Results 31 to 40 of about 3,345,704 (190)
The entry retained along gob side with small coal pillar and its surrounding rock control: a case study [PDF]
Scientific ReportsIn order to effectively control the large deformation of coal pillar and roadway during entry retained along gob side with small coal pillar, taking 1311 and 1312 working faces of a coal mine in Shanxi Province as engineering background, the structural ...
Lei Li +5 more
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Lithosphere, 2022 In this study, the movement and failure law of working face overburden and the distribution characteristics of mining stress are analyzed using laboratory test and numerical calculation methods to address the problems of large deformation, failure ...
Jucai Chang +4 more
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Frontiers in Earth ScienceThick sandstone roof strata exacerbate surrounding rock deformation and failure in roadways, posing a severe threat to safe and efficient coal mine production. To address the challenge of controlling surrounding rock in high-stress roadways under such conditions, a novel composite roof cutting and pressure-relief method leveraging the dilation ...
Hainan Gao +10 more
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Roadway Protection by Roof-Cutting in the Support Removing Channel of the Long-Wall Mining Face
Shock and Vibration, 2022 Aiming at strong mining pressure and large deformation of surrounding rock in the main roadway, a mechanical model of the advanced abutment pressure distribution in the long-wall mining face was established.
Xingyun Ren +5 more
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Gong-kuang zidonghuaThe goaf roadways have problems of high surrounding rock stress and large deformation under the conditions of hard roof and wide coal pillars in thick coal seams.
ZHAO Changxin +4 more
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Analysis of the effect of cutting depth under thick immediate roof on gob-side entry retaining stability [PDF]
Gong-kuang zidonghuaThe stability of gob-side entry retaining with roof cutting and pressure relief is primarily influenced by roof cutting parameters. However, determining appropriate cutting parameters for gob-side entry under the effect of a thick immediate roof is ...
WANG Fei +3 more
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Gong-kuang zidonghua, 2019 The gas concentration of No.8 coal seam in north 3 panel of Duerping Coal Mine is high, the direct roof and the basic roof are both hard limestone, and it is easy to form a large area of hanging roof in the upper corner after stoping on working face ...
DONG Zhiyong
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Applied SciencesDeep multi-coal seam mining is plagued by intense mining pressure, significant impacts of multi-working face mining on system roadways, and difficult surrounding rock deformation control—these issues severely threaten the safe and normal operation of ...
Zhongyuan Ren, Mengxiang Wang
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Test of a liquid directional roof-cutting technology for pressure-relief entry retaining mining [PDF]
Journal of Geophysics and Engineering, 2019 Manchao He, Haojie Xue, Ruifeng Huang
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Study on pressure relief and permeability enhancement effect of cutting coal seam with diamond-bead wire saw [PDF]
Meitan xuebaoIn order to explore the pressure relief and permeability enhancement effect around coal seam slot cut by diamond-bead wire saw, firstly, the mechanical model of a doubly clamped roof beam based on the stress of the slot roof was established to analyze ...
Shuqing LI +8 more
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