岩金矿山级差品位指标的探讨

An Approch to the Grade Difference Index of Gold Mines

在分析岩金矿山开采特点的基础上，把矿山开采划分为开拓、采准、备采和存窿放矿4个阶段，相应的形成开拓矿量、采准矿量、备采矿量和存窿矿量．各阶段所投入的费用和劳动消耗逐级累积增加，而相应的各阶段则逐级减少．相应各阶段生产矿量的最低工业品位要求逐级降低．所需求的最低工业品位只担负偿还该阶段及以后为开采它所需的费用和劳动消耗．提出建立岩金矿山生产矿量级差品位指标系列和计算公式，来不断研究、分析、衡量开采矿块（块段）所处的生产阶段，确定它的经济价值和资源利用程度，指导矿山采准、采矿、出矿、配矿的生产，达到提高矿山企业经济效益，充分利用资源，延长矿山服务年限的目的．

Based on the analysis of gold mining, mining is divided into four stages: developmemt, opening up, stoping and ore storage, and corresponding to development reserves, prepared reserves, extraction reserves and stored ore. The total cost and labour consumption in the above stages are accumulated stage by stage and the individual cost and labour consumption of each stage decreases－ The requirement to the lowest economic grade of the production reserves of each stage decreases. The lowest economic grade required assumes the cost and labour consumption of each stage and the later mining. The index system and calculation formulas for the grade differenee of production reserves of gold mines are proposed, in order to study, analyze and determine the production stage of each mining block, to determine its economic value and utilization degree, and to direct the production of opening up, mining, ore removal and ore blending.