Characters near strong impact loading zone in hard rock

The process of rock failure under impact loading was analyzed with mechanics model and the dynamic behavior was described according to hard rock characters. The stress state transfered from elastic state to intrinsic friction state, finally liquid hydrodynamics state. Based on analysis of intrinsic friction state, the deformation near impact loading in rock is similar to one-dimension at deformation near strong impact loading zone. The stress wave from the loading can be regarded as short-wave which is similar to shock wave. Characteristics of the short-wave have sharp varieties in a cabined zone near wave front. According to the stress and the deformation state of rock near the strong impact loading zone, the velocity field was deduced by use of conservation relation of mass. Based on short-wave theory, the stress wave attenuation rule in rock near the strong impact loading was gained.