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根据掘进工作面出水点分布特征,有针对性地超前布置探放水钻孔,对顶板砂岩水进行疏放,为工作面回采创造了有利的条件。
According to the distribution characteristics of the water discharge points in the excavation face, the water drilling holes are advancedly arranged in advance and the roof sandstone water is dredged, thus creating favorable conditions for the mining face mining.