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Research on the failure law and actual measurement of floor in extremely close distance thick coal seam mining [PDF]
Scientific ReportsThe vigorous mining of domestic coal resources is accompanied by the complexity and diversification of the conditions of coal seams. Multi seam and close distance coal seam mining have become normalized.
Yupei Deng +6 more
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Top coal drawing law for an extra thick coal seam under the single round group drawing method [PDF]
Scientific ReportsTo solve the problems of poor top coal drawing, lagging collapse, and difficulty in parallel operation of mining and drawing in extra-thick coal seams, considering the 8222 working face of the Tashan Mine as the engineering background, we first ...
Weidong Pan +4 more
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Top coal caving mining technique in thick coal seam beneath the earth dam
International Journal of Mining Science and Technology, 2017 It is important to study the mining technology under structures for raising the coal resources recovery ratio. Based on the geological and mining conditions, the top coal caving harmonic mining technique in thick coal seam beneath the earth dam was put ...
Wenbing Guo, Yi Tan, Erhu Bai
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Reduction of Stress Acting on a Thick, Deep Coal Seam by Protective-Seam Mining
Energies, 2017 Aiming to reduce the high mining stress observed in large-space roof structures during mechanized mining of thick coal seams, a control technique based on protective-seam mining is proposed. This technique was used to investigate the 8108 working face of
Rui Gao +3 more
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Engineering Practice of Ultra-high Pressure Hydraulic Slotting and Pressure Relief Pumping in Through Layer Hole [PDF]
E3S Web of Conferences, 2021 In order to solve the problems of low gas drainage rate and long drainage time in thick coal seam with low permeability, ultra-high pressure hydraulic slotting pressure relief and permeability enhancement technology was applied in the test.
Li Siqian
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Meitan kexue jishu, 2023 Regarding the problem of “key 4% coal seam which is difficult to realize mechanized mining”, it mainly refers to the mechanized mining method of steeply inclined thin and medium thick coal seam with dip angle greater than 60°. For the first time, it puts
WANG Yongyin, GAO Lin, YANG Deli
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Meitan kexue jishu, 2023 The mining of extremely thick coal seam form a large space stope, the fracture disturbance of hard roof spreads to a wide range, the working face weighting has the characteristic of “strong mine pressure”, it is obviously different from rock burst ...
YU Bin +3 more
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Meikuang Anquan, 2020 In order to study the development characteristics and formation location of mining overburden in thick coal seam under thick sandstone, the overburden movement caused by mining of thick coal seam at 2301 working face in a Datong mine is taken as an ...
NIU Hongwei, GAO Feng, HAN Jinli, WANG Mengchao, CAO Zhenjun
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Yantu gongcheng xuebao, 2022 In view of the present situation of frequent rock burst appearances of isolated coal body in coal pillar areas of high-stress roadways without obvious mining disturbance, taking the coal pillar of the high-stress thick coal seam in the seventh mining ...
WANG Gao-ang 1, ZHU Si-tao 1, JIANG Fu-xing 1, LI Shi-dong 2, LIU Jin-hai 3, ZHOU Tao 2, NING Ting-zhou 4, LI Huan 2, KONG Zhen 2
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Shock and Vibration, 2021 Roadways in thick coal seams are widely distributed in China. However, due to the relatively developed cracks and brittleness of coal, the support failure of thick-coal-seam roadways frequently occurs. Therefore, the study of bolt failure characteristics
Zhe Xiang +6 more
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