通过一次采全高和分层开采两个方案的比较计算，功定了适合东荣三矿厚煤层开采的最佳方案。
Through comparing calculation of two plan which are mining overall height in one times and shise mining, the optimum one suitake for thick coal seam mining in Dongrong No. 3 Coal Mine is determined.
通过一次采全高和分层开采两个方案的比较计算，功定了适合东荣三矿厚煤层开采的最佳方案。
Through comparing calculation of two plan which are mining overall height in one times and shise mining, the optimum one suitake for thick coal seam mining in Dongrong No. 3 Coal Mine is determined.
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