动压影响软岩巷道变形破坏机理及修复技术研究的中期报告AbstractSoftrockroadwayisanimportantpartofundergroundengineering,butitispronetodeformationandfailureduetotheinfluenceofdynamicpressure.Thepurposeofthisstudyistoinvestigatethedeformationandfailuremechanismofsoftrockroadwayunderdynamicpressureandexploretherepairtechnology.Themid-termreportmainlyintroducestheresearchprogressandpreliminaryresultsoftheproject.Keywords:softrockroadway,dynamicpressure,deformationandfailuremechanism,repairtechnology.IntroductionWiththedeepeningofundergroundmining,thesoftrockroadwayisincreasinglybecominganimportantpartofundergroundengineering.Softrockroadwayischaracterizedbylowstrength,highdeformationandeasytobedamaged.Theinfluenceofdynamicpressureisoneofthemainfactorsleadingtothedeformationandfailureofsoftrockroadway.Therefore,itisofgreatpracticalsignificancetostudythedeformationandfailuremechanismofsoftrockroadwayunderdynamicpressureandexploretherepairtechnology.ResearchProgress1.LiteratureReviewThroughliteraturereview,itisfoundthatthedeformationandfailuremechanismofsoftrockroadwayunderdynamicpressureisrelatedtothegeologicalconditions,loadingmode,loadingintensity,loadinghistoryandotherfactors.Generally,thedeformationandfailureofsoftrockroadwayunderdynamicpressurecanbedividedintotwostages:initialdeformationandpost-peakdeformation.Theinitialdeformationismainlycausedbytheredistributionofstress,whilethepost-peakdeformationiscausedbytheaccumulationofdamage.2.ExperimentalStudyInordertoinvestigatethedeformationandfailuremechanismofsoftrockroadwayunderdynamicpressure,aseriesoflaboratoryexperimentshavebeencarriedout.Theresultsshowthatthedeformationofsoftrockroadwayunderdynamicpressureismainlyaffectedbytheloadingintensityandloadingrate.Underthesameloadingintensity,thedeformationofsoftrockroadwayunderdynamicpressureisgreaterthanthatunderstaticpressure.Underthesameloadingrate,thedeformationofsoftrockroadwayunderdynamicpressureisgreaterthanthatunderquasi-staticpressure.3.NumericalSimulationInordertofurtherstudythed