中文摘要：

富水砂层巷道掘进，由于砂层胶结力差、强度低，开挖后迎头易发生大跨度变形、失稳破坏。针对2煤回风巷掘进至F26断层时发生联锁性突水动力灾害，采用工程调查、理论分析和现场实践等综合方法，提出了注浆封堵加固、定向疏放水工艺。结果表明：施工钻场对突水区域进行注浆封堵加固，能有效固化该区域岩（煤）体，改善岩（煤）体结构及其力学性能，提高整体稳定性，1号、2号封堵体堵水效果较好；同时为防止泥沙充填裂隙通道，造成二次突水，在带式输送机巷布设钻场（5个定向钻孔、孔径φ113mm、孔深45m），对漏顶区域及上部含水层进行可控疏放，水位变化曲线观测得出钻孔水位与巷道出水量稳定、突水点处泄水通道畅通，疏放水效果较好。

英文摘要：

Water - rich sand stratum is often encountered in roadway tunneling. Due to the poor cementing property and low strength of sand, after excavation, large span deformation, instability and other dynamic disasters may happen. A series of chain water inrush dynamic disasters happened when the return airway tunneled to Fault 26. Through engineering survey, theoretical analysis, filed practice, a control scheme was proposed, including grouting sealing reinforcement and directional water drainage. The results showed that, grouting reinforcement on water inrush area with drilling field could effectively solidify the regional rock （coal） body, improve rock （coal） body structure and the mechanical properties, and enhance the overall stability. The water sealing effect of No. 1 and No. 2 block body was favorable. In order to prevent the sediment filling fracture channel, resulting in secondary water inrush in drilling field, drilling site was arranged in belt conveyor roadway, with 5 directional drilling, borehole diameter 113mm, depth 45m. Controlled water drainage was applied in roof leakage area and the upper aquifer. The observation of water level change curve showed that, borehole water level and roadway water discharge was stable, discharge channel at the water inrush point was clear and favorable drainage effect was achieved.