In mining the extremely fractured thin ore body, the separation of waste rock in the conventional shrinkage stoping was replaced by the separation of the rich ore and retaining the lean ore.

对极破碎薄矿体的开采，采用了将常规的留矿法中分选废石改为分选富矿石留贫矿石的采矿方法。

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The lean magnetite ore can be turned into one that has utilization value by wet preconcentration by magnetic separation after fine crushing to discard most of qualified waste.

通过采取细碎后湿式磁选预选方法，抛除掉大部分合格废石后，可以将该贫磁铁矿变成为具有开发利用价值的矿物。

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