近年来国内许多有色、黑色金属露天矿山都在讨论或正在解决露天矿的扩大和延深问题。因为在联合开采中,露天开采部分经过多年的生产行将终结,为了保持矿山持续的生产能力和经济效益,需要延长露天开采的服务年限;有的矿山为了扩大生产规模,增加矿石产量而扩大露天开采的境界;还有的矿山,建矿初期 In recent years, many domestic non-ferrous and non-ferrous open-pit mines are discussing or are now solving the problem of expanding and deepening the open-pit mines. Because in the joint mining, after some years of open-pit mining production is coming to an end, in order to maintain sustained production capacity and economic efficiency of the mine, the need to extend the service life of open-pit mining; some mines in order to expand production scale and increase ore production and open-pit mining The realm; there are mines, early construction