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无底柱分段崩落采矿法的矿石损失率和贫化率都比较大,是生产中亟待解决的问题。从生产现场或实验室模拟放矿中观察,整个放矿过程可分三个阶段,参见图1:①纯矿石回收阶段,矿石回收率曲线呈直线上升,这个阶段越长越有利于多回收矿石;②矿石贫化阶段。矿石开始贫化,但当次矿石回收率大干当次矿石贫化率,这个阶段还是以回收矿石为主。③结束阶
The pillarless caving mining method has relatively large ore loss rate and depletion rate, which is a problem to be solved urgently in production. From the production site or laboratory simulated ore observation, the whole process of the ore can be divided into three stages, see Figure 1: ① pure ore recovery stage, ore recovery curve was a straight line, the longer this stage is more conducive to the recovery of ore ; ② ore depletion stage. Ore began to deplete, but when the ore recovery rate is greater than the times when the ore dilution rate, this stage is still based on the recovery of ore. ③ end level