Results 111 to 120 of about 10,633 (207)
Research on Gas Extraction and Cut Flow Technology for Lower Slice Pressure Relief Gas under Slice Mining of Extra-thick Coal Seam. [PDF]
ACS Omega, 2022 Shi Z, Ye D, Hao J, Qin B, Li G.
europepmc +1 more source
Meikuang AnquanIn order to solve the problems of frequent high energy microearthquakes and large roadway deformation in full-mechanized caving “segmented and stratified” combined mining in Yanbei Coal Mine with large dip angle and extra-thick coal seam, theoretical ...
Yong LIU +8 more
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Gong-kuang zidonghua, 2022 The coal resources in Xinjiang are shallowly buried, the coal seam is thick, resulting in poor top coal caving and drawing. And the roof is overhanging in a large area, which makes it impossible to achieve safe and efficient top coal mining. And at present, there are few related researches on efficient coal drawing in fully mechanized working face of ...
SUN Qiang +6 more
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Report of activities of the advanced coal extraction systems definition project, 1979 - 1980 [PDF]
During this period effort was devoted to: formulation of system performance goals in the areas of production cost, miner safety, miner health, environmental impact, and coal conservation, survey and in depth assessment of promising technology, and ...
Isenberg, L., Lavin, M. L.
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Potential Chemical and Energy Uses for Lignite at Hawkdun and Ashers-Waituna, New Zealand [PDF]
, 2004 This preliminary study brings together publically available information and work from earlier studies of the South Island Lignite resources in order to examine the potential value of the lignite deposits held by Kenham holdings to meet New Zealand’s ...
Bouman, R., Kelly, R. J.
core
Reclamation Laws and Costs of Strip Mined Land in North Dakota [PDF]
Coal is becoming more important as a source of energy. There are16 billion tons of economically surface minable coal in North Dakota underlying 700,000 acres.
Gronhovd, Duane E., Scott, Donald F.
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Meitan xuebaoFully mechanized mining technology with extra-large shearing height is the optimal technical approach to achieve high-yield, high-efficiency and high-recovery mining for 6−10 m ultra-thick coal seam in Chinese coal mines.
Hongpu KANG +17 more
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Energy and precious fuels requirements of fuel alcohol production. Volume 4: Appendices G and H, methanol from coal [PDF]
Coal mine location, mining technology, energy consumption in mining, coal transport, and potential availability of coal are discussed.
Back, G., Reddy, T. S., Weinblatt, H.
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FireIn order to determine the reasonable parameters of high-gas and extra-thick coal seam drainage, considering the factors of the coal seam metamorphic degree, stress condition, gas occurrence state, and permeability dynamic change, the gas desorption ...
Hongsheng Wang +2 more
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