Results 21 to 30 of about 1,100 (178)
Research on surrounding rock control technology for gob-side entry in close-distance lower coal seam. [PDF]
Sci RepResearch on the surrounding rock control technology of along-the-gob roadways in close-distance lower coal seams of the Xiaoyu Mine in Shuozhou City, Shanxi Province, is conducted using theoretical analysis, numerical simulation, field application, and effect monitoring.
Li S, Wang Z.
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工程科学学报, 2022 To explore the reasonable width of the coal pillar and surrounding rock control technology of the mining roadway in a close-distance coal seam working face, this paper took the mining of No.10 and No.11 coal seams of the Huipodi coal mine as the ...
Hui CHENG +4 more
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Pressure relief and gas outburst prevention in ultra close coal seams a case study on overlying underlying interactions [PDF]
Scientific ReportsUltra-close coal seams are adjacent coal seams in a mining area with a spacing of less than 5 m. They have strong interactions during mining. Due to the small distance between layers, mining the upper coal seam creates a pressure relief zone.
Songjiang Sang, Jinguo Lv
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Study on pressure characteristics of coal seam under close mined-out area
Meikuang Anquan, 2021 The 10# coal seam of Xiangqiao Coal Mine are taken as the engineering background, the failure of the floor of the overlying goaf and the deformation of the roof strata of the underlying coal seam were analyzed theoretically, and the coal pressure ...
ZHOU Bo, ZHANG Wang, ZHOU Ze, LI Kecheng
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Failure Mechanism and Control of Lower Retracement Channel in Close‐Distance Double‐Thick Coal Seams [PDF]
Shock and Vibration, 2021 Under the condition of close‐distance double‐thick coal seams’ mining, the serious strata behavior occurred in the lower retracement channel, which is affected by the double disturbance with upper coal‐pillar static load and mining dynamic pressure.
Fulian He +4 more
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Joint ground and underground gas extraction mode and its key technology for outburst coal seam group
Meitan xuebao, 2023 China’s coal seams are characterized by high ground stress, low permeability, high gas pressure, and high gas content, and their gas outburst hazards are serious. Therefore, some effective gas extraction measures must be taken for coal seams.
Yongjiang ZHANG +5 more
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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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Geofluids, 2022 During upward backfill mining of the close-distance coal seam group, the reasonable design of the backfill body compaction ratio (BBCR) of lower coal seam goaf plays a key role in controlling overburden strata movement and deformation. In this paper, the
Xingping Lai +5 more
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Failure characteristics of extra-thick coal seam under goaf based on double yield model
Meikuang Anquan, 2022 This paper aims to study the influence of the goaf in the upper coal seam on the overlying ultra-thick coal seam and determine the dislocation distance in the roadway layout of the lower coal seam. Based on finite difference method, this research, takig
XUE Jisheng, ZHAO Tielin, PAN Liming
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