孔家沟煤矿水文地球化学特征及水源识别研究

Research on hydrogeochemical characteristics and water source identification of Kongjiagou Coal Mine

为了研究倾斜煤层矿井水水化学基本特征及水源,判断识别矿区补给水源及井下的排泄点,构建水源识别模型。结合孔家沟煤矿开拓开采及涌水实际,共布设了14个水样采集点,通过水样采集、检测及分析,并使用Piper三线图和Durov图,研究矿井开采区域的地下水水化学特征及与TDS、pH值之间的关系。通过对水样进行来源、分组判断,得出该区域地下水呈弱酸性,TDS、pH值相对较小,水化学特性以Ca-Mg-SO4-HCO3、Na-HCO3-SO4型为主。研究成果可为矿区的水源动态特征识别提供理论指导。

In order to study the hydrogeochemical characteristics of water sources in inclined coal seam mines,determine and identify mine water supply and underground drainage points,a water source identification model was constructed.Combined with the development of Kongjiagou Coal Mine and the actual water inflow,14 water sample collection points were set up in this paper.Through water sample collection,detection and analysis,the Piper three-line diagram and Durov diagram were used to study the groundwater hydrochemical characteristics,relationship between TDS and pH.By judging the source and grouping of water samples,it was concluded that groundwater in this area is weakly acidic water,low TDS and pH,the groundwater water chemical type is mainly Ca-Mg-SO4-HCO3 type and Na-HCO3-SO4 type.The research results have practical significance for the water source identification in the mining area.