To study the propagation of seismic wave caused by pile-well blasting on the natural slope nearby

field test of vibration velocity is carried out during the excavation of pile-well blasting. Two measuring points are set on the step adjacent to the pile-well

one is on the foot of the slope

another is on the edge of step. The results show that the radial

vertical vibration velocities and the main frequency of measuring point on the edge of step have an increasing trend than ones on foot

slope effect appearing. While it has a decreasing trend in the tangential direction

illustrating that the changes of vibration velocity and frequency of blasting seismic wave are in consistency; and the amplification effect of blasting seismic wave has directionality; among them the vertical is the main. Slope effect explains the amplification effect of blasting seismic waves on the edge of step reasonably. Meanwhile

the analysis of blasting seismic wave frequency of "whiplash effect" verifies the reasonability of the slope effect.