矿坑涌水封堵治理过程中岩溶导水通道连通性研究
投稿时间:2019-09-17  修订日期:2020-02-18  点此下载全文
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作者单位E-mail
高学通 华北有色工程勘察院有限公司 gaoxtcumt@qq.com 
王志奇 华北有色工程勘察院有限公司  
檀利波 华北有色工程勘察院有限公司  
中文摘要:受含水层岩溶发育不均匀性影响,大水矿山矿坑涌水导水通道空间分布位置的探查存在较大技术难度,难以针对性制定矿山防治水方案。以强岩溶地区某大水矿山矿坑涌水治理工程为背景,通过连通试验研究了注浆孔揭露岩溶通道与矿坑主要涌水点之间的水力联系,并在标定水样电导率—食盐浓度对应关系的基础上,计算了岩溶通道补给水源中汇入涌水点的比例。试验结果表明,该岩溶通道与矿坑-30m水平最大涌水点连通性好,示踪剂回收率达到88.45%以上,可判断其为主补给通道。此通道经“投料+注浆”封堵治理后,涌水点水量由2.4万m3/d降至500m3/d,大幅降低了矿山排水费用,保障了安全生产。研究结果表明:连通试验在岩溶管道流充水矿山导水通道探查方面具有较好的适用性,是查明导水通道与矿坑涌水点连通性和补给量的可靠技术手段,能够为于国内面临水患威胁的大水矿山防治水工作提供技术指导。
中文关键词:大水矿山  矿坑涌水  连通试验  岩溶通道  帷幕注浆
 
Study on Connectivity of Karst Water Conduction Channel in the Process of Gushing Water Sealing in Mine
Abstract:Affected by the heterogeneity of karst development in aquifers, the exploration of the spatial distribution of water-sinking water-conducting channels in large water mines is technically difficult, and it is difficult to formulate mine water prevention and control schemes.Background of a mine water gushing control project in strong karst area, hydraulic connection between karst channel exposed by grouting hole and water inflow point in mine was studied through connectivity test. On the basis of calibrating the relationship between conductivity of water sample and salt concentration, the proportion of inflow point in the source of recharge of karst channel is calculated. The test results show that the karst passage is well connected with the maximum water inflow point at -30m level. The tracer recovery rate is over 88.45%, it can be judged that the tracer is the main recharge channel, but it has poor connectivity with the water inrush point at -70m level. After the channel is blocked by " dropping aggregate + grouting", the water inflow at the -30m level inflow point decreased from 24000 m3/d to 500 m3/d. The mine drainage costs have been greatly reduced, and safe production has been guaranteed. The research results show that the connectivity test has good applicability in the exploration of the water guiding channel of the karst pipeline filling mine, and it is a reliable technical means to find out the connectivity and recharge of the water guiding channel and the mine gushing point. Provide technical guidance for water prevention and control work in large water mines threatened by flooding.
keywords:Big water mine  Pit water  Connectivity test  Karst channels  Curtain grouting
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