示踪试验在凡口矿区帷幕截流工程中的应用  

Application of Tracer Test in Curtain Closure Project in Fankou Mining Area

作　　者：赵骏 张卫[1] 周玉新 张茹星 ZHAO Jun;ZHANG Wei;ZHOU Yuxin;ZHANG Ruxing(Three Gorges Research Center for Geo-hazard of Ministry of Education,ChinaUniersity of Geosciences(Wuhan),Wuhan 430074,China;Sinostell Ma'anshan GeneralInstitute of Mining Research Co.,Ltd.,Ma'anshan 243000,China)

机构地区：[1]中国地质大学(武汉)教育部长江三峡库区地质灾害研究中心,湖北武汉430074 [2]中钢集团马鞍山矿山研究总院股份有限公司,安徽马鞍山243000

出　　处：《安全与环境工程》2020年第4期15-23,共9页Safety and Environmental Engineering

基　　金：国家重点研发计划项目(2017YFC0804608)。

摘　　要：为查明凡口铅锌矿注浆帷幕的堵水效果以及是否还存在集中径流带,为后续帷幕建设提供科学依据,采用人工化学示踪方法,在凡口矿区开展多组地下水示踪试验。试验结果表明:①矿区东北部F5断层(203/FK1钻孔至金星岭背斜隐伏隔水层附近)隔水性良好,无需增设帷幕;②已建帷幕中,FH段堵水效果良好,基本无渗漏,IH段因注浆深度较浅,深部断层破碎带残留有渗流通道,而因FH段堵水导致矿区南部地下水水位抬升,隐伏隔水层失去隔水效果,但地下水水力梯度不大、流速缓慢(平均流速约为20.887 m/h,峰值流速为71.848 m/h),建议将EF段延伸至研究区西部出露的稳定隔水层;③矿区东部(IH段帷幕北部)存在沿断层破碎带发育的近东西向集中径流带,示踪剂穿透曲线分析发现该径流带由多条溶蚀管道组成,地下水流速快(平均流速为120.43~127.93 m/h,峰值流速为283.36 m/h)、径流集中(Pe数小于100),是后续帷幕注浆的主要目标段。In order to find out the water blocking effect of the grouting curtain in Fankou lead-zinc mine and whether there is still a concentrated runoff zone,using artificial chemical tracing methods in the mining area,this paper carried out multiple sets of groundwater tracing experiments to provide a scientific basis for the subsequent curtain construction.The test results show that①The F5 fault in the northeast of the mining area(near the drill hole 203/FK1 to the hidden aquifer of Jinxingling Anticline)is good water barrier,and there is no need to add curtains;②The water blocking effect of the FH section in the built curtain is good,and there is basically no leakage;the IH section is due to the shallow grouting depth,and the residual seepage channel in the deep fault fracture zone;because the groundwater level in the southern part of the mining area rises due to water blocking in FH section,the hidden aquifer loses the water-blocking effect,but the hydraulic gradient is not large,and the groundwater flow rate is slow(average flow rate is about 20.887 m/h,and peak flow rate is 71.848 m/h).It is recommended to extend the EF section to the exposed stable water barrier in the west of the study area;③In addition,in the east of the mining area(north of the IH section curtain),there exists a near east-west concentrated runoff zone developed along the fault fracture zone.The tracer penetration curve shows that the runoff zone is composed of multiple dissolution pipes,the groundwater flow rate is fast(average flow rate 120.43~127.93 m/h,peak flow rate can reach 283.36 m/h),and the runoff is concentrated(Peckle number is less than 100),which is the main target section of the subsequent curtain grouting.

关 键 词：凡口铅锌矿 示踪试验 帷幕优化 管道结构 水力参数 

分 类 号：X141[环境科学与工程—环境科学] P641[天文地球—地质矿产勘探]