Abstract：Rock¢s quasi-static deformation equilibrium equation in premonitory phase of rock destabilization，which is induced by the energy conservation principle，includes body I¢s elastic energy releasing rate，body II¢s energy dissipation rate and energy importing rate (or generally titled“energy exchanging rate of surroundings and rock”)which is surroundings acting on the system；and full information of rock¢s quasi-static deformation course is covered. Analysis and illustration show it is consistent in discriminating the system stability by energy importing rate -presenting the descending or increasing tendency，and by Dirichlet discrimination law. Outside or surroundings imports energy into rock system when J ＞0；and the system exports energy to outside or surroundings when ； is the dynamic destabilization critical condition of rock，and which can be applied to determine the starting point and ending point of rock destabilization. They can offer scientific basis for calculating releasing energy of earthquake when earthquake or rockburst happens. The quasi-static strain equilibrium equation of rock system is deduced correctly for the first time from whole amount form of total potential energy obtained by imitating elastic stabilization theory.
