新上海一号井田水文地球化学特征及控制因素

Hydrogeochemical characteristics and main controlling factors of Xinshanghai No.1 coal field

为了掌握新上海一号井田水文地球化学特征,利用地质勘探和水文地质补充勘探水化学资料进行分析,并绘制了地下水Piper、Durov和Schoeller图,结合针对各含水层开展的水文地质试验,查明了井田各含水层地下水水化学在垂向上和平面上的特征,并明确了其控制因素。结果表明:潜水含水层地下水水化学类型多种多样,承压含水层水化学类型由上至下从由SO_(4)·Cl-Na逐渐过渡为Cl·SO_(4)-Na,矿化度也是由上至下逐渐升高;在平面上各含水层水化学类型较为一致,白垩系和三叠系含水层矿化度在平面上差异不大,直罗组和宝塔山含水层由西向东地下水矿化度逐渐升高,煤系间含水层地下水矿化度没有明显规律。井田各含水层水文地球化学特征主要受地层沉积、导水断层和矿井开采因素的控制,并且在井田下组煤开拓时,导水断层和矿井开采将是影响各含水层水文地球化学变化的主要因素。新上海一号井田各含水层水文地球化学特征及控制因素的研究成果可以为矿井水害防控提供依据,也可为涌水水源判别和矿井水资源利用奠定基础。

In order to find out the hydrogeochemical characteristics of Xinshanghai NO.1 coal field,the data of geological exploration and hydrogeological exploration were analyzed,and the maps of groundwater Piper,Durov and Schoeller were carried out.Combined with the hydrogeological test of each aquifer,the hydrogeochemical characteristics of each aquifer in vertical and horizontal directions were find out,and the controlling factors were defined.The results show that there are various types of groundwater chemistry in phreatic aquifers,and the types of groundwater chemistry in confined aquifers gradually change from SO_(4)·Cl;Na to Cl·SO_(4)-Na from top to bottom,and the salinity also increases gradually from top to bottom.On the plane,the types of groundwater chemistry of aquifers are consistent,the salinity of Cretaceous and Triassic aquifers have little difference.The salinity of Zhiluo formation and Baotashan aquifers increases gradually from west to east,and the salinity of aquifers between coal seams have no obvious rule.The hydrogeochemical characteristics of each aquifer are mainly controlled by stratigraphic deposition,water-conducting faults and mining factors.The main factors affecting the hydrogeochemical characteristics change in aquifers are water-conducting fault and mining factors when the coal seam in bottom of coal field is developed.The research of hydrogeochemical characteristics and controlled factors of aquifers in Xinshanghai No.1 coal field can provide a basis for the prevention and control of water disaster,and also lay a foundation for the identification of water inflow source and utilization of mine water resources.