降低矿床露天开采费用的一个途径是减少应剥离的废石量,或者在不进行补充剥离作业的条件下增加可采矿石量。后者可用人工加固非工作帮边坡增大整个边坡角的办法加以保证,但这需要追加材料和劳动消耗。现推荐露天开采的一个新方法,它是在露天采场的下部留下一些矿柱,待矿柱之间堆入剥离岩石之后再回采这些矿柱。 One way to reduce the cost of open-pit mining is to reduce the amount of waste rock that should be peeled off or to increase the amount of recoverable ore without replenishing the strip. The latter can be reinforced by manual reinforcement of non-working slope to increase the entire slope angle, but this requires additional materials and labor consumption. A new approach to open pit mining is now proposed. It is to leave some pillars in the lower part of the open pit and to recover the pillars after the pillars have been piled into the peeled rocks.