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用崩落法采下的矿石是在废石层覆盖下放出的。放矿过程中,出矿品位随着废石的混入而不断降低。因此,必须统计出矿量并测定出矿品位,以确定终止放矿期,计算矿石的损失和贫化。
The ore taken by the caving method is released under the cover of waste rock. In the process of ore drawing, the grade of ore is continuously reduced with the mixing of waste rock. Therefore, it is necessary to count the ore amount and determine the ore grade in order to confirm the termination of the ore release period and calculate the ore loss and depletion.