... coal resources mining 煤炭资源开采 coal-mining methods 采煤方法 coal pillar mining 带煤柱开采 ...
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coal mining methods 采煤方法
Methods of Coal Mining 煤炭开采方式
coal caving mining methods 放顶煤采煤法
Practice has proved that the coal mining methods and technology to meet the recovery of the coal requirements have been successfully applied.
实践证明，该采煤方法和回采工艺满足了该煤层的回采要求，得到了成功应用。
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