-440大巷为软岩巷道，围岩松散破碎，以泥岩、沙质泥岩为主，为满足矿井发展需要，对-440大巷进行大断面扩修。在分析巷道岩性的基础上，提出联合支护的施工方案，并进行工业性试验，验证支护方案的可行性。% -440 roadway in soft rock roadway, surrounding rock is loose and broken, and is dominated by mudstone and sandy mudstone. To meet the demand of mine development, we expend -440 roadway. Based on the analysis of lithology of roadway, the paper puts forward the construction of combined support program, and takes industrial test and verifies the feasibility of supporting programs.
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