Study on The Change Law of Wave Velocity and Porosity of Triaxial Loaded Coal

Study on The Change Law of Wave Velocity and Porosity of Triaxial Loaded Coal | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Study on The Change Law of Wave Velocity and Porosity of Triaxial Loaded Coal donghui li, yanxia liang, shiqiang chen, kai zhang This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-23575/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract The mechanical properties of loaded coal time to time, so that the voice wave propagation in coal changes with it. In order to study the relationship between the wave velocity of coal and its mechanical properties.The ultrasonic testing system was used to calculate the wave velocity of loaded coal at different times through laboratory triaxial loading test.The relationship between the wave velocity of loaded coal-body and the confining pressure of different coaxial pressures was analyzed.The results show that the wave velocity is positively correlated with the axial pressure under the same confining pressure. By calculating the variation of wave velocity of different loaded coal bodies. it is concluded that the variation of wave velocity of coal bodies can reflect the mechanical state of coal bodies undergo the compaction stage, the elastic stage and the new stage of crevasse. At the same time, the change of wave velocity in coal is affected by the porosity of the pressure-bearing coal-boby. Porosity was calculated using stress-strain.It was found that porosity and axial pressure presented a good negative correlation under the same confining pressure, and the change in wave velocity is exactly right opposite to the porosity change trend diagram.It can be obtained that the larger the amplitude of wave velocity change is, the smaller the porosity change is, and the smaller the amplitude of wave velocity change is, the larger the porosity change of coal body is, which is consistent with the actual analysis. It verifies the different the pressure-bearing coal-boby change in wave velocity to the feasibility of analyzing the mechanical condition of the loaded coal body. making the analysis more persuasive. It provides basis for coal body bearing and safe mining. Energy Engineering Triaxial loading Wave velocity stress-strain porosity Mechanical properties Figures Figure 1 Figure 2 Figure 3 Full Text Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-23575","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research","associatedPublications":[],"authors":[{"id":513568,"identity":"7cad6f18-fcc2-46fc-8ad3-584f531a1530","order_by":1,"name":"donghui 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11:27:28","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-23575/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-23575/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":988164,"identity":"7c48afaf-2e94-4dde-b1a8-328a7c8984fb","added_by":"auto","created_at":"2020-04-28 16:32:28","extension":"jpg","order_by":1,"title":"Figure 1","display":"","copyAsset":false,"role":"figure","size":1300004,"visible":true,"origin":"","legend":"1-1Coal reservoir fracturing simulation and physical properties of the test system. 1-2 Test component diagram of stress and strain of coal body. 1-3 Coal cleat system and coal sample after drilling","description":"","filename":"1.jpg","url":"https://assets-eu.researchsquare.com/files/rs-23575/v1/1.jpg"},{"id":988166,"identity":"d339de05-13c8-4226-85ea-40d9018da054","added_by":"auto","created_at":"2020-04-28 16:32:29","extension":"jpg","order_by":2,"title":"Figure 2","display":"","copyAsset":false,"role":"figure","size":1113961,"visible":true,"origin":"","legend":"2-1 Wave velocity, stress-strain curves and wave velocity variations at X, Y and Z axes at 1Mpa. 2-2 Wave velocity, stress-strain curves and wave velocity variations at X, Y and Z axes at 1MPa. 2-3 Wave velocity, stress-strain curves and wave velocity variation at X, Y and Z axes at the confining of 1MPa","description":"","filename":"2.jpg","url":"https://assets-eu.researchsquare.com/files/rs-23575/v1/2.jpg"},{"id":988167,"identity":"d5a66dff-deaf-4fdb-845b-ab3cb81e828e","added_by":"auto","created_at":"2020-04-28 16:32:29","extension":"jpg","order_by":3,"title":"Figure 3","display":"","copyAsset":false,"role":"figure","size":1379511,"visible":true,"origin":"","legend":"3-1 Wave velocity change and pore change at the confining pressure of 1MPa. 3-2 Wave velocity change and pore change at the confining pressure of 3MPa. 3-3 Wave velocity change and pore change at the confining pressure 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PDF\u003c/a\u003e.\u003c/p\u003e"}],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":false,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Triaxial loading, Wave velocity, stress-strain, porosity, Mechanical 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In order to study the relationship between the wave velocity of coal and its mechanical properties.The ultrasonic testing system was used to calculate the wave velocity of loaded coal at different times through laboratory triaxial loading test.The relationship between the wave velocity of loaded coal-body and the confining pressure of different coaxial pressures was analyzed.The results show that the wave velocity is positively correlated with the axial pressure under the same confining pressure. By calculating the variation of wave velocity of different loaded coal bodies. it is concluded that the variation of wave velocity of coal bodies can reflect the mechanical state of coal bodies undergo the compaction stage, the elastic stage and the new stage of crevasse. At the same time, the change of wave velocity in coal is affected by the porosity of the pressure-bearing coal-boby. Porosity was calculated using stress-strain.It was found that porosity and axial pressure presented a good negative correlation under the same confining pressure, and the change in wave velocity is exactly right opposite to the porosity change trend diagram.It can be obtained that the larger the amplitude of wave velocity change is, the smaller the porosity change is, and the smaller the amplitude of wave velocity change is, the larger the porosity change of coal body is, which is consistent with the actual analysis. It verifies the different the pressure-bearing coal-boby change in wave velocity to the feasibility of analyzing the mechanical condition of the loaded coal body. making the analysis more persuasive. It provides basis for coal body bearing and safe mining.\u003c/p\u003e","manuscriptTitle":"Study on The Change Law of Wave Velocity and Porosity of Triaxial Loaded Coal","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2020-04-28 16:32:26","doi":"10.21203/rs.3.rs-23575/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"b7de5a76-b21c-439a-bd6e-3f9472a5c580","owner":[],"postedDate":"April 28th, 2020","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":90310,"name":"Energy Engineering"}],"tags":[],"updatedAt":"2020-05-29T02:59:48+00:00","versionOfRecord":[],"versionCreatedAt":"2020-04-28 16:32:26","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-23575","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-23575","identity":"rs-23575","version":["v1"]},"buildId":"WrCJVZZCHTDjtuVLN7oU0","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}