巷道围岩应力空间分布仿真分析  

Simulation Analysis of Spatial Distribution of Roadway′s Surrounding Rock Stress

作　　者：唐治[1] 潘一山[1] 李忠华[1] 王丽[2] 

机构地区：[1]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [2]辽宁工程技术大学机械工程学院,辽宁阜新123000

出　　处：《土木建筑与环境工程》2014年第3期37-43,共7页Journal of Civil,Architectural & Environment Engineering

基　　金：国家重点基础研究发展计划(973计划)(2010CB226803);国家自然科学基金(11172121;51174107)

摘　　要：为得出巷道围岩应力空间分布特征,以圆形断面巷道为例,采用复变函数方法得出其应力解,并把映射空间解转化为巷道所在空间解后对巷道周围岩体应力场进行仿真分析,得出了巷道周围岩体应力场分布直观图,可方便直观的了解巷道围岩任意位置应力分布情况。并考虑不同半径、不同侧压系数对围岩应力场的影响,得出了:圆形巷道围岩应力峰值及其出现方向与半径无关;侧压系数小于1/3时,顶底板开始产生拉应力,大于3时两帮围岩开始产生拉应力;以及环向、径向、剪切应力及最大、最小应力的变化规律。To get the spatial distribution characteristic of roadway＇s surrounding rock stress, circular section roadway was taken as a case study. The solution of stress was got by using complex function method, and roadway＇s surrounding rock stress field was analysed after the solution of mapping space was transformed into the solution of roadway space. As a result, the visual diagram of stress field distribution of roadway＇s surrounding rock was obtained, which could describe intuitively stress distribution of roadway＇s surrounding rock at any position. Considering the influence of different radius and side pressure coefficients on surrounding rock stress field, the following conclusions have been obtainded, the peak value and direction of circular roadway＇s surrounding rock stress has nothing to do with the radius; when side pressure coefficient is less than 1/3,the roof can produce tensile stress; when side pressure coefficient is more than 3, the surrounding rock in two sides can produce tensile stress. And the change rule of hoop stress, radial stress, shear stress and the maximum and minimum of stress have also been generated.

关 键 词：圆形巷道 复变函数 应力空间分布 计算仿真 

分 类 号：U451[建筑科学—桥梁与隧道工程]