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Abstract The indoor experimental method of concrete slope model and finite element model are considered to study dynamic characteristics of rock slope under blast loading. The result shows that the propagation law and attenuation characteristics of the detonating earthquake wave on slope are different to the condition of level ground，and the attenuation of peak particle vibration is small with distance. The vertical and horizontal attenuation indices of peak particle vibration are 0.76 and 0.42，respectively. Comparing the peak particle vibration of the top and other particles of the slope，peak particle vibrations of the top particles are larger than those of other particles，so there are vibration enlarging effect at the top particles of the slope. Comparing the peak particle vibration of point No.3 facing blasting source and point No.4 backing blasting source，the peak of vertical velocity is reduced by 72.7% and the peak of horizontal velocity by 67.6%，so the measures of damping ditch can reduce the value of peak particle vibration greatly and can improve the stress state of the slope under blasting load. With the experimental results，the particle velocity and the index of regression equation are in the same magnitude with the test data，and the peak particle velocity increases with its height，too. The calculation results can give the reality particle vibration law of the slope under blast loading well.
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Received: 20 December 2008
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