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Abstract the study of protective effect of buffer blasting on the reservation slope in open-pit mine is decribed. Based on the data of blasting vibration in the open-pit mine，the data of blasting experimental vibration on having or not having buffer blasting hole are given by setting reasonable buffer blasting parameters. Using FEM program of LS-DYNA，the two different numerical models are made to study the bench blast；and comparative analysis of the simulation results with the results of field experiment makes a conclusion that the more near from is the explosion source，the better decreasing effect is；and half cast factor can be improved mostly 30% of the presplitting blast hole. On the basis of comparative analysis of the simulation results and the field experimental data，it is concluded that it will decrease the blasting vibration 51 % under the same condition with having the presplitting blast hole at mostly，so it will do strongly protective effect on the reservation boundary working slope.
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Received: 10 December 2010
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2011, Vol. 30 
