本文提出的这个方法,对于露天矿的爆区先用牙轮钻穿孔、后用火钻扩孔的联合穿孔工艺的采选公司具有重要意义。根据被穿孔的岩石性质和穿孔工作技术经济指标的研究结果,提出了露天矿孔径和孔网的优化法。 This method proposed in this paper is of great significance to the mining and dressing company of the joint perforation process that reaming holes with a roller cone and then reaming with a fire drill after the blasting area of ​​an open pit mine is open. According to the research results of the technical and economic indexes of perforation rock properties and perforation work, the optimization method of the open pit pore size and pore network is proposed.