numerical simulation and prediction of mine water a case study in dangtu county of anhui province

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1、NumericalSimulationandPredictionofMineWaterACaseStudyinDangtuCountyofAnhuiProvince　　【Abstract】Inthispaper，theregionalgroundwaterflowsysteminZhongJiuironorewasgeneralizedintothree-dimensionalunsteadygroundwaterflowsystemswithhomogeneous，isotropicandnoboundarylimits.ThesoftwareofVisua

2、lMODFLOWwasusedtosimulateandpredictthegushingprocess.theconclusionwasthatthecalibratedparameterswerereasonableandthepredictedvaluecansatisfythedemandoftheconsumptionofmining.　　【Keywords】ZhongJiuironore，Hydrogeologicalconditions，VisualMODFLOW，Numericalsimulation，Waterinflowpredicting

3、.　　Numericalmethodincludesfoursteps：hydrogeologicalmodelconceptualization，buildingmathematicalmodel，modelcalibration，minewaterinflowpredictingect.　　1TheEstablishmentoftheHydrogeologicalConceptualModel　　Themineareawasinwater-bearingmediumthathasnoobviouswaterboundary，therearemanyclea

4、rdifferencesamongdifferentwater-bearingrockgroupsoreventhesameones，buttherearestillsomehydraulicconnections.So，theanisotropyaquifermediumthat6above-370metersinminingareawasidentifiedastheflowfield，whichisisotropicandhasnoconfinedboundary.　　Inordertoreflectthegeologicfeature，theaquif

5、ersweregeneralizedinto10layers.Thesimulatedrangewas143km2aroundthemine.Theboundarywasgeneralizedasgeneralheadboundaryandthesimulationareawasregardedasheterogeneousisotropic.ThegroundwaterflowwasdefinedastransientflowthatobeytheDarcy'slaw.　　2TheDeterminationofInitialConditions　　Thein

6、itialflowfieldwasdrawnbasedonthedateofthewaterlevelindecember2009，Thetenaquifergroupshaddifferentinitialflowfieldsbecauseoftheminordifferencesamongthemandtheminorgroundwaterexploitationquantities.　　3MathematicalModelofGroundwaterFlow　　3.1Discretization　　Inspace，accordingtogeological

7、structurecharacteristics，hydrauliccharacteristics，flowfieldcharacteristics，simulationaccuracyandtheboundarycondition，twogroupsoforthogonalgridby11kmx13kmwhichareparalleltoxaxisandyaxisdividedthestudyareainto14300activecellswhichrepresenttheactualplanararea.　　Intime，thesimulationtime

8、was7thdecember2009t