Abstract：Aiming at the attenuation of stress wave traveling through the rock joints，the influences of joint geometrical shape and stiffness on the stress wave transmission coefficient are analyzed. According to the geometrical shapes，six joint models have been designed to simulate the different rough surfaces of fracture. UDEC is adopted to simulate the wave propagation of single fracture with the six models and different stiffnesses. The modeling results of the transmission coefficient of the fracture models are compared with the theoretical solutions. It reveals that a rough joint surface distinctly affects the stress wave transmission in the jointed rocks compared with a smooth plane joint and decreases the amplitude and velocity.
