Results 21 to 30 of about 3,345,704 (190)

Feasibility Study on Roof Cutting and Pressure Relief Technology of Gob-side Wall Retaining in Large Mining Height Working Face

Meikuang Anquan, 2020
To solve the problem of large deformation of concrete wall caused by large bearing capacity of gob-side wall retaining in large mining height working face, the concrete bearing structure of gob-side brick retaining was determined for the site conditions
SHEN Hao, ZHANG Baisheng, HE Xin
doaj   +2 more sources

Stability Control of a Roadway Surrounding Rock during the Cutting and Pressure Relief of a Coal-Bearing Roof at a Shallow Mining Depth

Geofluids, 2022
Recent years have seen the widespread use of a new gob-side entry retaining technology, namely, automatic roadway forming based on roof cutting and pressure relief.
Chen Tian, Yingjie Liu, Hezhuang Lou, Tinggui Jia   +3 more
doaj   +2 more sources

Research on Key Parameters for Relieving Pressure on Roofs of Deep Mine Cutting and Retaining Roadways

Applied Sciences
Scientific and reasonable roof-cutting parameters are key to ensuring pressure relief of the retained roadway roof. This manuscript takes the 7135 working face of Qidong Coal Mine as the engineering background and uses theoretical analysis, numerical and
Xiao Liu, Yuntao Liang, Xinzhu Hua, Xinlin Qin   +3 more
doaj   +2 more sources

Stability mechanisms of soft rock mining roadways through roof cutting and pressure relief: an exploratory model experiment [PDF]

Frontiers in Ecology and Evolution, 2023
IntroductionSoft rock mining roadways are severely deformed and damaged during coal mining. Blindly increasing the support strength not only has little effect but also wastes material resources.MethodsMaintaining the original support parameters, model experiments were conducted to investigate the mechanism of pressure relief protection of the front ...
Qingwen Zhu, Tingchun Li, Qingnan Lou, Yishuai Liu, Chunping Li, Jiangang Chen   +5 more
openaire   +3 more sources

Study on deformation law of surrounding rock of gob side-entry retaining by roof cutting and pressure relief

Meikuang Anquan, 2022
The severe mining pressure of surrounding rock along goaf retaining roadway has become the bottleneck of safe and efficient production of coal mine.
LYU Weibin, LU Kai, REN Zhuoxin, LIAN Qiang   +3 more
doaj   +2 more sources

Study on Key Parameters of Roof Cutting and Surrounding Rock Control Technology for Gob-Side Entry Retaining in Fully Mechanized Top Coal Caving Mining of Thick Coal Seams

Applied Sciences
In thick coal seam conditions, the surrounding rock deformation in the longwall mining faces’ along-the-goal roadway is severe, and the support strength struggles to meet roadway retention requirements.
Menglong Zha, Chong Li, Yadong Zheng, Huan Xia, Menghu Sun, Shuaishuai Jiang   +5 more
doaj   +2 more sources

Pressure-relief technique and its application based on seam-cutting compensation in high-stress roadway [PDF]

Meitan xuebao
As the underground coal mining activities become deeper and more intensive, the ground pressure on roadway has become a significant issue hindering the safe and efficient development of coalmines.
Xingyu ZHANG, Jun YANG, Yubing GAO, Haojie XUE, Pengfei GUO, Manchao HE   +5 more
doaj   +2 more sources

Study on Key Parameters of Hard Roof Cutting and Pressure Release and Roadway Retaining in Medium Thick Coal Seam

Meikuang Anquan, 2020
Based on the engineering geological conditions of the hard roof of the medium thick coal seam in Dadougou Coal Mine, in order to implement the non-pillar mining technology of roof cutting and pressure release, the key parameters of roof cutting and ...
LIU Dajiang, XU Xuhui, ZHU Hengzhong, OUYANG Feng
doaj   +2 more sources

Deep-hole blasting roof cutting technology for pressure relief in the final mining phase of the working face: a case study

Frontiers in Earth Science
In the final mining phase of the working face, a large area of suspended roof can lead to stress concentration from mining-induced stress, which in turn causes deformation and instability of the main roadway. This study takes the Ji-17-21080 working face
Baomin Liu, Dingchao Chen, Changtao Xu
doaj   +2 more sources

Lateral Structure of Multi-Layer Thick Hard Roofs and Hydraulic Roof-Cutting Pressure Relief in Xiao Jihan Mine

Applied Sciences
This study aims to address the pronounced stress concentration in roadway-surrounding rock under conditions of multiple thick and hard roof strata at Xiao jihan coal mine, China. The work was carried out on the 13216 working mining face as the engineering background.
Hui Liu, Lichuang Chen, Xufeng Wang, Hui Gao, Chenlong Qian, Xuyang Chen   +5 more
openaire   +2 more sources