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节理走向角度对爆炸应力波传播影响的试验研究 Title:ExperimentalStudyontheInfluenceofJointOrientationAnglesonthePropagationofExplosiveStressWaves Introduction: Explosivestresswavesplayacrucialroleinvariousengineeringapplications,rangingfromminingandtunnelingtomilitaryoperations.Understandingthepropagationcharacteristicsofthesestresswavesisvitalfordesigningstructuresthatcanresistsuchforces.Onefactorthatsignificantlyaffectsthepropagationofthestresswavesistheorientationanglesofthejointsorrockdiscontinuitiesinthemedium.Thispaperpresentsanexperimentalstudyinvestigatingtheinfluenceofjointorientationanglesonthepropagationofexplosivestresswaves. Methodology: Theexperimentalstudyinvolvestwomainsteps:thepreparationofsamplesandthemeasurementofstresswavepropagation.Forthisstudy,cylindricalrocksampleswerepreparedbycarefullycuttingthemfromthenaturallyoccurringrockformations.Thesampleswerethenmachinedtoobtainasmoothcylindricalshapewithalength-to-diameterratiosuitablefortheexperimentation.Tocreatejointswithinthesamples,anartificialmaterialwithsimilarmechanicalpropertiestotherockwasused.Sixsampleswereprepared,eachwithdifferentjointorientationangles:0°,30°,60°,90°,120°,and150°. Thestresswavepropagationwasmeasuredusingahigh-speeddataacquisitionsystem.Beforetheexperiment,straingaugeswereattachedtothesurfaceoftherocksamplesatspecificlocations.Thesestraingaugeswerecapableofmeasuringthedynamicstraininducedbythestresswavesastheypropagatedthroughthesamples.Theexplosiveswerecarefullyplacedatapredeterminedlocationalongtheaxisofthecylindricalsamples.Detonatingcordswereusedtoensurepreciseinitiationoftheexplosivesforaccuratetimingofthestresswavearrivalatdifferentlocationsonthesamplesurface. ResultsandDiscussion: Theexperimentalresultsrevealedinterestingfindingsregardingtheinfluenceofjointorientationanglesonthepropagationofexplosivestresswaves.Thepeakstressamplitudeandarrivaltimeofthestresswavewerefoundtobesignificantlyaffectedbytheangle.Itwasobservedthatforjointorientationanglesof0°and180°(paralleltothedirectionofstres