铜山露天矿采用加大孔网尺寸的微差爆破方式进行爆破工作,取得较好的效果,介绍于后。一、多排微差爆破在露天边界线上的应用; 爆破孔排数2～3排,在边界线上的一排炮孔,在13～14米段高,中硬到坚硬岩石的条件下,孔距5.5～6.0米,抵抗线4.5～5.5米,超钻深度0.5～1.0米,其余各排孔参数及炸药单 Tongshan open-pit mine to increase the hole size of the micro-blasting blasting work, and achieved good results, introduced in the post. First, the application of multiple rows of millisecond blasting on the open boundary line; blasting row of rows 2 to 3 rows, a row of holes in the border line, in the 13 to 14 meters high, hard to hard rock conditions, Pitch 5.5 ~ 6.0 meters, resistance line 4.5 ~ 5.5 meters, super drill depth 0.5 ~ 1.0 meters, the remaining row of holes parameters and explosives single