金属露天矿帮坡角变化对最终境界影响

摘要 基于正锥排除法基本原理优化南芬露天矿最终境界，研究上盘帮坡角变化对最终境界开采形态、矿岩量等影响.根据南芬露天矿不同时期采场生产现状，设置相关技术经济参数，对矿山进行初始境界优化;按照0.5°步长逐步提升上盘帮坡角，优化不同上盘帮坡角条件下的最佳境界.研究表明，随着帮坡角变陡，最终境界地表范围逐渐缩小，底部尺寸变大或者向下延伸;不同帮坡角加陡方案得到的最终境界，矿岩量可能增大或者减小，总成本也可能增加，但利润值增大.
Abstract：Based on the moving cone method， the ultimate pit of Nanfen open pit mine was optimized and the influences of hanging wall angle variation on the pit shape， ores and rocks were studied. According to the mining states in different periods， related technical and economical parameters were set to optimize initial pit. The ultimate pits were optimized by increasing the hanging wall slope with the step of 0.5°. The results show that the ranges of ultimate pit shrink gradually and the bottom sizes become larger or downward with wall slope steeping. The ore-rock volumes of ultimate pits obtained by various steeping wall slope may increase or reduce， and the cost may increase， but the total profits increase.