采用超大孔径梯段爆破开采面板堆石坝填筑料的试验研究

Experimental Study of Exploiting Filler for Panel Rock-fill Dam by borehole Bench Blasting

该现场试验研究的主要目的是寻求钻爆速度快、效率高 ,且能有效控制爆落石料的粒径和颗粒级配组成的钻爆方法。因此首次尝试将钻爆效率较高的超大孔径 =2 5 0mm牙轮钻机 ,用于有严格级配和粒径要求的面板堆石坝料的爆破开采 ,取得令人满意的爆破效果。该项试验研究成果 ,有普遍的参考价值。

In order to seek for a drilling blasting method, which has a rapid drilling speed and high blasting effectiveness, and can effectively control the size and gradation of blasted stones, an bore hole(=250mm) rotatory driller was firstly used to exploit filler for panel rock-fill dam where the size and gradation are strictly required.