Results 21 to 30 of about 543,693 (304)

A New Unified Solution for Circular Tunnels Based on Generalized SMP Criterion considering the Strain Softening and Dilatancy

Advances in Civil Engineering, 2019
According to the strain-softening characteristics of rock mass, an ideal elastic strain-softening model is developed, and the surrounding rock of tunnels is subdivided into the plastic broken zone, plastic strain-softening zone, and elastic zone.
Qifeng Guo, Jiliang Pan, Xinghui Wu, Xun Xi, Meifeng Cai   +4 more
doaj   +1 more source

Extension characteristics of the “Butterfly-shaped” plastic zone and stability control of deep mining roadway in Xingdong mine

矿业科学学报, 2017
The distribution of plastic zone of surrounding rock in deep mining roadway is the key to control the stability of surrounding rock. Taking the deep mining roadway of Xingdong Mine as the research background, according to the "butterfly-shaped" plastic ...
Li Yongen, Guo Xiaofei, Ma Ji, Huo Tianhong, Zhang Hong   +4 more
doaj   +1 more source

Influence Factor of Roadway Surrounding Plastic Zone Under Unequal Stress in Two Directions

Meikuang Anquan, 2020
To study the distribution of surrounding rock plastic zone in roadway under unequal stress in two directions, the south rail lane in 500 m underground 81 mining area of Xutuan Coal Mine is taken as the engineering background.
DONG Hailong, CHEN Rubo, ZHANG Zhao, LIU Dianzhu
doaj   +1 more source

Failure Mechanism for Surrounding Rock of Deep Circular Roadway in Coal Mine Based on Mining-Induced Plastic Zone

Advances in Civil Engineering, 2018
In order to reveal the failure mechanism of the deep roadway under mining-induced pressure in coal mine, the boundary equations for the plastic zone around the deep roadway were deduced, and then the evolution laws for morphology of the plastic zone and ...
Yue Yuan, Weijun Wang, Shuqing Li, Yongjian Zhu   +3 more
doaj   +1 more source

Effect of Principal Stress Field on the Development of Plastic Zone ahead of the Gateroad

Energies, 2020
The distribution of a plastic zone ahead of a gateroad plays a significant role in maintaining the long-term stability of mining spaces. For a long time, the principal stress field such as the values, the direction, etc.
Hongtao Liu, Linfeng Guo, Xidong Zhao, Pengfei Wang   +3 more
doaj   +1 more source

Glial plasticity at nervous system transition zones

Biology Open, 2023
ABSTRACT The central and peripheral nervous systems (CNS and PNS, respectively) are two separate yet connected domains characterized by molecularly distinct cellular components that communicate via specialized structures called transition zones to allow information to travel from the CNS to the periphery, and vice versa.
openaire   +3 more sources

Elastic-plastic analysis of the crack surface vicinity under a pair of anti-plane forces applied at an arbitrary point on the crack surface

AIP Advances, 2018
An elastic-plastic analysis of the mode III crack surface vicinity was performed in an infinitely wide elastic-perfectly plastic plate, in which a pair of anti-plane forces applied at an arbitrary point on the crack surface.
Feng Huang, Zhijian Yi, Qingguo Yang, Yinhua Ma, Xiaobing He, Chaohua Zhao, Jianyi Gu, Ya Li   +7 more
doaj   +1 more source

Experimental Study of the Plastic Zone and Stress Asymmetric Distribution in Roadway Layered Surrounding Rocks

Applied Sciences, 2022
A three-axis experimental simulation model was established for a roadway with layered surrounding rock by a 20 MPa true triaxial analog simulation equipment, and the corresponding layered surrounding rock numerical simulation model was established by ...
Jiaren Chen, Hai Wu, Xuan Zhang, Xu Gao, Tao Ling, Zizheng Zhang   +5 more
doaj   +1 more source

Mode I crack tip fields: strain gradient plasticity theory versus J2 flow theory

, 2019
The mode I crack tip asymptotic response of a solid characterised by strain gradient plasticity is investigated. It is found that elastic strains dominate plastic strains near the crack tip, and thus the Cauchy stress and the strain state are given ...
Fleck, Norman A., Martínez-Pañeda, Emilio   +1 more
core   +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