地面预注浆施工技术在井筒涌水防治中的应用

发布时间：2018-03-03 03:32

本文选题：井筒　切入点：涌水　出处：《隧道建设》2017年05期 　论文类型：期刊论文

【摘要】：张集矿区地层位于裂隙破碎带且含水量丰富,为解决第2副井井筒地面预注浆施工难度大的问题,基于工程地质调研、技术设计和工业试验的方法对地面预注浆施工技术进行了研究。通过在井筒开凿前上部表土段采用冻结法施工、下部基岩段采用地面预注浆技术施工,并采用直孔和Y孔相结合的布置方式,实现了注浆、冻结和凿井"三同时"施工的目的,有效节约了工期。在整个施工过程中,采用自主研发的监控设备,实现了实时控制并获得了重要的注浆参数,同时采用压水试验的方法对注浆质量进行了效果评价。根据监测结果:1)各段终压值和注浆量均达到了设计要求,总注浆量达16 286 m~3;2)压水试验测得的地层渗透系数明显减小,井筒涌水量仅为2.27 m~3/h,说明该施工方法起到了很好的加固和堵水作用。
[Abstract]:The stratum of Zhangji mining area is located in the fractured zone with abundant water content. In order to solve the difficult problem of ground pre-grouting construction in the second auxiliary well, based on the engineering geological investigation, The surface pre-grouting construction technology is studied by technical design and industrial test. The freezing method is used in the upper topsoil section before borehole excavation, and the ground pre-grouting technique is used in the lower bedrock section. With the arrangement of straight hole and Y-hole, the purpose of grouting, freezing and sinking is realized, and the construction period is saved effectively. In the whole construction process, the self-developed monitoring equipment is adopted. The real time control is realized and important grouting parameters are obtained. At the same time, the grouting quality is evaluated by the method of water pressure test. According to the monitoring results, the final pressure value and the grouting quantity are all up to the design requirements. The total grouting amount is 16 286 mm2 / 3 / 2) the formation permeability coefficient measured by the water pressure test is obviously reduced, and the wellbore water inflow is only 2.27 mm3 / h, which shows that the construction method has played a very good role in strengthening and plugging water.
【作者单位】：安徽理工大学土木建筑学院;
【基金】：安徽省高校自然科学研究重大项目(KJ2015ZD20) 矿山地下工程教育部工程研究中心开放课题(2015KF05)
【分类号】：TD745.2

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