Effects of Coal Gangue on the Hydrochemical Components under Different Types of Site Karst Water in Closed Mines

In order to explore the potential effects of abandoned coal mines on water quality Ordovician limestone aquifers, water-rock interaction simulations were conducted. After closure mine, karst in goaf area and waste gangue had a geochemical reaction, above-mentioned process was simulated by an indoor static immersion experiment differences effect different types dissolution gangue. The basic parameters pH, EC (electrical conductance), ORP (oxidation-reduction potential) showed trends hydro-immersion solution ultra-pure solution; pH greater fluctuations two sets ultrapure solutions, while fluctuated more widely three groups solutions. addition, minerals dissolved significantly bodies where added. results chemical component clustering that TDS (total solids) homopolymerized each solution, subsequent correlation analysis clusters affected mineral properties water-immersion dominant ions