论文部分内容阅读
一最近,国外地下矿山发展了一种新的爆破技术,即在垂直的大直径炮孔中装填球状药包,在一个自由面的条件下水平分段爆破。它已应用在深孔崩矿的采场和深孔分段爆破掘进天井中,获得了良好效果。在地下采矿和掘进作业中,历来使用元柱状装药结构,并且除了掏槽炮眼以外,一般都是在两个自由面条件下进行爆破的。在垂直深孔崩矿中,除了水平拉底以外,还必须掘进切割天井并将它扩大成为垂直的切割槽。而开掘切割槽的工作相当繁
Recently, a new blasting technique has been developed for underground mines in foreign countries. That is, the vertical large-diameter blast holes are filled with spherical kits, and the horizontal blasting is carried out under a free surface condition. It has been used in deep-hole collapse mine stope and deep-hole blasting excavation wells, and achieved good results. In underground mining and driving operations, the columnar charge structure has traditionally been used, and except for undercutting, blasting is usually performed under two free surface conditions. In vertical deep-hole collapse, apart from the horizontal pull-out, it is also necessary to dig the cutting patio and enlarge it into vertical cutting grooves. The digging cutting slot quite complicated work