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梧桐庄矿主井井筒积水量为１．８３万ｍ３，水头压力５．４５ＭＰａ。选择安全的隔水层及可靠的孔口装置，成功地进行了钻孔放排水
Wutongzhuang mine main shaft well water volume of 18,300 m3, head pressure 5.45MPa. With the choice of a safe aqueduct and a reliable orifice device, the well was successfully drilled and drained