复合强富水含水层帷幕薄弱带识别方法与靶向加固技术  

Identification method and target reinforcement technology of weak zone of curtain in multiple media and water-abundance aquifer

作　　者：石志远 SHI Zhi-yuan(Xi’an Research Institute,China Coal Technology and Engineering Group,Xi'an 710077,China;Shaannxi Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology,Xi'an 710077,China)

机构地区：[1]中煤科工集团西安研究院有限公司,陕西西安710077 [2]陕西省煤矿水害防治重点实验室,陕西西安710077

出　　处：《煤炭工程》2022年第4期57-61,共5页Coal Engineering

基　　金：国家重点研发计划项目(2017YFC0804102)。

摘　　要：为了治理复合强富水含水层帷幕薄弱带,以朱仙庄煤矿侏罗系灰岩含水层帷幕为研究对象,分析研究了帷幕薄弱带形成的主要原因与薄弱带识别方法,提出了以钻孔布置原则和靶向注浆技术为核心的帷幕薄弱带治理技术体系。结果表明:含水层各向异性、高速动水条件、地下水冲击或侵蚀作用以及构造条件是薄弱带发育的主要原因;加固钻孔布设在帷幕墙外主径流方向上,距离帷幕0.5~1倍扩散半径,孔间距及钻孔个数由浆液扩散距离和薄弱带长度决定;利用井下疏降产生的水压差形成动水条件,将传统加固方式发展为靶向注浆加固,可以使浆液有针对性地加固帷幕薄弱带。研究成果减少了注浆盲目性,降低了治理成本,实现了复合强富水含水层帷幕截流目标。In order to control the curtain weak zone of multiple media and water-abundance aquifer, taking the curtain of Jurassic limestone aquifer in Zhuxianzhuang Coal Mine as the study area, the main reasons of the formation of weak zone of curtain and the identification method of weak zone are analyzed and studied. And the targeted control technology system for the weak zone of curtain based on drilling layout principles and targeted grouting technology is proposed. The results show that: the main reasons for the development of weak zones are aquifer anisotropy, high-speed hydrodynamic conditions, groundwater impact or erosion and structure;the reinforcement boreholes are arranged in the main runoff direction outside the curtain wall, 0.5~1 time the diffusion radius from the curtain, and the hole spacing and number of boreholes are determined by the slurry diffusion radius and the length of weak zone;using the water pressure difference caused by underground drainage to form hydrodynamic conditions, the traditional reinforcement method is developed into targeted grouting reinforcement, which can grout the weak zone of curtain targeted. The research reduced the blindness of grouting, reduced the treatment cost, achieve the curtain closure of multiple media and water-abundance aquifer.

关 键 词：强富水含水层 帷幕截流 薄弱带识别 靶向注浆 

分 类 号：TD745[矿业工程—矿井通风与安全]