最近,在内华达金矿硫化矿体露天采场发生了两起意外爆炸。前几年,在内华达州、加州和亚利桑那州的金矿此类事故也时有发生。一些铜矿、一座煤矿及一座石灰石中赋存有星散黄铁矿油页岩的石灰石矿也发生过类似事故。发生这些事故矿山的共同点是:(1)开采的矿石中存在硫化物;(2)使用的炸药都 Recently, two unexpected explosions took place in the open pit of sulphide ore bodies in the Nevada gold mine. A few years ago, accidents in gold mines in Nevada, California and Arizona took place. A number of copper mines, a coal mine and a limestone mine containing limestone fractal pyrite oil shale also occurred in similar accidents. The common occurrence of these accidents is that: (1) there is sulfide in the mined ore; (2) both the explosives used