Study On The Migration Of Mn In The Leaching Water Of A Coal Gangue In Luoping, Yunnan Province In The Carboniferous Limestone

Coal gangue is the solid waste produced in the process of coal mining,if you don't have to take protective measures,a large number of bare accumulation is the earth's surface,harmful substances will be dissolved,and the roles of leaching way into groundwater,groundwater pollution in the surrounding area environment.This paper combined with actual project "the hillock reservoir project of groundwater environment impact assessment,on duty carboniferous limestone reservoir catchment area of coal gangue field leaching water migration regularity of Mn were studied.In this paper,on the basis of the existing related information collection,through a large number of field survey and hydrogeological investigation,system in this paper,the coal gangue places in the area of the geological and hydrogeological conditions.Statistical and analysis of karst depression and fissure data in the study area are obtained,and the linear relationship between the main values of the permeable tensor is obtained.Outdoor pumping test and dispersion experiment,indoor test for water and slag samples,to obtain,the dispersion coefficient of permeability coefficient and rainfall infiltration coefficient and related hydrogeological parameters.The hydrogeologic model and groundwater flow model are established by the submerged aquifer,which is enclosed by the hydrological geological unit of the zhuan river hydrogeological unit.The model is identified and validated using the long-term observed water level data and the water balance data.Select Mn as the tracer factor,and the migration model of Mn particles is established.The coal gangue is held in 2011 and is monitored for slag and water samples in 2015.The water quality of the borehole was evaluated by using single and synthetic index method.Using GMS7.1 MT3DMS modules of simulation from slag to detect Mn 1200 days during the period of migration,using borehole detecting Mn concentration fitting test,the ratio of the transverse and longitudinal dispersion coefficient uncertainty analysis.The influence of the flow direction,range and concentration of the migration direction,range and concentration of the groundwater Mn of limestone in the carboniferous was analyzed by the analysis of the permeability tensor and dispersion degree.