孔内微差拉槽挤压爆破(图1)的实质是在爆破岩层中心部位每个孔内分段分岩层孔内微差起爆并拉开槽腔,而后逐次起爆槽腔两翼的炮孔,从而增强了挤压效果,也达到分层爆破集堆,简化工艺过程,减少矿损贫化,提高爆破效果、降低成本等目的。 The essence of the micropump trough extrusion blasting in the hole (Figure 1) is that the micropore in each hole in the center of the blasting rock burst into the groove cavity in a minute, and then the groove cavity is pulled open, Thereby enhancing the extrusion effect, but also to achieve a layered blasting pile heap, simplify the process, reduce mineral loss and depletion, improve the blasting effect, reduce costs and so on.