摘要
根据大量模型试验结果,分析总结了裂隙岩体宏观主断裂发展的特点,并提出了基于“有效应力强度因子”的岩体断裂分析准则,以反映初始损伤的断裂效应。在此基础上,通过双轴压缩荷载作用下圆形洞室围岩断裂行为的有限元分析,研究了岩体初始损伤对洞室围岩稳定的影响。
On the basis of the model test results obtained by the authors, the characteristics of macro-main-crack development in rock mass are analyzed and concluded, and the fracture analysis criteria are proposed based on the concept of effective stress intensity factor to reflect the fracture effect of original macro-damage for rock mass.Then,the influence of rock mass damage on the stability of excavation surrounding rock mass is studied through the finite element analyses of the fracture behaviour of the surrounding rock mass around a circular excavation under biaxial compression.
出处
《石家庄铁道学院学报》
1994年第3期23-30,共8页
Journal of Shijiazhuang Railway Institute
基金
国家自然科学基金资助
关键词
损伤
断裂
岩体
围岩稳定
kiamage
fracture
rock mass
stability of excavation surrornding rock mass
