The shock of stress waves causes deformation in intact medium

the form of new cracks and finally the failure in the material. The preexisting cracks not only help increase fracture efficiency but also absorb the energy of the stress wave to induce a decay of its propagation. Therefore the study of interaction of Stress waves with cracks will greatly contribute to the interpretation of blasting mechanism

the stress wave propagation and the dynamic behaviour of material. Our emphasis is laid on interaction of stress wave with cracks

and the influence of cracks on attenuation of the wave propagation. A view is made of the current state of model calculation and experimental technique carried out in this field.