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3Dmodelteststudyondam- breakoftailingspondunderdrainagefailure
4
1
3
1
1,2
ZHANGLiting,MAWenjun ,LIUYafan,ZHANGShaoxiong,ZHOUDing,LIXin 1
(1.SchoolofCivilEngineering,ShijiazhuangTiedaoUniversity,Shijiazhuang 050043,China;
2.HebeiProvincialAcademyofEmergencyManagementSciences,Shijiazhuang 050000,China;
3.DepartmentofArchitecturalEngineering,ShijiazhuangUniversityofAppliedTechnology,Shijiazhuang 050000,China;
4.TongyuanInternationalEngineeringDesignResearchCo.,Ltd,Qinhuangdao 066000,China)
Abstract:Inordertoovercometheinfluenceofthe2Dtesttankedgewalleffectontheseepagedirectionandfail
urepositionoftheseepagefailuremodeoftailingspond ,atailingspondistakenasaprototypeandconductsa
modelteststudyoftailingsponddambreakinducedbythefailureofdrainagefacilitiesbasedonaself - designed3D
tailingsponddamfailuremodeltestplatform.Thefailuremodeandmechanism ofthetailingspondarerevealed.
Theresultsshowthat :(1)thedambreakcausedbydrainagefailurepresentsagradualandsuddenoutburstevolu
tionarypatternconsistingoflocalsoilflowfailure ,cumulativedeformationofdam body,deepslidingsurfacede
velopment,andoverallsuddeninstability.(2)Thesignificantchangeinporewaterpressureisakeyresponseindi
catorforseepagefailureofthedambody.Itindicatesthatthedambodywilltransformfrompartscatteredsoftening ,
soilflow,andcollapseatthefrontandrearedgesoftheslidingbodytolarge - scalecollapseinashortperiodof
time,andcanserveasaprecursortodambreakaccidents.(3)Theprocessoftailingsdambreakinducedbythe
failureofdrainagefacilitieshasthecharacteristicsofgradualandsuddenchanges.Theprocessofscatteredsoftening
andsoilflowfailuretakesalongtime ,andthetimefordeepslidingandcollapseisveryshort,whichcanprovide
referenceforthetreatmentofseepagedamagehazardsandemergencyresponsetodamcollapseintailingsponds.The
researchresultshaveimportantpracticalsignificanceforthepredictionandcontroloftailingsdamfailures.
Keywords:tailingspond;modeltesting;porewaterpressure;soilflowfailure;damcollapse
(责任编辑:耿庆斋)
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