Abstract: Flexuraltopplingfailureisacomplexprocessoflandslidedisaster,onwhichtheresearches graduallybecomethekeyanddifficultpointsintheacademicfield.Takinganopen-pitmineslopefailureduetoflexuraltopplingasanexample,thisstudyattemptstointroducediscontinuousdeformationanalysismethod(DDA) tosimulatethecomplexfailureprocess.Firstly,thewaytointroduceartificial jointsintoDDAmodeltosimulatefracturingthroughtheintactrockmassesduringtheflexuraltoppling processisanalyzed.Bycomparingwiththefailurephenomenaoffieldcase,theproperwaytointroduce artificialjointsisobtained,andtheresultsconfirmDDAisapropermethodtoanalyzeflexuraltoppling failureofnumericalmethod.Thesimulationprocessshowsthatthelowerpartslopefailsfirstlybecause itisunabletosupporttheupperrocklayers,andthentheupperpartslopefailsduetothelossofthe supportfromthelowerpartslope.Theresearchonthereinforcementschemeagainstflexuraltoppling deformationoftheslopeindicatesthatifthereinforcementsdependonthestrengthoftheordinaryanchorcable,localfailureoftheanchorcablesbecomesveryeasy,whichcouldinducethefailureofthe
wholeanchorcablesfinally.