降低露天台阶爆破不合理大块率和根底率的有效方法

SEVERAL EFFECTIVE METHODS TO REDUCE THE QUALITIES OF OVERSIZE BOULDERS AND STUMPS OF BENCH BLASTING IN AN OPEN PIT

本文从穿爆生产角度出发,分析了台阶爆破中不合理大块及根底的产生原因,通过选取合理的炮孔抵抗线、孔间距、超钻深度、炮孔填塞长度和穿孔深度,以及采用孔底水间隔装药,有效地降低了台阶爆破不合理大块率和根底率。

This article,as viewed from drilling and blasting operation,analyses the rteasons of oversize boulders and stumps produced in the course of bench blasting,drew support from choosed reasonable drill and blast parameters;burden.pacing、aubgrade、stemming length and drilling depth,and adopted water-spaced charging at the bottom of blasthole,the qualitities of oversize boulders and stumps are effectively reduced.