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巷道掘進過斷層、裂隙構造帶等破碎地帶時,需采用超前支護的辦法管理頂板。(????)

作者:煤礦安全網 2022-06-10 14:53 來源:煤礦安全網 巷道 斷層 裂隙 構造帶 地帶 辦法 頂板
題目信息:

  巷道掘進過斷層、裂隙構造帶等破碎地帶時,需采用超前支護的辦法管理頂板。()

  A:正確 B:錯誤

答案

煤礦安全網(http://www.nanibalconysafetynets.com)

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公安備案號:32031102000832

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