修正RHT模型在岩体爆破响应数值模拟中的应用

修正RHT模型在岩体爆破响应数值模拟中的应用Title: Application of RHT Model in Numerical Simulation of Rock Mass Blasting

RHT 修正模型在岩体爆破响应数值模拟中的应用 Title:ApplicationofRHTModelinNumericalSimulationofRockMassBlasting Response Abstract: Rockblastingisawidelyusedengineeringtechnique,butitoftenleadsto vibrationsandpotentialdamagetoadjacentstructures.Accuratepredictionof rockblastingresponseplaysacrucialroleinensuringthesafetyandstability ofsurroundinginfrastructure.Inthisstudy,theapplicationoftheRHT (RockblastHolisticTheory)modelinnumericalsimulationofrockmass blastingresponseisinvestigated.TheRHTmodelcombinestheadvantagesof continuummechanicsanddiscreteelementmethods,providinga comprehensiveunderstandingofthedynamicbehaviorofrockmassesduring blasting.Thispaperaimstodiscussthedevelopmentandapplicationofthe RHTmodelinsimulatingrockmassblastingresponse,includingthe theoreticalbasis,numericalimplementation,andcasestudies. 1.Introduction: Rockblastingiscommonlyemployedinavarietyoffieldssuchasmining, tunneling,andconstruction.Understandingthebehaviorofrockduring blastingisessentialtooptimizeblastdesignparametersandminimize potentialrisks.TheRHTmodel,developedasaholisticapproach,takesinto accountboththecontinuumanddiscontinuumcharacteristicsofrockmasses, makingitsuitableforsimulatingthecomplexresponseofrockmassto blasting. 2.TheoreticalBasisoftheRHTmodel: TheRHTmodelisbasedonthecombinationofcontinuummechanicsand discreteelementmethods.Continuummechanicsdescribethebehaviorof continuousmaterials,whilediscreteelementmethodsdealwiththebehavior offracturedmaterials.Byintegratingthesetwoapproaches,theRHTmodel providesacomprehensiveunderstandingoftherockmassresponse,taking intoaccountboththeelasticandinelasticdeformation,aswellasthefracture propagation. 3.NumericalImplementationoftheRHTmodel: ThenumericalimplementationoftheRHTmodelinvolvesseveralsteps.Firstly, therockmassshouldbediscretizedintosmallerelementstosimulatethe discontinuitiesandheterogeneity.Thegoverningequations,includingthe momentumbalanceequationandtheconstitutiveequations,arethenderived basedonthemodifiedcontinuummechanics.Additionally,theinteraction betweenrockparticlesisconsideredusingtheDEM(DiscreteElement Method).Finally,asuitablenumericalalgorithm,suchasthefiniteelement method,isusedtosolvetheequationsandobtainthedynamicresponseof therockmass. 4.CaseStudies: