开采境界设计是露天矿设计中的关键之一。对于生产矿山,若露天坑底位置固定,境界随边坡角的确定而确定,目前边坡研究中,已能较好地解决这一问题。而在设计新矿山时,境界与边坡角均可能变化,比如多方案比较,境界调整,最优化设计,以及矿山经济分析等,都要求边坡研究不仅要为开采矿 Mining design is one of the key points in the design of open pit. For the production of mines, if the position of the bottom of open pit is fixed and the boundary is determined according to the slope angle, the slope research has solved this problem well. In the design of new mines, the realm and slope angle may change, such as multi-program comparison, realignment, optimal design, and economic analysis of mines, etc., require the study of the slope not only for mining