复杂矿床三维可视化建模关键技术-荆永滨-刘晓明-毕林

459()Vol.45No.920149JournalofCentralSouthUniversity(ScienceandTechnology)Sept.2014122(1.4511912.410083)(OBB)Feito–TorresTD672TP391.72A1672−7207(2014)09−3104−07Keytechniquesfor3DvisualmodelingofcomplexmineraldepositsJINGYongbin1,LIUXiaoming2,BILin2(1.SchoolofSafetyEngineering,HenanEngineeringInstitute,Zhengzhou451191,China;2.SchoolofResourcesandSafetyEngineering,CentralSouthUniversity,Changsha410083,China)Abstract:Topresentthespatialshapeandgradedistributionofcomplexmineraldepositin3Dspaceandtoestablishthereal3Dgeologicalenvironmentofcomplexmineraldeposit,thekeytechniquesforbuildingcomplexdepositmodelingandvisualizationsystemwerediscussed.Anumberofsophisticatedalgorithmswereimplementedtointegratethedepositsurfacemodelandblockmodeltoanewschemeofhybridmodel.3Dboreholemodelwascreatedbymulti-sourceexplorationdata.Asurfacemodelofdepositwasreconstructedthroughtilingmethodfromplanarcontourlines.Robustconversionmethodofblockmodelfromcomplexdepositmodelwasproposed.Anoctreewithforcesubdivisionwasusedasdatastructureofblockmodelwithsubdivisionblocksontheboundary.OBBcollisiondetectionandFeito-Torresalgorithmwereemployedfortheintersecttestandinclusiontestbetweenablockandsurfacemodel.Oregradesofcellswithinblockmodelwereestimatedbygeostatisticaltechniques.Throughtheabovetechniques,the3Dgeologicalenvironmentofcomplexsurfacemodelandblockmodelofcomplexdepositcanbebuiltrapidlyandaccurately.Soasavisualandrealisticopendatasourceofmineraldepositforvariousminingactivitiesisprovided.Keywords:complexdepositmodeling;three-dimensionalvisualization;blockmodel;gradeestimation20902013−11−222014−03−20(13B440925)(2012M511417)(1981−)15188387323E-mail:[e-mail]93105(Gocad,Lynx,EarthVision)GIS[1][2−3]1122.11Fig.1Workflowfor3Dvisualmodelingofcomplexmineraldeposits42.2[4−5]xyzx0y0z0()45310622Fig.23Dmodelofboreholes33[6]333.122[6−7]43Fig.3Surfacemodelingfromcontourlinesofcomplexorebody4Fig.4Orientedcycleoftilingtorepresenttrianglemesh12423.22mnm≠nmn09310755Fig.5Intermediatecontourlinesofbranchesbuiltbymedialaxis4[8−10]4.12[8][9,11]4.266Fig.6Algorithmforbuildingoctreeblockmodel(OBB)[12]()453108OBBOBBOBBOBBBSP[13]Feito–Torres[10]Feito–Torres[13−14]+1−1+0005[15−16]77Fig.7Workflowforgradeestimationofblockmodelusinggeostatisticmethod6I1I2I3348898m8m2m22m2m0.5m1011931098Fig.8Surfacemodelsoffaultsatminingarea9Fig.93Dmodelofcopperdeposit10Fig.10Blockmodeloforebodywithestimatedcoppergradevalue11Fig.11Sliceofhybridmodelcomposedofsurfacemodelandblockmodel71)2)3)4):[1]ZanchiA,DonatisMD,GibbsA,etal.Imaginggeologyin3D[J].Computers&Geosciences,2009,35(1):1−3.[2],,,.[J].:,2012,43(1):272−277.XIONGShumin,WANGLiguan,HUANGJunxin,etal.Parametricdatamodelforundergroundmine3Dvisualproductionmanagementandcontrolsystem[J].JournalofCentralSouthUniversity:ScienceandTechnology,2012,43(1):272−277.[3],,.[J].(),2008,39(3):423−428.ZHOUZhiyong,CHENJianhong,YANGLibing3Dvisualizationmodelingongeologicalandminingengineeringinalarge-sizedmine[J].JournalofCentralSouthUniversity(ScienceandTechnology),2008,39(3):423−428.[4],,,.Hoops[J].,2011,27(3):38−41.FENGZhidong,ZHOUXiaojiang,LUCaiwu,etal.Aresearchon3Dvisualizationofdrillingsbasedonhoops[J].GeographyandGeo-InformationScience,2011,27(3):38−41.[5],,.[J].:,2011,38(1):22−24.LIJing,ZHANGJinchang,CHENXiaoli.Newmodelfor()453110drillingtrajectorycalculationingeo-exploration[J].ExplorationEngineering:Rock&SoilDrillingandTunneling,2011,38(1):22−24.[6]MeyersD,SkinnerS,SloanK.Surfacesfromcontours[J].ACMTransactionsonGraphics,1992,11(3):228−258.[7]FuchsH,KedemZM,UseltonSP.Optimalsurfacereconstructionfromplanarcontours[J].CommunicationsoftheACM,1977,20(10):693−702.[8],,,.[J].,2007,16(6):72−74.WANGEnde,SUNLishung,MAOYachun,etal.Onekindofthevectorgridhybridmodelbeingsuitablefororebodyreservecalculation[J].ChinaMiningMagazine.2007,16(6):72−74.[9],,,.[J].,2008,37(4):532−537.BILin,WANGLiguan,CHENJianhong,etal.Studyofoctree-basedblockmodelofcomplexgeologicalbodies[J].JournalofChinaUniversityofMiningandTechnology,2008,37(4):532−537.[10],,,.[J].(),2010,38(2):97−100.JINGYongbin,WANGLiguan,BILin,etal.Robustcreationofblockmodelfromcomplexorebodymodel[J].JournalofHuazhongUniversityofScienceandTechnology(NatureScienceEdition),2010,38(2):97−100.[11]MeleroFJ,CanoP,TorresJC.Bounding-planesOctree:Anewvolume-basedLODscheme[J].Computers&Graphics,2008,32(4):385−392.[12]GottschalkS,LinMC,ManochaD.OBBTree:Ahierarchicalstructureforrapidinterferencedetection[C]//Proceedingsofthe23rdannualconferenceonComputergraphicsandinteractivetechniques.NewYork,USA:ACMPress,1996:171−180.[13]OgayarCJ,SeguraRJ,FeitoFR.Pointinsolidstrategies[J].Computers&Graphics,2005,29(4):616−624.[14]FeitoFR,TorresJC.Inclusiontestforgeneralpolyhedra[J].Computers&Graphics,1997,21(1):23−30.[15],./[J].,2001,37(6):61−66.HOUJingru,HUANGJingxian.Applicationofgeostatisticsinclassificationforresources/reservesofsolidfuelsandmineralcommodities[J].GeologyandProspecting,2001,37(6):61−66.[16]AliAkbarD.ReserveestimationofcentralpartofChoghartnorthanomalyironoredepositthroughordinarykrigingmethod[J].Int