Hydrogeochemistry and hydrogen and oxygen stable isotope characteristics of water in Huainan subsidence areas

以安徽淮南采煤沉陷积水为研究对象，通过样品采集与测试，研究不同沉陷年限及类型积水水文地球化学和氢氧稳定同位素组成特征及影响因素.结果表明：（1）研究区水化学类型主要为Cl-Na、HCO3·Cl-Na型，沉陷积水中常量离子主要来源于蒸发岩溶解和硅酸盐风化，受蒸发作用和人为活动的影响明显，水化学组成随沉陷时间和类型变化不大.（2）淮南大气降水线方程为：δD=8.85δ18O+18.73，沉陷区积水氢氧稳定同位素值在淮南大气降水线右下方依次分布并接近降水线，表明沉陷积水主要来源于大气降水.（3）在降水稀释、水体蒸发及地下水补给的作用下，随着沉陷年限的增加，积水中重同位素越来越贫化，同一年限不同类型的积水同位素值变化较小.;Taking the coal mining subsidence water in Huainan, Anhui Province as research object, through sample collection and testing, hydrogeochemistry, hydrogen oxygen stable isotopic composition characteristics influencing factors of different years types are studied. The results show that:(1) main chemistry study area Cl-Na HCO3·Cl-Na. major ions sedimentation mainly come from evaporite dissolution silicate weathering, affected by evaporation human activities. Obviously, chemical does not change much with time type subsidence. (2) Huainan atmospheric precipitation line equation is:δD=8.85δ18O+18.73. values accumulated distributed sequence at lower right close to line, indicating that subsided comes precipitation. (3) Under effects dilution, evaporation, groundwater replenishment, increase period, heavy isotopes become more depleted. same age have little change, which is isotopes.