Mechanics Method of Evaluating Rock Stability in Underground Engineering
Strength Reduction Method was present when people study on the stability of slopes. R is a limit equilibrium method. In this paper, the strength reduction method has been firstly developed to analyze the stability of underground engineering. The safety coefficient has classified and in the meanwhile through the practice, a new failure criterion is proposed. Based on the failure process, local safety coefficient and whole safety coefficient have been defined separately. In addition, according to the property of the forces on the object, the safety coefficient can also be classified into tensile safety coefficient, shear safety coefficient and comprehensive safety coefficient in tension and shear. Furthermore, the strength reduction system of rock failure process analysis (RFPA-SRM) is used to evaluate the stability of double areh-tunoel, calculate every kind of safety coefficient in various situations and Compare the calculated result with the similar physical experimental results. All examples have been computed and the result demoustrates that RFPA-SRM is much more effective to evaluate the stability of tunnel, which is a new evaluating method to apply and extend for underground rock and soil projects.
strength reduction method safety coefficient underground cavity stability failure criterion
MA Tianhui TANG Chunan LIANG Zhengzhao LI Lianchong ZHANG Yongbin
Center for Rock Instability and Seismicity Research,Dalian University of Technology,Dalian 116024,Liaoning,China
国际会议
The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)
北京
英文
2134-2137
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）