摘要
采用统一强度理论对岩体中圆形竖井的稳定性进行了研究。导出了竖井稳定性的判据和极限深度的算式,利用所得的公式探讨了岩体的拉压强度差效应和中间主应力效应对竖井极限深度的影响。结果表明,当考虑岩体的拉压强度差效应和中间主应力效应时,竖井的极限深度将明显提高。
On the basis of the unified strength theory,a stability analysis of a circular shaft was carried out.The stability criterion and the formula for the limit depth of the shaft were obtained.The influences of the strength-differential effect and the intermediate principal stress effect on the limit depth of the shaft were investigated by the present formula.The results show that the limit depth of shaft will increase when the strength-differential effect and the intermediate principal stress effect are considered.
出处
《地下空间与工程学报》
CSCD
2007年第6期1168-1170,1181,共4页
Chinese Journal of Underground Space and Engineering
关键词
岩石力学
稳定分析
极限深度
竖井
统一强度理论
rock mechanics
stability analysis
limit
shaft depth
the unified strength theory
