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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.docx

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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 Abstract Softrockroadwayisanimportantpartofundergroundengineering,butitispronetodeformationandfailureduetotheinfluenceofdynamicpressure.Thepurposeofthisstudyistoinvestigatethedeformationandfailuremechanismofsoftrockroadwayunderdynamicpressureandexploretherepairtechnology.Themid-termreportmainlyintroducestheresearchprogressandpreliminaryresultsoftheproject. Keywords:softrockroadway,dynamicpressure,deformationandfailuremechanism,repairtechnology. Introduction Withthedeepeningofundergroundmining,thesoftrockroadwayisincreasinglybecominganimportantpartofundergroundengineering.Softrockroadwayischaracterizedbylowstrength,highdeformationandeasytobedamaged.Theinfluenceofdynamicpressureisoneofthemainfactorsleadingtothedeformationandfailureofsoftrockroadway.Therefore,itisofgreatpracticalsignificancetostudythedeformationandfailuremechanismofsoftrockroadwayunderdynamicpressureandexploretherepairtechnology. ResearchProgress 1.LiteratureReview Throughliteraturereview,itisfoundthatthedeformationandfailuremechanismofsoftrockroadwayunderdynamicpressureisrelatedtothegeologicalconditions,loadingmode,loadingintensity,loadinghistoryandotherfactors.Generally,thedeformationandfailureofsoftrockroadwayunderdynamicpressurecanbedividedintotwostages:initialdeformationandpost-peakdeformation.Theinitialdeformationismainlycausedbytheredistributionofstress,whilethepost-peakdeformationiscausedbytheaccumulationofdamage. 2.ExperimentalStudy Inordertoinvestigatethedeformationandfailuremechanismofsoftrockroadwayunderdynamicpressure,aseriesoflaboratoryexperimentshavebeencarriedout.Theresultsshowthatthedeformationofsoftrockroadwayunderdynamicpressureismainlyaffectedbytheloadingintensityandloadingrate.Underthesameloadingintensity,thedeformationofsoftrockroadwayunderdynamicpressureisgreaterthanthatunderstaticpressure.Underthesameloadingrate,thedeformationofsoftrockroadwayunderdynamicpressureisgreaterthanthatunderquasi-staticpressure. 3.NumericalSimulation Inordertofurtherstudythed