Study on disaster mechanism of thick and hard overhanging roof and top cutting control technology
Gong-kuang zidonghuaTo address the challenges of significant deformation and high instability risks in the surrounding rock of unsupported roadways beneath a laterally thick and hard overhanging roof, this study focused on the 3810 working face transport roadway in ...
GENG Ming, SUN Jing
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矿业科学学报This study proposes a deep-hole directional blasting technology based on polymer energy charge packages for roof cutting and pressure relief as a solution to difficult roadway support and poor stability of coal pillars due to high pressure of composite ...
ZHANG Zhaoran +5 more
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Meikuang Anquan, 2021 To study the influence of roof cutting and pressure relief on the surrounding rock control effect of gob-side entry retaining, numerical simulation was carried out by UDEC software, and the stress and deformation characteristics law of roadway surrounding rock under two states of whether the lateral roof collapsed or not were analyzed. The results show
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Stability and Control of Surrounding Rock of a Trapezoidal Roadway Retained with Hard Roof Cutting
Hard roof top-cutting and gob-side roadway retention is an effective way to improve the panel recovery ratio and reduce ground pressure. Based on the condition of Pingmei No.2 Mine, this paper establishes a stability mechanics model for the roof in a ...
Shizhong Zhang +6 more
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Research on the technology of uniformly injecting nitrogen into the porous long pipes in the gob of the gob-side entry retaining mining mode with roof cutting and pressure relief. [PDF]
Sci RepJing Z, Zhou X, Li Y, Bai G, Zhang S.
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In the context where the surrounding rock of deep coal mine roadways is in a complex mechanical environment of “three highs and one disturbance”, mining disturbances are prone to cause instability and damage to the roadways, and the severe deformation of
Jianxi Ren, Chengwei Sun, Kai Su
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According to the engineering geological characteristics and production technology level of Qianyingzi Coal Mine, the stability control technology of surrounding rock of the cutting roof and pressure relief roadway is proposed.
Haitao LI +4 more
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Synergistic mechanism and stability control of gob-side entry retaining by pressure relief and roadside filling in thick coal seams. [PDF]
Sci RepShen F, Rui X, Liu C, Yang J.
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The influence of key parts of hydraulic roof cutting and roof fracture behavior in mining roadway
Dynamic pressure roadway often has problems such as serious deformation of roadway and di-fficult control of surrounding rock. The large deformation of dynamic pressure roadway is usually related to the characteristics of surrounding rock and the stress ...
Yaoyou LIU +3 more
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Design and application study of the key technical parameters of dense drilling for pressure relief in coal mine roofs: a case study. [PDF]
Sci RepMa J, Wang H, Li X, Dong G, Yuan Y.
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