Results 21 to 30 of about 6,644,658 (260)

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
doaj   +1 more source

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
doaj   +1 more source

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

Study on bearing capacity characteristics of steel structure support in soft rock roadway

Energy Science & Engineering, 2021
When the soft rock roadway in underground mine is supported by steel frame, the bearing capacity of steel structure is the key to the success of roadway support.
Ya‐bin Wu, Jian‐hua Hu, Xu‐yang Zhang, Ya‐guang Qin, Zhi‐bo Zhang, Xing‐chang Zhao   +5 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

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

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
doaj   +1 more source

Instability evolution mechanism and collaborative control technology of high-stress fractured roadways

Meitan kexue jishu
Addressing the support challenges of roadways with high-stress broken roofs during mining in the lower slice of thick coal seams. Taking the upper entry of the 14022 working face in Zhaogu No. 2 Mine as the engineering background, a roof mechanical model
Zhen Hao, Linfeng Guo, Jin Ban, Qiang Yao, Pengfei Wang, Xinlei Li, Yue Ji, Shuang Wu   +7 more
doaj   +1 more source

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