露天采矿降低消耗的办法之一是减少必须排弃的废石量,或者在不作补充开拓工作的情况下增加可采出的矿石量。后一种办法可以用人工加固来加大露天矿非工作帮总的边坡角,但需要额外的材料消耗及劳动费用。推荐的新露天采矿法是在露天矿场下部留矿柱。留下的矿柱待其间的岩石剥离以后再行开采。这种开采方法的实质如下:沿露天矿深度分成上下两部分(图1中1与2)。 One of the ways to reduce consumption of open pit mining is to reduce the amount of waste rock that must be disposed of or to increase the amount of ore that can be produced without additional exploration. The latter approach can be artificially reinforced to increase the total slope angle of non-working surface mines, but requires additional material and labor costs. The recommended new open pit mining method is to deposit the remaining columns in the open pit. The remaining pillars will be excavated after the rocks are stripped. The essence of this mining method is as follows: Depth into the open pit along the upper and lower parts (1 and 2 in Figure 1).