Key technologies for extinguishing coal pillar self-heating in close distance coal seams [PDF]
Proceedings of the 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology, 2016 The coal pillar self-heating process of the 16# coal seam, which lays above the 18# coal seam that being mined in Dongrong 2# coal mining was examined. The cause of upper pillar spontaneous combustion during the mining of close distance coal seams was analysed.
Xinhai Zhang, Zhijin Yu, Changshan Zhang
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Optimal measures for gas control on fully mechanized working face of close-distance coal seam group
Gong-kuang zidonghua, 2021 Compared with single coal seam or other coal seam group, the mining process of the close-distance coal seam group is more likely to be affected by the stress of the adjacent seam.
XUE Yanping
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Study on the Instability Mechanism of Coal and Rock Mining under a Residual Coal Pillar in Gently Inclined Short-Distance Coal Seam with the Discrete Element [PDF]
, 2023 The collapse of overlying rocks caused by the instability of residual coal pillars during lower coal seam mining significantly impacts its safety. This paper focuses on the gentle dipping coal seam group and utilizes the discrete element method (DEM) as ...
Chuanwei Zang +4 more
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Prevention and control technology and goaf spontaneous combustion index in distance coal seams
Meikuang Anquan, 2022 In order to study the spontaneous combustion law of close distance easy spontaneous combustion coal seams, taking the mining face of Bulianta Mine No.22 coal seam 3# panel as an example, collected No.22 coal seam samples of Bulianta Mine, three particle ...
GUO Haixiang
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Development characteristics of the rock fracture field in strata overlying a mined coal seam group
PLoS ONE, 2022 The fracture development of the overlying strata after coal mining is an important guarantee of efficient gas drainage. In order to explore the fracture evolution characteristics close to a mined coal seam group, the F15.16−24130 working face in the ...
Yun Qi +4 more
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Gong-kuang zidonghuaResearch on optimal coal drawing parameters for working faces with significant variation in seam thickness, where the thickness exceeds the standard mining height in close-distance coal seams, has been limited.
ZHANG Wei +4 more
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Study on Stability of Stope Surrounding Rock under Repeated Mining in Close-Distance Coal Seams [PDF]
Geofluids, 2022 In order to study the influence of roof stress and fracture distribution characteristics on the stability of stope surrounding rock under repeated mining in close-distance coal seams, the research background of this paper is the close-distance coal seam mining of a mine in Guizhou province, China.
Qiang Li, Guiyi Wu, Dezhong Kong
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Study on Advanced Anchor - grouting Support of Mining Roadway in Close Lower Coal Seam [PDF]
, 2022 Aiming at the problems of difficult support of mining roadway under goaf of the close distance coal seam, obvious large deformation, and long-term continuous deformation of surrounding rock, an advanced bolt-grouting support system is proposed.
Xin Li +4 more
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Study on the Mechanism and Control of Strong Rock Pressure in Thick Coal Seam Mining under the Goaf of Very Close Multiple Coal Seams [PDF]
, 2023 With the increasing proportion of close-distance coal seam mining in China, the problem of strong mining pressure during the mining of close-distance coal seams is becoming more and more severe.
Wenmiao Wang +7 more
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Study on fracture evolution of surrounding roadway under close distance coal pillar [PDF]
, 2021 Aiming at the problem of large deformation of surrounding rock of roadway with coal pillar in near coal seam, based on the geological conditions of Dengmaotong Mine, the UDEC-Trigon numerical model was constructed, and the deformation characteristics and
LIU Hong1in, LI Guodong, WANG Hongzhi
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