Results 51 to 60 of about 1,626 (149)

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

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

Analysis of Roof Deformation Mechanism and Control Measures with Roof Cutting and Pressure Releasing in Gob-Side Entry Retaining

, 2021
The mechanical model of the basic roof fracture structure is established on the basis of key block theory to study the roof breaking mechanism of gob-side entry retaining under roof cutting and pressure relief, and the analytical formula of roof support ...
Chengxing Zhao, Yan Zhang, Kai He, Xin-Zhu Hua, Jiadi Yin, Bing-Jun Sun, Yingfu Li   +6 more
core   +1 more source

Coal Pillar Stress Weakening Technology and Application by Gob-Side Entry Driving and Hydraulic Roof Cutting in Deep Shafts Mines

, 2022
To solve the problems of serious deformation and support difficulty of deep and narrow gob-side coal pillars, an optimized hydraulic roof cutting structural model for the roof structure of narrow gob-side coal pillars in kilometer–deep shafts was ...
Zhi Zhang, Shang Yang, Jun Wang, Ruyu Yan, Guoqing Sun, Jianguo Ning, Kun Wang, Minghao Du   +7 more
core   +1 more source

Width of small coal pillars and control of pressure relief by roof cutting in roadway excavation along goaf under thick coal seam

Gong-kuang zidonghua
The reservation of small coal pillars in roadway excavation along goaf under deep mining conditions of thick coal seams is an effective way to reduce resource loss caused by wide coal pillar protection.
LIU Peng, WEI Jinkai
doaj   +1 more source

A Composite Pressure Relief Method Based on Roof Cutting and Fracturing Expansion for Thick Hard Roofs in Large Mining Heights

International Journal of Geomechanics
Abstract In coal mining, thick and hard roof strata are widely distributed, posing significant hazards that easily lead to various issues such as extensive deformations of the surrounding rock and failure of support systems due to strong mining pressure, resulting in frequent safety incidents.
Jun Yang, Hongxu Song, Yubing Gao, Qiang Fu, Jianning Liu, Yuxuan Liu, Hongyu Jin   +6 more
openaire   +1 more source

Large deformation control methods for roadways in thick coal seams with high mining height and hard roof

Gong-kuang zidonghua
For the control of surrounding rock in thick coal seams with high mining heights and hard roofs, the traditional roadway layouts employing coal pillars often induce strong strata behavior, resulting in large deformations, rock bursts, and other ...
WANG Shaowei, NI Xuening, XU Jingshuai, LI Yayun, WANG Yunfeng, LI Yahui   +5 more
doaj   +1 more source

Influence of roof cutting parameters on stability of surrounding rock of gob-side entry retaining

矿业科学学报, 2022
As one of the core issues of roof cutting pressure relief gob-side entry retaining technology, roof cutting parameters have a great influence on the stability of surrounding rock.Taking the 1226 working face of Shuguang Mine as the engineering background,
Sheng Fengtian, Zhang Yong, Wei Wensheng, Duan Yuqing, Mao Kaibin   +4 more
doaj   +1 more source

Research on Roof Cutting and Pressure Relief Technology of Deep Hole Pre-cracking Blasting

International Journal of Energy
The dynamic pressure gob-side entry is affected by the whole mining process of the working face, and the cause of the large deformation is the additional stress generated during the rotary sinking process of the key block. Therefore, in order to alleviate the deformation of surrounding rock of roadway along goaf.
Jilong Qin, Peng Zhu
openaire   +1 more source