六里冲磷石膏堆填场岩溶地下水调查与现场示踪试验  

Investigation of karst groundwater and field tracer tests in Liulichong phosphogypsum storage

作　　者：赵志豪 王孔伟 周准 刘士元 ZHAO Zhi-hao;WANG Kong-wei;ZHOU Zhun;LIU Shi-yuan(Key Laboratory of Geological Hazards on Three Gorges Reservoir Area,Ministry of Education,China Three Gorges University)

机构地区：[1]三峡库区地质灾害教育部重点实验室(三峡大学),443002

出　　处：《灾害与防治工程》2021年第1期11-20,共10页Disaster and Control Engineering

基　　金：国家自然科学基金重点项目(U2034203)与《湖北贮源环保磷石膏集中库项目》联合资助。

摘　　要：建立磷石資资源集中库,以堆填的方式处理解决磷工业废弃物是目前的主要方法,磷石資集中库的建立对库区水文地质条件有着极高的要求,避免对库区地下水环境造成污染。本文以宜都市枝城镇六里冲磷石膏堆填场为例,综合利用钻井对比分析、野外水文地质调查、高密度电法勘察成果、岩溶地下水示踪试验等方法,查明研究区岩溶地下水流向及岩溶管道的结构特征。研究结果表明:研究区水文地质单元可以划分为上部灰岩水文地质单元和下部灰岩水文地质单元,两者间无水力联系;场区内发育一具有走滑性质的逆断层构造(淹水淌断裂),是研究区岩溶管道形成的主控因素;研究区地下水流速缓慢,岩溶发育程度相对一致,岩溶发育特征为裂隙、小型管道、局部溶洞并存;存在着以涌水点(水文地质点3)到泉水出水口(水文地质点2)北东70°方向的主径流带。At present,it is the main method to build a concentrated phosphogypsum storage and dispose the waste from the phosphogypsum industry by means of landfill.The establishment of a concentrated phosphogypsum storage has a very high requirement for the hydrogeological conditions,so as to avoid the pollution to the groundwater environment of the storage.Taking Liulichong phosphogypsum Landfill in Zhicheng Town of Yidu City as an example,this paper makes comprehensive use of drilling comparative analysis,field hydrogeological survey,high-density electrical survey results,karst groundwater tracer test to find out the karst groundwater flow direction and karst channel structure characteristics in the study area.The results show that the hydrogeological units in the study area can be divided into upper limestone hydrogeological units and lower limestone hydrogeological units,and there is no hydraulic connection between them.There is a strike-slip reverse fault structure in the field,which is the main controlling factor for the formation of karst channel in the study area.The karst development in the study area is dominated by fissures,the flow rate of groundwater is slow,and the degree of karst development is relatively uniform,and the characteristics of karst development are coexistence of fissures,channel and local karst caves.There is a main runoff zone from the water gushing point(hydrogeological point 3)to the outlet(hydrogeological point 2)in the direction of 70°NE.

关 键 词：磷石膏集中库 水文地质条件 地下水 示踪试验 

分 类 号：P64[天文地球—地质矿产勘探]