煤矿安全2017，Vol.48Issue(11)：217-221,5.DOI:10.13347/j.cnki.mkaq.2017.11.058
双向不等压圆形巷道围岩塑性区理论分析及数值模拟
Theoretical Analysis and Numerical Simulation on Plastic Zone in Circular Tunnel Under Bidirectional Non-uniform Stress Field
张纯旺 1宋选民 1王伟 1张玉江 2杨世力1
作者信息
- 1. 太原理工大学采煤工艺研究所,山西太原030024
- 2. 太原理工大学矿业工程学院,山西太原030024
- 折叠
摘要
Abstract
According to the stress of a circular hole in elastic-plastic mechanics and using Mohr-Coulomb strength criterion,we deduced the boundary equations of circular roadway plastic zone in uneven stress field.From the perspective of theoretical analysis and numerical simulation,and compared and analyzed the effect on the distribution of the circular roadway plastic zone under the factor of lateral pressure coefficient,rock lithology and tunnel radius.The results show that under the non-uniform stress field,the lateral pressure coefficient has more influence on the shape and distribution of plastic zone,the plastic zone size of the larger load direction is smaller than that of the smaller load direction;the harder of the roadway rock,the smaller of the range of plastic zone;when the surrounding rock is weak rock,the plastic zone is approximate butterfly distribution,and when the surrounding rock is harder rock,the plastic zone distribution is approximate elliptic.The influence of roadway excavation on the distribution range of the plastic zone of surrounding rock is larger;at the same angle,the radius of plastic zone is linear increase with the increase of tunnel radius.关键词
圆形巷道/围岩塑性区/数值模拟/理论分析/FLAC3D/巷道支护/围岩控制Key words
circular roadway/plastic zone/numerical simulation/theoretical analysis/FLAC3D/roadway support/surrounding rock control分类
矿业与冶金引用本文复制引用
张纯旺,宋选民,王伟,张玉江,杨世力..双向不等压圆形巷道围岩塑性区理论分析及数值模拟[J].煤矿安全,2017,48(11):217-221,5.
