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利用Piper三线图、Schoeller图和分层聚类分析等方法研究了纳林河二号煤矿延安组地下水化学特征,结果表明:延安组地下水矿化度为9134.2 mg/L,个别已达到盐水浓度;硬度为1163.8 mg/L,是极硬水的6倍;由于含水层中石膏和岩盐的溶解,导致水中以Na+和SO42-离子为主,浓度分别为2458.6 mg/L和5668.6 mg/L;SO42-和Cl-已超过地下水质量三级标准。以3-1煤层为分隔层,其上下部含水层中水存在较明显的水化学差异,即3-1煤层下部含水层中Cl-浓度增加、Mg2+浓度降低;另外,3-1底板水存在与顶板水水质相似的水样点,表明该取水点可能存在与上部含水层导通的地质构造。
The groundwater chemical features of Yan’an Formation in No.2 Coal Mine of Nailin River were studied by Piper ’s three - line diagram, Schoeller plot and hierarchical clustering analysis. The results showed that the salinity of groundwater in Yan’an Formation was 9134.2 mg / L, Hardness is 1163.8 mg / L, which is 6 times that of hard water. Due to the dissolution of gypsum and rock salt in the aquifer, Na + and SO42- ions are mainly present in the water with concentrations of 2458.6 mg / L and 5668.6 mg / L, respectively. SO42- And Cl- have exceeded the third grade of groundwater quality standards. 3-1 coal seam as the separation layer, the upper and lower aquifers in the water there is a more obvious water chemical differences, that is, 3-1 lower coal seam aquifer Cl- concentration increases, Mg2 concentration decreased; In addition, the 3-1 floor water exists Water samples with water quality similar to that of the roof indicate that there may be some geological structure that conducts to the upper aquifer.