• The deep well coal road cable of small diameter hole and high pre-tension structure and craft were studied according to the condition of high stress and composite roof in Fengcheng coal field.

    结合丰城矿区地应力顶板等复杂地质条件研究深井条件下煤巷锚索采用孔径加高预应力结构形式施工工艺

    youdao

  • The deep well coal road cable of small diameter hole and high pre-tension structure and craft were studied according to the condition of high stress and composite roof in Fengcheng coal field.

    结合丰城矿区地应力顶板等复杂地质条件研究深井条件下煤巷锚索采用孔径加高预应力结构形式施工工艺

    youdao

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