Research on hydrochemical evolution mechanism of groundwater in mining area based on reverse hydrogeochemical simulation
WANG Zijian
WANG Hu
DENG Shiqiang
Abstract：The ion proportional coefficient method was used to analyze the hydrochemical composition characteristics of the phreatic water in the two different directions of the flow in a mining area in Ti-bet.Combined with the lithology of the aquifer in the mine area,it was determined that mineral com-ponents should be added to the hydrogeochemical simulation process.PHREEQC software was used to identify hydrogeochemical reactions in two different runoff directions of groundwater in mining areas.Simulation settlement showed that along the groundwater path1,from the upstream to the middle reaches of Rongna Trench,the precipitation of gypsum,sodium feldspar and potassium feldspar,the dissolution of calcium feldspar and alternating adsorption of cation sorption had occurred.Along the path2,from the northeast side of the mining area to Rongna Trench,the precipitation of gypsum,rock salt,dolomite and sodium feldspar,the dissolution of potassium feldspar,calcium feldspar,py-rite and hematite,and cation alternating adsorption reactions occurred.This study of the chemical e-volution mechanism of phreatic water in mining areas is of great significance for the analysis of the laws affecting the hydrogeochemical evolution of phreatic water in Tibet.
Keywords：PHREEQChydrogeochemical evolutionhydrogeochemical simulationwater-rock
Publication Date：2023-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 58-62 )