Abstract：Theory of structure stability was applied for the problems of rock mechanics. Two simple models were adopted for the analysis of reversed fault earthquake and rockburst during shaft excavation，and their analytical solutions were obtained. The equilibrium path curve for the shaft excavation links the non-dimensional displacement with the pressure of borehole wall，while the equilibrium path curve for the reversed fault earthquake links the non-dimensional displacement at far-field with the constrained force. The instability of the rock structures was described as the instability at the point of maximum value. The rockbursts and reversed fault earthquake are two different kinds of instabilities. The rockburst during the shaft excavation is the instability occurred at the maximum stress and with a displacement jumping，while the reversed fault earthquake is the instability occurred at the maximum displacement with a force jumping.
2015, Vol. 34 
