Results 31 to 40 of about 12,068 (222)
Geologic considerations in underground coal mining system design [PDF]
, 1981 Geologic characteristics of coal resources which may impact new extraction technologies are identified and described to aid system designers and planners in their task of designing advanced coal extraction systems for the central Appalachian region ...
Camilli, F. A. +3 more
core +2 more sources
Meitan kexue jishu, 2023 High-intensity mining of coal mines in ecologically fragile areas disturbs the groundwater system and causes water resources loss. The typical shallow and deep mining mines in the middle section of the Yellow River basin are selected as the research ...
Hao WANG +9 more
doaj +1 more source
Overall requirements for an advanced underground coal extraction system [PDF]
, 1980 Underground mining systems suitable for coal seams expoitable in the year 2000 are examined with particular relevance to the resources of Central Appalachia. Requirements for such systems may be summarized as follows: (1) production cost; (2)miner safety;
Goldsmith, M., Lavin, M. L.
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Underground Coal Gasification Efficiency in Areas of High Faulting Frequency [PDF]
, 2017 The purpose of this paper is substantiating of efficiency during application of borehole underground coal gasification technology based on target coal seam geology.
Lozynskyi, Vasyl
core +1 more source
Research on Mechanism and Control Technology of Rib Spalling in Soft Coal Seam of Deep Coal Mine
Advances in Materials Science and Engineering, 2021 In order to solve the difficult problem of coal wall spalling of soft seam in deep mining, the occurrence mechanism of coal wall spalling in deep mining is studied based on the limit equilibrium theory of D-P criterion.
Shaobo Li +3 more
doaj +1 more source
Assessing connectivity between an overlying aquifer and a coal seam gas resource using methane isotopes, dissolved organic carbon and tritium [PDF]
, 2015 Coal seam gas (CSG) production can have an impact on groundwater quality and quantity in adjacent or overlying aquifers. To assess this impact we need to determine the background groundwater chemistry and to map geological pathways of hydraulic ...
A Green-Saxena +31 more
core +1 more source
Meikuang Anquan, 2022 According to the shallow sampling depth, inaccurate measurement and control of sampling position, large gas loss and other disadvantages existed in the available sampling technology for measuring gas content in broken soft coal seam, a sampling ...
CHAI Jianlu
doaj +1 more source
Experimental determination of angle values of the rocks full displacement when undermining them by breakage headings [PDF]
, 2017 Purpose. Experimental determination of angle changes of full displacement of rocks by removing the breakage face from the face entry in different mining and geological conditions. Methods.
Filatiev, M, Laguta, A
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Fuel Processing Technology, 2015 The migration rates of representative underground coal gasification (UCG) related products and contaminants through porous surroundings of a georeactor in a shallow coal seam in gaseous and liquid phases were studied in this work. The proposed comprehensive model, taking into account mass transport phenomena both in gaseous and liquid phase, was based ...
Soukup, K. (Karel) +4 more
openaire +2 more sources
Near-Surface Interface Detection for Coal Mining Applications Using Bispectral Features and GPR [PDF]
, 2005 The use of ground penetrating radar (GPR) for detecting the presence of near-surface interfaces is a scenario of special interest to the underground coal mining industry.
A. Merwe van der +30 more
core +3 more sources