Results 21 to 30 of about 1,488 (167)

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, Xingjie Yao, Xiangyu Wang, Sen Yang, Yuantian Sun   +4 more
openaire   +2 more sources

Study on Surrounding Rock Stability Mechanism of Gob-Side Entry Retaining with Prefabricated Fracture

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
doaj   +1 more source

Numerical simulation analysis of pressure relief effect under the combined action of horizontal slotting and roof fracturing

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
doaj   +1 more source

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   +1 more source

Research progress in roof cutting and pressure relief technology and its effect evaluation in deep coal mines

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, HE Ke, FU Qiang, WANG Tong, WEI Jiale, WU Xianghui   +5 more
doaj   +1 more source

Application of Presplitting Blasting Technology in Surrounding Rock Control of Gob-Side Entry Retaining with Hard Roof: A Case Study

Advances in Materials Science and Engineering, 2021
Through the analysis of the mining situation and geological data of Qidong mine and working face, the key factors affecting the roof cutting and pressure relief roadway retention along the goaf are defined.
Shuang Gong, Yi Tan, Yunpeng Liu, Dan Zhu, Yang Yu   +4 more
doaj   +1 more source

Study on optimization of roof cutting parameters for synergy between stope stability and roadway pressure relief in deep-buried thin bedrock

Meikuang Anquan
To investigate the influence of roof cutting and pressure relief on the stability of overlying strata and roadway surrounding rock in deep-buried thin bedrock stope, and to realize the collaborative control of stope stability and roadway surrounding rock
Wenwei Wang, Wenhui Zhang, Mingtao Wang, Gangwei Fan, Shizhong Zhang, Dongsheng Zhang, Zhanglei Fan, Xinyao Gao, Chuangnan Ren   +8 more
doaj   +1 more source

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   +1 more source

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   +1 more source

Study on optimization of key parameters of thick hard roof cutting and retaining roadway in inclined coal seam

Meitan kexue jishu
To address stress concentration in mining roadways, particularly in the inclined, thick, and hard roof, and lessen the impact of sudden overlying strata collapse, a comprehensive study was conducted on the 1301N transport roadway in No.6 Great Wall Mine.
Weiping SHI, Zhaoying LI, Changtao LIU, Yanwei LYU, Haoran ZHANG, Tao YANG   +5 more
doaj   +1 more source