope will receive several induced stress fields, which makes the sliding mechanism and deformation law of slope rock mass more complicated. This paper, targeting at the east slope of Antaibao Mine with the joint employment of underground mining and open-pit mining, aims to study the moving law of the slope rock mass and the damage mechanism to the overburden of the goaf by numerical simulation. It is supposed that models of possible damage to the slope could be explored for guidance to safety-production of the mine.

Xingkui Fang

2010-04-01

89

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

Science.gov (United States)

Archived samples of blue grouse (Dendragapus obscurus) gizzard contents, inclusive of grit, collected yearly between 1959 and 1970 were analyzed for cadmium, lead, zinc, and copper content. Approximately halfway through the 12-year sampling period, an open-pit copper mine began activities, then ceased operations 2 years later. Thus the archived samples provided a unique opportunity to determine if avian gizzard contents, inclusive of grit, could reveal patterns in the anthropogenic deposition of trace metals associated with mining activities. Gizzard concentrations of cadmium and copper strongly coincided with the onset of opening and the closing of the pit mining activity. Gizzard zinc and lead demonstrated significant among year variation; however, maximum concentrations did not correlate to mining activity. The archived gizzard contents did provide a useful tool for documenting trends in metal depositional patterns related to an anthropogenic activity. Further, blue grouse ingesting grit particles during the time of active mining activity would have been exposed to toxicologically significant levels of cadmium. Gizzard lead concentrations were also of toxicological significance but not related to mining activity. This type of "pulse" toxic metal exposure as a consequence of open-pit mining activity would not necessarily have been revealed through a "snap-shot" of soil, plant or avian tissue trace metal analysis post-mining activity. PMID:21195454

Bendell, L I

2011-02-15

90

Preliminary design guidelines for an open pit highwall at Quintette Coal Ltd. , northeastern British Columbia  

Energy Technology Data Exchange (ETDEWEB)

The Quintette Coal Mine is located in northeastern British Columbia. The purpose of this study is to provide preliminary design guidelines for a proposed highwall in the northwestern section of the Mesa pit. The study is based on field data and technical information provided by Quintette Coal Ltd. (Denison Mines Ltd). The design parameters include bench heights, berm widths, bench face angles, and overall slope angles. 12 refs., 20 figs., 3 append.

Gant, M.D. (University of British Columbia, Vancouver, BC (Canada). Geological Sciences)

1990-04-01

91

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

Scientific Electronic Library Online (English)

Full Text Available SciELO South Africa | Language: English 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 declines 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.

M.W.A, Asad; E, Topal.

92

Open pit blasting in uranium ore mining of SDAG Wismut. Pt. 3  

International Nuclear Information System (INIS)

The article reports blasting work in the abandoned open pits at Culmitzsch and Lichtenberg, dealing primarily with the techniques of so-called detonation-wave-shielded blasting, blasting at elevated rock temperatures, and blasting at site with fractured rock. (orig./HP)

1994-10-01

93

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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

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

1987-01-01

94

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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

Hugues, Olivier; Gbodossou, Andre?; Cieutat, Jean-marc

2012-01-01

95

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 SciELO South Africa | Language: English 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 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..

96

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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

1992-01-01

97

Engineering application of thrust block analysis in slope stability problems in open pit mines  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The classical limit equilibrium methods are suspected to be ineffective in predicting the potential for highwall failure in many instances in coal mines around the world. Slope engineers have for many years recognized a block thrust failure mechanism for slope failures, but little work had been done before 2000 to explain the actual mechanisms which must be responsible for the failure. The main reason for this is that limit equilibrium methods implicitly assume rigid blocks, and the result...

Karparov, K. N.; Handley, M. F.

2009-01-01

98

Auger mining experiment in North Hessian brown coal  

Energy Technology Data Exchange (ETDEWEB)

At the edges of open pit coal mines, there often exist coal seam extensions which cannot be recovered economically either by open pit or underground methods. At a small open pit coal mine in North Herse an experiment was made with an auger miner (Type UZA 201) to see if some of this coal could be recovered economically. Forty-three boreholes one meter in diameter were made to depths of 40 to 55 meters in a brown coal seam 2 to 3 meters thick. The results were encouraging but equipment modifications would be necessary in future work for safety and efficiency. Also, since the stability of the wall would be reduced the cycle of slope would have to be much flatter than is usual practice. (LTN)

Duddek, H. (Elektrische Licht- und Kraftanlagen AG, Homberg, Ger.); Schoenhut, H.

1976-09-01

99

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

International Nuclear Information System (INIS)

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

1984-04-09

100

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

Science.gov (United States)

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. PMID:22622763

Edberg, Frida; Andersson, Anders F; Holmström, Sara J M

2012-11-01

 
 
 
 
101

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

International Nuclear Information System (INIS)

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

2002-01-01

102

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

Science.gov (United States)

The impact of mining industry and metal production on the environment is presented all over the world. In our research we set focus on the impact of already non-operating ferrous "Kremikovtsi"open pit mine and related waste dumps and tailings which we consider to be the major factor responsible for pollution of one densely populated region in Bulgaria. The approach adopted is based on correct estimation of the distribution of the iron oxides inside open pit mines and the neighboring regions those considered in this case to be the key issue for the ecological state assessment of soils, vegetation and water. For this study the foremost source of data are those of airborne origin and those combined with ground-based in-situ and laboratory acquired data were used for verification of the environmental variables and thus in process of assessment of the present environmental status influenced by previous mining activities. The percentage of iron content was selected as main indicator for presence of metal pollution since it could be reliably identified by multispectral data used in this study and also because the iron compounds are widely spread in the most of the minerals, rocks and soils. In our research the number of samples from every source (air, field, lab) was taken in the way to be statistically sound and confident. In order to establish relationship between the degree of pollution of the soil and mulspectral data 40 soil samples were collected during a field campaign in the study area together with GPS measurements for two types of laboratory measurements: the first one, chemical and mineralogical analysis and the second one, non-destructive spectroscopy. In this work for environmental variables verification over large areas mulspectral satellite data from Landsat instruments TM/ETM+ and from ALI/OLI (Operational Land Imager) were used. Ground-based (laboratory and in-situ) spectrometric measurements were performed using the designed and constructed in Remote Sensing Systems Department at Space Research and Technology Institute thematically oriented spectrometric system TOMS working in the 0.4-0.9 ?m range of the electromagnetic spectrum (EMS). For proper comparison between the data obtained from the different sources mentioned spectral transformations such as normalized difference and rationing data for two wavelengths were applied in order to avoid misinterpretation. Statistically significant dependence between the various spectral transformations and the quantitative content of the iron in the different type of compounds was established. The achieved results provided evidence that methodology used could be extended to other regions of the country polluted by the mining activities and should be also tested in the region of the copper and zinc extraction. In the next step of our research we intend to use the results obtained by the multitemporal analysis of the satellite and ground-based multispectral data for the same and the similar regions of interest.

Borisova, Denitsa; Nikolov, Hristo; Petkov, Doyno

2013-10-01

103

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

104

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 app...

Adel Badri; Sylvie Nadeau; André Gbodossou

2011-01-01

105

Coal and coal mine drainage  

Energy Technology Data Exchange (ETDEWEB)

The review relates to surface mining, hydrology, sedimentology, land reclamation and mine water discharges. Environmental regulations existing are described, and the regional and chemical aspects of coal mine drainage characterization are covered. Coal mine drainage process and mitigation studies are discussed as well as coal cleaning, coal transportation and storage and a coal mine drainage model is proposed. 76 refs.

Olem, H.

1987-06-01

106

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

International Nuclear Information System (INIS)

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

1978-01-01

107

Mining principles in the situation of Dolni Rozinka Uranium Mines deposit with respect to protection of open pits and mines  

International Nuclear Information System (INIS)

Three surface and a network of underground monitoring points were established for assessing the impact of extracting oblique and steep ore zones and veins in the uranium ore deposit at Dolni Rozinka on the surrounding massif and on the earth surface. On the basis of these in-situ measurements and the results of modelling using equivalent materials and mathematical modelling and the evaluation of practical experience in the excavation of mines in this deposit new techniques were designed for protecting installations and buildings from the impacts of mining activities. The distance and size of limit angles of the mining effect were determined which allowed to considerably limit the range of existing safety pillars and thereby to reduce the volume of utility minerals whose excavation had previously been restricted. (B.S.)

1984-10-15

108

A mineral quantification method for wall rocks at open pit mines, and application to the Martha Au-Ag mine, Waihi, New Zealand  

International Nuclear Information System (INIS)

Pit lakes that result from open pit mining are potential water resources or potential environmental problems, depending on lake water quality. Wall rock mineralogy can affect lake chemistry if surface water inputs and/or groundwater inputs and/or lake water in contact with submerged wall rocks react with the wall rock minerals. This study presents a mineral quantification method to measure the distribution and concentration of wall rock minerals in open pit mines, and applies the method to the Martha epithermal Au-Ag mine, Waihi, New Zealand. Heterogeneous ore deposits, like Martha, require a large number of wall rock samples to accurately define mineral distributions. X-ray diffraction analyses of 125 wall rock samples identified the most abundant minerals in the wall rocks as quartz, adularia, albite, illite, chlorite, kaolinite, pyrite and calcite. Distribution maps of these minerals defined 8 relatively homogenous areas of wall rock referred to as 'mineral associations': weakly-altered, propylitic, fresh-argillic, weathered-argillic, oxidized, potassic, quartz veins, and post-mineralization deposits. X-ray fluorescence, Leco furnace, and neutron activation analyses of 46 representative samples produced the geochemical dataset used to assign quantities of elements to observed minerals, and to calculate average mineral concentrations in each association. Thin-section petrography and calcite concentrations from Sobek acid-digestions confirm the calculated mineralogy, providing validation for the method. Calcite and pyrite concentrations allowed advanced acid-base accounting for each mineral association, identifying 3 potential acid-producing associations and one potential acid-neutralizing association. The results target areas, where detailed hydrologic and kinetic tests would be valuable in the next stage of pit lake evaluation. Detailed understanding of wall rock mineralogy will help strengthen predictions of pit lake water quality

2005-01-01

109

A mineral quantification method for wall rocks at open pit mines, and application to the Martha Au-Ag mine, Waihi, New Zealand  

Energy Technology Data Exchange (ETDEWEB)

Pit lakes that result from open pit mining are potential water resources or potential environmental problems, depending on lake water quality. Wall rock mineralogy can affect lake chemistry if surface water inputs and/or groundwater inputs and/or lake water in contact with submerged wall rocks react with the wall rock minerals. This study presents a mineral quantification method to measure the distribution and concentration of wall rock minerals in open pit mines, and applies the method to the Martha epithermal Au-Ag mine, Waihi, New Zealand. Heterogeneous ore deposits, like Martha, require a large number of wall rock samples to accurately define mineral distributions. X-ray diffraction analyses of 125 wall rock samples identified the most abundant minerals in the wall rocks as quartz, adularia, albite, illite, chlorite, kaolinite, pyrite and calcite. Distribution maps of these minerals defined 8 relatively homogenous areas of wall rock referred to as 'mineral associations': weakly-altered, propylitic, fresh-argillic, weathered-argillic, oxidized, potassic, quartz veins, and post-mineralization deposits. X-ray fluorescence, Leco furnace, and neutron activation analyses of 46 representative samples produced the geochemical dataset used to assign quantities of elements to observed minerals, and to calculate average mineral concentrations in each association. Thin-section petrography and calcite concentrations from Sobek acid-digestions confirm the calculated mineralogy, providing validation for the method. Calcite and pyrite concentrations allowed advanced acid-base accounting for each mineral association, identifying 3 potential acid-producing associations and one potential acid-neutralizing association. The results target areas, where detailed hydrologic and kinetic tests would be valuable in the next stage of pit lake evaluation. Detailed understanding of wall rock mineralogy will help strengthen predictions of pit lake water quality.

Castendyk, Devin N. [Environmental Science, SGES, University of Auckland, Tamaki Campus, Private Bag 92019, Auckland (New Zealand)]. E-mail: d.castendyk@auckland.ac.nz; Mauk, Jeffrey L. [Geology Department, University of Auckland, Private Bag 92019, Auckland (New Zealand); Webster, Jenny G. [Environmental Science, SGES, University of Auckland, Tamaki Campus, Private Bag 92019, Auckland (New Zealand)

2005-01-01

110

Open pit mine planning and design. Volume 2 - CSMine software package  

Energy Technology Data Exchange (ETDEWEB)

CSMine, a user-friendly mine planning and design software developed for use in illustrating the principles involved, forms the basis for volume 2 of the textbook and reference book. It includes a program disk, a description of an actual property (a copper prospect in the Globe-Miama District of Arizona) with the corresponding drillhole and topography data set, a tutorial and users guide for CSMine, and a tutorial, users guide and reference manual for the related vario C geostatics package. (The two-volume set has an ISBN: 90-5410-183-0).

Hustrulid, W.; Kuchta, M. [Colorado School of Mines, Golden, CO (United States)

1995-12-31

111

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

2013-07-01

112

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. 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...

Nay Zarlin; Takashi Sasaoka; Hideki Shimada; Kikuo Matsui

2012-01-01

113

Geometric analysis of the open pit ''Bogudovo-Selo-Sjeberni'' in Uglevik  

Energy Technology Data Exchange (ETDEWEB)

An analysis is made of the geometric parameters of open pit working an inclined seam in order to select the optimal mode for development of mining operations. The volume of stripping and extraction of coal according to /phi/..-->..O (angle of inclination of the working edge) and /phi/ /SUB max/ is defined for different development variants. Analysis is necessary for planning the quarry.

Becirovic, H.; Cipra, V.

1982-01-01

114

Safety problems of methane gas in underground coal mines in Vietnam  

Energy Technology Data Exchange (ETDEWEB)

An overview is presented of Vietnam's coal reserves and coal mining activities. In 1998, 11 million tons of coal was produced of which 3 million tons was exported. 65% of coal is produced by open pit mining, the rest by underground mining. Anthracite, lignite, peat and fat coal are mined. Underground mines are classified into 4 levels according to methane hazard. There have been 22 fire cases and firedamp explosions in underground mining. Methods of monitoring methane and preventing threats of methane explosion are outlined. Vietnam hopes for international cooperation on labour safety and explosion prevention. 4 tabs.

Manh Dac, P. [Institute of Mining Science and Technology, Hanoi (Vietnam)

2000-03-01

115

[An occupational physiology study at the Asarel Mining and Milling Works. The evaluation of the work load in the basic jobs in an open-pit mine].  

Science.gov (United States)

This occupational physiology study was undertaken within a wider applied-research framework designed to evaluate the occupational environment and its impact on workers at "Asarel" Mining and Milling Works. Analysis of activities showed physical effort (dynamic and static) to be the major problem at the open pit, though varying in extent between jobs (most prominent for blasters and bulldozerists). Nervous/emotional strain, while not leading, was sustained mostly by diggers and blasters, followed by drivers. Organization of work (shift regimen, no regulated breaks, stepwise schedule of days off work) was hardly appropriate and did not allow for recovery. Interviewed workers qualified working conditions as extremely unfavorable; they disapproved with the physical factors of the occupational environment, the workplace, the state of machines and devices, and remuneration for work performed. Exertion from work, assessed by pulse rate and energy expended, was moderate for most activities of diggers, drivers, and drillers. The burden of physical effort was great for blasters at the open pit and for diggers and drillers performing extra repair operations (pulse rate, 100-110 strokes/min; energy expended, 5.2-5.5 Kcal/min). Hardest and least attractive was the work of blasters at stores for explosive materials (pulse rate, 120-141 strokes/min; energy expended, 5.5-6.5 Kcal/min). These adverse factors of labor activities might produce a negative impact on worker health and performance, leading to occupational impairment of their musculoskeletal system, to labor-related disorders of their cardiovascular and nervous systems, etc. Preventive measures are thus necessary to limit physical exertion, optimize the work-and-rest regimen; also, there is a need for conducting pertinent preventive medical examinations, providing social measures (conditions for transportation, rest, nutrition, sports), etc. PMID:8524750

Mincheva, L; Khadzhiolova, I; Deianov, Kh

1995-01-01

116

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

Science.gov (United States)

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. PMID:23315154

Søndergaard, Jens

2013-08-01

117

Modelling open pit shovel-truck systems using the Machine Repair Model  

Energy Technology Data Exchange (ETDEWEB)

Shovel-truck systems for loading and hauling material in open pit mines are now routinely analysed using simulation models or off-the-shelf simulation software packages, which can be very expensive for once-off or occasional use. The simulation models invariably produce different estimations of fleet sizes due to their differing estimations of cycle time. No single model or package can accurately estimate the required fleet size because the fleet operating parameters are characteristically random and dynamic. In order to improve confidence in sizing the fleet for a mining project, at least two estimation models should be used. This paper demonstrates that the Machine Repair Model can be modified and used as a model for estimating truck fleet size in an open pit shovel-truck system. The modified Machine Repair Model is first applied to a virtual open pit mine case study. The results compare favourably to output from other estimation models using the same input parameters for the virtual mine. The modified Machine Repair Model is further applied to an existing open pit coal operation, the Kwagga Section of Optimum Colliery as a case study. Again the results confirm those obtained from the virtual mine case study. It is concluded that the Machine Repair Model can be an affordable model compared to off-the-shelf generic software because it is easily modelled in Microsoft Excel, a software platform that most mines already use.

Krause, A.; Musingwini, C. [CBH Resources Ltd., Sydney, NSW (Australia). Endeaver Mine

2007-08-15

118

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

2013-09-01

119

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

Science.gov (United States)

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

Delgado, J.; Juncosa, R.

2009-04-01

120

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 SciELO South Africa | Language: English 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 phase 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.

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

 
 
 
 
121

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  

Directory of Open Access Journals (Sweden)

Full Text Available 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 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.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 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.

Lásara Fabrícia Rodrigues

2012-09-01

122

The open pit of Garzweiler II. Authorisation secures energy supply and economic power  

International Nuclear Information System (INIS)

In end-March 1995 the North-Rhine-Westphalian Government granted an authorisation for the open pit of Garzweiler II thus permitting brown coal mining in the Rheinish mining region to continue at the same pace as before. At that time the decision was supported by a large majority across parties which made itself felt not only in parliament but also in the Brown Coal Committee and its subcommittees. The author describes the open pit mining project and the course of the authorisation procedure and explains this view he shares of the energy-economic necessity of Garzweiler II. It should be added that in the meantime a red-green coalition has come to power in the Land and the project may be defeated after all. (orig./HP)

1995-06-01

123

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

124

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

International Nuclear Information System (INIS)

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)

1999-01-01

125

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

2012-11-01

126

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

International Nuclear Information System (INIS)

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

2000-06-02

127

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 SciELO Brazil | Language: Portuguese 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 sort [...] e 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 complexidade 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 qua [...] lity 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 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.

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

128

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  

Directory of Open Access Journals (Sweden)

Full Text Available 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 complexidade 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.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 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.

Francisco César Rodrigues de Araújo

2011-03-01

129

Coal Mine Workers' Compensation  

Science.gov (United States)

... Forms | About DOL | Contact Us | Español Office of Workers' Compensation Programs DOL Home > OWCP > DCMWC > DCMWC TOC Division of Coal Mine Workers' Compensation (DCMWC) Division of Coal Mine Workers' Compensation Home ...

130

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 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, au...

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

2012-01-01

131

Real -time dispatching modelling for trucks with different capacities in open pit mines / Modelowanie w czasie rzeczywistym przewozów ci??arówek o ró?nej ?adowno?ci w kopalni odkrywkowej  

Science.gov (United States)

Application of fully automated systems for truck dispatching plays a major role in decreasing the transportation costs which often represent the majority of costs spent on open pit mining. Consequently, the application of a truck dispatching system has become fundamentally important in most of the world's open pit mines. Recent experiences indicate that by decreasing a truck's travelling time and the associated waiting time of its associated shovel then due to the application of a truck dispatching system the rate of production will be considerably improved. Computer-based truck dispatching systems using algorithms, advanced and accurate software are examples of these innovations. Developing an algorithm of a computer- based program appropriated to a specific mine's conditions is considered as one of the most important activities in connection with computer-based dispatching in open pit mines. In this paper the changing trend of programming and dispatching control algorithms and automation conditions will be discussed. Furthermore, since the transportation fleet of most mines use trucks with different capacities, innovative methods, operational optimisation techniques and the best possible methods for developing the required algorithm for real-time dispatching are selected by conducting research on mathematical-based planning methods. Finally, a real-time dispatching model compatible with the requirement of trucks with different capacities is developed by using two techniques of flow networks and integer programming.

Ahangaran, Daryoush Kaveh; Yasrebi, Amir Bijan; Wetherelt, Andy; Foster, Patrick

2012-10-01

132

Coal mine workers` pneumoconiosis  

Energy Technology Data Exchange (ETDEWEB)

The fibrogenic and cytotoxic potential of coal mine dust is independent of the amount of quartz and other inorganic parameters. Results of coal petrographical and organic geochemical investigations of coals and coal mine dust from the Ruhr and Ibbenbueren Region of Germany demonstrate variations of organic dust amount possibly influencing these noxious properties. Coal mine dust of high rank coals is characterized by a pronounced fibrogenic risk. This risk, independent of the quantity of quartz, is probably based on shape variations of different coal macerals. With increasing coalification of the corresponding seam, the vitrinite is enriched in its dust; however, lower concentrations have been determined for inertinite. Vitrinite shows constant shapes and sizes independent of the rank of coal. Inertinite particles with elongated to fibrous shapes tend to larger sizes with increasing coalification. Strikingly, coal mine dust from miners` lungs with high degrees of coal mine workers` pneumoconiosis (CWP) is enriched in inertinite. In contrast, high cytotoxicities in cell tests are known for coal mine dust from low coalfield coals. High concentrations of phenolic compounds can be extracted by dichloromethane from low coalfield coal mine dust. These compounds, which are characterized by a high water solubility and therefore high bioavailability, explain the high cytotoxicities of coal mine dust. Contamination of dust by diesel emissions in the coal mine can act as additionally supporting parameters for extended cytotoxicities. (orig.)

Schulz, H.M. [Baltic Sea Research Inst., Dept. of Marine Geology, Rostock (Germany); Hagemann, H.W. [Dept. of Geology, Geochemistry and Deposits of Petroleum and Coal, Aachen Univ. of Technology (Germany); Wolf, M. [Dept. of Geology, Geochemistry and Deposits of Petroleum and Coal, Aachen Univ. of Technology (Germany); Brammertz, A. [Dept. of Hygiene and Environmental Medicine, Aachen Univ. of Technology (Germany); Einbrodt, H.J. [Dept. of Hygiene and Environmental Medicine, Aachen Univ. of Technology (Germany)

1997-03-01

133

Surface coal mining in Elk Valley, British Columbia  

Energy Technology Data Exchange (ETDEWEB)

Surface coal mining production from Elk Valley and area in southeastern British Columbia began in 1913. Since 1970, five open-pit mines have been put into production: Westar Mining's Harmer and Greenhills Operations; Fording Coal's Fording River Operation; Byron Creek Collieries' Coal Mountain Mine and Crows Nest Resources' Line Creek Operation. In 1983 these mines produced 14.9 million tonnes of raw coal at an average strip ratio of 4.9 bank cubic meters of waste to 1.0 tonne of raw coal. This is 70% of the estimated 21.1 M tonnes annual capacity. Multiple seams are recovered with truck/shovel and dragline equipment. There is a wide range of equipment types in use with a recent trend toward larger and more mobile equipment. Coal mining in Elk Valley involves advancing along strike in four steps: hangingwall waste removal; seam cleaning; coal recovery; and footwall waste removal. Each mine is unique in its approach to these four steps but the truck/shovel methods can be categorized into three main groups; seam dips <35/sup 0/ as at Harmer, Fording and Greenhills; seam dips 35 to 50/sup 0/ as at Line Creek; and seam dips >50/sup 0/ as at Byron Creek. DragLine mining at Fording involves both waste and coal removal by draglines. 12 references, 10 figures.

Nichols, R.S.

1984-11-01

134

Investigation of the cuttability criteria for the use of continuous miners in a opencast coal mine; Surekli yuzey kazicilarin bir komur ocagina uygulanmasinda incelenmesi gerekli kazilabilirlik kriterleri  

Energy Technology Data Exchange (ETDEWEB)

Coal cuttability experiments for a coal mine in Yenikoy, Istanbul are presented. Mechanical cutting tests were performed using the facility provided by the NATO-TU Excavation project on the samples taken from the open pit mine. The effect of cutting parameters, such as depth of cut and tool spacing, on cutting efficiency was investigated, the end product size was analyzed and criteria are given for using surface continuous miners in opencast coal mines. 6 refs., 7 figs., 3 tabs.

Yazici, S.; Acaroglu, M.; Arapoglu, B.; Bilgin, N.; Eskikaya, S.

1996-12-31

135

Coal mining in China  

Energy Technology Data Exchange (ETDEWEB)

Reports on a visit to China in May 1992. The author delivered lectures on occupational safety at a number of mining centers and visited some coal mines. The following subjects are discussed: coal resources, coal reserves and mining conditions, mining systems, personnel, labor productivity, accidents, training systems, organizational models of research on coal mining, organizational models of management and mine safety administration. Chinese authorities representing individual mine unions stated that the accident rate in coal mining in China ranges from 1.0 to 3.0 fatal accidents per 1.0 Mt coal output. According to the author, the accident rate is higher and ranges from 4.0 to 5.0 per 1.0 Mt in state and communal mines and about 10.0 per 1.0 Mt in private mines. According to Chinese trade union leaders, the accident rate in coal mining in China amounts to 10.5 fatal accidents per 1.0 Mt or 1.5 fatal accidents per 1,000 coal miners.

Studenski, R. (Wyzszy Urzad Gorniczy, Katowice (Poland))

1992-01-01

136

Indonesian coal mining  

Energy Technology Data Exchange (ETDEWEB)

The article examines the opportunities and challenges facing the Indonesian coal mining industry and how the coal producers, government and wider Indonesian society are working to overcome them. 2 figs., 1 tab.

NONE

2008-11-15

137

The concurrent validity of learning potential and psychomotor ability measures for the selection of haul truck operators in an open-pit mine  

Directory of Open Access Journals (Sweden)

Full Text Available The purpose of the study was to evaluate the concurrent validity of learning potential and psychomotor ability measures for the prediction of haul truck operator performance in an open-pit mine. Additional goals were to determine the nature of the relationship between learning potential and psychomotor abilities and to assess the relative contributions of these variables as predictors. The predictors were the TRAM 1 Learning Potential test and Vienna Test System subtests that were administered to 128 experienced haul truck operators. The job performance criteria used were spotting in time, corrected tons hauled and supervisor ranking. The concurrent validity of the learning potential and psychomotor ability measures was partially supported. An exploratory factor analysis provided relatively convincing evidence for a general cognitive ability factor (g underlying performance on the learning potential and several psychomotor measures. The existence of a general psychomotor factor was not substantiated in the current study. Suggestions were made for improving design and criterion shortcomings.

Opsomming
Die doel van die ondersoek was om die saamvallende geldigheid van leerpotensiaal en psigomotoriese metings vir die voorspelling van die werkprestasie van sleepvragwabestuurders in ’n oopgroefmyn te beoordeel. Addisionele doelwitte was om die aard van die verwantskap tussen leerpotensiaal en psigomotoriese vermoëns te gepaal en om die relatiewe bydraes van hierdie veranderlikes as voorspellers te bepaal. Die voorspellers was die TRAM 1 Leerpotensiaaltoets en die Vienna Test System subtoetse wat toegepas is op 128 ervare sleepvragwabestuurders. Die werkprestasiekriteria was inteikentyd, gekorrigeerde tonmaat gesleep en toesighouerbeoordeling. Die saamvallende geldigheid van die leerpotensiaal en psigomotoriese metings is gedeeltelik ondersteun. ’n Ondersoekende faktorontleding het die bestaan van ’n algemene kognitiewe vermoëfaktor (g, wat onderliggend aan die leerpotensiaal en verskeie psigomotoriese metings is, redelik oortuigend gestaaf. ’n Algemene psigomotoriese faktor is nie in die huidige ondersoek gevind nie. Voorstelle is gemaak om die ontwerp- en kriteriumtekortkominge te verbeter.

Deléne Visser

2005-10-01

138

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

2012-06-01

139

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

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese 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. Abstract in english 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.

140

Coal mine gas utilisation  

Energy Technology Data Exchange (ETDEWEB)

The article discusses the current status of coal mine gas utilisation in Germany. The Renewable Energy Law pays 6.6-7.7 euros per kWh for electricity generated from gas from coal mines. Coal mine gas such as has to be removed for safety reasons from open mines and coal mine gas from shutdown mines is well suited for use within engine-operated cogeneration plants. The gas engine feeds a generator and the electric energy created is fed into a public network. G.A.S. Energietechnik has developed a membrane system that enables use of gas from active mines with a methane concentration of up to 25%. Coal mine gas from the abandoned Minister Achenbach is being used for cogeneration; Minegas GmbH has been formed as a joint venture for the realisation of Germany's coal mine gas project. In May 2001 Minegas GmbH started operation of its first three cogeneration plants at the former Greisenau mine in Luenen, feeding electricity into the town's network. 2 tabs.

Schieke, N. [G.A.S. Energietechnik GmbH (Germany)

2001-12-01

 
 
 
 
141

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

International Nuclear Information System (INIS)

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)

2002-03-01

142

Crow's Nest Resources exports thermal coal from Line Creek mine. [British Columbia  

Energy Technology Data Exchange (ETDEWEB)

This paper describes development of and operations at the new Line Creek open pit mine in southeastern British Columbia's Elk Valley. First coal was shipped in February, 1982 through Roberts Bank bound for South Korea. At capacity the million dollar project will produce 1.3 million tonnes of metallurgical and 1.4 million tonnes of thermal coal a year. Reserves are estimated at 200 million tonnes in seven coal seams and Crows Nest Resources has plans for expansion. Potential new mines are also planned at Telkwa, B.C. and Bryan Mountain, Alberta when market conditions improve.

1982-09-01

143

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

2012-10-01

144

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

145

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.

Vladimir Štimac

1989-12-01

146

Consequences of Open-Pit Coal Mining on the Geohydraulical System.  

Czech Academy of Sciences Publication Activity Database

. Graz : Techn. University Graz, 1999 - (Bergmann, H.; Krainer, R.; Breinhaelter, H.), s. 1[IAHR Congress /28./. Graz (AT), 22.08.1999-27.08.1999]Grant CEP: GA ?R GA205/97/0783Kód oboru RIV: DA - Hydrologie a limnologie

Hanzlík, Josef; Tr?ková, Ji?ina

147

Mechanism of the slope failure of horizontal thick coal seam under the condition of combined mining  

Energy Technology Data Exchange (ETDEWEB)

Using two methods of numerical simulation and similar simulation, the failure problems of an open-pit slope under the condition of combining open-pit mining with underground mining were analyzed and discussed. The results show that the failure of an open-pit slope is a gradual process. In order to guarantee that normal open-pit mine production works well, the explored boundary must be controlled properly by the vertical stature of safe mining. By analysis of a similar simulation, the mining order can be optimized. 14 refs., 8 figs.

Xian-Quan Liu; Jian-Ming Zhu; Jin-Yan Feng; You Lu; Jian-Ping Wu [University of Science and Technology, Beijing (China)

2008-12-15

148

Evaluating the possibilities of using cellular type scrapers in mining small formations of brown coal  

Energy Technology Data Exchange (ETDEWEB)

The technical and economic inexpedience of using excavators in a number of cases of mining deposits of minerals by an open pit method is noted, in particular, in mining small brown coal formations (this is primarily associated with large capital expenditures associated with the acquisition, delivery and assembly of the excavators in the pit). Because of this, the use of cellular type scrapers for extracting brown coal may be more economical in the cited conditions. The basic concepts for design of installations for scraper mining of brown coal formations are presented; a technical and economic comparison of the possible variants of mining systems is conducted; the stripping coefficient was varied (0.67; 1.0; 1.5 and 2.0) and the width of the coverage and the length of the operational scraping zone. Numerical examples are given of evaluations of the technical and economic effectiveness of scraper mining of brown coal formations.

Losiak, H.; Maziarz, M.; Porebska, M.

1984-01-01

149

Morcinek black coal mine  

Energy Technology Data Exchange (ETDEWEB)

Construction of the Morcinek mine (initially called the Kaczyce mine) started in 1978 and should be completed by 1988. Economic crisis caused cuts in investment. Target coal output of the mine was reduced to 6000 t/d. Coal resources of the mine amount to 560 Mt, recoverable reserves are 356 Mt. The deposit consists of coal seams 0.7-4.5 thick, On the average 1.32 m thick, with dip angles of 5-20 degrees and with a high methane content. Total seam thickness amounts to 18.8 m. The deposit was opened by a system of 3 shafts to 1212.8 m depth. Three working levels are situated at depths of 800 m (ventilation level), 950 m and 1100 m. Coking coal from the Marcinek mine is characterized by high quality (Polish coal type 34-35). Ash content in run-of-mine coal is high (45%). Investment from 1978 to 1986 was 28,000 zlotys, the total investment by 1989 will reach 48,000 zlotys.

1986-12-01

150

Hwasun coal mine  

Energy Technology Data Exchange (ETDEWEB)

This research is for providing appropriate measures on mine safety and long term development base of the operating mines by over whole safety inspections. Hwasun mine of Daihan Coal Corporation was target for this research. Major problems of Hwasun mine are the surface subsidence and water inflow caused by extraction of large scale pocket type ore body. Besides, in most cases, the morale of mine workers and business mind of owners are so depressed that the mine safety is going to be vulnerable anyhow. In this point of view, the regulatory and systematic measures to encourage the workers` morale and owners` investment mind are urgently requested. However, investigation result of underground electrical hazard showed that there is no remarkable problems. The average efficiency of pumps revealed 50% which is considered rather good condition yet, and no coal seams were found which bears excessive carbon dioxide gas. (author). 11 figs., 29 tabs.

Cho, Won Jai; Kang, Chang Hee; Lee, Sang Kwon; Lee, Jong Lim; Kim, Chung Han; Hong, Sung Gyu [Korea Inst. of Geology Mining and Materials, Taejon (Korea, Republic of)

1995-12-01

151

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

152

World coal mining (1)  

Energy Technology Data Exchange (ETDEWEB)

Presents an abridged translation of part of the General Report of the ILO's 11th Coal Mines Committee. General facts and figures concerning world coal production and international coal trading are given. Comprehensive tables give breakdowns by country of world hard coal and brown coal production, and of coal exports and imports, for years 1975 to 1980. There are brief notes on the production situations of various countries, and on the amounts traded amongst them. For example, it is noted that the main growth in production has occurred in Asia, with European production declining each year. Australian coal exports increased 11 times over 1960-1970, and 2.3 times over 1970-1980, at present earning 1500 m million Australian dollars, or 12.5% of total export earnings. Japan is the world's biggest importer: 58.5 Mt in 1979, or 25.6% of total world coal imports. (In Japanese)

1982-04-01

153

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

2012-05-01

154

Special problems in the exploration and operation of loose-rock open-pit mines in developing and threshold countries. Besondere Probleme beim Aufschluss und Betrieb von Lockergesteinstagebauen in Entwicklungs- und Schwellenlaendern  

Energy Technology Data Exchange (ETDEWEB)

The world-wide activities of RHEINBRAUN-Consulting, a RHEINBRAUN AG subsidiary, in the field of open-pit mining technology is reported briefly. As a consulting company, it is concerned with the exploration and assessment of deposits, opening-up feasibility studies, the process of opening-up proper, the installation of required operational infrastructure, the structuring of operation in line-type management, subsequent in-service consulting, handover to operator/project organizer. The author reports experience gained in Asia, Latin America and Southern Europe. Special reference is made to the introduction continuous mining and conveying technology, to technology transfer and mastering of the 'new' technology by the operator/project organizer complete with the necessary planning implications. (MOS).

Gallisch, J.H. (Rheinbraun-Consulting GmbH, Koeln (Germany, F.R.). Abt. Projektwesen)

1987-01-01

155

Coal mine site reclamation  

Energy Technology Data Exchange (ETDEWEB)

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

NONE

2013-02-15

156

Introducing the Kushiro coal mine  

Energy Technology Data Exchange (ETDEWEB)

Mining operations at the Kushiro Coal Mine commenced in April 2002. The mine covers a zone 2300 meters below sea level, including the deep-lying coal seams risk capable of being mined at the time of the Taiheiyo Coal Mine. The article describes mining technologies used including the comprehensive safety management system. The international exchange projects with which the Kushiro Coal Mine Co. is involved include projects for overseas trainees in Japan and dispatch of Japanese engineers to Vietnam, China and Indonesia. 3 figs.

Matsumoto, H. [Kushiro Coal Mine Co., Ltd. (Japan)

2006-09-15

157

Questions of geological mine surveying services at shale mines. Voprosy geologo-marksheyderskoy sluzhby na slantsevykh shakhtakh  

Energy Technology Data Exchange (ETDEWEB)

This collection contains materials on problems and the state of scientific research work at mines and open pits of the Baltic shale basin in the field of geology and mine surveying services. It is intended for mine surveying geologist at shale mines, and will be useful to workers in the coal industry and at nonferrous metallurgy mines.

Allik, A.M.; Kozhukhov, M.P.

1981-01-01

158

The mining engineer of tomorrow. [Coal mining  

Energy Technology Data Exchange (ETDEWEB)

This issue is devoted to the training of mining engineers, highlighting present day training requirements, planning of cadres, problems of professional and social standing, and particulars of schooling and specialization. The Bulgarian Higher Mining and Geology Institute's methods of instruction are discussed and specialist curricula, to include mining technology, surveying, electrical systems in mines, ore dressing, geology, mine research, and hydrogeology, are proposed. A training program for coal mining specialists is outlined, and more specialized training for designers of underground coal mines is suggested. (In Bulgarian)

1980-08-01

159

Coal mine subsidence  

International Nuclear Information System (INIS)

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

1991-01-01

160

Women in coal mining  

Energy Technology Data Exchange (ETDEWEB)

This paper presents views of a female mine engineer with regard to acceptance of women into America's coal industry. Topics include how attitude toward women in mining has greatly changed, how female miners eroded the ''macho'' image, and how unbalanced media coverage slowed acceptance. Suggests that the transition period is over and that women are firmly entrenched in the industry. Concludes that more should be done in the areas of motivation and safety.

Cooley, F.

1982-11-01

 
 
 
 
161

Methane emissions from coal mining  

International Nuclear Information System (INIS)

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

162

Hydraulic coal mining  

Energy Technology Data Exchange (ETDEWEB)

This paper describes the method of hydraulic mining from its introduction by the Hungarian engineer, Hell, to its current utilization in the coal industry. It analyses the advantages and disadvantages of the method as applied to steeply-inclined seams. (In Spanish)

Fernandez Villaverde, J.I.

1977-10-01

163

Coal mine ventilation  

Energy Technology Data Exchange (ETDEWEB)

This article describes the use of centrifugal fans for longwall mining ventilation, and in coal preparation plants. Examples are given of the use of centrifugal fans as bleeder shaft fans, in degas holes, and for auxiliary face ventilation. 4 figs., 3 tabs.

Gutzwiller, L. [Robinson Industries, Zelienople, PA (United States)

1997-12-01

164

Highwall mining of coal  

Energy Technology Data Exchange (ETDEWEB)

An experimental highwall mining system was developed from readily available equipment and trialled in an open-cut coal mine. The system was to make approximately parallel drives into the coal seam to a penetration of about 30 m from the highwall. The trial was the first stage of a multi-stage developmental process towards a deep penetration, high recovery highwall mining system. In total, ten adjacent drives were mined, under immediate roofs of shale, sandstone or interbeddings with conditions ranging, in the Geomechanics Classification, from fair to good. Drives were 3 m wide, except one which was 4 m. The widths of coal pillars between drives ranged from 1.8 to 3.5 m, demonstrating a recovery ratio of 60%, even under the restricted experimental conditions. Both roofs and pillars were generally stable. Estimated productivity exceeded 100 tonne/man/shift. Although there are important technical issues requiring developmental solutions in the long term, high wall mining was shown to be sufficiently attractive to warrant proceeding to the next stage of development, with a medium penetration production system.

Shanks, D.H. (and others) (BHP Melbourne Research Laboratories (Australia))

1990-03-01

165

Reasonable block-supporting structure for open-pit planning model  

Energy Technology Data Exchange (ETDEWEB)

When modelling open pit mines for planning purposes, it is necessary to adopt a suitable block structure to fit with the chosen mathematical model. Different block supporting structures are analysed and compared and recommendations made for their applications.

Zhang, Y.D.

1985-08-01

166

UNA APROXIMACIÓN A LA PLANEACIÓN MINERA A CIELO ABIERTO DESDE UN ENFOQUE BASADO EN DECISIONES BAJO INCERTIDUMBRE / AN APPOXIMATION TO THE OPEN PIT MINE PLANNING APPROACH BASED ON DECISIONS UNDER UNCERTAINTY  

Scientific Electronic Library Online (English)

Full Text Available SciELO Colombia | Language: Spanish Abstract in spanish En este artículo se presenta en primer lugar una descripción del proceso de planeamiento minero desde un punto de vista clásico y su relación con los actuales procesos de planeamiento minero que tienen como base la optimización en sus diferentes etapas. Seguidamente, se realiza un acercamiento a los [...] procesos de planeación minera a cielo abierto desde un enfoque basado en decisiones bajo incertidumbre. Por último, se lleva a cabo un análisis crítico de los artículos encontrados clasificándolos en cinco categorías: Modelamiento geológico; Planeamiento minero; Evaluación financiera; Decisiones bajo incertidumbre y modelos de optimización. Abstract in english This article first presents a description of the mine planning process from a classical view and its relation to existing mine planning processes that are based on optimization in its various stages. Then be made an approach to planning processes open pit mining from an approach based on decisions u [...] nder uncertainty. Finally, it performs a critical analysis of the items found divided into five categories: geological models, mine planning, financial evaluation, decisions under uncertainty and optimization models.

GIOVANNI, FRANCO SEPÚLVEDA; JOHN WILLIAN, BRANCH BEDOYA; PATRICIA, JARAMILLO ÁLVAREZ.

2010-11-30

167

Jongam coal mine  

Energy Technology Data Exchange (ETDEWEB)

This research is for providing appropriate measures on mine safety and long term development base of the operating mines by over whole safety inspections. Jongam mine owned by Samtan Co. Ltd. was target for this research. Major issue of Jongam mine was revealed that lack of pumping capacity to treat ever increasing underground water which is mainly due to the inflow from the adjacent closed mines, and insufficient investment for the preparation of long term program. Besides, in most cases, the morale of mine workers and business mind of owners are so depressed that the mine safety is going to be vulnerable anyhow. In this point of view, the regulatory and systematic measures to encourage the workers` morale and owners` investment mind are urgently requested. However, investigation result of underground electrical hazard showed that there is no remarkable problems. The average efficiency of pumps revealed 50% which is considered rather good condition yet, and no coal seams were found which bears excessive carbon dioxide gas. (author). 21 figs., 42 tabs.

Cho, Won Jai; Kang, Chang Hee; Lee, Sang Kwon; Lee, Jong Lim; Kim, Chung Han; Hong, Sung Gyu [Korea Inst. of Geology Mining and Materials, Taejon (Korea, Republic of)

1995-12-01

168

Experimental coal mining without miners  

Energy Technology Data Exchange (ETDEWEB)

Experimental methods of mining steeply inclined and thin coal seams in Czechoslovakia without the presence of miners are described. Characterized are: mining steeply inclined seams by chain scrapers, coal saws and water jets. An installation for simultaneously mining and supporting steeply inclined coal seams is also described and depicted. Methods of roof or rib supports are also characterized and depicted: non-removable cribbing and DVP-3 suoports. Mining thin and very thin coal seams by scraper-plows is described as well as support systems used in thin coal seams. (In Russian)

Matushek, Z.

1980-01-01

169

Mining technology and policy issues 1983  

International Nuclear Information System (INIS)

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

1983-09-12

170

Noise in Underground Coal Mines.  

Science.gov (United States)

The Bureau of Mines conducted an environmental noise survey to determine the noise levels to which underground coal mine employees are exposed, to evaluate noise survey techniques and equipment, and to compare noise exposures using two criteria, Walsh-Hea...

J. A. Lamonica R. L. Mundell T. L. Muldoon

1971-01-01

171

Deep mining at Coal Cliff  

Energy Technology Data Exchange (ETDEWEB)

One of the NSW mines facing increasing difficulties is Coal Cliff, Australia's deepest and oldest underground coal mine. The owners have implemented a strategy that gives the mine a chance to stay open for up to three years, provided productivity targets are met; however, production problems are compounded by geotechnical difficulties resulting from the working depth of 520 m. The Wongawilli method which is a variant of room and pillar mining is implemented.

1988-01-01

172

Coal mining and water quality  

Energy Technology Data Exchange (ETDEWEB)

Coal mining activities frequently impinge on water resources. This report considers the impact of coal extraction on water resources and potential causes of water pollution. The disruption of surface water and groundwater systems by surface and underground mining is discussed. Many mine waters are relatively clean and unpolluted. However, some discharges are acidic and contain high concentrations of dissolved metals and trace elements. Acid mine drainage may cause serious and highly visible pollution. Methods adopted to prevent contamination of mine waters are reviewed, together with active and passive options to treat waters discharged from mining activities. The report examines methods to assess and manage water resources so as to avoid pollution.

Clarke, L.B.

1995-07-01

173

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

174

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

175

Australian coal  

Energy Technology Data Exchange (ETDEWEB)

Total export shipments of coal in Australia in the year ending June 30 1985 reached a record of 83.8 Mt. The export trade is expected to bring in an income of 4 billion Australian dollars in the current year making coal Australia's biggest revenue-earning export commodity. This article presents a brief overview of the Australian coal industry with production and export statistics and information on major open pit and underground mines.

1985-11-01

176

Disposal of coal mine waste in active underground coal mines  

Energy Technology Data Exchange (ETDEWEB)

The Bureau of Mines initiated a mine site specific design of a system of underground disposal of coal wastes. One of the two contracts to prepare this design was awarded to Foster Miller Associates, Inc. (FMA)/Western Slope Carbon, Inc. (WCS). This paper describes the mine refuse, waste disposal system and equipment selection, influence of the disposal system on mine productivity, miner health and safety, and the phase II program for system installation and evaluation. 3 refs.

Rubin, L.S.; Burnett, M.; Amundson, A.; Colaizzi, G.J.; Whaite, R.H.

1981-01-01

177

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

178

Mining chemicals and coal washing  

Energy Technology Data Exchange (ETDEWEB)

The paper presents an overview of the application of mining chemicals in coal washing. While traditionally chemical treatment was limited to thickening fine refuse prior to disposal, the growing importance of fine coal washing has led to new applications for existing mining chemicals and considerable development effort to find new chemistries to satisfy modern fine coal washing technology. The role of the chemicals is considered in mining and processing operations as follows: coarse coal washing; coal washing; and fine coal washing. The paper also considers the use of chemicals in coal flotation, flotation concentrate dewatering and flotation tailings dewatering. In the future, growth potential for the chemical industry lies in the treatment of fine coal and particularly coal-water slurry or coal-oil slurry technology. Whether for reasons of efficient pipeline transportation, slurry stability or efficient combustion all agree that slurry preparation will involve fine grinding and deep cleaning of high rank coals. New product development areas are new flotation reagents for ultrafine coal, dispersants and slurry stabilizers for high solids slurries and new flocculants for dewatering ultrafine coal slurries.

Strydom, P.J.

1986-01-01

179

Coal mine subsidence and structures  

International Nuclear Information System (INIS)

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

1988-05-11

180

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

 
 
 
 
181

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

2010-10-01

182

Coal mining and water quality  

Energy Technology Data Exchange (ETDEWEB)

Coal mining activities frequently impinge on water resources. This report considers the impact of coal extraction on water resources and potential causes of water pollution. The disruption of surface water and groundwater systems by surface and underground mining is discussed. Many mine waters are relatively clean and unpolluted. However, some discharges are acidic and contain high concentrations of dissolved metals and trace elements. Acid mine drainage may cause serious and highly visible pollution. Methods adopted to prevent contamination of mine waters are reviewed, together with active and passive options to treat waters discharged from mining activities. Prudent management of water resources requires careful monitoring throughout mining operations and during land reclamation activities. Unfortunately, in the past many sites were abandoned with inadequate reclamation and closure measures, leaving a legacy of contaminated drainage and water pollution. The report examines methods to assess and manage water resources so as to avoid pollution. 163

Clarke, L.B. [IEA Coal Research, London (United Kingdom)

1995-06-01

183

High productivity longwall mining system in Velenje Coal Mine  

Energy Technology Data Exchange (ETDEWEB)

A constant and ever present wish to improve the extraction ratio had the greatest influence on the development of mining in the Velenje Coal Mine. The changes of mining methods used were caused by economical, technological and underground safety reasons. This paper presents a concept of high productive longwall mining system in the Velenje Coal Mine. 4 figs.

Kolenc, M.; Medved, M.; Hudej, M. [Rudnik Lignite Velenje (Slovak Republic). Velenje Coal Mine

1994-12-31

184

Methane emissions from coal mining  

International Nuclear Information System (INIS)

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

1993-07-01

185

Legalising small coal mines in Colombia  

Energy Technology Data Exchange (ETDEWEB)

It was estimated that in 1996 some 97% of the coal mines in Colombia comprised small-scale operations. This paper discusses the legal framework of the Colombian mining sector, the regulatory framework of small-scale mining, the illegal mining issue, and the Colombian approach to illegal coal mining. 1 fig., 13 tabs.

Espinosa Bula, D.

2000-07-01

186

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

187

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

2012-01-01

188

Resarch on coal mine robots in China  

Energy Technology Data Exchange (ETDEWEB)

The necessity and possibility of the research and development on coal mining robot in China are discussed in the paper, several styles of coal mine robots which should be given priority to researching and developing are suggested, the present condition of the coal mine robot development in China is analysed and then the first project of coal mine robot in China - Robotized Drilling Machine (RDM) is introduced. Other uses of robots include: fire detection; wall sealing; shotcreting; and support robots. 1 figs.

Hao, J.; He, F.; Shi, W.; Xu, S. [China University of Mining and Technology, Xuzhou (China). Center for Coal Mine Automation and Robot Research of China

1996-12-31

189

On fieldbus standard for coal mine monitoring  

Energy Technology Data Exchange (ETDEWEB)

The requisite performance of fieldbus for monitoring coal mine is discussed in this paper. The performance of a few principal fieldbus and its adaptability for coal mine is studied. The scheme of power supply of fieldbus for coal mine monitoring is researched. The results of this study show that the advanced fieldbus technology can be perfectly applied in coal mine and the fieldbus, which is based on CAN, is a better selection than others. 3 refs., 2 figs., 2 tabs.

Cheng, J.; Meng, X. [Xiangtan Polytechnic University, Xiangtan (China). Dept of Information and Electrical Engineering

2001-12-01

190

120 years of coal mining in the Balkan coal basin  

Energy Technology Data Exchange (ETDEWEB)

The 120 year history of coal mining in the 350 km/sup 3/ area of the Balkan coal basin is described. The role of foreign geologists in the geological exploration of this coal basin is highlighted. In the 80-300 m thick coal bearing zone there are eight 0.1-4.0 m thick coal seams. The calorific value of coal is 6500-8500 kcal/kg. A dozen small private Bulgarian and multinational stock holding coal mines operated initially. The first coking plant was built in 1899. In the period of 1921-1929 another dozen coal mines entered operation. In 1939-1940 the annual coal production was 240,000 t. The coal mines were nationalized in 1947. The initial state-owned coal mining enterprise was later split into six coal mines and in 1956 once again merged into one coal mining enterprise, called the Balkan mine basin. A central coal preparation plant and a metallurgical plant were built along with a central equipment repair and maintenance plant. In 1976 two power stations (Avram Stoyanov and Cherno) were intergrated into the Balkan mine basin. In 1979 a long-term program was adopted which foresees 50% increase in production of coking coal and 200-300% increase in production of brown coal. Wide-scale geological exploration (more than 80,000 m of boreholes) is planned. The activity of the Bulgarian Trade Union of Miners is also described.

Dimitrov, A.

1984-02-01

191

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

192

Analysis of the strata buckling mechanism at the Grand-Baume coal mine, France  

Energy Technology Data Exchange (ETDEWEB)

This paper describes a three hinge strata buckling mechanism and its influence on the west wall of the Grand-Baume open pit coal mine. The analysis is extended to investigate the stability at the projected maximum depth of the pit. In order to study and quantify the failure mechanism, two analysis methods were employed. The first method used the base friction table on which scale models of the slope were represented. The second method made use of the mathematical modelling of the slope stability by means of a limit equilibrium computer program, specific to three hinge strata buckling. Details on the application and the results of the two methods are presented. These are then compared with the field observations at the Grand-Baume mine. 15 refs, 10 figs., 2 tabs.

Choquet, P.; Hadjigeorgiou, J.; Manini, P.; Mathieu, E.; Soukatchoff, V.; Paquette, Y. (Universite Laval, Quebec City, PQ (Canada))

1993-01-01

193

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

194

Stability of spoil piles at two coal mines in Turkey: Geotechnical characterization and design considerations  

Energy Technology Data Exchange (ETDEWEB)

One of the major problems in surface mining of coal is the stability of disposed overburden materials. Geotechnical considerations are thus very important in rational planning for disposal, reclamation, treatment, and utilization of mine waste material. The subject of this study is the stability of spoil piles at open pit coal mines located in the Central Anatolia, Turkey. The coal is produced from two adjacent open pits. While a large portion of the spoil piles dumped at the Central Pit has experienced slope failure, no spoil pile instability has been experienced at the South Pit. This article outlines the results of field and laboratory investigations to describe the mechanism of the spoil pile failure in the Central Pit and the geotechnical design considerations for the spoil piles at the South Pit based on the experience gained from the previous spoil failures. Limit equilibrium analysis carried out for the large-scale spoil failure indicated that deep-seated sliding along the interface between underclay and dragline spoil piles and rotational slip through the overburden spoil material may be all occurring simultaneously as water migrates through these areas. Sensitivity analyses revealed that spoil pile instability is not expected at the South Pit when the current spoil placement method is used as long as the generation of high water pressures in the spoil piles is not permitted. Comparisons between the results of finite element analysis and long-term monitoring data also confirmed the results of sensitivity analyses and indicated a vertical deformation associated with compaction of the spoil material.

Kasmer, O.; Ulusay, R. [Hacettepe University, Ankara (Turkey). Dept. of Geological Engineering

2006-11-15

195

The greening of closed coal mines  

Energy Technology Data Exchange (ETDEWEB)

Describes changes to the 1988 General Development Order following the privatization of British Coal. The changes impose restoration requirements on closed UK coal mines where (except in certain circumstances) none previously existed. The changes will have important coal implications for the new coal mining licensees. Details are given of the type of restoration required and the time limits for restoration.

Morris, M. [Nabarro Nathanson (United Kingdom)

1995-03-01

196

New open pit operating method at Aumance  

Energy Technology Data Exchange (ETDEWEB)

This operating unit at the Houilleres du Centre Midi (Coal Mines of the Centre South Region), in France, had to change the operating method of its mine because of a change in the deposit and the proximity of populated zones. To scour a bed of sandstone, the unit replaced 'load and haul' by 'rip' and 'push', using a D10 Cat Bulldozer equipped with an impact ripper. 2 photos.

Laversanne, J.

1993-04-01

197

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...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

198

78 FR 79010 - Criteria to Certify Coal Mine Rescue Teams  

Science.gov (United States)

...MSHA-2013-0037] Criteria to Certify Coal Mine Rescue Teams AGENCY: Mine Safety...Administration (MSHA) has updated the coal mine rescue team certification criteria...to certify the qualifications of a coal mine rescue team is that team...

2013-12-27

199

Major new Colombian coal mine  

Energy Technology Data Exchange (ETDEWEB)

Amcoal with partners Rio Tinto and Glencore, is developing a new large coal export operation in Colombia, following an agreement last year to combine the Cerrejon Centrale and Oreganal coal properties. Three major groups have been awarded a contract to develop the Cerrejon Sur block. Five new mining concessions in the Guajira region south of El Cerrejon will be developed. Colombia has proven and inferred coal reserves amounting to more than 20,000 Mt and hopes to be producing 50 Mt/y by 2005. 1 tab., 1 map.

Chadwick, J.

1998-09-01

200

Planning reconstruction of a coal mine. [Poland  

Energy Technology Data Exchange (ETDEWEB)

The economic aspects of modernization of underground black coal mines in Poland are evaluated. Regulations on types of investment in coal mines issued by the Ministry of Mining and Energy Production are reviewed. Modernization of an existing coal mine leading to coal output increase is more expedient than construction of a new coal mine. Investment associated with coal output increase in an existing coal mine in Poland ranged from 234.87 million zlotys to 307.18 million zlotys per 1000 t/d in 1976 and 1977. Investment associated with construction of new coal mines was higher and amounted to 547.37 million zlotys per 1000 t/d. Planning modernization of a coal mine is analyzed. The following stages of planning are evaluated: assessment of coal reserves, coal mine equipment and manpower, analysis of modernization prospects from the point of view of technology, development of a number of alternative reconstruction designs, economic evaluations of alternative designs and selection of the optimum one, other stages of mine modernization. Recommendations are made for planning mine modernization. 7 references.

Pazdziora, J.

1983-01-01

 
 
 
 
201

Noise in underground coal mines  

Energy Technology Data Exchange (ETDEWEB)

The Bureau of Mines conducted an environmental noise survey to determine the noise levels to which underground coal mine employees are exposed, to evaluate noise survey techniques and equipment, and to compare noise exposures using two criteria, Walsh-Healey and CHABA, for determining allowable exposures that were not under consideration for the Federal Coal Mine Health and Safety Act of 1969. Time study techniques and Bureau-approved standard sound level meters were employed. The shift exposures of 20 percent of the miners studied were in excess of the safe standards established by both criteria. The shift exposures calculated using the Walsh-Healey criteria were greater than those calculated using the CHABA criteria owing to the intermittent nature of the exposure. Ultimately the CHABA criteria were rejected, and the Walsh-Healey criteria were adopted.

Lamonica, J.A.; Mundell, R.L.; Muldoon, T.L.

1971-01-01

202

Novel techniques related with coal mining  

Energy Technology Data Exchange (ETDEWEB)

Complex methods of geotechnical, physical-chemical and biological treatment of coal are discussed. Underground coal gasification/combustion combined with coal bed methane drainage from the coal mass and physical-chemical-microbiological coal mass treatment are considered as one of the most ecologically clean and resource saving technologies. A new approach to coal electricity generation on the basis of borehole coal mining (coal gasification/combustion in situ) with coal bed methane drainage integrated with mine mouth combined cycle power plant is promoted. 7 refs., 2 figs.

Vasyuchkov, Yu.; Vorobjev, B.; Vais, K.; Vasyuchkov, M.; Vorobjev, S. [Moscow State Mining University, Moscow (Russian Federation). Mineral Ltd.

1999-07-01

203

A technique for calculating the resistance of an open pit protective grounding  

Energy Technology Data Exchange (ETDEWEB)

A technique is given for calculating the amount of resistance of an open pit protective grounding network allowing for resistance of the body to ground transitions of moving pit machines, mechanisms and electric installations. The grounding network, made according to the proposed calculation, can ensure the required degree of safety without local grounding devices (in mobile connection points and elsewhere) and, in certain favorable cases, without setting up a central grounder or increasing its contact resistance. Such a possibility is practically completely valid in connection with introduction of mining machinery with a large unit capacity at modern open pits.

Bariyev, N.V.

1981-01-01

204

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

205

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

International Nuclear Information System (INIS)

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

1995-12-11

206

METHANE EMISSIONS FROM ABANDONED UNDERGROUND COAL MINES  

Science.gov (United States)

The paper summarizes current research on abandoned underground coal mines. t forms an initial basis for developing an inventory of methane emissions from such mines. arly measurements have shown that some abandoned coal mines can liberate large volumes of high quality gas (up to ...

207

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

Scientific Electronic Library Online (English)

Full Text Available SciELO South Africa | Language: English 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 sur [...] face 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 substantial 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..

208

Electrical earthing in coal mines  

Energy Technology Data Exchange (ETDEWEB)

Changes in the utilisation of electricity and equipment design and the continuous development of improved methods of protection all contribute to a need to periodically update information on available techniques to protect electrical equipment against dangerous earth leakage currents. The paper describes procedures thought best for application in British coal mines. Aspects considered are: reasons for connections to earth; earthing arrangements; connecting transformers in parallel; three phase and single phase systems; earthing of mining apparatus; interference; mobile plant and welding sets; lightning conductors and regulations relating to earthing. 8 references.

1986-01-01

209

Coal mining operators' geotechnology colloquium  

Energy Technology Data Exchange (ETDEWEB)

This Australian coal mining operators geotechnology colloquium is a contribution to Dr. Alan James Hargraves, Australian geotechnical founding father. the papers cover the history, main challenges and main achievements of Australian coal mining. Most of the papers discuss the technical issues from geotechnical aspects. Selected papers are abstracted on the IEACR Coal Abstracts CD-ROM.

Baafi, E.Y. [ed.

2001-07-01

210

Development of systems for manless coal mining  

Energy Technology Data Exchange (ETDEWEB)

This article discusses problems associated with mining thin and very thin coal seams in the Donetskugol' mines. About 31% of coal reserves in the mines lies in thin coal seams up to 0.7 m thick, whereas output from these seams amounts to 11.3% of the total coal output. Equipment used in 1981 for thin seam mining is discussed: 72% of coal output was won by Kirovets wide web coal cutters, 15.8% by scraper plows, 12.2% by MK-67 narrow web cutter loaders. Labor productivity of miners ranges from 1.5 to 2.5 t/shift. Mining systems for manless mining of thin and very thin coal seams being introduced in the Donetskugol' mines are evaluated: the BUG-3 auger mining system, the BShU auger system, new types of scraper plows, the UBGM drilling system for mine drivage in thin coal seams. Operation of the systems is discussed. Economic aspects of manless mining in Donbass mines are evaluated.

Rud, A.M.

1982-08-01

211

Crisis management for coal mining  

Energy Technology Data Exchange (ETDEWEB)

The author says coal mining requires the precise execution of tasks to minimize risks. Acknowledging risks and attempting to influence their impact is the basis of crisis management. Crisis management skills include recognizing, measuring, handling, and resolving any of the crisis situations an organization faces during the course of business. The author outlines four phases of a typical crisis and tells how to deal with each. He then discusses crisis forecasting and how to calculate the Crisis Impact Value.

Britton, S.

1987-12-01

212

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

213

Surface Coal Mining Machinery and Equipment.  

Science.gov (United States)

Surface coal mining equipment was studied to determine existing equipment practices and technology and its compatibility with mining techniques and reclamation requirements. In addition, the availability and economics of alternative equipment types were d...

W. J. Habeck

1975-01-01

214

Complementarities Between Coal Mining Machinery Industry and Coal Mining Industry: Evidence from China 1991-2006  

Directory of Open Access Journals (Sweden)

Full Text Available This study used VAR model to analyze and verify the complementaries between Chinese coal mining machinery enterprises and coal mining enterprises from the perspective of static state and dynamic state, it concluded that: there is a co-integration relationship between the actual output value of Chinese coal mining machinery enterprises and the actual value of Chinese coal mining enterprises, namely, there is a long-term and stable equilibrium; Chinese coal mining machinery enterprises have advanced the development of Chinese coal mining enterprises, while the development of Chinese coal mining enterprises also have played a significant role in promoting Chinese coal mining machinery enterprises; in the short term, the changes of the actual output value of Chinese coal mining machinery enterprises are due to themselves as well as the actual output value of Chinese coal mining enterprises and the changes of actual output value of Chinese coal mining enterprises are also due to themselves and the actual output value of Chinese coal mining machinery enterprises.

He Xiao-yan

2013-01-01

215

Water pollution from abandoned coal mines  

Energy Technology Data Exchange (ETDEWEB)

The paper was written at the time of the Coal Industry Bill, providing for the privatisation of British Coal, was at committee stage. Although the Bill does not specifically address the issue of mine pumping, the cessation of pumping at disused pits may cause serious groundwater and surface water pollution. The paper quotes examples of pollution from abandoned mines (metal, coal, mineral) in the United Kingdom. The case of acidic water seeping from the closed Wheal Jane tin mine, the current problem of pumping the Durham coalfield, and the pollution of the Rhymney River with iron from the old coal mines, Pengam and Britannia are discussed. 47 refs.

Hughes, P. [House of Commons, London (United Kingdom). Science and Environment Section, Department of the Library

1994-03-11

216

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

217

Case study: longwall top coal caving at Austar coal mine  

Energy Technology Data Exchange (ETDEWEB)

Glenn Sobey presented delegates at the Hunter Valley Coalfields conference on 28th March, with an overview of Austar Coal Mine's introduction and application of longwall top coal caving in Australia. 11 figs.

NONE

2008-05-15

218

Coal mining equipment  

International Nuclear Information System (INIS)

The word in longwall components is big, and these larger components have price tags to match. The logic behind the greater investment is that it will yield high production rates and good uptime statistics. This is true in most cases. More important than single-shift tonnage records, average shift production continues to climb upwards. This paper reports on the quality, and more significantly, the quantity of service supplied for long-wall equipment, which has reached levels that would have been seen as unachievable when longwall mining was first introduced in the U.S. The school of thought then was that longwall would increase productivity in part by reducing the number of production units and thus reducing the number of personnel employed underground. The expectation of fewer employees turned out to be unrealistic. That was probably one reason that some early attempts to install longwall system looked more like failures than vision of the future

1991-01-01

219

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

Energy Technology Data Exchange (ETDEWEB)

About 7 Mt of high volatile bituminous coal are produced annually from the four coal zones of the Upper Paleocene Marcelina Formation at the Paso Diablo open-pit mine of western Venezuela. As part of an ongoing coal quality study, we have characterized twenty-two coal channel samples from the mine using organic petrology techniques. Samples also were analyzed for proximate-ultimate parameters, forms of sulfur, free swelling index, ash fusion temperatures, and calorific value. Six of the samples represent incremental benches across the 12-13 m thick No. 4 bed, the stratigraphically lowest mined coal, which is also mined at the 10 km distant Mina Norte open-pit. Organic content of the No. 4 bed indicates an upward increase of woody vegetation and/or greater preservation of organic material throughout the life of the original mire(s). An upward increase in telovitrinite and corresponding decrease in detrovitrinite and inertinite illustrate this trend. In contrast, stratigraphically higher coal groups generally exhibit a 'dulling upward' trend. The generally high inertinite content, and low ash yield and sulfur content, suggest that the Paso Diablo coals were deposited in rain-fed raised mires, protected from clastic input and subjected to frequent oxidation and/or moisture stress. However, the two thinnest coal beds (both 0.7 m thick) are each characterized by lower inertinite and higher telovitrinite content relative to the rest of Paso Diablo coal beds, indicative of less well-established raised mire environments prior to drowning. Foreland basin Paleocene coals of western Venezuela, including the Paso Diablo deposit and time-correlative coal deposits of the Tachira and Merida Andes, are characterized by high inertinite and consistently lower ash and sulfur relative to Eocene and younger coals of the area. We interpret these age-delimited coal quality characteristics to be due to water availability as a function of the tectonic control of subsidence rate. It is postulated that slower subsidence rates dominated during the Paleocene while greater foreland basin subsidence rates during the Eocene-Miocene resulted from the loading of nappe thrust sheets as part of the main construction phases of the Andean orogen. South-southeastward advance and emplacement of the Lara nappes during the oblique transpressive collision of the Caribbean and South American tectonic plates in the Paleocene was further removed from the sites of peat deposition, resulting in slower subsidence rates. Slower subsidence in the Paleocene may have favored the growth of raised mires, generating higher inertinite concentrations through more frequent moisture stress. Consistently low ash yield and sulfur content would be due to the protection from clastic input in raised mires, in addition to the leaching of mineral matter by rainfall and the development of acidic conditions preventing fixation of sulfur. In contrast, peat mires of Eocene-Miocene age encountered rapid subsidence due to the proximity of nappe emplacement, resulting in lower inertinite content, higher and more variable sulfur content, and higher ash yield. (author)

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

2007-08-01

220

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

Science.gov (United States)

About 7??Mt of high volatile bituminous coal are produced annually from the four coal zones of the Upper Paleocene Marcelina Formation at the Paso Diablo open-pit mine of western Venezuela. As part of an ongoing coal quality study, we have characterized twenty-two coal channel samples from the mine using organic petrology techniques. Samples also were analyzed for proximate-ultimate parameters, forms of sulfur, free swelling index, ash fusion temperatures, and calorific value. Six of the samples represent incremental benches across the 12-13??m thick No. 4 bed, the stratigraphically lowest mined coal, which is also mined at the 10??km distant Mina Norte open-pit. Organic content of the No. 4 bed indicates an upward increase of woody vegetation and/or greater preservation of organic material throughout the life of the original mire(s). An upward increase in telovitrinite and corresponding decrease in detrovitrinite and inertinite illustrate this trend. In contrast, stratigraphically higher coal groups generally exhibit a 'dulling upward' trend. The generally high inertinite content, and low ash yield and sulfur content, suggest that the Paso Diablo coals were deposited in rain-fed raised mires, protected from clastic input and subjected to frequent oxidation and/or moisture stress. However, the two thinnest coal beds (both 0.7??m thick) are each characterized by lower inertinite and higher telovitrinite content relative to the rest of Paso Diablo coal beds, indicative of less well-established raised mire environments prior to drowning. Foreland basin Paleocene coals of western Venezuela, including the Paso Diablo deposit and time-correlative coal deposits of the Ta??chira and Me??rida Andes, are characterized by high inertinite and consistently lower ash and sulfur relative to Eocene and younger coals of the area. We interpret these age-delimited coal quality characteristics to be due to water availability as a function of the tectonic control of subsidence rate. It is postulated that slower subsidence rates dominated during the Paleocene while greater foreland basin subsidence rates during the Eocene-Miocene resulted from the loading of nappe thrust sheets as part of the main construction phases of the Andean orogen. South-southeastward advance and emplacement of the Lara nappes during the oblique transpressive collision of the Caribbean and South American tectonic plates in the Paleocene was further removed from the sites of peat deposition, resulting in slower subsidence rates. Slower subsidence in the Paleocene may have favored the growth of raised mires, generating higher inertinite concentrations through more frequent moisture stress. Consistently low ash yield and sulfur content would be due to the protection from clastic input in raised mires, in addition to the leaching of mineral matter by rainfall and the development of acidic conditions preventing fixation of sulfur. In contrast, peat mires of Eocene-Miocene age encountered rapid subsidence due to the proximity of nappe emplacement, resulting in lower inertinite content, higher and more variable sulfur content, and higher ash yield.

Hackley, P. C.; Martinez, M.

2007-01-01

 
 
 
 
221

Dewatering of planned Key Lake open pits in northern Saskatchewan  

International Nuclear Information System (INIS)

The engineering design and experience gained so far with a dewatering system for an open-pit uranium mine planned at Key Lake in Northern Saskatchewan are presented. An extensive unconfined overburden aquifer is hydraulically connected with the underlying Athabasca Formation and basement rocks, both of relatively low hydraulic conductivity. The overburden aquifer is embedded in a bedrock trough, with the deepest depression between the planned pits. Hydrogeological data were used in a numerical dewatering model simulating groundwater flow at different stages of the pit development. Based on the model results, the enginering design had to provide for different pumping rates, varying between 1.0 and 0.21 m"3/sec. This problem was solved by using a double line pressure system. The design concept for the complete peripheral discharge system and the well design used for 26 dewatering wells are discussed. (auth)

1980-01-01

222

Open-pit production and control at Roessing  

International Nuclear Information System (INIS)

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

1984-04-09

223

Nasal mucociliary clearance in coal mine workers  

Energy Technology Data Exchange (ETDEWEB)

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

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

2004-06-01

224

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.

225

A new light for coal mines  

Energy Technology Data Exchange (ETDEWEB)

Recent moves by the Indian government look set to offer unrestricted entry into India for private coal players. The Coal and Mines Nationalisation Act will be amended to allow unrestricted entry to private players in exploration and production of coal. The move will be followed by winding up the regional officers of the coal controller of Coal India Limited (CIL) in order to give greater autonomy to its subsidiaries and prospective entrepreneurs. A centralized office will have the task of facilitating smooth functioning of new entrants, regulating distribution of coal and granting permission for opening and reopening mines and seams. CIL has already closed several sales offices. 1 photo.

Nadkarni, S.

2001-09-01

226

Coal Mine Methane in Russia [Russian Version  

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

2010-07-01

227

Respirable Coal Mine Dust Sample Processing.  

Science.gov (United States)

The Federal Coal Mine Health and Safety Act of 1969 established mandatory dust standards for coal mines. Regulatory requirements for complying with the provisions of the Act were prescribed in Title 30, Code of Federal Regulations, Parts 70 and 71, which ...

L. D. Raymond T. F. Tomb P. S. Parobeck

1987-01-01

228

Cook Colliery automates coal mining and haulage  

Energy Technology Data Exchange (ETDEWEB)

Cook Colliery in Queensland has adopted leading edge mining automation, using a continuous haulage system not previously used in coal mines. The new owner Caledon Resources Plc is using the linear mining method developed by the South African company Magatar Mining. The Magatar linear mining system offers continuous mining in parallel fenders, which substantially reduces tramming damage to the floor. The system revolves around a belt haulage system, the Flexiveyor, which is a series of cascading conveyor belts mounted on independently steerable wheels providing a permanent link between the continuous liner (CM) and the section conveyor belt which conveys coal out of the mining section. The system has the inherent capacity to bridge the gap between traditional bord and pillar mining and longwall mining by offering the opportunity of rapidly increasing CM production rates, while also reducing underground traffic. 1 photo.

NONE

2008-08-15

229

French jumbos for Indian coal mines  

Energy Technology Data Exchange (ETDEWEB)

French technology is being put to use in four coal mines in India: Amlabad, East Katras, Chora and Godavari Khani 10. In two of the mines the soutirage (sub-level caving) method as developed in the coal mines of Aquitaine in south west France is being introduced. The method involves the depillaring of the full thickness of the coal seam in successive slabs, retreating on level galleries and loading the won coal from these levels. The pillars are split using blasting; the blasting patterns are drilled with an Eimco-Secoma jumbo. 6 figs.

1989-03-01

230

Estimation of dynamics of technical-and-economic indices of the Korkinsk brown coal section  

International Nuclear Information System (INIS)

Dynamics of technical and economic indices of Korkinsk brown coal open pit was studied. It is pointed out that the average growth of the net cost of mining 1t of coal made up 1.8% a year, whereas the depth of the works in 35 years (1950-1985) increased by 5% annually. The conclusion is made that under relevant organizational conditions provided open mining of steeply dipping coal deposits is efficient at low depths. 3 figs

1995-02-01

231

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

232

New Hope Coal Australia: leaders in thin seam coal mining  

Energy Technology Data Exchange (ETDEWEB)

New Hope Corporation Ltd.'s coal activities in Queensland are conducted under the business name of New Hope Coal Australia and comprise open-cut mines in the West Moreton coal fields, 40 km west of Brisbane. The company gained an award for its reject co-disposal system and another for its organic overburden conditioning programme. Walloon coal from the Jeebropilly and New Oakleigh open-cut mines has characteristics which are making it increasingly popular as power plant fuel. The article describes operations at these mines and also at Swanbank and Acland. Other projects with which New Hope is involved are mentioned. 4 photos.

NONE

2001-03-01

233

Blair Athol. [Coal mine in Australia  

Energy Technology Data Exchange (ETDEWEB)

The opening of this mine, its developments and operations are discussed in this article. Blair Athol has one of the richest known deposits of good quality steaming coal in Australia, if not the world. The 30 m thickness of the mines main seam is almost legendary in coal mining circles. Furthermore there is little variation in the ash and sulphur content throughout the deposits and the longest haul road is only 3 km.

1984-03-26

234

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

235

Possibilities for optimizing underground coal mining operations  

Energy Technology Data Exchange (ETDEWEB)

Discusses design and development failures in Yugoslav coal mines. Bottlenecks in production of machinery and equipment, inadequate working methods, low productivity and profitability should be eliminated by reconstruction and optimization of all underground and surface mining facilities. The technological and economic parameters of mining enterprises were considered, and the following criteria are recommended for financial and economic analysis of individual coal mines: 1) Investment efficiency coefficient; 2) Integral revenue; 3) Comparative profitability coefficient; 4) Integral operating costs; 5) Integral index of profitability. The importance of reliable statistical information about the production process, operating costs, mining and geological conditions is stressed. 3 refs.

Dordevic, M.

1986-01-01

236

Characteristics of coal mine ventilation air flows  

Energy Technology Data Exchange (ETDEWEB)

Coal mine methane (CMM) is not only a greenhouse gas but also a wasted energy resource if not utilised. Underground coal mining is by far the most important source of fugitive methane emissions, and about to 70% of all coal mining related methane is emitted to the atmosphere through mine ventilation air. Therefore, research and development on mine methane mitigation and utilisation now focuses on methane emitted from underground coal mines, in particular ventilation air methane (VAM) capture and utilisation. It is possible that the characteristics of ventilation airflows, for example the variations in methane concentration and the presence of certain compounds, which have not been reported so far, could make some potential VAM mitigation and utilisation technologies unfeasible if they cannot cope with the characteristics of mine site ventilation air flows. Therefore, it is important to understand the characteristics of mine ventilation air flows. Moreover, dust, hydrogen sulphide, sulphur dioxide, and other possible compounds emitted through mine ventilation air into the atmosphere are also pollutants. Therefore, this paper presents mine-site experimental results on the characteristics of mine ventilation air flows, including methane concentration and its variations, dust loadings, particle size, mineral matter of the dust, and other compounds in the ventilation air flows. The paper also discusses possible correlations between ventilation air characteristics and underground mining activities.

Su, S.; Chen, H.W.; Teakle, P.; Xue, S. [CSIRO Exploration & Mining, Kenmore, Qld. (Australia)

2008-01-15

237

Pioneer Coal Limited's coal mine reclamation projects  

Energy Technology Data Exchange (ETDEWEB)

This presentation outlined the land reclamation efforts at former surface mining sites in Pictou County Nova Scotia, notably the Stellarton Pit Mine; the Drummond Mine in Westville; and the Thorburn Mine. In August 1994 Pioneer Coal limited submitted a request for mine rehabilitation. The environmental approval to proceed was granted in 1995 and industrial approval was granted in 1996. The presentation included maps indicating the locations of the 3 mining sites as well as numerous aerial views and photographs depicting the mine operations as well as the results of the reclamation efforts. figs.

White, P.; Mattie, M. [Pioneer Coal Limited, Antigonish, NS (Canada)

2008-07-01

238

The future for coal mining in Poland  

Energy Technology Data Exchange (ETDEWEB)

This paper outlines the current position of the Polish coal mining industry. It then considers the recent changes that have taken place in the UK coal mining industry, and the extent that these can be used as a `role model` for Poland. It concludes with a view on the culture change that is necessary if Poland is to achieve an economically viable coal industry, and the potential benefits of this to the nation as a whole. 3 figs.

Goode, A.; Stretton, A. [ETSU, Harwell (United Kingdom). Clean Energy Dept.

1997-07-01

239

Respirable coal mine dust sample processing  

Energy Technology Data Exchange (ETDEWEB)

The Federal Coal Mine Health and Safety Act of 1969 established mandatory dust standards for coal mines. Regulatory requirements for complying with the provisions of the Act were prescribed in Title 30, Code of Federal Regulations, Parts 70 and 71, which were published in the Federal Register on April 3, 1970, and March 28, 1972, respectively. These standard and sampling requirements of coal mine operators, along with a description of the laboratory which was established to process respirable coal mine dust samples collected in accordance with these requirements, were published in MESA Informational Report (MESA, the acronym for the Mining Enforcement and Safety Administration, was changed to MSHA, the acronym for the Mine Safety and Health Administration, in 1977). These standards and regulatory requirements continued under the Federal Mine Safety and Health Act of 1977 until November 1980, when major regulatory revisions were made in the operator's dust sampling program. This paper describes the changes in the respirable coal mine dust sampling program and the equipment and procedures used by MSHA to process respirable coal mine dust samples collected in accordance with regulatory requirements. 10 figs., 1 tab.

Raymond, L.D.; Tomb, T.F.; Parobeck, P.S.

1987-01-01

240

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, early commencement of closure planning is the best insurance for achieving surrender.

Beer, Abri

2010-01-01

 
 
 
 
241

Coal from Colombia  

Energy Technology Data Exchange (ETDEWEB)

This paper describes the development of the Cerrejon coal mine in Colombia. Part of the income from the high-quality coal exports will improve the living standards of the local inhabitants. Over 11,000 men and women mostly Colombian, are currently working on the Cerrejon project construction. There will be three major facilities; an open pit mine, a 90 mile railroad and a port exclusively dedicated to coal shipping. Critical factors affecting these constructions are the difficult supply and equipment logistics due to remoteness, the need to build a complete infrastructure at both locations and the large amount of training required.

1985-05-01

242

Long-term open-pit planning by ant colony optimization  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The problem of long-term planning of a hard rock open pit mine (discontinuous exploitation operation) is a large combinatorial problem which cannot be solved in a reasonable amount of time through mathematical programming models because of its large size. In this thesis, a new metaheuristic algorithm has been developed based on the Ant Colony Optimization (ACO) and its application in long-term scheduling of a two dimensional hypothetical block model has been analysed. ACO is inspired by the f...

Sattarvand, Javad

2009-01-01

243

Long-term open-pit planning by ant colony optimization  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The problem of long-term planning of a hard rock open pit mine (discontinuous exploitation operation) is a large combinatorial problem which cannot be solved in a reasonable amount of time through mathematical programming models because of its large size. In this thesis, a new metaheuristic algorithm has been developed based on the Ant Colony Optimization (ACO) and its application in long-term scheduling of a two dimensional hypothetical block model has been analysed. ACO is inspired by the f...

Sattarvand, Javad

2011-01-01

244

A method for mining coal seams  

Energy Technology Data Exchange (ETDEWEB)

The invention concerns the mining industry and may be used to mine coal seams of 1 to 5.5 meters and with a pitch angle of more than 6 degrees. The method for mining steep coal seams is well known; it includes driving a development working and working the seam in rows along the dip using a hydraulic giant unit. Well known also is the coal mining method which includes sinking sectional headings into banks along the rise of the seam by driving twin stoping and coal chute workings for each band along the dip of the seam in single stopes leaving pillars between the stopes and hydraulically cutting the stopes of the bands with chips from the stoping working inclined towards the coal chute working. However, these methods are characterized by a large volume of pulp entering the stoping working and insufficient conditions for ventilating the former.

Pakhtusov, Iu.G.; Kostovetskii, S.P.; Pakhtusov, G.A.; Semenikhin, A.Ia.

1982-01-01

245

Injury experience in coal mining, 1990  

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

1991-12-31

246

Injury experience in coal mining, 1988  

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 1988. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 23 tabs.

1989-01-01

247

Injury experience in coal mining, 1987  

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 1987. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 3 figs., 46 tabs.

1988-01-01

248

Injury experience in coal mining, 1986  

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 1986. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. 1 fig., 46 tabs.

1987-01-01

249

Injury experience in coal mining, 1990  

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

1991-01-01

250

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

251

Greenhouse gas emissions from Australian coal mining  

Energy Technology Data Exchange (ETDEWEB)

The latest estimates of greenhouse gas emissions from the mining of black coal in Australia are presented, along with indications of the uncertainties from each of the source categories. The major sources are considered to be energy consumption, fugitive emissions and particularly from open cut mines, waste coal oxidation; however the last of these is highly uncertain. The basis for emissions from waste coal oxidation is briefly detailed. Some of the mitigation options are outlined, and current practices reviewed, as well as obstacles that impede the implementation of mitigation techniques. The major room for improvement will be from reducing fugitive emissions from underground mines. 4 refs., 2 figs., 4 tabs.

Williams, D.J. [CSIRO Energy Technology, North Ryde, NSW (Australia)

1999-08-01

252

20 years of Brown Coal Mine ''Belchatow''  

International Nuclear Information System (INIS)

History of the biggest Polish brown coal mine ''Belchatow'' is described. The mine located in Central Poland sells yearly about 34-35 million tons of coal to ''Belchatow'' power plant which produces about 20% of electric energy in the country. The plans of the mine are connected with the exploitation of the new deposit ''Szczercow'' estimated on 750 million tons of coal and 2 new power units (=750 MW) in Belchatow power plant, which should be built in 1996-2002. 2 ills

1995-06-01

253

Environment-friendly coal mining technology  

Energy Technology Data Exchange (ETDEWEB)

Surface subsidence and the discharge of refuse, waste water and waste gas constitute the major impact of coal mining on the environment. To reduce the difficulty of bringing the polluted environment under control and the volume of work for the purpose, environment-friendly coal mining technology, which can reduce pollution of the ecological environment, should be actively developed and applied. This includes cutting down discharge of wastes; reducing surface subsidence; integrating stripping, coal extraction and dumping with biological rehabilitation; recovery of coalbed methane, underground coal gasification etc.

Wang, Y.; Zhang, X.; Zhou, D.

1997-04-01

254

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

255

Injury experience in coal mining, 1980  

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 1980. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injuried, nature of injury, occupation, and bituminous or anthracite coal. Correlative information on employment, worktime, and operating activity also is presented. For ease of correlation between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of the 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. Only data reported by operators are utilized in this report. The statistical measures for injury experience adopted by MSHA in 1978 compare closely with the measures used in the Office of Occupational Safety and Health Statistics, Bureau of Labor Statistics, US Department of Labor. Therefore, beginning with 1978 data the mining industry can be compared on a standard basis with other United States industries.

1981-01-01

256

Injury experience in coal mining, 1985  

Energy Technology Data Exchange (ETDEWEB)

This Mine Safety and Health Administration (MSHA) informational report reviews in details the occupational injury and illness experience of coal mining in the United States for 1985. 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. 3 figs., 46 tabs.

1987-01-01

257

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

258

Underground coal mining technology in SCCL  

Energy Technology Data Exchange (ETDEWEB)

A brief description of the underground coal mining technologies used by Singareni Collieries Co. Ltd. (SCCL) is given. This includes: mechanised bord and pillar method; mechanised longwall technology; blasting gallery method; and performance of BG panels. 4 figs., 6 tabs.

Reddy, R.M. [Singareni Collieries Company Limited, Kothagudem (India)

1997-12-31

259

Coal Mine Dust Respiratory Protective Devices.  

Science.gov (United States)

The report is on the current status of respirator usage and effectiveness in coal mining operations. Topics include field survey of possession and use of respirators, duration of use, job classification, training and maintenance, training programs, respir...

H. E. Harris

1974-01-01

260

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

 
 
 
 
261

Injury experience in coal mining, 1982  

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 1982. 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. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of the 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. Only data reported by the operators themselves are utilized in this report. 23 tabs.

1984-01-01

262

Liquidation of technological waste by mining method  

International Nuclear Information System (INIS)

The mining activities are unfavourably influencing the environment. On the other hand known that it is possible to fill-in the mine spaces by waste material of non-mining origin, the technological waste coming from other processing plants. At present time some examples can be found in the coal mines where the inert technological waste is put to the open pit spaces. It is believed that the new legislation will open new possibilities for elimination of some of technological waste by its depositing into abandoned parts of the mine areas. (author)

2002-02-01

263

75 FR 17511 - Coal Mine Dust Sampling Devices  

Science.gov (United States)

...30 CFR Parts 18, 74, and 75 Coal Mine Dust Sampling Devices; High-Voltage...Adminisration 30 CFR Part 74 RIN 1219-AB61 Coal Mine Dust Sampling Devices AGENCY: Mine...monitor miner exposure to respirable coal mine dust. The final rule updates...

2010-04-06

264

Dynamic programming with colour graphics smoothing for open-pit design on a personal computer  

Energy Technology Data Exchange (ETDEWEB)

Dynamic programming is a technique which has been used to design the optimum final surface mining pit limit. In using dynamic programming there is a trade-off: if the geometric constraints are specified too strictly, the pit limit will not be the optimum, but if they are specified more loosely, then the computed pit contours must be smoothed. The smoothing process has usually been manual and is time consuming. In this paper a colour graphics computer routine is presented. This not only facilitates the smoothing but also has the following benefits: open-pit limits can be designed interactively on a personal computer; pit designs that are closer to the economic optimum can be obtained; and the engineer can bring his or her own experience and intuition to bear on the final open-pit design.

Zhang Shenggui; Starfield, A.M.

1985-03-01

265

Development of the mining works in Troyanovo-1 coal mine  

Energy Technology Data Exchange (ETDEWEB)

The basic characteristics of the development of the mining operations at the Troyanovo-1 mine from their commencement to 1997 are presented. The average development rates and their geometric mean values have been calculated on the basis of the quantities of extracted coal and overburden. An analytical expression has been found for the time series of the rates of coal and overburden extraction for the studied period. It is a step function which describes the historical facts of the mine development and permits the prediction of the future development rates. The proved irregular development of the mining operations requires the choice of a proper strategy for the mine development under market economy conditions. 1 ref., 1 tab.

Konstantinov, G.; Hristov, S.; Markov, I.; Ivanova, V. [University of Mining and Geology, Sofia (Bulgaria)

1999-07-01

266

Characteristics of coal mine ventilation air flows.  

Science.gov (United States)

Coal mine methane (CMM) is not only a greenhouse gas but also a wasted energy resource if not utilised. Underground coal mining is by far the most important source of fugitive methane emissions, and approximately 70% of all coal mining related methane is emitted to the atmosphere through mine ventilation air. Therefore, research and development on mine methane mitigation and utilisation now focuses on methane emitted from underground coal mines, in particular ventilation air methane (VAM) capture and utilisation. To date, most work has focused on the oxidation of very low concentration methane. These processes may be classified based on their combustion kinetic mechanisms into thermal oxidation and catalytic oxidation. VAM mitigation/utilisation technologies are generally divided into two basic categories: ancillary uses and principal uses. However, it is possible that the characteristics of ventilation air flows, for example the variations in methane concentration and the presence of certain compounds, which have not been reported so far, could make some potential VAM mitigation and utilisation technologies unfeasible if they cannot cope with the characteristics of mine site ventilation air flows. Therefore, it is important to understand the characteristics of mine ventilation air flows. Moreover, dust, hydrogen sulphide, sulphur dioxide, and other possible compounds emitted through mine ventilation air into the atmosphere are also pollutants. Therefore, this paper presents mine-site experimental results on the characteristics of mine ventilation air flows, including methane concentration and its variations, dust loadings, particle size, mineral matter of the dust, and other compounds in the ventilation air flows. The paper also discusses possible correlations between ventilation air characteristics and underground mining activities. PMID:17239518

Su, Shi; Chen, Hongwei; Teakle, Philip; Xue, Sheng

2008-01-01

267

Determinants of Coal Mine Labor Productivity Change.  

Science.gov (United States)

Coal mine labor productivity (tons per miner-shift) has been falling yearly since 1970. The decline in labor productivity since 1970 has implications for the coal industry's labor demand, cost of production, and injuries and could hinder the ability of th...

J. G. Baker W. L. Stevenson

1979-01-01

268

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

269

Informationization of coal enterprises and digital mine  

Energy Technology Data Exchange (ETDEWEB)

The main problems which were found in current conditions and problems of informationization in coal enterprises in China were analysed. The paper clarified how to achieve informationization in coal mining and put forward a general configuration of informationization construction in which informationization in coal enterprises was divided into two parts: informationization of safety production and informationization of management. A platform of integrated management of informationization in coal enterprises was planned. Ultimately, it was considered that an overall integrated digital mine is the way to achieve the goal of informatonization in coal enterprises, which can promote the application of automation, digitalization, networking, informaitionization to intellectualization. At the same time, the competitiveness of enterprises can be improved entirely and a new type of coal industry can be supported by information technology. 8 refs., 4 figs.

Lu, Jian-jun; Wang, Xiao-lu; Ma, Li; Zhao, An-xin [Xi' an University of Science and Technology, Xi' an (China). School of Communication and Information Engineering

2008-09-15

270

2003 coal mine directory - United States and Canada  

Energy Technology Data Exchange (ETDEWEB)

The directory describes all US and Canadian coal mines and plants. It describes coal geology of the US coal fields. It includes an index of industry executors, index of companies, directory of coal preparation plants and industry statistics.

NONE

2004-01-01

271

2003 coal mine directory - United States and Canada  

Energy Technology Data Exchange (ETDEWEB)

The directory describes all US and Canadian coal mines and plants. It describes coal geology of the US coal fields. It includes an index of industry executors, index of companies, directory of coal preparation plants and industry statistics.

NONE

2003-07-01

272

Hydraulic coal mining - developments in New Zealand  

Energy Technology Data Exchange (ETDEWEB)

Hydraulic transport of coal has been used for many years on the West Coast of New Zealand to extract small blocks of steeply dipping coal. Recent development at Strongman 2 Mine has seen the use of high pressure monitors to cut coal and a corresponding increase in the scale of production. This paper provides a brief introduction to hydraulic mining, describes the present system used at Strongman 2 and discusses future potential development, giving details on hydraulic monitor extraction and productivity, human resources, health and safety issues, and the future of hydraulic extraction. 7 figs.

Duncan, G.J. [Solid Energy New Zealand Ltd., Greymouth (New Zealand)

1998-12-31

273

Mobile Robot in Coal Mine Disaster  

Directory of Open Access Journals (Sweden)

Full Text Available As one of the largest coal production and consumption countries in the world, many countries are having related accidents occurred frequently such as gas explosion, flood, breaking out of fire during the exploitation of coal mine. Hazardous Gas Detection Robot is required to detect various kind of gas in coal mines. Multiple data can be detected and calculated simultaneously, so the response is fast using the same reference value. The range of the measurement is wide and it can accurately detect the gas content.

S.TejaRam#1 , Smt. M. Nalinisri

2013-05-01

274

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

275

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

276

Coal Mining Safety Monitoring Using WSN  

Directory of Open Access Journals (Sweden)

Full Text Available The main purpose was to provide an implementable design scenario for underground coal mines using wireless sensor networks (WSNs. The main reason being that given the intricacies in the physical structure of a coal mine, only low power WSN nodes can produce accurate surveillance and accident detection data. The work mainly concentrated on designing and simulating various alternate scenarios for a typical mine and comparing them based on the obtained results to arrive at a final design. In the Era of embedded technology, the Zigbee protocols are used in more and more applications. Because of the rapid development of sensors, microcontrollers, and network technology, a reliable technological condition has been provided for our automatic real-time monitoring of coal mine. The underground system collects temperature, humidity and methane values of coal mine through sensor nodes in the mine; it also collects the number of personnel inside the mine with the help of an IR sensor, and then transmits the data to information processing terminal based on ARM.

Ashish Kumar, Kriti Singh, Dr. Debmalya Bhattacharya

2013-10-01

277

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

278

????????????????? 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.

???

2011-09-01

279

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

280

77 FR 42505 - Notice of Intent To Prepare an Environmental Impact Statement for the Proposed Long Canyon Mine...  

Science.gov (United States)

...SUPPLEMENTARY INFORMATION: Newmont Mining Corporation (Newmont) proposes to construct and operate an open-pit gold mining operation, which would include one open pit, a heap leach pad, one waste rock dump, a tailings storage facility,...

2012-07-19

 
 
 
 
281

The measures on preventing the pollution of Lake Baikal by mine water  

Energy Technology Data Exchange (ETDEWEB)

Presentation is made of the data concerning the flow and qualitative composition of mine water of the Vostsibugol' Company plants, which drain their waste waters into Lake Baikal. The bodies of water attached to the Lake Baikal system currently receive, and will continue to do so in the near future, waste water from four coal mining enterprises, of which only one enterprise (the Gusinoozersk mine) has an excess of established control equipment for the tolerable control of suspended substances. The VNIIOSugol' Institute has developed a technical proposal for the reconstruction of effective purification equipment for mine water in the Gusinoozersk mine. A technological scheme for cleaning open pit waters of the planned Tufnuisk open pit is presented. The realization of these developments will make it possible, in the near future, to eliminate completely the harmful effect of the disposal of waste water from the coal industry plants into Lake Baikal.

Komkov, D.I.; Kharionovskii, A.A.; Vasev, V.A.

1980-01-01

282

Bureau of Mines Procedure for Evaluating Quartz Content of Respirable Coal Mine Dust.  

Science.gov (United States)

The Federal Coal Mine Health and Safety Act of 1969 delegated to the Bureau of Mines a yearly program of health inspections. Respirable coal mine dust concentrations are measured by Bureau inspectors. Samples of respirable coal mine dust are weighed to de...

M. Jacobson S. A. Goldberg

1972-01-01

283

Characterization of coal samples from Dasal-i coal mine  

International Nuclear Information System (INIS)

Summary: Characterization of coal from Dasal coal mine Khyber pukatunkwa, Pakistan. Coal samples were collected from 50, 100, 150, 175, 200 and 250 feet. Coal samples were crushed, grounded and screened through 250 macro m sieves shaker. Proximate and ultimate analysis of coal showed that these coals were of low grade from sub-bituminous to bituminous. Sulphur content from Dasal coal mine was less as compared with other mines in Pakistan. Leaching of coal led to significant amount of mineral matter with hydrochloric acid (HCl), ammonium acetate (CH/sub 3/ COONH/sub 4/ ), nitric acid (HNO/sub 3/), hydrofluoric acid (HF), sodium hydroxide (NaOH). Among the leachants HCl was most effective for copper, iron, chromium and cobalt. In case of CH/sub 3/ COONH/sub 4/ no significant leaching was made. HNO/sub 3/ and NaOH also resulted average leaching while, HF was found to be a good leachant for lead, nickel and zinc. Most of inorganic elements were effectively leached by digestion as compared to other leachants. (author)

2012-01-01

284

Injury experience in coal mining, 1979  

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 1979. 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 bituminous or anthracite coal. Correlative information on employment, worktime, and operating activity also is presented. For ease of correlation between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included. Data 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. The statistical measures for injury experience adopted by MSHA in 1978 compare closely with the measures used in the Office of Occupational Safety and Health Statistics, Bureau of Labor Statistics, US Department of Labor. Therefore, beginning with 1978 data the mining industry can be compared on a standard basis with other United States industries. The statistical data the work experience of all personnel engaged in exploration development, production, maintenance, repair, and construction work, including supervisory and technical personnel, working partners, and onsite officeworkers. The terminology used throughout this report is that generally used by the mineral-extractive industries and by MSHA.

1980-01-01

285

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

286

Selection and analysis of mining equipment for selective coal mining in the Juzna Sinklinala and Sikulje surface coal mines  

Energy Technology Data Exchange (ETDEWEB)

Describes the procedure of mining equipment selection for selective coal mines, using the Juzna Sinklinala and Sikulje lignite surface mines as examples. In continuous coal mining by means of selective coal cutting technology, bucket wheel excavators are used for coal cutting and removal of overburden and waste intercalations. Shovel excavators and bulldozers are used for auxiliary working operations. The main problem in evaluating the use of continually operating mine equipment is in determining the amount of time the equipment spends in productive work on coal seams and in unproductive work on waste material. A computer assisted method of solving this problem is briefly described. The description involves 18 steps of an algorithm. 4 refs.

Jakovac, M.; Hadziavdic, D.; Sajkiewicz, J.; Dzindic, M.; Zivkovic, S.

1986-01-01

287

???????????????? Research on Working Mechanism of Coal Mine Safety Production  

Digital Repository Infrastructure Vision for European Research (DRIVER)

??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? The benefit orientation, responsibility sharing, safety culture and administration system are the key issues of coal mine safety produc...

???; ???

2012-01-01

288

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

289

Indonesian and Malaysian coal contract mining  

Energy Technology Data Exchange (ETDEWEB)

Descriptions are given of contract opencast coal mining in deposits in Indonesia and Malaysia. The Indonesian deposits date from the Tertiary and are on Kalimantan. At the Kalimantan mines equipment has proved a problem as plant that can cope well at mines in Australia or New Zealand breaks down through overheating in tropical Indonesia. The Komatsu equipment now in use has an availability of 95%. Heavy use has been required of the equipment as the Indonesian government limits the impact of explosives, particularly since the overburden includes hard sandstones. These projects are only economically viable because of the high quality of the coal. Coals of the same age range are also worked in Sarawak, Malaysia at a geographically remote site. 3 figs.

NONE

1996-05-01

290

Coal mine helps endangered wallaby survive  

Energy Technology Data Exchange (ETDEWEB)

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

NONE

1999-02-01

291

Crisis management in coal mining: A study in tragedy  

Energy Technology Data Exchange (ETDEWEB)

The first two installments of this article, published in Coal Mining 12/87 and Coal 2/88, reviewed crisis management techniques and objectives. This part of the article uses these techniques and hindsight to help analyze a real crisis in coal mining: the Wilberg mine fire which killed 27 miners in December 1984.

Britton, S.G.

1988-03-01

292

Coal mine roof and rib control  

Energy Technology Data Exchange (ETDEWEB)

This manual describes why roofs and ribs of mines sometimes fail, what measures are taken to prevent roofs and ribs from falling, and what can be done to prevent injury or death from this ever-present danger. The emphasis is placed on underground coal mining techniques and equipment used in this type of operation. A comparison of different types of roof bolts and timbers is also included.

1980-01-01

293

Blasting hazard awareness: Surface coal mines (revised)  

Energy Technology Data Exchange (ETDEWEB)

This program is a collection of materials designed for use by trainers in the surface coal mine industry to supplement their own training programs for supervisory and nonsupervisory personnel. The package emphasizes safe work practices in the belief that comprehensive task training, hazard recognition, and clear, concise communication among all at the mine site - blasters and non-blasters alike - are essential for safe blasting.

NONE

1996-12-01

294

Blasting hazard awareness: Underground coal mines (revised)  

Energy Technology Data Exchange (ETDEWEB)

This program is a collection of materials designed for use by trainers in the underground coal mining industry to supplement their own training programs for supervisory and nonsupervisory personnel. The package emphasizes safe work practices in the belief that comprehensive task training, hazard recognition, and clear, concise communication among all at the mine site - blasters and non-blasters alike - are essential for safe blasting.

NONE

1996-12-01

295

Geological exploration for underground coal mines  

Energy Technology Data Exchange (ETDEWEB)

This paper describes the geological exploration techniques used for a greenfields exploration programme. The subject is developed to investigate the techniques that are available and the research that is needed to further the understanding of a mine's geological environment. Aspects covered include: stages of exploration; parameters to be examined (e.g. coal quality and characteristics, geotechnical and mining characteristics and structure and sedimentology); cost and effectiveness; and possible future improvements in exploration methods. 1 fig.

Phillips, R.; Hanes, J. (Capricorn Coal Management Pty, Ltd. (Australia))

1992-01-01

296

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

297

Coal mine ground control. 3rd ed.  

Energy Technology Data Exchange (ETDEWEB)

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

Peng, S.S.

2008-09-15

298

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

299

Exposure of workers in Tusnica coal mine  

International Nuclear Information System (INIS)

The aim of this paper is to identify potential exposure of the workers in the coal mine Tusnica. The results of the investigation showed increased activity of brown coal up to 1060±88 Bq kg-1 for 238U, 976±30 Bq kg-1 for 226Ra and 118±31 Bq kg-1 for 232Th. Dose rate measurements ranged from 0.07 to 0.25 ?Sv h-1. The annual effective dose, taking into account external exposure to ambient gamma radiation and internal exposure due to inhalation of the resuspended dust, would be 1.6 mSv a-1. The results presented lead to the conclusion that Tusnica coal mine contains brown coal with significant radioactivity, indicating that the working hours in the area should be regulated and the use of respiratory protective equipment is obligatory. (authors)

2010-03-08

300

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

 
 
 
 
301

Solving the problem of manless coal mining  

Energy Technology Data Exchange (ETDEWEB)

Suggests that scraper plows are the most efficient method of automated mining of inclined, thin, coal seams, when coal resistance to cutting is not higher than 250 kgs/cm. Methods of mining thin coal seams in the Donetsk (enterprises: Donetskugol', Makeevugol', Stakhanovugol' and Rostovugol') are analyzed along with the percentage of coal mined by means of US-2u scraper plows. In 1978 35.7% of coal in seams 0.45 to 0.55 m thick was mined by scraper plows, in seams 0.56 m to 0.65 m thick 57.7%, and 6.6% in seams over 0.65 m thick. Maximum length of the scraper plow face is 220 m, maximum length of pillars (in room and pillar systems) is 500 m, but as assembling and disassembling of scraper plows is relatively easy, 67% of longwall faces were not longer than 300 m. Among the schemes of preparatory work of scraper plow faces three methods prevail: so-called level scheme 64.4%, panel scheme 27.6% and horizontal scheme 8%. Angle of inclination of the seams prepared by the level or panel scheme ranges from 3 degress to 25 degrees, and by the horizontal scheme from 3 degrees to 5 degrees. (In Russian)

Obykhov, A.A.; Popov, S.M.

1980-04-01

302

Research Status on Control System of Coal Mine Rescue Robot  

Directory of Open Access Journals (Sweden)

Full Text Available The coal mine rescue robot is the device which replaces the rescue workers to detect the environment and rescue victims in mine. And the control system is the core of the coal mine rescue robot and decides the performance of the robot. To design the control system which meets the requirement of coal mine rescue, it is firstly analyzed that requirements of the coal mine rescue robot in this study. Then, it is recommended that the control systems of coal mine robots which have been developed in China and its advantages and disadvantages are analyzed. In the end, we suggest an open control system based on ether net which meets the requirements of the coal mine rescue robot. The outdoor test shows that this control system effective and reliability for coal mine rescue robot.

Liu Jian

2013-01-01

303

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)

2005-11-16

304

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

305

Need for Clean Coal Mining in India  

Directory of Open Access Journals (Sweden)

Full Text Available Coal mining contributes largely towards economic development of the nation although it has a great impact on the human health. It also has an impact on a socio-cultural aspect of workers and people residing in and around coal mining areas. Thus a holistic approach to taking up with mining activities, keeping in mind the concerns over adjoining habitats and ecosystem, is the need of the hour. This requires identification of various sites where minerals exist, of various factors ranging from an appropriate angle of the slope of overburden dumps to safe disposal drains, of safe techniques to various silt control structures etc. In India, coal companies are now working towards “clean coal” strategies which aim to reduce environmental impacts. The reduced ash contents of the washed coal increase thermal efficiency of combustion which, in turn, makes a direct impact on reducing emissions of pollutants. However, the coal washing requires extra water and it can turn towards a pollution free society.DOI: http://dx.doi.org/10.5755/j01.erem.66.4.4870

Sribas Goswami

2014-01-01

306

Faults and Their Effect on Coal Mining in Illinois.  

Science.gov (United States)

Faults are one of many types of geologic disturbances that affect coal seams. They are common in coal seams of Illinois and have considerable effects on coal mining, such as: offsetting of the coal seams, creation of grades too steep for mining equipment ...

W. J. Nelson

1981-01-01

307

Convicts, coal and the Banner mine tragedy  

Energy Technology Data Exchange (ETDEWEB)

In 1911 there was an explosion in a coal mine in Jefferson county, Alabama in which 128 died. Most were convicts who had been leased by the State to the mine owners. The authors have taken the event as the focal point for an account of some of the aspects of the social and political situation in Alabama in the early part of this century. The topics of convict leasing and mine safety receive most attention. The book has seven chapters, each with full notes on the sources which are mainly contemporary newspaper reports.

Ward, R.D.; Rogers, W.W.

1987-01-01

308

Underground coal mine power systems  

Energy Technology Data Exchange (ETDEWEB)

An overview is presented of mine electrical power systems research currently being conducted by the US Bureau of Mines. Papers are included that summarize results of research in the areas of electrical shock prevention, explosion-proof enclosures and load centers, discriminating circuit breakers, and trailing cables.

1982-01-01

309

Competitiveness in the coal mining industry  

Energy Technology Data Exchange (ETDEWEB)

For the last decade Australia has been the leading exporter of both steam and coking coal. In the ten-year period 1989-1998 steam coal exports increased by 93% and metallurgical coal exports increased by 50%. However, profitability of the steam coal sector has been disappointing. The coking coal sector, especially the hard coking coal segment, has fared better but its profitability was more because of its ability to maintain relatively high prices rather than its inherent productivity. But coking coal could now be heading down the path followed by steam coal that ends with long-term over-supply and, despite steady improvements in productivity, poor profitability. The paper analyses past and expected future trends in labour and mine productivity, rail freight and FOB export port cash and total costs of the Australian steam coal and coking coal sectors and discusses the market outlook for Australia. The future economic viability of the industry is analysed and discussed in the light of the rapidly changing global environment. 5 refs., 13 figs.

Barnett, D.W.

2000-07-01

310

78 FR 25308 - Proposed Collection; Comment Request; Coal Mine Dust Sampling Devices  

Science.gov (United States)

...Proposed Collection; Comment Request; Coal Mine Dust Sampling Devices AGENCY: Mine...information collection related to Coal Mine Dust Sampling Devices. MSHA is particularly...and Health Administration. Title: Coal Mine Dust Sampling Devices. OMB...

2013-04-30

311

77 FR 38323 - Proposed Extension of Existing Information Collection; Respirable Coal Mine Dust Sampling  

Science.gov (United States)

...Information Collection; Respirable Coal Mine Dust Sampling AGENCY: Mine Safety...Dust Data Card'' to ``Respirable Coal Mine Dust Sampling'' to more accurately...Chronic exposure to respirable coal mine dust causes lung diseases...

2012-06-27

312

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 taking agricultural land, so that surface mines, which affect large areas in Kolubara, about 100 hectars a year, causing a number of problems related to the recultivation of degraded area after coal...

Ristovic?, Ivica M.; Milan Stojakovi?; Milivoj Vuli?

2010-01-01

313

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

314

Geologic Conditions Affecting Coal Mine Ground Control in the Western United States.  

Science.gov (United States)

A comprehensive investigation was conducted into geologic features affecting coal mine ground control in western underground coal mines. The study involved a literature search for data on geologic features affecting coal mine ground control, western coal ...

R. B. Laird A. L. Amundson G. J. Colaizzi L. M. Bithell

1985-01-01

315

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

316

TREATMENT CATEGORIES FOR COAL MINE DRAINAGE  

Science.gov (United States)

This effort involved the organization and statistical analysis of a large amount of data characterizing over 300 surface and underground coal mines and quantification of the pre- and post-treatment quality of their wastewaters. Only existing data, supplied to Hittman Associates b...

317

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

318

Development of technology and equipment for underground coal mining in leading coal mining countries  

Energy Technology Data Exchange (ETDEWEB)

The development of equipment for underground coal mining in the Federal Republic of Germany, the United Kingdom, the USA and some other countries is discussed. The following equipment types are comparatively evaluated: shield supports for thin coal seams and for thick coal seams (design, yield strength), shield supports used in slice mining of thick seams, shearer loaders for mining thick seams, coal plows for thin coal seams, chainless haulage systems for shearer loaders (their reliability and effects on safety at working faces), chain conveyors for mine haulage at working faces, heading machines for mine drivage (use of combined methods for rock cutting using high pressure water jets and cutting), support systems for mine drivage (use of roof bolts, wire nets and gunite), use of full-face drilling, systems for shaft excavation by drilling (drilling a pilot borehole and reaming). Prospects are evaluated for automation of underground mining and automation trends: use of automatic control systems for advancing powered supports, automatic control of shearer loader operation, automatic control of heading machines.

Krashkin, I.S.; Shumkov, S.I.

1984-11-01

319

Management present situation and countermeasures of coal mines safety in production  

Energy Technology Data Exchange (ETDEWEB)

The paper analyzed the present situation of Chinese coal mines safety in production and the reasons for coal mining accident, and realized the coal mines safety in production, which should increase the legal safeguards of coal mine safety in production, and safety input, established the comprehensive coal mine safety evaluation system, comprehensively enhance quality of coal mine workers, established and improved early warning mechanism of safety production of coal mine. 5 refs.

Zhang, Shu-dong; Yu, Chang-wu [Liaoning Technical University, Fuxin (China). College of Resource and Environmental Engineering

2008-06-15

320

Cross-pit conveyor and end-around-conveyor continuous mining systems. [Coal mine  

Energy Technology Data Exchange (ETDEWEB)

These systems will perform prebenching for draglines and shovels, reclamation of spoils without soil compaction, mining of surface coal seams that are beyond the normal dragline range, mining of multiple thin coal seams and cost efficient haulage. In addition to coal mining, these systems can be used in tar sands, phosphate, or other applications where large volumes of material must be moved.

Barden, K.L.; Files, T.I.; Gilewicz, P.J.

1981-09-01

 
 
 
 
321

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

322

Dust protective helmet for coal mines  

Energy Technology Data Exchange (ETDEWEB)

Mitui Mining Co., Ltd. Miike Coal Mine, endeavor to mechanize drilling works, particularly dust control measure is also requested to be considered because of mechanization for rock drilling. Dust is the important problem for safety and sanitary of workers, and restraint and removal of dust, prevention against inhalation dust are three principles for control measure. About prevention against inhalation dust, dust mask was only one counter measure currently in use, however helmet which is capable to prevent against inhalation dust was adopted and field adaptive test was conducted. The adopted dust protective helmet was known as AIRSTREAM, manufactured by Racal, UK, and composed of helmet, electric fan, filter and visor. Field adaptive test was conducted at coal mining and drilling faces, however because of resistance unfamiliar to worker's body, this helmet is planned to be firmly accustomed to practical use by continuing the test. 3 figs.

1989-03-25

323

Aspects of operational mine safety assurance at the 4 south mine, Quinsam coal mining operation  

Energy Technology Data Exchange (ETDEWEB)

Mine safety management strategies at the Quinsam coal mine were discussed. The Quinsam mine is located 25 km from the Campbell River in Alberta. The mine has won several safety awards. A checkerboard de-pillaring design was used at the mine, which is also currently applying for a bulk sample permit. Some of the mine's seams are prone to spontaneous combustion and hard cutting coal. Accidents have tended to occur at extended cuts in structurally complex coal deposits. Structural mapping is used to identify and assess structural data as well as to develop ground support plans. Structural visualization and wedge stability analyses are also used. Customized training is provided to ensure that mining personnel are knowledgeable about rock mechanics, mine planning, depillaring practices, and ground support. On-site specialized ground training sessions are also provided. It was concluded that the variability of mining environments must be understood in order to make mines safer. Details of the mine's employees were provided, including details of the average age of employees, average hours worked, and their work experience. tabs., figs.

Krivokuca, P. [Hillsborough Resources Ltd., Vancouver, BC (Canada)]|[Quinsam Coal Corp., Campbell River, BC (Canada); DuBois, C.J. [Quinsam Coal Corp., Campbell River, BC (Canada)

2008-07-01

324

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

325

Coal mining without the presence of workers at the face  

Energy Technology Data Exchange (ETDEWEB)

High percentage of coal in the Kuzbass is mined in steep coal seams. Conventional methods of mining steep, thin coal seams, such as blast hole drilling, are characterized by low efficiency and a high rate of work accidents. Mining thin seams cannot, however, be restricted even under such conditions as in many cases mining thin coal seams reduces methane hazard and burst hazard in adjacent thick coal seams. A method of mining thin coal seams by means of the 'Temp' coal cutter without the presence of miners is evaluated. The 'Temp' combine is used to mine a seam 0.90 m to 1.1 m thick, inclined at an angle from 68 to 70 degrees. Coefficient of coal resistance to cutting ranges from 1.0 to 1.2. A scheme of ventilation tunnels, coal haulage roadways, and the coal face is shown. The face is mined by the remote controlled combine. The control panel is located in the ventilation tunnel above the inclined coal face. Coal output from a face mined by the 'Temp' coal cutter amounts to 400 to 450 t per day. In comparison to blast hole drilling consumption of wooden props was reduced 10.8 times and work productivity of the miners at the face increased 2.6 times.

Shirokov, A.P.; Rodionov, S.I.; Shadrin, A.G.

1980-10-01

326

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

327

Integration of mine and power station as a tool for crisis management of coal mining industry  

Energy Technology Data Exchange (ETDEWEB)

To solve the deep crisis situation of coal mining in Hungary, organization integration has been decided to take place between several coal mine companies and electric power utilities. In this respect, the integration between the Matra Power Station Co., and the Matraaljai Coal Mines Co., between the Pecs Power Station Co., and the Mecsek Coal Mines Co., and between the Bakony Power Station Co., and the Veszprem Coal Mines Co., took place last year. The evaluation and preliminary results of these integration processes are presented.

Hollo, V.

1993-04-01

328

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

2013-08-01

329

Utilization of complexes for fully mechanized coal mining in Bulgarian underground coal mines  

Energy Technology Data Exchange (ETDEWEB)

This paper reports about the utilization of equipment for fully mechanized longwall mining in Bulgarian underground mines. In the period of 1965-1979 48 complexes for fully mechanized longwall mining were purchased from the USSR. The equipment was used in Marbas, Dimitrov, Bobov Dol and Balkan coal mines in 1.15-3.0 m thick coal seams on 50-110 m long longwalls. The average production of longwalls varied from 660-1,336 t/day. These results are regarded as insufficient compared with the production which has been obtained with the same equipment in the USSR (1,500-2,000 t/day). Difficult working conditions and very low (20%) index of utilization of shearer loaders are given as causes of this difference. Information is given on longwall mining and equipment employed. (5 refs.) (In Bulgarian)

Markov, L.; Koleva, M.; Khristov, Kh.

1982-03-01

330

Mining of thin coal seams  

Energy Technology Data Exchange (ETDEWEB)

At a South African mine, cutting heights down to 900 mm will be necessary. Gullick Dawson and Dobson Ltd., are supplying special chocks which are 650 mm high when closed, and up to 1140 mm when open. The chocks have a resistance of 100 t/m$SUP$2 when they are 1.3 m apart.

1981-06-01

331

Environmental damage and countermeasures in Chinese coal mine areas  

International Nuclear Information System (INIS)

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

1998-05-17

332

Hydraulic drilling of inclined boreholes for manless coal mining. [USSR  

Energy Technology Data Exchange (ETDEWEB)

The paper evaluates systems for hydraulic mining of inclined and steep, thin coal seams in the USSR. Optimizing hydraulic manless mining is analyzed. Equations for determining the optimum water pressure and distance from water jets to a coal face, as well as the optimum dimensions of rooms and pillars are derived. Nomograms for easy calculation of the optimum parameters for hydraulic mining are given. The process of coal destruction by a water jet in a borehole is analyzed. Recommendations on the optimum systems of room and pillar mining using hydraulic giants are made. Economic effects of using optimum mining schemes in Donbass and Kuzbass mines are given.

Luk' yanchenko, E.S.

1982-10-01

333

Megalopolis open-pit field. [Greece  

Energy Technology Data Exchange (ETDEWEB)

Apart from hydroelectric power, brown coal is the only important primary energy source in Greece. The importance of the Megalopolis coal field has been recognized in 1957 when exploratory drillings were made on behalf of the Public Power Corporation of Greece (PPC). To cover the Greece energy demand, which was strongly increasing at the time, another thermal power plant has been planned in this region in addition to the Ptolemais field (Northern Greece) and Aliven (Euboria).

Goergen, H.

1982-04-01

334

Coal Mine Health and Safety Regulation 2006 under the Coal Mine Health and Safety Act 2002  

Energy Technology Data Exchange (ETDEWEB)

The aim of the Act is to secure the health, safety and welfare of people in connection with coal operations (which include all places of work where coal is mined and certain other places). The Regulation contains provisions about the following matters: (a) places of work to which the Act does not apply, (b) duties relating to health, welfare and safety at coal operations, including the following: (i) the nomination of the operator of a coal operation and the provision of health and safety information for incoming operators, (ii) the contents of health and safety management systems for coal operations, (iii) major hazards and the contents of major hazard management plans for coal operations, (iv) duties relating to contractors, (v) the contents of management structures and emergency management systems for coal operations, escape and rescue plans and fire fighting plans and high risk activities, (c) notifications, including (i) notification of incidents, (ii) inquiries, (iii) notification of other matters to the Chief Inspector), (d) aspects of safety at coal operations, including the following: (i) controlled materials, plants and practices, (ii) coal dust explosion prevention and suppression, (iii) ventilation at coal operations, (iv) escape from coal operations, (v) the operation of transport at coal operations, (vi) surveys and certified plans, (vii) employment at coal operations, (e) the licensing of certain activities, (f) competence standards, (g) the Coal Competence Board, (h) check inspectors, (i) exemptions from provisions of this Regulation, (j) the following miscellaneous matters concerning coal mine health and safety: (i) the keeping of records and reporting, (ii) penalties, the review of decisions by the Administrative Decisions Tribunal, fees and charges, consultation, information and other miscellaneous matters, (k) savings and transitional provisions.

NONE

2006-12-22

335

ESTIMATE OF GLOBAL METHANE EMISSIONS FROM COAL MINES  

Science.gov (United States)

Country-specific emissions of methane (CH4) from underground coal mines, surface coal mines, and coal crushing and transport operations are estimated for 1989. Emissions for individual countries are estimated by using two sets of regression equations (R2 values range from 0.56 to...

336

Treatment of acid mine lakes  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Mining of lignite in Lusatia has a long history of over 100 years. The extracted brown coal is utilized to generate electricity in three large power plants: Jänschwalde, Boxberg, and Schwarze Pumpe. With an annual carbon dioxide (CO2) output of approximately 50 million tons, these power plants are among Germany’s large-scale CO2 emitters. The environmental impact from open-pit mining is of a considerable degree and currently poses a challenging problem. The groundwater deficit in 1990 w...

Schipek, Mandy

2012-01-01

337

Dust standards and pneumoconiosis. [Coal mining  

Energy Technology Data Exchange (ETDEWEB)

The introduction of joint coal production machines has greatly increased the level of dustiness in coal mines which has been established as the sole source of miners' occupational lung disease, better known as Pneumoconiosis. Both the coal industries and governments have made extensive investments in an effort to minimize the associated human suffering by complying with prescribed dust standards due to developments made in dust control. The minus 5 microns, and in particular the minus 3 microns coal dust particles are the most dangerous. Medical evidence has suggested a close correlation between the degree of disease contracted and the mass of coal dust accumulated in the lungs. Respirable dust suppression efficiency of the order of over 90% has been obtained in coalface areas which have permitted the mines to comply with mandatory dust standards. However technology available is better able to control large size respirable particles while new technology such as electrostatic precipitators needs to be developed for effective control of the ultra fines. (8 refs.)

Sinha, A.K.; Fadiya, A.O.B.

1985-04-01

338

Crisis management for coal mining  

Energy Technology Data Exchange (ETDEWEB)

Acknowledging risks and attempting to influence their impact is the basis of crisis management. A formal program of improving the crisis management skills of an organisation is very important for the depressed coal markets. These skills include recognizing, measuring, handling and resolving any of the crisis situations an organisation will face during the course of business. 1 ref., 4 figs.

Britton, S.G.

1987-12-01

339

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

340

Old coal mine workings - impact on environment  

Energy Technology Data Exchange (ETDEWEB)

The impact of abandoned unapproachable old coal mine workings on settlements and the environment is examined with respect to Raniganj Coalfield (RCF). In this region, many densely populated townships have grown up over unknown and dangerous, or suspected, old underground workings which could collapse without warning and cause untold damage to dwellings and surface structures. Two measures are suggested for dealing with the problem, namely, stabilising the old workings and relieving the pressure of population over the coal bearing areas. A programme to put these measures into practice would require a sustained data collection effort and the initiation of extensive research.

Ghosh, H.B.

1993-01-01

 
 
 
 
341

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

Digital Repository Infrastructure Vision for European Research (DRIVER)

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...

Meng, Zhao-jian

2013-01-01

342

Rio Blanco pursues MIS tests as well as open-pit studies. [Modified in-situ  

Energy Technology Data Exchange (ETDEWEB)

The approach to development by Rio Blanco Oil Shale Co. has followed an ambivalent pattern, centering first on a surface mining plan and more recently on its own version of MIS (modified in situ) recovery of shale oil. Development crews ignited the first experimental MIS retort, a small, 30 x 30 x 166-ft-high, rubbled volume, in mid-Oct. 1980. Fracturing of oil shale for a second retort (R1, measuring 60 x 60 x 400 ft high) took place to start construction of 4400 short tons/day Lurgi-Ruhrgas (L-R) oil shale retorting module later this year. The L-R retort is expected to be capable of recovering approximately 2000 bpd of shale oil from oil from the feed. A potential open-pit mining area is mapped, schematics show open-pit development and an idealized MIS retort, and diagrams illustrate idealized product flow for MIS retorting and a simplified flow diagram for the L-R retorting system.

1981-06-01

343

Fully mechanized longwall top coal caving technology used in chinese coal mines  

Energy Technology Data Exchange (ETDEWEB)

At the beginning of the 80s, commercial tests of top coal caving method were made in Puhe Mine of Shenyang Coal Mine Administration and in No. 2 Mine of Yaojie Coal Mine Administration in China with domestic installation in order to achieve mechanized mining in gently inclined unstable thick coal seams and in steep and ultra-thick coal seams based on experience obtained abroad. After the success of trials, this technique was introduced to some mine areas, like Yangquan, Luan, Jincheng, Xuangang and Yanzhou areas with relatively stable coal seams. As a result, the mechanized slicing mining method was replaced by fully mechanized top coal caving method. A monthly record of 140,000 tons of coal output was set up by Yangquan No. 1 Mine in 1991. After that, the best monthly and yearly production records were broken one after another with constant renewal of face installations. In 1993, Wangzhuand Mine, Luan set up a best 310,000 tons of coal output and a yearly record of 2.53 million tons of coal output. A full mechanized top coal caving method ws well established in the course of more than ten years of research and practice in China. It has become one of the most effective methods in mining thick methods in mining thick coal seams with high production and high efficiency in China. (translated by NEDO)

Jianzhang, Lu

1999-09-01

344

Smoother and more effective each day. [Polish underground coal mining  

Energy Technology Data Exchange (ETDEWEB)

The Vice Minister of Mining and Power Generation, Marian Gustlik, is interviewed on problems of underground coal mining in Poland. From January to March 1985 coal output reached 47.9 Mt, daily coal output increased to 634,000 t/d, coal output per miner increased by 12 kg and reached 2044 kg. Investment in underground coal mining in 1984 increased to 65,200 million zlotys and exceeded planned investment by 11.4%. In 1985 investment should reach 68,500 million zlotys, of which about 20,000 million zlotys will be spent on construction of new coal mines. The Czeczott mine should start operation in 1985, and the Kaczyce mine should start operation in 1986. Investment in the Budryk, the K-2 and the Warszowice area of the XXX-Lecia PRL mine is restricted to the minimum. Occupational safety in underground mining has decreased. The number of fatal accidents has increased. New mining equipment which will be manufactured on commercial scale in 1985 is discussed: the KGS-150, KGS-160 and KGS-190 shearer loaders with trackless haulage systems for thin coal seams, the KGS-320 and the KGS-560 shearer loaders with trackless haulage systems for medium coal seams, the Glinik powered supports for thin coal seams, the Rybnik-71 chain conveyors for thin seams, and support systems for longwall mining with caving and stowing and for junctions of working faces with gate roads.

Janik, J.

1985-04-01

345

Investigation of the long-term behaviour of residues of brown coal upgrading processes in an underground deposit in the geogenic conditions of potassium and rock salt mining. Text volume. Final report  

International Nuclear Information System (INIS)

Residues of brown coal upgrading processes are problematic substances that require extensive monitoring. In East Germany, these residues were usually stored above ground in abandoned open pits and industrial waste dumps. In the Land of Thuringia, the most urgent poblems are posed by the ''Neue Sorge'' abandoned open pit near Rositz and the Rusendorf industrial waste dump. In both cases, large volumes of highly polluted waste materials must be disposed of. The method of choice recommended for disposal is the combustion in a hazardous-waste incinerator in accordance with the specifications of the Waste Management Technical Guide (TA Abfall). Preliminary studies are currently being made for the construction of a waste incinerating plant in this region. An alternative option for disposal would be underground storage in an abandoned salt mine. Thuringia has a number of abandoned potassium mines that appear to be well suited for this purpose. On the other hand, there have been no systematic investigations so far on the long-term behaviour of hazardous waste under the geogenic conditions of potassium and rock salt mining, so that further studies will be necessary. (orig.)

1994-01-01

346

PT Kaltim Prima Coal mine development  

Energy Technology Data Exchange (ETDEWEB)

In 1985, Indonesia produced less than 4 million tonnes of coal, but by 1995, this had increased tenfold to more than 40 million. This rapidly rising trend is expected to continue and by the year 2000, between 70-80 million tonnes/year will probably be mined annually in the country. Currently, over 70% of this production goes into the export market providing around 1 billion dollars per annum in foreign exchange. By far the largest current contributor it PT Kaltim Prima Coal (KPC), a joint venture mining operation of RTZ-CRA and BP, which is expected to produce 11.5 million tonnes in 1996. KPC is one of an original nine companies which in 1982 entered into a Contract of Work with the State Coal Company. First production by these companies commenced in 1989 (with a trial mine of KPC) and of the total 44 million tonnes produced in Indonesia in 1995, these companies supplied 77% (or 34 million tonnes). Very large scale exploration and development programmes have been a feature of the successful start-up and expansion of these coal companies. KPC has for instance, invested over 650 million dollars so far in developing one of the world`s safest and most efficient mines together with associated infrastructure and a world class deep water port. These investments have also involved the introduction of the latest technologies and management systems and the transfer of this knowledge to Indonesian staff by intensive training and development programmes. This paper provides an insight into the success of this joint venture in achieving and then exceeding the original vision of the company as set at the completion of the definitive feasibility study in 1988. 11 figs., 1 tab.

Osborne, D. [RTZ-CRA Technical Services (Australia)

1997-08-01

347

Reducing methane emissions in coal mine ventilation  

Energy Technology Data Exchange (ETDEWEB)

The article examines the potential for reducing methane emissions from coal mine ventilation air. In the first part of the article, ventilation air methane emissions and the technologies that available, or under development to reduce these emissions were considered. The second part of the article summarises the findings of EPA's marginal abatement cost analyses and considers the size of the potential mitigation market. 1 fig., 1 tab.

Schultz, K. [US EPA (USA)

2003-05-01

348

Productivity performances of surface coal mines  

Energy Technology Data Exchange (ETDEWEB)

This paper studies the effect of labour utilization, capital investment and operational procedures on the total production output, expressed as the total volume of coal and overburden moved per year, for various mining operations selected in South Africa, the USA and Australia. It concludes that good management of the few critical things results in the best-practice operations. The units of capital invested in the mining operation's digging capacity were the same irrespective of the size of the operation. The difference lies in the way the various mines focus on working practices and the critical measuring points they use. The areas in which the best performing operations outperformed the moderately performing operations are: work practices; paying attention to details and planning and evaluation of blasting blocks. These are the areas that the moderately performing operation needs to improve in order to become more competitive in the international market environment. 5 refs., 3 figs.

Moolman, C.J.; Fourie, G.A. [CSIR Miningtek, Johannesburg (South Africa)

2000-07-01

349

Monitoring of radon daughters in coal-mine atmospheres  

International Nuclear Information System (INIS)

In some coal mines in the Upper Silesian Coal Basin a significant concentration of radon daughters is observed. Monitoring of radon daughters in coal-mine atmospheres involves special problems related to high coal-dust concentration and methane hazards. To solve these problems an 'Integrating Radon Daughters Monitor' (IRDM) for coal-mine atmospheres has been developed. The instrument consists of a typical dust sampler, BARBARA IIIa, used in Polish coal mines, and a supplementary unit with thermoluminescent detectors. Laboratory tests in the calibration chamber showed that the IRDM response to the cumulative activity of radon daughters is independent of the dust concentration within the range 5 to 80 mg/m"3 (respirable fraction). A detection limit of about 0.002 WL can be achieved with a sampling time of 8 h. Some preliminary results obtained in Polish coal mines are included. (author)

1984-01-01

350

A method for mining flat coal strata  

Energy Technology Data Exchange (ETDEWEB)

The purpose of the invention is to increase the effectiveness and safety of mining highly gaseous coal strata by partial release of the rocks from stresses and to reduce the preparatory operations and the expenditures on reinforcing drifts. The stated purpose is achieved by the fact that according to the method for mining flat coal strata, which includes tunneling ventilation and conveyor drives, an incline, reinforcing the drifts, the combined mining of the extraction sectors along the dip, the passage of the ventilation incline beyond the longwall at a distance equal to the width of two extracting sectors from the previously tunneled incline, a discharge incline is tunneled, from which degasification boreholes are drilled from both sides along the strike. The boreholes are pointed toward the previously tunneled incline, the design line for tunneling the ventilation incline is overlapped, after which the mining of each even number extracting sector is conducted in columns along the dip, while the reinforcement of each subsequent incline is performed by a support which is extracted with capping of the previously tunneled incline.

Mashkovtsev, B.I.; Ayruni, A.T.; Balykhin, G.A.; Mashkovtsev, I.L.; Timofeyev, A.V.

1984-01-01

351

Analyis on influence factors of unit cost of coal mining  

Energy Technology Data Exchange (ETDEWEB)

Based on historical cost data of China's key state-owned coal mines, a study was made of the unit cost of coal mining and its components. This study revealed that in China the unit cost of coal mining has risen during the last few decades. The causes are various, such as policy of operation, pricing variation, labor cost, etc. 3 refs., 5 figs.

Zhang, A.; Xu, J. [Heilongjiang Institute of Science and Technology, Harbin (China)

2007-02-15

352

Extracting value from coal mine methane  

Energy Technology Data Exchange (ETDEWEB)

Emerging US policy to regulate greenhouse gas (GHG) emissions through a cap-and-trade program presents mine managers with a new opportunity to explore and develop methane utilization or abatement projects that generate value from the anodization of carbon offset credits. In addition, the rising focus on US energy security and domestic energy supply is promoting mine managers and engineers to give further consideration to the importance of their methane gas by-products. The market through which coal mine methane offset projects can be developed and carbon offset credits monetized is quickly maturing. While many methane utilization projects have previously been uneconomical, the carbon offset credit market provides a new set of financing tools for mine engineers to capitalize these projects today. Currently , there are two certification programs that have approved project protocols for CMM projects. The Voluntary Carbon Standard (VCS) offers a methodology approved under the Clean Development Mechanism, the international compliance based offset market under the Kyoto Protocol. The VCS protocol is applicable to projects that combust ventilation air methane (VAM) and methane extracted from pre-and post-mine drainage systems. The Chicago Climate Exchange (CCX), which operates a voluntary yet binding cap-and-trade market, also has an approved protocol for CMM projects. CCX's protocol can be applied to projects combusting VAM, and methane extracted from pre-and-post-mine drainage systems, as well as abandoned mines. The article describes two case studies - Developing a gob gas utilization project financed by carbon offset credits and First VAM oxidation system to be commissioned at an operating mine in the US. 1 tab., 4 photos.

Liebert, B. [Verdao Group (United States)

2009-06-15

353

Continuous coal quality control in opencast mining  

Energy Technology Data Exchange (ETDEWEB)

Cost-effective processing of coal and ore requires the chemical and physical properties to be known as early as possible. The results of traditional sampling procedures and analytical methods are generally not known until such a late time hence values ascertained are useless for the process on-line control. It is demonstrated by the example of the Garzweiler opencast mine how the lignite upstream of temporary storage in the coal stockpiles is sampled by means of the RODOS (Rapid On-Line Determinator On Site) analyser system. The analytical results are considered in the stockpile balance showing what stockpile coal can be taken to ensure optimum homogenisation regarding ash and sulphur content. 1 ref., 6 figs., 1 tab.

Einenkel, O. [Rheinbraun Engineering, Cologne (Germany). Electrical Dept.

1996-12-31

354

30 CFR 933.764 - Process for designating areas unsuitable for surface coal mining operations.  

Science.gov (United States)

...2009-07-01 false Process for designating...for surface coal mining operations. 933... § 933.764 Process for designating...for surface coal mining operations. ...chapter, State Processes for Designatng Areas...for Surface Coal Mining...

2009-07-01

355

30 CFR 947.764 - Process for designating areas unsuitable for surface coal mining operations.  

Science.gov (United States)

...2009-07-01 false Process for designating...for surface coal mining operations. 947... § 947.764 Process for designating...for surface coal mining operations. ...chapter, State Processes for Designating...for Surface Coal Mining...

2009-07-01

356

30 CFR 937.764 - Process for designating areas unsuitable for surface coal mining operations.  

Science.gov (United States)

...2009-07-01 false Process for designating...for surface coal mining operations. 937... § 937.764 Process for designating...for surface coal mining operations. ...chapter, State Processes for Designating...for Surface Coal Mining...

2009-07-01

357

30 CFR 905.764 - Process for designating areas unsuitable for surface coal mining operations.  

Science.gov (United States)

...2009-07-01 false Process for designating...for surface coal mining operations. 905... § 905.764 Process for designating...for surface coal mining operations. ...chapter, State Processes for Designating...for Surface Coal Mining...

2009-07-01

358

20 CFR 718.203 - Establishing relationship of pneumoconiosis to coal mine employment.  

Science.gov (United States)

...relationship of pneumoconiosis to coal mine employment. 718.203 Section...ADMINISTRATION, DEPARTMENT OF LABOR FEDERAL COAL MINE HEALTH AND SAFETY ACT OF 1969, AS...relationship of pneumoconiosis to coal mine employment. (a) In...

2010-04-01

359

30 CFR 74.5 - Tests of coal mine dust personal sampler units.  

Science.gov (United States)

...2010-07-01 2010-07-01 false Tests of coal mine dust personal sampler units. 74.5 Section...AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR COAL MINE SAFETY AND HEALTH COAL MINE DUST SAMPLING DEVICES Approval Requirements...

2010-07-01

360

75 FR 73995 - Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal Dust Monitors  

Science.gov (United States)

...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...occupational exposure to respirable coal mine dust and lower miners'...

2010-11-30

 
 
 
 
361

20 CFR 718.302 - Relationship of pneumoconiosis to coal mine employment.  

Science.gov (United States)

...Relationship of pneumoconiosis to coal mine employment. 718.302 Section...ADMINISTRATION, DEPARTMENT OF LABOR FEDERAL COAL MINE HEALTH AND SAFETY ACT OF 1969, AS...Relationship of pneumoconiosis to coal mine employment. If a miner who...

2010-04-01

362

30 CFR 77.1713 - Daily inspection of surface coal mine; certified person; reports of inspection.  

Science.gov (United States)

...false Daily inspection of surface coal mine; certified person; reports of inspection...ADMINISTRATION, DEPARTMENT OF LABOR COAL MINE SAFETY AND HEALTH MANDATORY SAFETY...1713 Daily inspection of surface coal mine; certified person; reports of...

2009-07-01

363

76 FR 12648 - Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal Dust Monitors  

Science.gov (United States)

...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...occupational exposure to respirable coal mine dust and lowering the risk that...

2011-03-08

364

78 FR 45566 - Agency Information Collection Activities; Submission for OMB Review; Comment Request; Coal Mine...  

Science.gov (United States)

...for OMB Review; Comment Request; Coal Mine Dust Sampling Devices ACTION: Notice...collection request (ICR) titled, ``Coal Mine Dust Sampling Devices,'' to the...DOL-MSHA. Title of Collection: Coal Mine Dust Sampling Devices. OMB...

2013-07-29

365

78 FR 64537 - Agency Information Collection Activities; Submission for OMB Review; Comment Request; Coal Mine...  

Science.gov (United States)

...for OMB Review; Comment Request; Coal Mine Rescue Teams: Arrangements for Emergency...collection request (ICR) titled, ``Coal Mine Rescue Teams: Arrangements for Emergency...the following requirements for a coal mine: reporting to the MSHA how the...

2013-10-29

366

78 FR 35975 - Proposed Information Collection; Comment Request; Safety Standards for Underground Coal Mine...  

Science.gov (United States)

...Safety Standards for Underground Coal Mine Ventilation--Belt Entry Used as...Safety Standards for Underground Coal Mine Ventilation--Belt Entry Used as...Safety Standards for Underground Coal Mine Ventilation--Belt Entry Used...

2013-06-14

367

76 FR 25277 - Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal Dust Monitors  

Science.gov (United States)

...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous...

2011-05-04

368

20 CFR 726.203 - Federal Coal Mine Health and Safety Act endorsement.  

Science.gov (United States)

... 2009-04-01 false Federal Coal Mine Health and Safety Act endorsement...ADMINISTRATION, DEPARTMENT OF LABOR FEDERAL COAL MINE HEALTH AND SAFETY ACT OF 1969, AS...BLACK LUNG BENEFITS; REQUIREMENTS FOR COAL MINE OPERATOR'S INSURANCE...

2009-04-01

369

76 FR 10070 - Division of Coal Mine Workers' Compensation; Proposed Extension of Existing Collection; Comment...  

Science.gov (United States)

...Compensation Programs Division of Coal Mine Workers' Compensation; Proposed...Medical History and Examination for Coal Mine Workers' Pneumoconiosis (CM-988...applies for benefits, the Division of Coal Mine Workers' Compensation...

2011-02-23

370

75 FR 69617 - Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal Dust Monitors  

Science.gov (United States)

...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...lower miners' exposure to respirable coal mine dust by revising the Agency's...

2010-11-15

371

75 FR 63864 - Division of Coal Mine Workers' Compensation; Proposed Extension of Existing Collection; Comment...  

Science.gov (United States)

...Compensation Programs Division of Coal Mine Workers' Compensation; Proposed...Comparability of Current Work to Coal Mine Employment (CM-913). A copy...black lung disease arising out of coal mine employment, and their...

2010-10-18

372

76 FR 30878 - Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal Dust Monitors  

Science.gov (United States)

...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous...

2011-05-27

373

76 FR 2617 - Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal Dust Monitors  

Science.gov (United States)

...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous Personal...Lowering Miners' Exposure to Respirable Coal Mine Dust, Including Continuous...

2011-01-14

374

20 CFR 726.1 - Statutory insurance requirements for coal mine operators.  

Science.gov (United States)

...Statutory insurance requirements for coal mine operators. 726.1 Section 726...ADMINISTRATION, DEPARTMENT OF LABOR FEDERAL COAL MINE HEALTH AND SAFETY ACT OF 1969, AS...BLACK LUNG BENEFITS; REQUIREMENTS FOR COAL MINE OPERATOR'S INSURANCE General...

2010-04-01

375

78 FR 72717 - Division of Coal Mine Workers' Compensation; Proposed Collection; Comment Request  

Science.gov (United States)

...Compensation Programs Division of Coal Mine Workers' Compensation; Proposed...Comparability of Current Work to Coal Mine Employment (CM-913). A copy...black lung disease arising out of coal mine employment, and their...

2013-12-03

376

75 FR 51488 - Division of Coal Mine Workers' Compensation; Proposed Extension of Information Collection...  

Science.gov (United States)

...Compensation Programs Division of Coal Mine Workers' Compensation; Proposed...I. Background: The Division of Coal Mine Workers' Compensation administers...dependents. When the Division of Coal Mine Workers' Compensation...

2010-08-20

377

Current problems and trends in opencast coal mining in Bulgaria  

Energy Technology Data Exchange (ETDEWEB)

The role and the problems of opencast coal mining in Bulgaria under market conditions have been discussed. The structural changes in coal mining industry have been pointed out as well as the difficulties in the fulfilment of the recovering regime under the conditions of monetary board. In spite of the great difficulties increase of coal production in the last year can be observed. The important further trends in opencast coal mining according to the developed in 1995 strategy of energy production until 2020 have been indicated. Attention has been drawn to solve the recent problems in this field and the necessity of new qualification of mining specialists. 4 refs., 3 figs.

Hristov, S.G. [University of Mining and Geology, Sofia (Bulgaria)

1998-12-31

378

Subsidence and reclamation in coal mine areas of China  

International Nuclear Information System (INIS)

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

1994-04-24

379

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

380

Working group report: methane emissions from coal mining  

International Nuclear Information System (INIS)

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

1993-07-01

 
 
 
 
381

Coal mine safety - where do we go from here?  

Energy Technology Data Exchange (ETDEWEB)

The twentieth century has experienced considerable success in coal mine safety. However, mine safety problems in the Indian coal mining industry in terms of the reduction of accidents/injuries were being addressed (and continue to be done so) through reactive measures of hazard control. Further, attention is being mainly focused on fatal and serious accidents, ignoring the minor and near-miss/near-hit incidences, which are also potential safety problems in mines. To further improve the safety standard in coal mines, there needs to be a radical change in the way safety issues are currently being dealt with by the coal mining industry. In this paper, the issues of safety of coal mines are addressed by examining the past, present, and future scenarios of accident/injury prevention. The paper concludes that emphasis has to be laid on various emerging areas such as human factors/ergonomics, human behaviour, injury epidemiology, injury surveillance system, and computer-based training using information technology. The coal mining industry should fund safety research; various organizations including the DGMS (Directorate-General of Mines Safety), CMRI (Central Mining Research Institute), academic institutions, and other research organizations should work together to achieve the ultimate goal of further improving safety in coal mines. 32 refs., 6 figs., 1 tab.

Bhattacharjee, A. [Indian Institute of Technology, Kharagpur (India). Dept. of Mining Engineering

2000-07-01

382

Tests of fully automated coal mining equipment (I)  

Energy Technology Data Exchange (ETDEWEB)

The authors outline the fully automated mining equipment which is being developed by the Coal Mining Research Centre (Japan), Mitsui Coal Mining and the Mitsui Miike Machinery, Co., Ltd. Tests of the equipment in a moderately dipping middle seam are reported. Accounts are given of a system for speeding up the development of automated mining technology which can cope with on-site conditions, and of tests involving the two automated shearer loaders which have been developed, plus remotely controlled (batch control) powered supports and powered supports fitted with microprocessors. The tests indicate that the automated supports and one of the automated shearer loaders have potential as practical coal mining equipment.

Satoh, K.; Kawamura, T.; Yamada, R.; Naitoh, H.; Yamashita, H.; Tanigawa, H.

1984-01-01

383

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

384

Zoning effect in spatial data mining and its application in coal mine  

Energy Technology Data Exchange (ETDEWEB)

Taking the thickness of coal seams in a coal mine as an experimental case, the zoning effect in spatial data mining was studied and confirmed by adopting the Fuzzy C - Means (fuzzy clustering) for the investigation of the zoning effect in spatial data mining. 9 refs., 2 figs., 2 tabs.

Sun Qing-xian; Fang Tao; Guo Da-zhi; Yang Ke-ming [China Institute of Water Resources and Hydropower Research, Beijing (China). Remote Sensing Application Center

2007-08-15

385

4D seismic data acquisition method during coal mining  

Science.gov (United States)

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

Du, Wen-Feng; Peng, Su-Ping

2014-06-01

386

Regularity of distribution of EMR in workings of coal mines  

Energy Technology Data Exchange (ETDEWEB)

Using a KBD5 type electromagnetic radiation (EMR) detector, EMR is measured at different orientation of working faces in different coal seams in China's No 8 mine of Pingdingshan Coal Industrial Corporation. The EMR results are compared with the usual forecasting methods for predicting coal and gas outburst phenomena. It has been observed that EMR method provides a feasible base for predicting such phenomena to take preventive measures against coal and gas outburst catastrophes in mines. 2 refs., 9 figs.

Wang, E.; He, X.; Nie, B.; Dou, L.; Ma, S.; Zhang, L. [China University of Mining and Technology, Jiangsu (China)

2001-07-01

387

Coal Mines Committee. Eleventh session Report II. Employment and training with reference to health and safety at coal mines  

Energy Technology Data Exchange (ETDEWEB)

Statistics on occupational hazards (accidents and diseases) in coal mines in dfferent countries are presented. Technical progress made in the coal mining industry is outlined and its impact on employment and training (as related to safety and health) is assessed. Economic aspects of accident prevention in relation to the risks of coal mining are discussed. The impact of training, education and information on safety and health is finally covered.

1982-01-01

388

Analysis of pneumoconiosis incidence in a coal mine  

Energy Technology Data Exchange (ETDEWEB)

Pneumoconiosis was investigated in a group of 2,495 coal miners working in one underground black coal mine and a group of 822 retired miners who had worked in the same coal mine. Only miners employed longer than 8 years were considered. Investigations showed that the risk of pneumoconiosis was moderate (incidence below 1.0%), however it was higher among the pensioners. Irregular opacity of the s, t and u type was characteristic of coal miners with a higher service life working at coal faces, in mine drivage and explosive fracturing at the working places with highest dust emission. 4 refs.

Marek, K.; Kujawska, A.; Stasiow, A.; Imielska, A.; Juras, A. (Instytut Medycyny Pracy, Sosnowiec (Poland). Klinika Chorob Zawodowych)

1992-05-01

389

Use of ground penetrating radar in underground coal mining  

Science.gov (United States)

This paper reports on a novel application of ground penetrating radar to a longwall steering problem in the coal mining industry. The main goal of the work was to determine whether a radar-based system could be used to detect coal-rock interfaces in order to establish a suitable mining horizon within the coal seam. We investigated the feasibility of the radar unit and determined that a positive correlation exists between the radar data and known coal-rock interface geology. We also highlight some of the unique challenges encountered when attempting to develop electrical equipment that is suitable for hazardous underground coal mining environments.

Ralston, Johnathon C.; Hainsworth, David W.

2000-04-01

390

Crunch mining: the logistics of western Canadian export coal supply  

Energy Technology Data Exchange (ETDEWEB)

The western Canadian bituminous coal supply is reviewed briefly over the past 25 years, and then the industry's performance is considered with regard to bituminous coal production trends, coal pricing, and 1986-1991 financial performance for the British Columbia coal industry. Coal industry restructuring including economic difficulties, corporate consolidation and integration, lost production and markets, and social and environmental problems; coal production capability, capacity and coal recovery rates, and productivity; and coal supply capability, supply chain systems, and transportation charges are described with regard to mining viability and sustainable development. Some ways to improve development and marketing of western Canadian coal are suggested. 17 figs., 2 tabs.

Jamieson, E. (Jamieson Resources Ltd., Vancouver, BC (Canada))

1993-09-01

391

Coal mining evolution in the last 35 years in Mexico. Improvements in mine safety, ventilation, methane control and coal production  

Energy Technology Data Exchange (ETDEWEB)

Coal mining started in Mexico in the state of Coahuila in 1884 with surface and drift mining operations near to the outcrops. Coahuila has 10 basins with the only economic coal resources of the country. Part of this coal is metallurgical and other is steam coal used to generate currently 8% of the country's electricity. As in other countries of the world, there were a lot of fatalities in coal mining due to methane explosions from 1889 to 1970, when the Mexican regulations for coal mines were upgraded after a big explosion affected two mines due to a ventilation failure. This happened after connecting both mines few days before the explosion, which occurred in March 31st 1969 killing 156 men. Several recommendations issued by American engineers from the US Bureau of Mines were made to improve mine safety. Mining equipment and main ventilation systems have been upgraded. Modern longwall equipment, continuous miners and roadheaders for the development sections is now in use. This paper explains the evolution of coal mining after applying these recommendations, and the improvements and results in safety, ventilation and methane control and coal production. 3 refs., 11 figs.

Aguirre, J.R.P. [Minerales Monclova, Coahuila (Mexico)

2005-07-01

392

Analyzing and forecasting labor productivity in coal mines  

Energy Technology Data Exchange (ETDEWEB)

Discusses labor productivity in underground black coal mines of the Karaganda basin. From 1932 to 1940 labor productivity increased by 3.8 times, from 1940 to 1955 it increased by 7.1%, from 1955 to 1965 by 19.6% (increased use of shearer loaders), from 1965 to 1975 by 8.4% (use of face systems), from 1975 to 1989 labor productivity in the Karaganda mines declined and in 1989 it reached the level of the year 1971. Methods for forecasting labor productivity in underground coal mines are reviewed on the example of the Karaganda basin. Effects of the main factors on labor productivity are considered: deterioration of mining and geologic conditions, increasing length of mining workings in relation to coal output, coal output per working face and coal mine, number of working faces, organizational models, etc. Correlations of individual factors and labor productivity decrease in the Karaganda basin are discussed. 7 refs.

Karenov, R.S. (Karagandinskii Politekhnicheskii Institut (USSR))

1991-10-01

393

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

394

Using hydraulic excavators to mine variably dipping coal seams  

Energy Technology Data Exchange (ETDEWEB)

The Line Creek Mine of Crows Nest Resources started mining coal in the fall of 1981. There are seven mineable seams with thicknesses ranging from 1.5 to 13 metres and with dips varying from 0 degrees to 60 degrees. This, together with internal partings and the very friable nature of the coal, creates a number of mining problems. The coal is divided into zones depending on the dip of the seam. Each zone requires a different mining technique to ensure optimum recovery and low dilution while still keeping fines to a minimum. Line Creek employs a combination of hydraulic front shovels and backhoes to mine its coal without blasting or use of dozers. This has been very successful in reducing the proportion of fine coal hauled to the plant, thus improving quality control and reducing costs in coal processing.

Bertinshaw, R.G.

1985-10-01

395

Good prospects for Indonesia's coal mining industry  

Energy Technology Data Exchange (ETDEWEB)

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

Suhala, S. [APBI-ICMA (Indonesia)

2010-05-15

396

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

397

Illinois mined-out coal areas: map and data system  

Energy Technology Data Exchange (ETDEWEB)

The Illinois State Geological Survey has completed a digitized file of outlines and locations of all known abandoned mines in Illinois (more than 5,500) and a computerized file of mining methods, mining conditions, geological conditions, and historical and geographic data for each mine site. The files were compiled in response to increasing requests for such information from public and private agencies involved in urban planning, coal resource evaluations, and mine subsidence investigation. The mine outlines were digitized from original mine maps and/or microfilm copies of the maps. ILLIMAP, an Illinois State Geological Survey-designed computer-based mapping system, was modified to manipulate the digitized data. Maps generated by this system show mine outlines, portal locations, and index number assigned to each mine. The end products of this project will be a comprehensive Illinois coal-mine data file and two sets of mined-out-area maps, one set consisting of overlays for the U.S. Geological Survey topographic map series in the coal areas, the other of county base maps. Mine index numbers on the maps will be used to retrieve information from the coal-mine data file. Overlays will be housed at Illinois Abandoned Mined Land Reclamation Council offices.

Danner, S.K.

1983-09-01

398

Floor design in underground coal mines  

Science.gov (United States)

Floor failure and excessive heave in underground coal mines can jeopardize the stability of the whole structure, including the roof and pillars, due to differential settlements and redistribution of stress concentrations. Besides, floor failure is detrimental to haulageway operation and can lead to unacceptable conditions of high deformation. Thus, the design of any underground opening must consider roof/pillar and floor as one structural system. This paper presents guidelines for the design of mine floors, including the necessary field and laboratory investigations and the determination of the bearing capacity of floor strata. The design methodology is based essentially on a modified Hoek-Brown rock mass strength criterion. The main modifications are the introduction of the concept of the point of critical energy release to account for the long term strength, the inclusion of tensile strength and the adoption of a lithostatic state of stress in the rock mass. The determination of the dimensionless parameters m and s result from correlations with the RMR (“rock mass rating”) of the Geomechanics Clasification. Nine case histories, both in longwall and room and pillar coal mining, were analyzed with the proposed methodology.

Faria Santos, C.; Bieniawski, Z. T.

1989-10-01

399

Dermatoses of Belchatow brown coal mine employees  

Energy Technology Data Exchange (ETDEWEB)

Evaluates the results of examinations carried out in the Belchatow brown coal surface mine on skin diseases. Influence of working conditions specific for brown coal mines on the development of some dermatoses is analyzed. From 1978 to 1979 443 miners were examined. Two groups of miners were examined separately: 1. 235 miners who contacted the firm physician due to skin problems and 2. 208 miners who underwent a periodic examination. In group 1 skin dermatoses were found in 86% of all cases, and in group 2 in 48%. Foot skin inflammation, particularly interdigital intertrigo, was the most common dermatosis. Oil acne (occupational disease of coal miners) was diagnosed in 15 cases, common acne in 23 cases, pytiriasis versicolor in 19 cases, erythrasma in 10, eczema and other contact dermatitis in 10 cases. Investigations show that 23% of the foot interdigital intertrigo is caused by mycotic infections. Dermatoses of the skin of miners' feet are caused mainly by rubber protective boots. (10 refs.) (In Polish)

Ruszczak, Z.; Bienias, L.; Proszczynska-Kuczynska, W.

1981-09-01

400

Study of gas permeability in top-coal during mechanical longwall top-coal caving mining  

Energy Technology Data Exchange (ETDEWEB)

Due to greater mining height, the gas permeability in the top-coal ahead of the working face in mechanical longwall top-coal caving mining is quite different from that of slice mining. The present problems of gas permeability theory are discussed. The features of longwall mining with top-coal caving is taken into account, and the existing formula of rock permeability is revised by introducing the equivalent modulus and inhomogeneity coefficient of top-coal fracture as well as the effective stress. The formula of the top coal permeability coefficient is presented, which is validated by a case study. 14 refs., 1 fig.

Cheng, G.; Wu, J.; Wang, S. [China Academy of Sciences, Beijing (China). Institute of Geology and Geophysics

2002-12-01

 
 
 
 
401

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

Energy Technology Data Exchange (ETDEWEB)

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

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

2008-02-15

402

Biodesulfurization of Subbituminous Coal by Mixed Culture Bacteria Isolated from Coal Mine Soil of South Sumatera  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Coal as fuel should be necessarily pre-treated by desulfurization in order to prevent excessive emissions of sulfur dioxide, a precursor of acid rain. Organic sulfur in coal can be eliminated by microbial action through the technology known as biodesulfurization. Source of microorganisms in the present study was coal mine soil in which microorganisms have been adapted to use the sulfur in coal. Coal mine in South Sumatra was choosen as source of microorganisms in this study, because it is an ...

Pingkan Aditiawati; Akhmaloka; Dea Indriani Astuti; Sugilubin; Megga Ratnasari Pikoli

2013-01-01

403

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

International Nuclear Information System (INIS)

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

2005-11-01

404

A knowledge-based approach to coal mines safety analysis  

Energy Technology Data Exchange (ETDEWEB)

Analysis of safety in coal mines represents a very complex process based on estimation of numerous and interdependent parameters. Complexity of the subject matter requires a high level of expert knowledge and great experience. This paper discussed one of the possible approaches to solving of the relative problem by diagnostic expert system for coal mine safety analysis (PROMINEX). 4 figs.

Lilic, N.; Gagic, D.; Stankovic, R. [University of Belgrade, Belgrade (Yugoslavia). Faculty of Mining and Geology

1996-12-31

405

Additives for Strengthening Backfill Materials in Steep Coal Seam Mining.  

Science.gov (United States)

A testing program was conducted to design a cemented backfill for hydraulic placement in underhand cut and fill mining of a steeply dipping coal seam. The testing evaluated the use of three different backfill aggregates, locally available at the coal mine...

C. E. Brechtel D. A. Thies J. R. Aggson

1985-01-01

406

Surface coal mining machinery and equipment. Open file report  

Energy Technology Data Exchange (ETDEWEB)

Surface coal mining equipment was studied to determine existing equipment practices and technology and its compatibility with mining techniques and reclamation requirements. In addition, the availability and economics of alternative equipment types were documented as well as the identification of needed research in earth-handling technology to increase coal production and productivity. (GRA)

Habeck, W.J.

1975-12-01

407

COAL MINE RELATED STREAM SEDIMENT GEOCHEMISTRY IN SOUTHERN ILLINOIS  

Science.gov (United States)

A regional survey in stream sediment geochemistry indicates that downstream areas from coal mines or coal related land uses can contain four times the median value of several elements, specifically cadmium cobalt, copper, iron, manganese, nickel and zinc. In those parts of a mine...

408

???????????????? Research on Working Mechanism of Coal Mine Safety Production  

Directory of Open Access Journals (Sweden)

Full Text Available ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? The benefit orientation, responsibility sharing, safety culture and administration system are the key issues of coal mine safety production in China. For the purpose of integrated management, reengineering the external control mechanism and internal working mechanism of coal mine safety production, constructing bring up and action system of safety culture from the human and its behavior of intrinsic safety.

???

2012-07-01

409

Some questions of technological progress in coal mines. [USSR  

Energy Technology Data Exchange (ETDEWEB)

This paper discusses problems associated with increasing the productivity of underground black coal mining in the USSR. From 1981 to 1985 88% of investment and 68% of construction operations will fall on modernization of existing coal mines. Development and reconstruction of 36 coal mines should be completed by 1985. Mine reconstruction should increase coal output by 20 megatonnes/year with a simultaneous decrease in personnel by 22,000 to 25,000. Cost of construction of a new horizon ranges from 70 to 100 million rubles. The rate of productivity increase in underground black coal mining is unsatisfactory. The output of 40 to 45% of all working faces and development workings is below the planned level. Due to downtime in black coal mining coal losses amount to 50 megatonnes/year or to 13% of coal output. Causes of downtime are analyzed: fires, explosions of methane and coal dust, destruction or partial damge to underground workings, occurrence of geologic disturbances, machine failures. About 20 megatonnes/year of coal are lost due to machine failures. The five year plan for the period from 1981 to 1985 assumes that labor productivity for a miner will increase by 4%. Labor consumption due to deteriorating geological conditions will increase by 7.5.

Rozhchenko, E.N.

1982-05-01

410

STABILITY ANALYSES OF FOOTWALL SLOPES IN OPEN PIT MINING  

Directory of Open Access Journals (Sweden)

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

ABEL SÁNCHEZ JUNCAL

2010-01-01

411

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

Energy Technology Data Exchange (ETDEWEB)

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

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

1981-04-01

412

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

413

Coal mine methane management, Nord?Pas?de?Calais (France)  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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

De?fossez, Pierrick; Lemal, Sandrine; Schumacher, Jean-paul

2013-01-01

414

Fractionation of chemical elements including the REEs and 226Ra in stream contaminated with coal-mine effluent  

International Nuclear Information System (INIS)

Water draining from abandoned open-pit coal mines in southeastern Ohio typically has a low pH and high concentrations of Fe, Al and Mn, as well as of trace metals (Pb, Cu, Zn, Ni, Co, etc.) and of the rare earth elements (REEs). The cations of different elements are sorbed selectively by Fe and Al hydroxide precipitates which form with increasing pH. As a result, the trace elements are separated from each other when the hydroxide precipitates are deposited in the channel of a flowing stream. Therefore, the low-energy environment of a stream contaminated by mine effluent is a favorable site for the chemical fractionation of the REEs and of other groups of elements with similar chemical properties. The interpretation of chemical analyses of water collected along a 30-km-stretch of Rush Creek near the town of New Lexington, Perry County, Ohio, indicates that the abundances of the REEs in the water appear to change downstream when they are normalized to the REE concentrations of the mine effluent. In addition, the Ce/La ratios (and those of all REEs) in the water decrease consistently downstream. The evidence indicates that the REEs which remain in solution are enriched La and Ce because the other REEs are sorbed more efficiently. The solid Fe(OH)3 precipitates in the channel of Rush Creek upstream of New Lexington also contain radioactive 226Ra that was sorbed from the water. This isotope of Ra is a decay product of 238U which occurs in the Middle Pennsylvanian (Upper Carboniferous) coal and in the associated shale of southeastern Ohio. The activity of 226Ra of the Fe(OH)3 precipitates increases with rising pH, but then declines farther downstream as the concentration of Ra remaining in the water decreases

2004-07-01

415

Economic baselines for current underground coal mining technology  

Science.gov (United States)

The cost of mining coal using a room pillar mining method with continuous miner and a longwall mining system was calculated. Costs were calculated for the years 1975 and 2000 time periods and are to be used as economic standards against which advanced mining concepts and systems will be compared. Some assumptions were changed and some internal model stored data was altered from the original calculations procedure chosen, to obtain a result that more closely represented what was considered to be a standard mine. Coal seam thicknesses were varied from one and one-half feet to eight feet to obtain the cost of mining coal over a wide range. Geologic conditions were selected that had a minimum impact on the mining productivity.

Mabe, W. B.

1979-01-01

416

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

417

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

2003-06-01

418

Major coal mines of the world with high labor productivity  

Energy Technology Data Exchange (ETDEWEB)

An analysis is cited of the status of the coal industry of the basic coal producing nations and a brief description of certain major coal mines in the world is given. Their production capacity, mean daily loading on the clearing walls and labor productivity are cited.

Kulikov, I.O.; Sleptsov, Ye.I.

1984-01-01

419

Coal mine noise standard. Enforcement under the provision of the Federal Coal Mine Health and Safety Act  

Energy Technology Data Exchange (ETDEWEB)

Various aspects of implementing the noise standards in the coal mining industry are discussed. These aspects include a history of the noise regulations, training of mining industry and Bureau of Mines enforcement personnel, requirements of the industry and the Bureau, and the treatment of violations. Those areas that are particularly troublesome and the research they have generated are presented.

Lamonica, J.A.

1972-11-01

420

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