Results 201 to 210 of about 139,565 (215)

Model test of extreme deformation and failure mechanism of automatically formed roadway under thick-hard roof

Engineering Failure Analysis
Zhibo Ma, Zhibiao Guo, Jingwei Gao, Yuanxin Zhao   +3 more
openaire   +3 more sources

Study and Application of Gob-Side Entry Retaining Formed by Roof Cutting and Pressure Relief in Medium-Thickness Coal Seam with Hard Roof

Geotechnical and Geological Engineering, 2020
The technology of gob-side entry retaining by roof cutting can release mining pressure and reduce the deformation of roadway surrounding rock. In order to solve the problem of the hard roof of the Baoshan Coal Mine being under intense pressure and the effect of the retaining roadway being poor, a field test of directional presplitting blasting for the ...
Xiaojie Yang, Yue Sun, Eryu Wang, Wenbin Mao   +3 more
openaire   +1 more source

Physical model experiment and numerical analysis on innovative gob-side entry retaining with thick and hard roofs

Arabian Journal of Geosciences, 2020
Gob-side entry retaining is a common method in underground coal mining. Conventional gob-side entry retaining (CGER) always causes stress concentration and large deformation around roadways under the condition of thick and hard sandstone roofs. Thus, an innovative method of no pillar gob-side entry retaining (NPGER) in longwall mining is proposed in ...
Xiaoming Sun, Chengwei Zhao, Gan Li, Bo Zhang, Junwei Wang, Feng Cai   +5 more
openaire   +1 more source

Moment Tensor and Stress Field Inversions of Mining-Induced Seismicity in A Thick-Hard Roof Zone

Rock Mechanics and Rock Engineering, 2023
Chun-Hui Song, Cai-Ping Lu, Hai-Quan Liu, Jie-Fang Song, Cheng-Yu Liu, Hua-Wei Cui, Jin-Rui Zhang   +6 more
openaire   +1 more source

Comprehensive roof cutting, pressure relief, and energy absorption anchorage control for mining roadways with extremely thick and hard roofs

Tunnelling and Underground Space Technology
Zhenhua Jiang, Xuebin Gu, Hengbin Chu, Shitong Chen, Yukun Ma   +4 more
openaire   +1 more source

Fracture analysis of double-layer hard and thick roof and the controlling effect on strata behavior: A case study

Engineering Failure Analysis, 2017
Lishuai Jiang, Ning Jiang, Xuesheng Liu
exaly  

Innovative pillar recovery method integrating gob-side entry driving and directional roof-cutting for thick-hard roof coal seams

Journal of Central South University
Yi-yi Wu, Qiu-cheng Ye, Yu-bing Gao, Xing-xing Zhang, Man-chao He   +4 more
openaire   +1 more source

Numerical simulation study on hard-thick roof inducing rock burst in coal mine

Journal of Central South University, 2016
Jiang He
exaly  

A Case Study of Effective Support Working Resistance and Roof Support Technology in Thick Seam Fully-Mechanized Face Mining with Hard Roof Conditions

Sustainability, 2017
Wei-bin Guo
exaly  

Weakening effects of hydraulic fracture in hard roof under the influence of stress arch

International Journal of Mining Science and Technology, 2018
Xuan Zhang
exaly