详细信息
Elastic-plastic analysis of rock surrounding a circular roadway considering plastic hardening and dilatancy characteristics ( SCI-EXPANDED收录)
文献类型:期刊文献
英文题名:Elastic-plastic analysis of rock surrounding a circular roadway considering plastic hardening and dilatancy characteristics
作者:Li, Peng Zhou, Ze Xu, Youlin Zhu, Yongjian Zhou, Bo Sun, Changlun Wang, Xianqing
第一作者:李鹏
通信作者:Zhou, Z[1]|[14440a6c3eba2d9627e66]周泽;[14440ce227834bac05f8b]周泽;
机构:[1]Guizhou Inst Technol, Sch Min Engn, Guiyang 550003, Guizhou, Peoples R China;[2]Hunan Univ Sci & Technol, Work Safety Key Lab Prevent & Control Gas & Roof D, Xiangtan 411201, Hunan, Peoples R China
第一机构:贵州理工学院矿业工程学院
通信机构:corresponding author), Guizhou Inst Technol, Sch Min Engn, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院矿业工程学院;贵州理工学院;
年份:2025
卷号:15
期号:1
外文期刊名:SCIENTIFIC REPORTS
收录:;Scopus(收录号:2-s2.0-105007241554);WOS:【SCI-EXPANDED(收录号:WOS:001503070400037)】;
基金:The authors gratefully acknowledge the financial support from the Guizhou Science and Technology Support Program Project (Qiankehe Support [2021] General 347).
语种:英文
外文关键词:Plastic hardening; Expansion characteristics; UST criterion; Expansion coefficient; Elastic-plastic
摘要:Excavation of deep roadways induces plastic failure of the surrounding rock, resulting in roof caving and uncoordinated large deformation, which seriously threatens support safety and production efficiency. A four-stage stress-strain model of the elastic zone-plastic zone-softening zone-fracture zone of the surrounding rock in a deep roadway is established to analyze the range of the roadway fracture zone. The model considers the unified strength criterion, the nonassociated flow rule, and the influence of the intermediate principal stress and dilatancy coefficient. Based on this model, closed solutions for the stress, strain and deformation of the surrounding rock are obtained. Results show that an increase in the value of the strength parameter b can reduce the tangential stress sigma theta on the surface of the roadway but increase the values of sigma theta and sigma r at the plastic-flow interface. The peak value of sigma theta increases with increasing b value. Both the tangential strain epsilon theta and radial strain epsilon r decrease with increasing strength parameter b, and the radial displacement ur decreases with increasing b. With the increase of initial cohesion, the post-peak failure range of surrounding rock shows a nonlinear increase, With the increase of residual cohesion, the post-peak failure range of surrounding rock shows a nonlinear decrease. The dilatancy coefficient eta i is positively correlated with the b value and the dilatancy angle psi i, revealing that the surrounding rock with high dilatancy is more prone to volume expansion instability. The research results provide a theoretical basis and quantitative parameter support for stability evaluation and differential support design of deep roadways.
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