淮南顾北矿F104断层两侧岩溶水化学形成机制及导隔水性评价

利用断层两盘岩溶水化学特征判断其导隔水性对于我国华北型煤田水害防治具有十分重要的实践意义。以顾北矿F₁₀₄断层两侧太原组岩溶地下水为研究对象，在分析断层两盘水文地质条件基础上，采用Piper三线图、离子组合比和主成分法，分析了主要组分来源及水-岩作用差异性，并采用PHREEQC软件对岩溶地下水进行反向水化学模拟。结果表明:南北区岩溶水均存在方解石和白云石的溶解和沉淀现象，南区阳离子交换吸附和脱硫酸作用程度强于北区，而北区黄铁矿氧化和岩盐溶解作用较南区明显，南北两区水化学环境及水-岩作用存在显著差异，进而推断F₁₀₄断层具有较好的阻水性，且影响了其两侧的氧化-还原环境及温度差异，控制着地下水径流方向和水-岩作用程度。 

Hydrochemical formation mechanism and transmissivity-impermeability analysis of karst groundwater on both sides of fault F104 in Gubei coal mine in Huainan

It is of great practical significance for the prevention and control of groudwater hazards in North China type coalfield to judge transmissivity-impermeability of faults by using karst hydrochemical characteristics of two fault walls.Taking karst groundwater of Taiyuan Formation on both sides of fault F104 in Gubei coal mine as the research object,and based on the analysis of the hydrogeological conditions of two fault walls,main components sources and water-rock interaction differences were analyzed by using Piper trilinear diagram,ion combination ratio and principal component methods.Reverse hydrochemical simulation of karst groundwater was conducted by using PHREEQC software.Research results show that dissolution and precipitation of calcite and dolomite exist in the north and south areas;cation exchange and desulfurization in the south region are stronger than that in the north area;while oxidation of pyrite and dissolution of salt rock in the north area is more obvious than those in the south area;there are significant differences in the hydrochemical environment and water-rock interaction between the two areas.It is inferred that fault F104 has a preferably water-resistance,and affects the oxidation-reduction environment and temperature differences of the two areas,which controlling the direction of groundwater runoff and the degree of water-rock interaction.