Results 41 to 50 of about 1,626 (149)
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
exaly +2 more sources
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
doaj +2 more sources
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
doaj +2 more sources
Applied SciencesTo resolve the critical issues of severe deformation, structural failure, and maintenance difficulties in the advanced reuse zone of gob-side-entry retaining roadways under pillarless mining conditions in ultra-long fully mechanized top-coal caving ...
Heng Wang, Junqing Guo
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International Journal of Coal Science & TechnologyThe Self-formed roadways by roof cutting and pressure relief (SF-RCPR) represents a novel approach that eliminates the need for coal pillars by naturally creating roadways through Roof Cutting Pressure Relief (RCPR) technology.
Jiong Wang +6 more
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Investigation on Hydraulic Fracturing and Cutting Roof Pressure Relief Technology for Underground Mines: A Case Study [PDF]
Lithosphere, 2021 Abstract Using hydraulic fracturing for cutting roof pressure is a critical technology to protect coal pillars. In this paper, based on the engineering background of 18506 working face in the Xiqu Coal Mine, using the methods of theoretical analysis, numerical simulation, and field measurement, a reasonable coal pillar width and ...
Qingliang Chang +4 more
openaire +2 more sources
Current situation of gob-side entry retaining and suggestions for its improvement in China
Meitan kexue jishu, 2023 Based on the article of “Status Quo and Suggestions for the Technology Development of Support along Gob-Side Entry Retaining in China” the work summarized the new technological development of gob-side entry retaining in China since the 21st century ...
HUA Xinzhu +5 more
doaj +1 more source
Advances in Civil Engineering, 2021 To study the optimal layout of prefabricated roof cutting line in gob-side entry retaining with roof cutting and pressure relief, based on the engineering geological conditions of 5249 working face in Beipingdong Coal Mine of Baoyuan Mining Company, the ...
Hao Wu, Chuanqu Zhu, Qingfeng Li
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Meikuang Anquan, 2021 For the large coal pillar stress concentration degree and the large roadway deformation in the process of mining in multi-lane layout face, to reduce the stress level of coal pillar, change the stress distribution ratio and transfer the stress ...
XU Junjian
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矿业科学学报Existing studies on roof cutting and pressure relief mainly focus on their process parameters and engineering applications. However, they are limited in their whole-process coordinated evaluation on the appropriateness, controllability and sustainability
YANG Ke +5 more
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