大量崩矿时,对深孔布置方式的选择,正给予高度重视。虽然深孔平行布置具有一系列的明显优点(凿岩工作量减少,单位炸药消耗量降低,崩落矿石的破碎质量得到改善,爆破作用对矿山巷道的不良影响减小等),但是深孔平行布置在一些地下矿山并没有获得推广。深孔扇形布置,靠爆破控制矿石的破碎程度,乃是一项复杂的任务。然 When a large number of mine collapse, the choice of deep hole layout, is given great importance. Although parallel arrangement of deep holes has a series of obvious advantages (reduction of drilling workload, reduction of unit explosive consumption, improvement of crushing quality of caving ore and reduction of adverse influence of blasting on mine roadway), deep holes are arranged in parallel In some underground mines did not get promotion. Deep-hole fan-shaped layout, controlled by blasting the degree of ore crushing, but is a complex task. Of course