Abstract: In order to study the explosive stress wave propagation in rock mass，the finite element model was built based on ABAQUS / EXPLICIT software，in which the ricker wavelet was used as the explosion source.The numerical result illustrates the feasibility of using ricker wavelet as an explosion source in the simulation of explosive stress wave propagation compared with dynamic photo-elastic experimental results.The result shows that：under the action of explosive stress wave，the stress in rock media presents three stress state with time order：the compression-shear stress field induced by radial compression stress and tensile tangential stress; the tensile-shear stress field composed of a combination of radial tensile stress and tangential tensile stress; the tensile-shear stress field formed by radial tensile stress and tangential tensile stress.Strong stress concentration has formed under the stress superposition the reflection and diffraction waves generated after crossing the open joint and explosion stress wave，and blast-induced wing crack eventually initiates and propagates at the both ends of the joint.

Key words: Explosive stress wave, Ricker wavelet, ABAQUS, Jointed rock