Results 21 to 30 of about 8,123 (220)

Stabilization of Rock Roadway under Obliquely Straddle Working Face

Energies, 2021
A floor rock roadway under an oblique straddle working face is a typical dynamic pressure roadway. Under the complex disturbance of excavation engineering works, the roadway often undergoes stress concentration and severe deformation and damage. To solve
Peng Wang, Nong Zhang, Jiaguang Kan, Bin Wang, Xingliang Xu   +4 more
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Analysis on deformation and failure of Jijianao ventilation shaft roadway and supporting countermeasures

Meikuang Anquan, 2021
In order to solve the problem of large deformation of Jijianao ventilation shaft roadway in Xinyuan Mine, the nature of the surrounding rock of the ventilation shaft roadway was studied. The deformation and failure mode of the roadway was systematically
YANG Yong
doaj   +1 more source

Deformation Characteristics and Control Technology of Roadway in Water-Rich Soft Rock

Geofluids, 2022
Jurassic soft rocks are the main coal-bearing strata in western mining areas, which are rich in water and high in expansive minerals. The roof and floor of the coal seam are easily muddied and disintegrated when affected by water, and heave floor of ...
Weiguo Lin, Jianliang Cheng, Dalei Li, Haibo Dang   +3 more
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Design and numerical simulation analysis of guide support scheme for underground roadway

Meikuang Anquan, 2022
In order to effectively control the deformation and instability of roadway strike, a partial guide inclined long bolt support scheme is proposed. Through the theoretical analysis of the stress transfer process in the direction of roadway, the mechanical ...
FANG Juejing, YANG Ke, LYU Xin
doaj   +1 more source

Numerical Study on the Impact Instability Characteristics Induced by Mine Earthquake and the Support Scheme of Roadway

Shock and Vibration, 2021
Rockburst of deep roadway was induced by the superposition of mine earthquake disturbance and high static stress exceeding the limit strength of coal-rock mass. To study the roadway impact instability characteristics caused by mine earthquake disturbance
Guang-jian Liu, Shan-lin Li, Zong-long Mu, Wen Chen, Lei-bo Song, Jie Liu, Yu-dong Xu   +6 more
doaj   +1 more source

Roof collapse mechanism and key control technology and equipment for mining-affected in coal mines

Meitan xuebao
In response to the challenges posed by complex surrounding rock conditions, high mining intensity, and significant strata pressure in coal mine mining-induced roadways—which often result in dynamic pressure phenomena such as roof collapse and large ...
Weijun WANG, Zhiqiang ZHAO, Housheng JIA, Pandong ZHANG, Nianjie MA   +4 more
doaj   +1 more source

Mechanical properties and damage evolution mechanisms of polyurethane grouting materials for roadway reinforcement

Case Studies in Construction Materials
Chemical grouting reinforcement technology is a crucial method for enhancing the stability of roadway surrounding rock. This study focuses on a novel polyurethane-based composite polymer grouting material, systematically analyzing the mechanical response
Zijun Han, Hongtao Liu, Qinyu Liu, Jialu Liang, Xiaofei Guo, Yang Chen, Zhen Hao, Qiang Yao   +7 more
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Damage evolution and failure warning in early-age flexible-formwork concrete for underground support

Geohazard Mechanics
The evolution law of mechanical properties and damage characteristics of early-age flexible formwork filling concrete have a decisive influence on the stability control of surrounding rock of large deformation roadway.
Zijun Han, Hongtao Liu, Xiaofei Guo, Jialu Liang, Zhongjin Qiao, Chenxiao Cao, Lei Guo, Xiaogang Chen   +7 more
doaj   +1 more source

Design of roadway advanced support and study on its mechanical characteristics

Gong-kuang zidonghua, 2019
In view of problem that there is a big difference between calculated load and real load when roof load is estimated or thin plate theory model is used to study mechanical characteristics of advanced support at present, a new type of roadway advanced ...
YANG Xinshun, YANG Zhiqiang
doaj   +1 more source

Robotized advance support scheme and optimum support opportunity for deep fully mechanized roadway

矿业科学学报, 2019
The fully mechanized excavation working face is the accident-prone area,such as the roof collapse and the rib spailling.With the increase of coal mining depth,the problem becomes more obvious,which seriously threatens the personal safety of coal miners ...
Xue Guanghui, Cheng Jijie, Guan Jian, Li Xiuying, Wu Miao   +4 more
doaj   +1 more source