Disaster mechanism and collaborative control technology of multi-field coupling in extra-thick coal seam with hard roof [PDF]
Meitan kexue jishuAddressing the coupled challenges of strong mine pressure and gas, induced by large-span fracture of the hard roof during the mining of thick coal seams, a systematic understanding of the disaster mechanism through multi-field coupling of the hard roof ...
Bin YU +6 more
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Journal of Rock Mechanics and Geotechnical EngineeringDuring fully mechanized caving mining of thick coal seams, a large amount of strain energy accumulates in the roof, especially when the roof is thick and hard, making it difficult for the roof to collapse naturally.
Qi Wang +5 more
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Ground fracturing pre-control technology for potential mine seismic risk of thick and hard roof
Meitan kexue jishu, 2023 Mines with thick and hard roof face high risks of mine seismic activities and mine pressure during mining, which easily leads to dynamic disasters in mines.
Shuwen WANG +5 more
doaj +1 more source
矿业科学学报, 2021 Yima coal field has an extra-thick hard rock strata, which is the main cause of many dynamic disasters in the mining area. Based on the mining face 21221 of Qianqiu mine in Yima coal field, Henan Province, China, this paper studies the movement ...
Wang Hongwei +5 more
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Study on Dynamic Disaster Mechanisms of Thick Hard Roof Induced by Hydraulic Fracturing in Surface Vertical Well [PDF]
, 2022 With the increase in mining depth and the deterioration of mining conditions, thick and hard overburden movement frequently induces mine earthquakes and rock bursts.
Xiaoguang Shang +17 more
core +1 more source
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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Development status and Prospect of directional hydraulic fracturing technology for coal mine roof [PDF]
E3S Web of Conferences, 2020 Aiming at the harm and control methods of thick and hard roof in coal mine, the paper firstly analyzes the advanced control methods of thick and hard roof, such as directional shaped charge blasting roof control technology, hydraulic fracturing roof ...
Liangwei LI
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The Breaking Span of Thick and Hard Roof Based on the Thick Plate Theory and Strain Energy Distribution Characteristics of Coal Seam and Its Application [PDF]
, 2017 In mining engineering, the thick and hard roof threatens the safe production. Based on Reissner plate theory and combined with weighted residual method, with four edges clamped as the boundary conditions, this paper deduces the theoretical formula of the
Xiaolong Li +3 more
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Mechanical Analysis of the First Fracture Characteristics of Hard Roof of Extra-thick Coal Seam
Meikuang Anquan, 2020 In order to investigate the failure mechanisms of the hard roof in the fully mechanized caving face in the extra-thick coal seam, the mechanical analysis model of the first breaking of the hard top roof in the fully mechanized caving mining of the extra-
LIANG Shaping, LU Yinlong, GUO Peng, WU Bingzhen
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Study on the Spatiotemporal Dynamic Evolution Law of a Deep Thick Hard Roof and Coal Seam
, 2023 Underground mining in coal mines causes strong disturbance to geological structures and releases a large amount of elastic strain energy. When the roof is a hard and thick rock layer, it is easy to cause dynamic disasters such as rock burst.
Huiming Yang +6 more
core +1 more source