平凉天元煤电化有限公司五举煤矿设计生产能力2.4Mt/a,采用立井-暗斜井开拓方式,井筒净断面直径6m,掘进断面直径7.2m。2013年1月井筒正式掘砌施工,于2013年6月施工至井深225.7m时发生裂隙断层突水,最大涌水量达到360m3/h,超过现场强排能力,造成淹井事故,最深淹井达131.5m,最终采用静水压下混凝土封底堵水成功,排干积水,再通过深孔注浆的方案成功穿越该承压含水层。 Pingliang Tianyuan Coal and Power Co., Ltd. five cited coal mine design and production capacity of 2.4Mt / a, the use of vertical shaft - dark shaft incision mode, the wellhead net section diameter of 6m, heading section diameter of 7.2m. In January 2013, the wellbore excavation was carried out. In June 2013, when the well depth was 225.7m, water burst occurred in the fractured zone. The maximum water inflow reached 360m3 / h, exceeding the on-site drainage capacity, resulting in flooding and the deepest flooding 131.5m. Finally, the water seal was successfully applied to the back cover of the concrete under hydrostatic pressure to drain off the stagnant water and then successfully cross the confined aquifer through the scheme of deep hole grouting.