芦岭矿区塌陷湖与浅层地下水水化学特征及形成机制  

Hydro-chemical Characteristics and Formation Mechanism Between Subsidence Lake and Shallow Groundwater in Luling Coal-Mining Area

作　　者：夏玉婷 张攀 王超 Xia Yuting;Zhang Pan;Wang Chao(Third Geological Team of Hubei Geological Bureau,Huanggang 438000,Hubei,China;Hubei Key Laboratory of Resources and Eco-Environment Geology,Wuhan 430034,Hubei,China)

机构地区：[1]湖北省地质局第三地质大队,湖北黄冈438000 [2]资源与生态环境地质湖北省重点实验室,湖北武汉430034

出　　处：《绿色科技》2024年第22期191-196,共6页Journal of Green Science and Technology

摘　　要：以宿南芦岭煤矿塌陷区为主要研究区,对塌陷湖和浅层地下水进行取样测试,共采集了37个样品。利用离子含量箱体图、Chadha图、Gibbs模型图及线性回归等方法,分析了塌陷湖和浅层地下水的常规水化学特征、水岩作用机理和环境稳定同位素水文地球化学特征。结果表明:水常规组分及Chadha图分析了研究区水体水化学类型主要是NaHCO_(3)型,主要受离子交换作用的影响。相关性分析和Gibbs图结果表明,塌陷湖和浅层地下水化学特征的形成主要源自岩石风化作用,水质成分主要来自硅酸盐岩风化和蒸发岩溶解作用,水中阳离子Na^(+)、Ca^(2+)和Mg^(2+)之间均有显著相关性,揭示了水岩作用机理。D、^(18)O测试结果显示:塌陷湖和浅层地下水主要受大气降水和蒸发效应影响。通过对研究区水化学特征及成因的分析,为塌陷湖、浅层地下水的补给来源提供了科学依据,同时为合理开发水资源、确保水安全提供参考。In the present research,the mining subsidence area in Luling,the southeast of Suzhou province,was selected as the main study area.37 water samples were collected from subsidence lake and shallow groundwater.In this paper,the hydro-chemical characteristics,the mechanism of water-rock interaction and environmental stable isotopes were analyzed by Box plots,Chadha diagram and Gibbs mode between subsidence lake and shallow groundwater.Results showed that almost all water samples were NaHCO_(3)type,which was within ion exchange processes.Correlation analysis and Gibbs diagram indicated that the main source of ions of waters in this area were both influenced by rock dominance and main affected by silicate weathering and evaporite dissolution through the normalized diagram.There was a significant correlation between cation Na^(+),Ca^(2+)and Mg^(2+)in the subsidence lake and shallow groundwater,revealing the mechanism of water-rock interaction.Based on the analysis results of D and 18 O,subsidence lake and shallow groundwater were influenced by atmospheric precipitation and evaporation.With the hydro-chemical tracers,the hydraulic connection between subsidence lake and groundwater in this area have been identified in detail for better understanding the hydrogeological processes,which will provide a scientific basis for the recharge sources of subsidence lake and shallow groundwater,and provide a scientific basis for the rational development of water resources and ensuring water security.

关 键 词：煤矿塌陷区 塌陷湖 浅层地下水 水化学特征 水岩作用 氢氧同位素 

分 类 号：P641[天文地球—地质矿产勘探]