Analysis on characteristics and mechanism for rock fracture in deep rock with cracks under dynamic-static coupling effect

Analysis on characteristics and mechanism for rock fracture in deep rock with cracks under dynamic-static coupling effect | 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 Article Analysis on characteristics and mechanism for rock fracture in deep rock with cracks under dynamic-static coupling effect Jinjin Ge, Yongqi Jia, Wei Huang, Meilu Yu, Suqian Ni, Ying Xu, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5121572/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 30 Dec, 2024 Read the published version in Scientific Reports → Version 1 posted 10 You are reading this latest preprint version Abstract In order to study the mechanical properties and fracture mechanism of deep fractured rocks under explosive dynamic loads, a Spilt Hopkinson pressure bar (SHPB) with active confining pressure loading device was used to conduct impact compression tests on rock-like specimens containing pre-existing cracks under uniaxial and triaxial stress states. The results indicate that: 1) Without confining stress, the dynamic compressive strength of crack specimen shows a pattern of decreasing first and then increasing with increasing pre-existing crack inclination angle. However, the compressive strength of crack specimens under confining pressure shows an increasing trend with the increase of pre-existing crack inclination angle, that is, it has significant confining pressure effect and strain rate effect. 2) The confining pressure constraints cause great changes in the force on specimen, which makes it difficult for the specimen to produce tensile failure along the radial direction under the axial dynamic load, and cannot preferentially produce shear failure along the axial direction. When the crack inclination Angle of rock-like specimen is 0°and 90°, the failure of specimen showed an axial tensile pattern. When the crack inclination Angle of rock-like specimen is 30°and 60°, cracks including axial tensile cracks and shear cracks are generated on it, among which axial tensile cracks are the majority. The failure of specimen is mainly caused by the combination of tension and shear. 3)Under confining pressure, the pre-existing crack angle has a significant impact on the propagation path of specimen, that is, as the angle increases, the fractal dimension D also shows an increasing trend. Moreover, there is a positive correlation between the fractal dimension of newly expanded cracks in the specimen and its impact on compression peak stress. The research results can provide references for the design of blasting parameters in deep engineering, and have important theoretical and practical significance for preventing the occurrence of disaster events caused by rock instability. Physical sciences/Engineering Physical sciences/Engineering/Civil engineering Deep rock mass Explosive loading Dynamic fracture Crack inclination angle Failure mode Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 30 Dec, 2024 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 19 Nov, 2024 Reviews received at journal 19 Nov, 2024 Reviews received at journal 08 Nov, 2024 Reviewers agreed at journal 28 Oct, 2024 Reviewers agreed at journal 21 Oct, 2024 Reviewers invited by journal 21 Oct, 2024 Editor assigned by journal 21 Oct, 2024 Editor invited by journal 09 Oct, 2024 Submission checks completed at journal 08 Oct, 2024 First submitted to journal 20 Sep, 2024 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. 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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-5121572","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":380081947,"identity":"6191941b-f88b-428c-a1f0-8c4ead87c655","order_by":0,"name":"Jinjin 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loading, Dynamic fracture, Crack inclination angle, Failure mode","lastPublishedDoi":"10.21203/rs.3.rs-5121572/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-5121572/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eIn order to study the mechanical properties and fracture mechanism of deep fractured rocks under explosive dynamic loads, a Spilt Hopkinson pressure bar (SHPB) with active confining pressure loading device was used to conduct impact compression tests on rock-like specimens containing pre-existing cracks under uniaxial and triaxial stress states. The results indicate that: 1) Without confining stress, the dynamic compressive strength of crack specimen shows a pattern of decreasing first and then increasing with increasing pre-existing crack inclination angle. However, the compressive strength of crack specimens under confining pressure shows an increasing trend with the increase of pre-existing crack inclination angle, that is, it has significant confining pressure effect and strain rate effect. 2) The confining pressure constraints cause great changes in the force on specimen, which makes it difficult for the specimen to produce tensile failure along the radial direction under the axial dynamic load, and cannot preferentially produce shear failure along the axial direction. When the crack inclination Angle of rock-like specimen is 0\u0026deg;and 90\u0026deg;, the failure of specimen showed an axial tensile pattern. When the crack inclination Angle of rock-like specimen is 30\u0026deg;and 60\u0026deg;, cracks including axial tensile cracks and shear cracks are generated on it, among which axial tensile cracks are the majority. The failure of specimen is mainly caused by the combination of tension and shear. 3)Under confining pressure, the pre-existing crack angle has a significant impact on the propagation path of specimen, that is, as the angle increases, the fractal dimension D also shows an increasing trend. Moreover, there is a positive correlation between the fractal dimension of newly expanded cracks in the specimen and its impact on compression peak stress. The research results can provide references for the design of blasting parameters in deep engineering, and have important theoretical and practical significance for preventing the occurrence of disaster events caused by rock instability.\u003c/p\u003e","manuscriptTitle":"Analysis on characteristics and mechanism for rock fracture in deep rock with cracks under dynamic-static coupling effect","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-12-10 10:30:08","doi":"10.21203/rs.3.rs-5121572/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2024-11-19T15:26:13+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2024-11-19T08:15:07+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2024-11-08T07:52:12+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"275965972705351855127509908499910135202","date":"2024-10-28T13:44:57+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"280999030840472823277272259651696073424","date":"2024-10-22T02:25:44+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2024-10-22T02:23:04+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2024-10-22T02:21:47+00:00","index":"","fulltext":""},{"type":"editorInvited","content":"","date":"2024-10-09T06:15:39+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2024-10-08T06:10:06+00:00","index":"","fulltext":""},{"type":"submitted","content":"Scientific Reports","date":"2024-09-20T07:31:51+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"scientific-reports","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"scirep","sideBox":"Learn more about [Scientific Reports](http://www.nature.com/srep/)","snPcode":"","submissionUrl":"","title":"Scientific Reports","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Scientific Reports","inReviewEnabled":true,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"2db1f4ea-a0d9-4c9d-8d82-098b00d24513","owner":[],"postedDate":"December 10th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[{"id":40477449,"name":"Physical sciences/Engineering"},{"id":40477450,"name":"Physical sciences/Engineering/Civil engineering"}],"tags":[],"updatedAt":"2025-01-06T16:00:40+00:00","versionOfRecord":{"articleIdentity":"rs-5121572","link":"https://doi.org/10.1038/s41598-024-83256-z","journal":{"identity":"scientific-reports","isVorOnly":false,"title":"Scientific Reports"},"publishedOn":"2024-12-30 15:57:18","publishedOnDateReadable":"December 30th, 2024"},"versionCreatedAt":"2024-12-10 10:30:08","video":"","vorDoi":"10.1038/s41598-024-83256-z","vorDoiUrl":"https://doi.org/10.1038/s41598-024-83256-z","workflowStages":[]},"version":"v1","identity":"rs-5121572","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-5121572","identity":"rs-5121572","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}