渗流作用下非均匀应力场巷道围岩稳定性分析  

Surrounding Rock Mass Stability Analysis of Non-uniform Stress Field Under the Action of Seepage

作　　者：孙珍平[1] 高召宁[1] 孟祥瑞[1] 

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南232001

出　　处：《煤矿安全》2013年第1期193-196,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51074003);国家自然科学基金委员会与神华集团有限公司联合资助项目(51174255);高等学校博士学科点专项科研基金项目新教师类(20093415120001);安徽省优秀青年科技基金资助项目(10040606Y31);中国博士后科学基金项目(2011M501037);淮南市科技计划资助项目(2011A07921)

摘　　要：将巷道围岩视为多孔介质,考虑地下水渗流作用的影响,应用弹塑性理论,分析了非均匀应力场圆形巷道围岩的力学性态,推导出了非均匀应力场下圆形巷道弹塑性的解析解,基于Mo-hr-Coulumb强度准则,得出了渗流作用下巷道围岩的塑性区边界线方程,并通过具体实例,对比分析了当λ=0.5时渗流作用对应力场的径向应力与切向应力在巷道两帮和顶底板的分布情况。研究表明,考虑渗流作用,对应力场的影响作用更为显著。As porous medium, rocks are affected by ground water permeation. Elasto - plastic theory is used to analyze mechanical be- haviors of the non - uniform stress field of circular tunnels and the circular tunnels elasto - plastic theoretical solution of non - uniform stress field is deduced. Base on the Mohr - Coulumb failure criterion, the boundary line equation of surrounding rock mass plastic zone under non - uniform stress field on the action of seepage is deduced. Through comparing whether the stability of surrounding rock was under the action of seepage or not, it obtains that the influence of seepage field on stress field is more intensive than without considering seepage when side pressure coefficient is 0＇. 5. The study demonstrates that the influence of seepage field on stress field is intensive.

关 键 词：渗流 非均匀应力场 圆形巷道 围岩稳定性 塑性区边界线方程 

分 类 号：TD322[矿业工程—矿井建设]