Abstract: The amplification and attenuation effects of blasting vibration in stepped terrain are important factors affecting the stability of slopes and structures.Establish a numerical model of the slope to study the generation and change law of terrain effect during blasting vibration.The test results show that there are obvious amplification and attenuation effects in the vibration velocity of the particle surface of the rock mass in the stepped terrain.The change characteristics of the amplification effect are closely related to the vibration frequency,and the attenuation effect is related to the rock clamp production and the vibration source distance.When the vibration frequency is low,the vertical vibration velocity of the rock mass point exhibits an amplification phenomenon,and the stepped terrain enhances this phenomenon.Considering the influence of elevation magnification factors and rockmass clamping factors on the blasting vibration velocity,the slope terrain vibration prediction formula is perfected.Provide conditions for engineering blasting construction design.

Key words: slope,step topography,blasting vibration,prediction model,numerical simulation