顾桥矿北二采区地下水化学特征分析

Analysis of groundwater chemical characteristics in the second mining area of Guridge Mine

地下水是重要的饮水水源之一,然而,煤矿开采影响了自然条件下地下水化学性质,也引发一系列突水灾害事故,大大影响了煤矿生产安全。为了研究各地下含水层水化学特征,采用了水化学分析方法和主成分分析法,对淮南顾桥煤矿多含水层系统的主要离子水样数据进行分析。结果表明,整个地下含水层系统PH值变化范围是7.80~8.85,平均值为8.24,各含水层pH变异系数较小,范围在0.02~0.03内,属于弱碱性环境。研究区水文地球化学过程由溶解、脱硫和阳离子交换三个子过程组成,K^(+)+Na^(+)和Mg^(2+)两种离子是TDS的主要来源。

Groundwater is one of the important drinking water sources.However,coal mining has affected the chemical properties of groundwater under natural conditions,and also triggered a series of water inrush disaster accidents,which greatly affected the safety of coal mine production.In order to study the water chemistry characteristics of the lower aquifers in various regions,the water ion analysis method and principal component analysis method were used to analyze the main ionized water sample data of the multi-aquifer system in Gu bridge Coal Mine of Huainan.The results show that the pH value of the entire underground aquifer system varies from 7.80 to 8.85,with an average value of 8.24,and the pH coefficient of each aquifer is small,ranging from 0.02 to 0.03,belonging to a weakly alkaline environment.The hydrogeochemical process in the study area is composed of three sub-processes of dissolution,desulfurization and positive ionexchange.K^(+)+Na^(+)and Mg^(2+)ions are the main sources of TDS.