Title of Paper:Mechanics Method of Evaluating Rock Stability in Underground Engineering

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Date of Publication:2008-01-01

Included Journals:CPCI-S

Volume:7

Page Number:2134-2137

Key Words:strength reduction method; safety coefficient; underground cavity; stability; failure criterion

Abstract:Strength Reduction Method was present when people study on the stability of slopes. It 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 arch-tunnel, 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 demonstrates 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.