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.

 
  • 對露天礦萬(wàn)噸礦石開(kāi)溝比的含義,及如何利用這一指標對采場(chǎng)生產(chǎn)能力進(jìn)行檢驗,作了簡(jiǎn)要的論述。
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