对露天矿万吨矿石开沟比的含义，及如何利用这一指标对采场生产能力进行检验，作了简要的论述。
The significance of ditching ratio per ten thousand ton ores for open pits is given, and how to use this index to test productive capacity of stope is briefly discussed.
对露天矿万吨矿石开沟比的含义，及如何利用这一指标对采场生产能力进行检验，作了简要的论述。
The significance of ditching ratio per ten thousand ton ores for open pits is given, and how to use this index to test productive capacity of stope is briefly discussed.
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