Abstract：To study the influence of intermittent cracks(joints) on wave propagation in fractured rock media，the rock-like material samples are adopted to simulate rock media with different lengths，thickness，densities，angles and forms of cracks. Supersonic tests on these samples are conducted to study the changes of velocity and amplitude attenuation of longitudinal wave in cracked media. Additionally，the corresponding numerical simulations are conducted to study the characteristics of wave propagation in cracked media with international large-scale geotechnical analysis software FINAL. The numerical results are compared with laboratory results. The research results show that crack length nearly has not influence on longitudinal wave velocity. Attenuation of stress wave amplitude depends on the projection length of cracks which are perpendicular to wave propagation direction. The larger the projected length of crack is，the more the wave amplitude attenuates. With the increasing rows of cracks，the stress wave amplitude will attenuate. The stress wave amplitude of sample with two rows of cracks is about half of that of sample with one row of cracks，and stress wave amplitude of sample with three rows of cracks is about one third of that of sample with one row of cracks. Furthermore，the largest stress wave amplitude will be delayed with the increasing rows of cracks.
