• This paper puts forward support plan through analyzing strata behavior regularity of coal roadway in seam with soft roof, soft coal and soft floor.

    文章通过永华煤矿“三煤层矿压规律进行分析,提出支护方案

    youdao

  • This paper puts forward support plan through analyzing strata behavior regularity of coal roadway in seam with soft roof, soft coal and soft floor.

    文章通过永华煤矿“三煤层矿压规律进行分析,提出支护方案

    youdao

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