摘要
为探究侧压系数对巷道稳定性的影响,利用有限差分数值计算软件研究了应力场中侧压系数对围岩应力场分布、巷道变形和塑性区分布的影响。结果表明,在λ<1时,围岩应力集中于巷道两帮,巷道变形不大,塑性区随着λ的增大而减小;在λ>1时,围岩应力由两帮向顶底板转移,并且随着λ的增大向围岩深部扩展,顶板变形量远小于底板和侧帮变形,塑性区在顶底板扩大而两帮变化较小;将淮北矿区海孜矿地应力实测结果和巷道变形破坏情况与数值模拟得出的规律进行对比,两者基本一致。
In order to investigate the lateral pressure coefficient on roadway stability,the finite difference numerical simulation software was used to study the lateral pressure coefficient in stress field,as well as its influence on the stress distribution of surrounding rock,roadway deformation and the plastic zone distribution.Results showed that ifλ1,the surrounding rock stress was concentrated on the two sides of roadway with small deformation,and the plastic zone decreased with the increase ofλ.Whenλ1,the surrounding rock stress transferred from the two sides to the roof and floor,and then extended to the deep surrounding rock with the increase ofλ.The deformation of roof was far less than floor and two sides of surrounding rock,and the plastic zone expanded in the roof and floor but had little change in the two sides of roadway.Compared with the insitu observed results and actual roadway deformation of Haizi mine in Huaibei mining area,the results of numerical simulation were basically identical.
出处
《矿业研究与开发》
CAS
北大核心
2015年第10期51-54,共4页
Mining Research and Development
基金
国家重点基础研究发展计划(973计划)项目(2013CB227900)
国家自然科学基金面上项目(51474215)
关键词
侧压系数
巷道围岩
应力分布
塑性区
Lateral pressure coefficient
Surrounding rock of roadway
Stress distribution
Plastic zone
