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利用旧井巷工程，开凿一条长１８ｍ的疏水巷道，使透入３１４０４采煤面的涌水通过３１４０２采空区疏干，降低水压；保证了采煤工作面的正常生产，减少了３下煤层开采透水的威胁，增加了开采作业的可靠性和安全性。
Using the old well lane project, a 18m long drainage tunnel shall be drilled so that the gushing water penetrated into the 31404 coal mining surface will be dredged through the 31,402 gob area to reduce the water pressure; the normal production of the coal mining face is ensured and the coal seam under 3 The threat of mining permeable water increases the reliability and safety of the mining operations.