金属露天矿次边界品位和次品位储矿堆的优化决策

OPTIMUM DECISION ON SUB-CUTOFF GRADES AND STOCKPILES IN METAL OPEN PITS

提出并严格定义了露天矿次边界品位的概念，阐明了它与开采边界品位的密切关系及其巨大经济意义。提出和建立了确定最优次边界品位的比较完整的理论方法。通过实例全面论证了露天矿三种典型生产能力配比下次品位储矿堆的不同的控制方式和为企业可能带来的巨大的潜在经济效益。

The paper presents and defines strictly the concept of the sub-cutoff grade for open pit mining,describes its close relations to the operational cutoff grade as well as its great economic significance.The method for determining the optimum sub-cutoff grade is developed.The ways the sub-grade stockpiles better be controlled on three typical bottle-neck modes of the metalic open pit production and the huge potential economical benefits are discussed as well proved through computerized analysis.