Experimental Research into Effect of Blasting Vibration on Stability of Surface Buildings

The forecast and control of blasting vibration disasters is very important in blasting construction and design.In order to mine the shallow remnant antimony ore in Wulongdao mining area of Xikuangshan and to ensure the security of the surface architecture during underground mining blasting,we measured the blasting vibration velocity by using the UBOX-20016 measurement recorder and studied the relation among blasting vibration velocity,maximum charge of a single segment,and blast center distance.The results show that(1) the millisecond blasting technique can effectively reduce number of disasters induced by blasting vibration and the millisecond delay time should be longer then 50ms,and(2) the maximum charge of a single segment should be strictly controlled,with the value being 28.5 kg.