利用炸药将露天矿覆盖岩层抛向废石堆和露天坑是难于正确确定的,不过这种方法在某些矿山已颇为见效,最近在西宾夕法尼亚煤矿成功地采用了爆炸抛掷法。大多数采用这种技术的矿山,都以自己的经验而不是以理论或控制性试验为依据去选取爆破参数。匹兹堡的D’Appolonia咨询工程师协会研究出一种最佳的理论模式,能对爆炸抛掷爆破进行成功地预测。 D’Appolonia方法看起来复杂,用起来却简单。总 The use of explosives to throw open-pit mines into abandoned rock piles and open-pit pits is difficult to determine correctly, but this method has worked well in some mines and has recently been successfully adopted by the explosive throwing method in the West Pennsylvania coal mine. Most mines that use this technology choose their blasting parameters based on their own experience rather than on theoretical or controlled tests. The Institute of Consulting Engineers at D'Appolonia, Pittsburgh, has developed the best theoretical model for successfully predicting explosive torn blasting. The D'Appolonia method looks complicated and easy to use. total