A mine air returning inclined shaft of Songxinzhuang Mine had an inclination of 22° ,a net cross section of 16.3 m2 and an inclined length of 1 465 m.When the mine inclined shaft was headed at length of 283.4 m ,a quicksand stratum with a thickness of 8.3 m and a inclined length of 22 m was suddenly occurred.A water inflow of 15 m3/h was come from the quicksand stratum ,a conventional method was applied to the handling with no effect and the project construction had to stop.According to the certain condition ,with a comparison of the plans ,a chemical grouting technology was deter-mined and applied to the handling of the quicksand stratum. The chemical grout was pre-grouted into the quicksand stratum at the mine inclined shaft heading face and then a water sealing and reinforce-ment were conducted. The combination of the pilot support ,short sectional heading and support ,pow-erful support ,frequent measurements and other technical measures was conducted for the construc-tion. After the plan was implemented ,the mine inclined shaft was safely and successfully passed through the section of the water bearing quicksand stratum with an expected effect.%宋新庄煤矿回风斜井倾角22° ,净断面16. 3 m2 ,斜长1 465 m.井筒掘进至283. 4 m处时 ,突遇层厚8. 3 m、斜长22 m的泥流砂层 ,涌水量15 m3/h ,采用常规方法处理,未能奏效 ,工程被迫停工.根据具体情况 ,经方案比选,确定采用化学注浆技术进行治理.即在工作面 ,向流砂层预注化学浆液 ,进行堵水加固;结合超前支护、短段掘支、强支撑、勤量测等技术措施进行施工.方案实施后 ,安全顺利地通过了含水流砂层段 ,收到了预期效果.
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