Page 188 - 《水资源与水工程学报》2022年第1期
P. 188

!33 " ! 1 #                       & ' ( ) & * + , -                               Vol.33No.1
               2022 $ 2 %               JournalofWaterResources&WaterEngineering                 Feb.,2022

            DOI:10.11705/j.issn.1672-643X.2022.01.26


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                 BCDEF:TV31   GHIJK:A    GLMF:1672643X(2022)01018406
               Timevaryingradialdisplacementsolutionintheplasticzoneofthecircular

               roadwayunderconstantbiaxialstressandanalysisofrockburstprevention

                                                    1
                                    1,2
                                                                  1
                                                                                  1
                                                                                               1
                         FANBaojie ,ZHAOFujun,WUQiuhong,LIUYonghong,WANGBin
            (1.SchoolofResources&EnvironmentandSafetyEngineering,HunanUniversityofScienceandTechnology,Xiangtan411201,China;
                             2.HunanInstituteofCityGeologicalSurveyandMonitoring,Changsha410000,China)
                 Abstract:Themechanicalprocessoftheelasticandplasticzoneofthesurroundingrockthatchangeover
                 timeundertheactionofconstantbiaxialstressloadisanalyzedusingthetimevaryingtheory.Aplane
                 strainmodelofthecircularroadwayisestablishedtoobtaintheelastictimevaryingsolution,elastoplastic
                 timevaryingsolutionandtimevaryingradialdisplacementsolutionintheplasticzoneusingthebilinear
                 constitutiveequationsoftheelasticzoneandplasticzone.Theresultsshowthatwhentheboundarymove
                 mentrateoftheplasticzonewasrelativelylarge ,theradialdisplacementintheplasticzoneincreased
                 withtime.Thelargertheroadwayradius ,thegreatertheradialdisplacementintheplasticzoneatthe
                 samemoment.Inessence,thetimeeffectofrockburstisthattheradialdisplacementintheplasticzone
                 ofthesurroundingrockreachesthecriticalsofteningdepth.Topreventtherockburst ,theradialdisplace
                 mentoftheplasticzoneshouldbereducedasfaraspossible.Thetimevaryingradialdisplacementsolu
                 tionintheplasticzoneprovidesanewideaforthepreventionandcontrolofrockbursts.
                 Keywords:timevaryingmechanics;circularroadwayunderconstantbiaxialstress;elastoplastictime
                 varyingsolution ;timevaryingradialdisplacementsolution;rockburstprevention
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