控制爆破技术在采场落矿中的应用

Application of controlling blasting technique on ore caving in stopes

由于受地质构造的影响,蚀变岩型及破碎带型金矿床在开采时顶板稳固性差,局部和较大面积的顶板冒落现象时有发生,为解决采场回采过程中顶板的安全问题,提高采矿主要技术经济指标,采用控制爆破技术落矿,可获得显著的效果。文中介绍了峪耳崖金矿采场落矿周边孔控制爆破、大孔距爆破技术、微差爆破的应用及爆破参数,值得类似条件矿山参考。

As a result of geologicstructure influence, the roof stability is poor in altered rock and crushed belt gold deposits, and partial or large area roof collapses often occur. To ensure the roof security and enhance the mining technological economic indexes, the controlling blasting technique is used in ore caving and remarkable effects are obtained. The surrounding hole controlling blasting technique, largo hnle-distance blasting technique,millisecond blasting technique and blasiing parameters used in Yu＇ eya gold mine are introduced in the paper.