Results 21 to 30 of about 934 (182)
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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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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Study on reasonable offset of mining roadway under close distance coal seams goaf of rock burst mine
Meikuang Anquan, 2021 Aiming at the situation that the top coal of the close distance coal seams is goaf and the remaining 30 m coal pillar, taking the 2-1 coal seam and 2-2 coal seam of Hulusu Coal Mine as the research background, the mechanical model of the upper coal goaf ...
DING Guoli, YU Huihua, SU Shijie, SHI Chaohong, LIU Chenyang
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Geofluids, 2022 This research is aimed at exploring the evolution of overlying strata structure and the ground pressure in the working face mining of close-distance coal seams. By taking the Xiashijie Coal Mine as an example, the direct relationship between the rotation
Yupu Zhou +5 more
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Methane Emission Control at the High-Productive Longwall Panels of the Yalevsky Coal Mine [PDF]
E3S Web of Conferences, 2020 The analysis of the experience of methane emission control at the V. D. Yalevsky mine (Kuznetsk coal basin, Russia) during the series of shallow gassy coal seams mining with the high productive longwall was performed.
Meshkov Anatoly +2 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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Research on the evolution and height prediction of WCFZ in shallow close coal seams mining
Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023 Based on the mining conditions of shallow close coal seams in the Jurassic coalfield of northern Shaanxi, in order to explore the evolution and development height prediction of water-conducting fracture zone (WCFZ), combining with measured statistical ...
Jian Cao +3 more
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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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Meikuang Anquan, 2023 In order to prevent and control the emission of toxic and harmful gases in the goaf of close coal seams, it is of great significance to study its distribution and migration behavior.
ZHANG Pengming +6 more
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