尹庄尾矿库动力稳定分析及溃坝风险评价技术研究

26,201012WORLDEARTHQUAKEENGINEERINGVo.l26,Supp.lDec.2010:2010-07-21;:2010-09-11:(50709031):(1979-),,,,.Emai:[e-mail]:10076069(2010)04034606李全明1,李玲2,张嘎2,王云海1(1.,100012;2.,100084):,,,,,,,,;,;;:;;;:X936;P315.959:AStudyonthedynamicstabilityanalysisanddamcollapseriskevaluationofYinzhuangtailingspondLIQuanming1,LILing2,ZHANGGa2,WANGYunhai1(1.InstituteofMineSafety,ChinaAcademyofSafetySciencesandTechnology,Beijing100012,China;2.DepartmentofHydraulicEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Inrecentyears,theissuesonsafeproductionoftailingspondsbecomethepublicandsocialproblemsinChina,andparticularly,somelargetailingspondshavebeenoperatedforseveralconsecutivedecades,thetailingspondsystem,surroundingenvironmen,tphysiography,geology,andotherconelitionsaremorecomplex.Therefore,itisofgreatsignificancetocomputetheseismiccapabilityoftailingspondsandevaluatetheriskofdamcollapse,whichhelpsfurtherreinforcethesafemanagementoftailingspondsandreducethethreatofthetailingspondstothefacilitiesintheirvicinities.ThedynamicstabilityofYinzhuangtailingspondisanalyzedtogettheclassofseismiccapabilityandsafetyofYinzhuangtailingspond,thescopeofdownstreamfloodingandthelevelofdisastercausedfromthedifferentmodesofdamcollapseofthetailingspondarequantitativelycomputed,andthecountermeasuresareputforwardtoreinforcethesafemanagementoftailingspondsafetyandfurtherreducetheriskofitsdamcollapse.Keywords:tailingponds;damstability;riskevaluation;safetyproduction,[1],,,200898,,277,4,19m3,2.5km,:20043,5;20059,17;200612,57;200714,56;200818,320[2]2Rosner,Mascaro,Mohd[3-5]Harper,Hughes,Scott[6-8],,,,[9,10],[11],[12]Shamoto[13,14],Bagnold2050[15]2070~80,,[16,17],,,;1150.0m,,41.5m;150.0m,,18.8m;180.0m,,7m,10232.3m3,208,150.0m,37.0m,385m,11.8,12,22.1,,1,173,1Table1Parametersofslopestabilitycalculation/kNm-3d/kNm-3c/kPa/!122.024.080.043.0222.024.080.043.0319.520.00.538.0419.020.018.017.0517.418.01.028.0616.817.51.030.01Fig.1Distributionofsoillayers347,:2.2,,∀#,:Ei=CiKcWi(1):Ei,;tC,C=0.25;i;Kc,,Kc=a/g,2;Wii,t2Table2Horizontalearthquakeparameters/!7890.10.20.43Table3Resultsofslopestabilitycalculation1.321.441.321.361.601.772.37,32~5,2Fig.2Arcslideofdownstreamslope3Fig.3Brokenlineslideofdownstreamslope4Fig.4Entirelyarcslide5Fig.5Entirelybrokenlineslide33.1,,,,,,3.1.1,,,,:!=K(dudy)n(2)34826:K,nn1,n=1,,n1,[9]:!=!y+K(dudy)(3):!y;KBingham,Bingham(),,,,23.1.2:∀#∀t+∀#ui∀xi=0(4):∀#ui∀t+∀∀xj(#uiuj)=-∀#∀xi+∀∀xj(∃+∃t)(∀ui∀xj+∀uj∀xi)+#Bi(5)k:∀(#k)∀t+∀(#uik)∀xi=∀∀xj(∃+∃t%k)∀k∀xj+G-#&(6)&:∀(#&)∀t+∀(#ui&)∀xi=∀∀xj(∃+∃t%&)∀&∀xj+C1&&kGk-G*2&#&2k(7):#∃,;P;Bi;∃t,k&:∃=(Kn-1+!y/)/#(8)=12(∋:∋)1/2∋=0.5∀ui∀xj+∀uj∀xi(9)∃t=∃1+C∃∃k&2(10):G,:G=∃t(∀ui∀xj+∀uj∀xi)∀ui∀xj(11)C*2&∃C2&+C∃#(3(1-(/(0)1+)(3,(=Sk/&,S=2SijSij,Sij=12∀ui∀xj+∀uj∀xi(12)44Table4Parametersofcontrolequations(0)C∃C2&%kKn!y%&4.380.0120.0851.680.71790.0240.70.9230.7179349,:6Fig.6DambreakhydrographofYinzhuangDam3.2,,,202m,2%108m3,,6,202m,,2.6%108kg/s,2%108m3,250s7840s100s,,,,,,1min,0.3m8,,100s,2~4m740sFig.7Inundatedareaafter40s8100sFig.8Inundatedareaafter100s4,:(1),,,,,,(2),,(3),,,5,,35026,3,,,;,;,[1]StrachanC.TailingsdamperformancefromUSCOLDincidentsurveydata[J].MiningEngineering,2001,53(3):49-53.[2],,.[J].,2008,4(2):53-56.[3]RosnerT,VanSchalkwykA.TheenvironmentalimpactofgoldminetailingsfootprintsintheJohannesburgregion,SouthAfrica[J].BulletinofEngineeringGeologyandEnvironment,2000,59(2):137-148.[4]MascaroI.MinewastesatthepolymetallicdepositofFeniceCapanne(southernTuscany,Italy)mineralogy,geochemistry,andenvironmentalimpact[J].EnvironmentGeology,2001,41(4):417-429.[5]AzizliMK,KimKyoungwoong.CharacteristicsoftailingsfromtheclosedmetalminesaspotentialcontaminationsourceinSouthKorea[J].EnvironmentalGeology,2001,41(3):358-364.[6]HarperTGS,McLeodHN,DaviesMP.Seismicassessmentoftailingsdams[J].CivilEngineering,1992,62(12):64-66.[7]HughesHE.WarmspringPonds:Superfoundsuccess[J].MiningEngineering,1996,48(11):27-30.[8]ScottMD,LoRC.OptmaltailingsmanagementatHighlandValleyCopper[J].CIMBulletin,1992,85(962):85-88.[9],,.[J].,2006,27(9):1527-1532.[10],,,.[J].,2007,5(6):12-16.[11],,.[J].,2005,19(3):1-4.[12],,,.[J].,2004,20(4):131-134.[13]ShamotoY,ZhangJM,TokimatsuK.Newmethodsforevaluatinglargeresidualpostliquefactiongroundsettlementandhorizontaldisplacement[J].SoilsandFoundations,1998,38(S2):69-84.[14]ShamotoY,ZhangJM,TokimatsuK.Newchartsforpredictinglargeresidualpostliquefactiongrounddeformation[J].SoilDynamicsandEarthquakeEngineering,1998,17(2):427-438.[15]BagnoldRA.ExperimentsonagravityfreedispersionoflargesolidsphereinaNewtonianfluidundershear[J].ProcRSoc,London,SerA,1954,225(2):100-123.[16]HirtCW,NicholsBD.Volumeoffluid(VOF)methodforthedynamicsoffreeboundaries[J].JournalofComputationalPhysics,1981,39(2):201-225.[17]MiyataH.Finitedifferencesimulationofbreakingwaves[J].JournalofComputationalPhysics,1986,65(3):179-187.351,: