Results 41 to 50 of about 26,903 (228)

Determination of Narrow Coal Pillar Width and Roadway Surrounding Rock Support Technology in Gob Driving Roadway

Sustainability, 2022
In order to determine the rational width of coal pillars and study the surrounding rock control technology of gob side entry driving with a narrow coal pillar, this paper first calculates the width of narrow coal pillar according to limit equilibrium theory; after that, the lateral support pressure and plastic zone development of the goaf is analyzed ...
Qingliang Chang, Shiguo Ge, Xianyuan Shi, Yesong Sun, Haibin Wang, Mengda Li, Yizhe Wang, Fengfeng Wu   +7 more
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Stability Control Mechanism of High‐Stress Roadway Surrounding Rock by Roof Fracturing and Rock Mass Filling [PDF]

Advances in Civil Engineering, 2021
Large deformation of roadway and coal bump failures have always been the focus in deep underground engineering. By considering the Lu’an mining district in China, the failure mode and stability improvement process of high‐stress roadways were analysed with the field tests and numerical simulations.
Fuzhou Qi, Zhanguo Ma, Dangwei Yang, Ning Li, Bin Li, Zhiliu Wang, Weixia Ma   +6 more
openaire   +2 more sources

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

Study on Failure Characteristics and Rock Burst Mechanism of Roadway Roof under Cyclic Dynamic Load

Shock and Vibration, 2021
Rock burst is a catastrophic phenomenon that often occurs in underground rock mass engineering. In order to reveal the essence of rock burst of a hard roof in the process of roadway excavation, the particle discrete element method is used to establish a ...
Chunmei Zheng, Jiayan Zheng, Xiaojuan Peng, Lei Zhou   +3 more
doaj   +1 more source

Study on failure mechanism and control of surrounding rock of inclined strata crossing roadway in deep coal mine

Frontiers in Earth Science
China’s coal mines are mainly underground mines, and a large number of roadways have to be excavated underground. It is of great significance for coal mine production to adopt safe and reasonable roadway support methods.
Wanwei Fang, Wanwei Fang, Mingxin Li, Peng Huang, Taotao Shi, Yeqiang Chen, Shijin Ma, Guohui Ren   +7 more
doaj   +1 more source

Research on deformation monitoring of surrounding rock based on weak fiber grating sensing technology

Meitan kexue jishu, 2023
The prominent contradiction between high ground stress and low strength of surrounding rock in deep strata of coal mine leads to large deformation and instability disaster after roadway excavation.
Yanhe LI, Zhanbiao YANG, Yuanguang ZHU, Sheng WANG   +3 more
doaj   +1 more source

Research progress of support theory and technology of the roadway surrounding rock based on the plastic zone control

Meitan xuebao
With the increasing depth of coal mining, the stability control of surrounding rock in deep roadway has become one of major problems in the mining field, and the effect of surrounding rock control in deep roadway is directly related to the safe ...
Weijun WANG, Lei FAN, Zhiqiang ZHAO, Sen HAN   +3 more
doaj   +1 more source

Fracture distribution and deformation mechanism of surrounding rock in two-way extremely unequal pressure soft rock roadway

Meitan xuebao
The failure of butterfly plastic zone in roadway surrounding rock is an important reason for the large deformation of roadway surrounding rock. In recent years, it has attracted the attention of roadway support workers.
Weijun WANG, Yujie MA, Lei FAN, Chao YUAN, Hai WU, Xinyu TIAN   +5 more
doaj   +1 more source

Research on Stability Control Technology of Mining Roadway Based on Energy Transformation

Geofluids, 2023
The process of roadway surrounding rock deformation and instability is always accompanied by energy changes, and the energy transformation of surrounding rock directly drives its deformation and failure.
Guohua Zhang, Yanwei Duan, Tao Qin
doaj   +1 more source

Study on fracture parameter calibration and failure characteristics of rock with hole and crack

Deep Underground Science and Engineering, EarlyView.
The SIF and plastic zone equations for a single hole and crack have been derived. The model's failure state leads to the identification of four types of cracks. The plastic zone increases with increased brittleness and decreased crack length. Abstract Cracks within the surrounding rock of roadways significantly affect their stability and failure ...
Shaochi Peng, Wensong Wang
wiley   +1 more source