Results 71 to 80 of about 1,626 (149)

Study of Gob-Side Entry Retaining Technology with Roof Cutting under Upper Roadway Condition

, 2021
Gob-side entry retaining technology with roof cutting (GERRC) has been widely used in flat and near-flat coal seam conditions, but its application under inclined coal seam is still very deficient.
Manchao He, Enze Zhen, Xingen Ma, Jianfeng Li, Gang He, Xuewei Sun   +5 more
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Mechanism and control technology of roof cutting induced pressure relief in gob-side entry retaining with roadside backfill under thick coal seam conditions [PDF]

To address the challenges of large deformation and stability control in filled gob-side entry retaining in thick coal seams, takeing the N3-13 working face as the engineering background.
Junjun JIANG, Hainan GAO, Zhijun ZHAO, Fuxin SHEN, Guanghui HE, Yufei TIAN, Zhibin ZHOU, Haonan LI, Shankun ZHAO   +8 more
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Mechanics Principle and Implementation Technology of Surrounding Rock Pressure Release in Gob-Side Entry Retaining by Roof Cutting

, 2022
Improving coal resource mining rates has long been a focus of coal industry research. The gob-side entry retaining by roof cutting (GERRC) is a new coal mining technology that has gained popularity in China due to its high mining rate and safety.
Chuanhao Xi, Wenshuai He, Zhen Zhu, Hongping Yuan, Mingqing Du   +4 more
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Research on the Key Technology of Gob-Side Entry Retaining by Roof Cutting for Thick and Hard Sandstone Roofs

, 2022
In order to ensure the application of gob-side entry retaining by roof cutting for thick and hard sandstone roofs, the key technology of pre-split blasting was studied.
Eryu Wang, Qian Li, Yilong Wang, Yongyuan Li, Chaowen Hu, Xingfeng Sha   +5 more
core   +1 more source

Principle and practice of hydraulic softening top-cutting and pressure relief technology in weakly cemented strata

Frontiers in Earth Science
Extremely thick and hard roofs are difficult to break in the mining of a working face, and the large area of the suspended roof easily induces a strong ground pressure or dynamic impact disasters.
Tao Wang, Guoyao Xu, Liyuan Liu, Chaoqiang Bai, Weiwei Ye, Lihui Sun   +5 more
doaj   +1 more source

The technology of gob-side entry retaining supported by flexible formwork wall with roof cutting and pressure relief for composite roof in deep mine

Gong-kuang zidonghua, 2021
In Lianghuai area of China, due to the influence of the large buried depth of the mine and the complicated roof conditions, when gob-side entry is retained, the roof deformation of the gob-side entry retaining is large, the coal side is easily extruded and the floor heave is serious.
SHEN Binxue1,2, ZHOU Hongfan3, ZHU Lei1,2, WU Yuyi1,2, QIU Fengqi1,2, WANG Guopu3, GUO Lin3, HUANG Jianbin1,2   +7 more
openaire   +1 more source

Study on the stress migration law and theoretical model of the stope roof under roof-cutting conditions

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
To improve coal recovery and mitigate high-stress hazards in deep mining, the roof cutting and pressure relief mining (abbreviated as “RCPR”) without coal pillars has been widely implemented in Chinese coal mines.
Shuailong Feng, Xiangjun Chen, Lin Wang, Yibo Li   +3 more
doaj   +1 more source

Mechanism of Water Inrush Induced by Gob Water Under Repeated Mining and Control Technology Based on Roof Cutting Pressure Relief

To mitigate the threat posed by accumulated gob water to underlying coal seams during multi-seam mining, this study investigates the mechanism of water inrush induced by repeated mining and its control through roof cutting pressure relief.
Guochuan Zhang, Yongqiang Zhang, Xiangyu Wang, Xian Wang, Dingchao Chen, Yuan Chu   +5 more
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Surrounding rock control technology of preparation roadway under double-wing mining

Meitan kexue jishu
Aiming at the problem of surrounding rock instability and serious deformation and failure of the preparation roadway in the double-wing mining area, which is affected by the mining superimposed support stress, the stress control technology of the ...
Kun WANG, Xiangrui MENG, Guangming ZHAO, Xiang CHENG, Minjie QI, Shikui ZHU   +5 more
doaj   +1 more source

Engineering Practice of Inclined Longwall Roof Cutting and Pressure Relief Gob‐Retaining Roadway Technology in Feitian Coal Mine

To address the issues of tight mining‐excavation scheduling and challenging gas management in coal mines, this study proposes a technical scheme for inclined longwall roof cutting and pressure relief pillarless mining.
Xianbi Xu, Yuankun Zhu, Jun Huang, Zhenqian Ma   +3 more
core   +1 more source