湖北某抽水蓄能电站建设中地下河系统多元信息综合分析评价  

Comprehensive analysis and evaluation of the multi-information on the underground river system in construction of a pumped-storage hydropower station in Hubei

作　　者：曹建文[1,2] 杨海洋 王喆 赵良杰[1,2] 林玉山 栾崧[1,2] 李录娟 CAO Jianwen;YANG Haiyang;WANG Zhe;ZHAO Liangjie;LIN Yushan;LUAN Song;LI Lujuan(Institute of Karst Geology,CAGS/Key Laboratory of Karst Dynamics,MNR&GZAR/International Research Center on Karst under the Auspices of UNESCO,Guilin,Guangxi 541004,China;Pingguo Guangxi,Karst Ecosystem,National Observation and Research Station,Pingguo,Guangxi 531406,Chinaa;Zhongnan Engineering Corporation Limited,Changsha,Hunan 410014,China)

机构地区：[1]中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室/联合国教科文组织国际岩溶研究中心,广西桂林541004 [2]广西平果喀斯特生态系统国家野外科学观测研究站,广西平果531406 [3]中南勘测设计研究院有限公司,湖南长沙410014

出　　处：《中国岩溶》2023年第4期699-710,共12页Carsologica Sinica

基　　金：中国地质调查局地质调查项目(DD20221758);中南勘测设计研究院科技项目。

摘　　要：岩溶发育特征是岩溶区水电工程建设中必须查明的水文地质条件,岩溶渗漏问题更是工程建设成败的关键。湖北某抽水蓄能电站上水库位于岩溶洼地区,工程区地下水系统边界不清、条件不明,可能面临严重的岩溶渗漏问题,本次研究将区域构造分析、地貌成因识别、地下河追踪溯源、微动态自动化监测等多种技术手段有机结合,提取多元信息综合分析,对工程区地下河系统进行了有效识别。结果表明:上水库周边不存在隔水层及阻水构造,子良坪背斜控制了地下水系统的基本格局;地下河岩溶管道具有单支管道状结构特征,南北向岩溶管道不发育,上水库存在向南西侧发生管道式渗漏的风险;上水库内垂向溶蚀作用强烈,建议进行库底土工膜全库盆防渗处理,工程蓄水后应防范可能发生的不均匀沉降和岩溶塌陷问题。China is steadfast in promoting green and low-carbon energy transformation.Playing a pivotal role in the power industry,hydropower is at the forefront of energy transformation.Developing hydropower has always been an important strategic policy for China's energy and electricity industry.The southwest area,a main karst distribution region,is mostly concentrated with water energy resources in China.With the rapid development of water conservancy and hydropower construction,reservoir engineering in karst areas is often constructed.The characteristics of karst development are hydrogeological conditions that must be identified in the construction of hydropower projects in karst areas.What’s more solving the problem of karst leakage is the key to the success of engineering construction.A pumped-storage power station in Hubei Province is prone to serious karst leakage because its upper reservoir is located in the karst depression and the boundaries,where conditions of the groundwater system are not clear.Taking the upper reservoir of the power station as a research object,this study integrates different technical methods such as regional structural analysis,identification of geomorphic causes,tracing of underground rivers and micro-dynamic automation monitoring to extract multi-information for effective identification of the underground river system in the engineering area and to conduct a comprehensive analysis of the impact mechanism of karst development on the engineering.Firstly,geological structures control the formation and movement of groundwater,as well as the direction and pattern of karst development.On the one hand,under the transformation of neotectonic movements,karst development in the study area has typical characteristics of vertical zoning,with surface karst zones,vertical karst development zones,and horizontal runoff zones developed from top to bottom.On the other hand,the secondary tension fractures at the turning point of the anticline provide space for groundwater to migrate in depth,and the wide

关 键 词：岩溶 库区渗漏 地下河系统 识别 多元信息 

分 类 号：P641[天文地球—地质矿产勘探]