近年来露天矿开采规模的扩大已使开采效率得到最大的改善,这是有利于采矿工业的。较高的台阶、直径较大的炮孔,以及威力较强的炸药在降低采矿费用方面起了重要的作用。可是,这些措施却导致爆破区域内能量密度的增大,这样就可能在露天矿最终边帮处引起严重的爆破后冲问题。如果不控制爆破后冲,露天矿总边坡角最终势必减缓,且将引起储量回收率降低和 In recent years, the expansion of the scale of open-pit mines has led to the greatest improvement in mining efficiency, which is beneficial to the mining industry. Higher steps, larger diameter boreholes, and more powerful explosives play an important role in reducing mining costs. However, these measures led to an increase in the energy density in the blasting area, which could cause serious post-blasting problems at the final edge of the open pit. If we do not control the post-blasting, the total slope angle of the open pit mine will eventually slow down and will lead to the reduction of reserves recovery rate