NUMERICAL SIMULATION ON SPLITTING FAILURE MODE OF ROCK UNDER STATIC AND DYNAMIC LOADINGS

The program,rock failure process analysis(RFPA),is developed and the principle of RFPA to simulate the static and dynamic failures of rock are briefly summarized. RFPA is used to study the failure process of rock specimens under static and dynamic loadings. The numerical simulation reproduces the different failure characteristics of rock under static and dynamic loadings,and three typical failure patterns are found under the action of stress wave with different amplitudes. Numerical results indicate that the failure pattern is similar to those under static loading when the amplitude of stress wave is relatively low. With increment of amplitude of stress wave,the other two different failure patterns are also achieved. By contrast to static loading condition,more cracks initiate and propagate under dynamic loading,which cause the damage and fracture of whole rock specimen.