中国矿山工程

In this paper, an open-pit mine in DRC is taken as an experimental site. Firstly, the data of previous blasting shock and related lithology and geology information are analyzed. Secondly, under the condition of the same parameters such as hole depth, hole spacing, charge and packing, the blasting with shock damping ditch, pre-splitting blasting and blasting without shock damping measures are carried out respectively. The blasting shock data are collected, processed and analyzed, and the shock damping effect of pre-splitting blasting is studied. The results show that pre-splitting blasting can reduce the shock peak value by more than 13% compared with normal blasting; the closer the measuring point to the blasting center, the greater the shock damping effect of pre-splitting blasting, viz. the closer the protected building to the blasting works, the better the shock damping effect of pre-splitting blasting; and pre-splitting blasting has less shock damping effect than blasting with shock damping ditch.