Study on Migration and Pollution in Shallow Groundwater Near a Slag Field

Abstract

This paper investigates contaminant migration in groundwater near tail slag through large-scale three-dimensional numerical simulation, comparison of numerical simulation results and test results and prediction on the status and scope of groundwater pollution, to provide a scientific theory basis for management of the tailings. It supposes that a 2D simulation model should be used for inverse analysis to get key saturated permeability coefficients for large-scale, three-dimensional numerical simulation. The key parameters of the materials used in dispersion calculations should be identified based on unsaturated material dispersion test results and empirical values in geotechnical engineering. The comparison results show that the numerical simulation results basically agree well with the test results, so that numerical simulation can be used as the basis of groundwater environmental evaluation. As time goes on, the arsenic concentration in the slag field migrates outward slowly, but the concentration in the groundwater does not exceed 0.00001 kg/m3.