有用矿物矿床储量的合理利用要求以最优的损失率和贫化率进行开采,并要求综合回收有用成分。表1列出了科夫多尔采选公司矿石损失贫化的情况。从1962年(该矿床开始开采)到1974年间,在主矿体中央部分开采时,由于矿石的开采损失极少,既没有制定定额也没有核算。从1975年开始矿石的损失贫化按全苏地质测量研究联合公司拟订的方法制定了定额,这种方法在《苏联黑色冶 The rational utilization of useful mineral deposits requires the extraction at optimum loss rates and depletion rates and requires a comprehensive recovery of the useful components. Table 1 shows the depletion of ores in the Cooperstall Mining Company. From 1962, when the deposit was started, to 1974, there was neither quotas nor accounting for the loss of ore mining at the central part of the main orebody. The depletion of ores from 1975 onwards devel- oped a quota based on the methodology developed by the All-Russia Geological Survey Research Company, a method developed in "The Black Soviet Union