Results 21 to 30 of about 1,626 (149)

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 surrounding rock control technology of roof cutting and pressure relieving for roadside filling in gob-side entry retaining of large mining height panel [PDF]

Scientific Reports
This article takes the transportation channel of the 2507 working face as the engineering background to carry out the analysis of the surrounding rock failure mechanism of the roadside filling in gob-side entry retaining of large mining height panel, and
Lu Weiyong, Li Shengjun, Sun Yaohui, Gao Tao, Mi Wansheng, Zhang Xiaowu   +5 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

Application of pre-splitting blasting roof-cutting pressure relief technology for roadway protection under hard roof [PDF]

Scientific Reports
The 360,606 working face of Xinji 1# Mine was taken as an engineering case to address the significant safety hazards associated with coal mining under hard roof. A key technical scheme for pre-splitting blasting roof-cutting pressure relief was developed by theoretical analysis, numerical simulation, and field experiments.
Li, Yingfu, Chang, Guanfeng, Hu, Di, Song, Wu   +3 more
openaire   +3 more sources

Innovative Control Technique for the Floor Heave in Goaf-Side Entry Retaining Based on Pressure Relief by Roof Cutting [PDF]

Mathematical Problems in Engineering, 2021
To solve the difficulty in controlling floor heave of a retained goaf-side roadway, a new control technique was investigated from the perspective of the pressure relief by roof cutting by combining mechanical analysis, numerical simulation, and engineering tests.
Guangyuan Yu, Jiong Wang, Jinzhu Hu, Daoyong Zhu, Han Sun, Xingen Ma, Wei Ming, Wenfei Li   +7 more
openaire   +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

Research on the Transmission of Stresses by Roof Cutting near Gob Rocks

Energies, 2021
Pressure relief for roadways retained by roof cutting is essentially caused by stress transfer. In this paper, the stress transfer mechanism of 16011 tail entry with roof cutting in Zhaogu No.1 coal mine is studied from the following two aspects: the ...
Zhibiao Guo, Haohao Wang, Zimin Ma, Pengfei Wang, Xiaohui Kuai, Xianzhe Zhang   +5 more
doaj   +2 more sources