A SELF-LOCK MODEL OF STICK-SLIP AND ITS NUMERICAL SIMULATION
Chen Tiemin, Tao Zhenyu (Wuhan University of Hydraulic and Electric Engineering, Wuhan, 430072, China)
In this paper,we put forward a self-lock model of rock friction, reflecting the relationship of confining pressure and Stick-slip. In addition, we discussed the influences of confining pressure and confining stiffness on stick-slip and its stress drop with numerical simulation. The results indicate that: 1. The increasing of confining pressure is advantageous to stick-slip. 2. The stress drop of stick-slip increases with the increasing of confining pressure. 3. That the stress drops of natural earthquakes are not as great as that of laboratory experiment is caused by confining,stiffness.