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Five Measures to Improve Blasting Quality in Open-pit Mines

Release date:2018-11-21  source:中南选矿网  Browse times:907
      为了提高露天矿山爆破质量,行之有效的方法有以下几种: (1)采用多排孔毫秒爆破。它其有显著的优点:岩石破碎均匀,大块率低,爆堆集中,后冲作用小。它能充分利用爆破后岩块所具有的动能而使之转化为相互间碰撞的机械功,从而产生补充破碎作用。 (2)合理的装药结构。采用间隔装药或混合装药结构,都可以改变炸药的分布,有利于减少大块的产生。 (3)斜孔爆破。采用斜孔爆破,使台阶各处的抵杭线大小均匀,从而有利于提高爆破质盆。 (4)利用残余爆堆控制抛掷。 (5)高台阶爆破。使用高台阶爆破有以下优点:成倍地增大一次爆破量,有利于穿爆、采装和运输工作的平行作业,炮孔装药的有效长度相对增加,爆炸能集中,改善矿岩破碎质量.减少了后冲作用和超钻对未娜岩体的破坏范围 .减少超钻、开孔的数量,有利于提高钻孔效率。

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