摘要
采动覆岩离层注浆是减少地表沉降的重要技术措施,其效果的好坏直接决定了最终的减沉效果,其中注浆钻孔的布置是最终注浆减沉的关键。本文通过工艺原理、工艺流程及关键技术三个方面对减沉注浆的成套钻孔施工技术进行研究,得到了成套的注浆钻孔施工工艺,并应用于范各庄矿铁路桥减沉工程,结果表明:该技术减沉率达到60.99%,该钻孔施工工艺对相关的离层注浆减沉项目的设计和施工具有一定的指导意义。
Mining-induced strata separation grouting is an key technology to reduce surface subsidence,and its effect directly determines the final settlement reduction effect.The layout of grouting boreholes is the key to the final settlement reduction by grouting.The complete set of drilling construction technology of subsidence reduction grouting is studied from four aspects,including process principle,process flow,operation points and quality control measures,and a complete set of grouting drilling construction technology is obtained,which is applied to the subsidence reduction engineering practice of railway bridge in Fangezhuang Mine.The results show that the technology increases the injection amount of fly ash slurry by 236%,and at the same time,through the observation of surface movement,it can be known that the subsidence reduction rate reaches 60.99%using this technology.The drilling construction technology has certain guiding significance for the design and construction of related separated grouting subsidence reduction projects.
作者
吴志臣
庞凯
魏华铭
WU Zhi-chen;PANG Kai;WEI Hua-ming(Tangshan Kailuan Construction(Group)Co.,Ltd.,Tangshan 063000,China;National Engineering Research Center of Coal Mine Water Hazard Control,University of Mining and Technology,Beijing 100083,China)
出处
《煤炭工程》
北大核心
2022年第12期63-66,共4页
Coal Engineering
关键词
采动覆岩
减沉注浆
注浆钻孔
钻孔结构
内外双管
overlying strata under mining influence
settlement reduction grouting
grouting drilling
drilling structure
double tubes inside and outside
作者简介
吴志臣(1969—),男,河北丰宁人,高级工程师,研究方向为水文地质与工程地质、注浆减沉等,E-mail:13933390927@163.com。
