Study on static expansive fracturing for pressure relief and rockburst prevention in coal seam boreholes

Study on static expansive fracturing for pressure relief and rockburst prevention in coal seam boreholes | 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 Study on static expansive fracturing for pressure relief and rockburst prevention in coal seam boreholes Wenyu Lyu, Xinxin Zhou, Zhenhua Ouyang, Yongping Wu, Panshi Xie, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7291806/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 12 Nov, 2025 Read the published version in Scientific Reports → Version 1 posted 10 You are reading this latest preprint version Abstract Addressing the insufficient pressure relief in the deep coal mass and the deterioration of the surrounding rock bearing structure due to increased borehole diameter in conventional borehole pressure relief techniques, a static expansive fracturing method for pressure relief in coal seam boreholes is proposed. A critical stress model for static expansive fracturing in coal seam boreholes is established through theoretical analysis, and numerical simulations are conducted to compare and analyze the differences between this method and conventional borehole pressure relief techniques in terms of roadway pressure relief effect and surrounding rock stability control. The results indicate that using a 150 mm borehole with a 75MPa expansive stress achieves a comparable state of full pressure relief in the rib coal as a 250 mm borehole, while increasing the pressure relief range in the deep coal mass by a factor of approximately 3.6. Although conventional borehole pressure relief methods can enhance pressure relief by increasing the borehole diameter, they significantly expand the plastic zone in the shallow surrounding rock, aggravating surrounding rock deformation. In contrast, the static expansive fracturing method for pressure relief in coal seam boreholes actively directs fractures in the deep high-stress coal mass, promoting the expansion and interconnection of its plastic zone to form a deep structural weakening zone, while markedly reducing the disturbance and damage to the shallow surrounding rock. This method breaks through the limitations of passive borehole expansion for pressure relief, offering dual advantages of efficient deep pressure relief and shallow surrounding rock stability protection, and providing a new approach for rockburst prevention. Physical sciences/Energy science and technology Physical sciences/Engineering Earth and environmental sciences/Solid earth sciences Conventional borehole pressure relief Static expansive fracturing Deep coal seam pressure relief Surrounding rock stability control Rockburst prevention Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 12 Nov, 2025 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 11 Sep, 2025 Reviews received at journal 09 Sep, 2025 Reviewers agreed at journal 01 Sep, 2025 Reviews received at journal 24 Aug, 2025 Reviewers agreed at journal 17 Aug, 2025 Reviewers invited by journal 12 Aug, 2025 Editor assigned by journal 12 Aug, 2025 Editor invited by journal 12 Aug, 2025 Submission checks completed at journal 08 Aug, 2025 First submitted to journal 08 Aug, 2025 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-7291806","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":501454720,"identity":"fc8b6f34-7522-4616-af0f-b3f2adf3d15f","order_by":0,"name":"Wenyu Lyu","email":"","orcid":"","institution":"Xi'an University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Wenyu","middleName":"","lastName":"Lyu","suffix":""},{"id":501454721,"identity":"a65814e7-24eb-4b47-9b96-3649dd7bd4e7","order_by":1,"name":"Xinxin Zhou","email":"","orcid":"","institution":"Xi'an University of Science and 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Reports","inReviewEnabled":true,"inReviewRevisionsEnabled":true},"keywords":"Conventional borehole pressure relief, Static expansive fracturing, Deep coal seam pressure relief, Surrounding rock stability control, Rockburst prevention","lastPublishedDoi":"10.21203/rs.3.rs-7291806/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7291806/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eAddressing the insufficient pressure relief in the deep coal mass and the deterioration of the surrounding rock bearing structure due to increased borehole diameter in conventional borehole pressure relief techniques, a static expansive fracturing method for pressure relief in coal seam boreholes is proposed. A critical stress model for static expansive fracturing in coal seam boreholes is established through theoretical analysis, and numerical simulations are conducted to compare and analyze the differences between this method and conventional borehole pressure relief techniques in terms of roadway pressure relief effect and surrounding rock stability control. The results indicate that using a 150 mm borehole with a 75MPa expansive stress achieves a comparable state of full pressure relief in the rib coal as a 250 mm borehole, while increasing the pressure relief range in the deep coal mass by a factor of approximately 3.6. Although conventional borehole pressure relief methods can enhance pressure relief by increasing the borehole diameter, they significantly expand the plastic zone in the shallow surrounding rock, aggravating surrounding rock deformation. In contrast, the static expansive fracturing method for pressure relief in coal seam boreholes actively directs fractures in the deep high-stress coal mass, promoting the expansion and interconnection of its plastic zone to form a deep structural weakening zone, while markedly reducing the disturbance and damage to the shallow surrounding rock. This method breaks through the limitations of passive borehole expansion for pressure relief, offering dual advantages of efficient deep pressure relief and shallow surrounding rock stability protection, and providing a new approach for rockburst prevention.\u003c/p\u003e","manuscriptTitle":"Study on static expansive fracturing for pressure relief and rockburst prevention in coal seam boreholes","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-08-20 09:27:58","doi":"10.21203/rs.3.rs-7291806/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2025-09-11T13:24:43+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2025-09-09T10:02:41+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"245118325587264775549644351444412603075","date":"2025-09-01T10:23:27+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2025-08-24T09:22:10+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"35649890135177392577491480848242485257","date":"2025-08-17T10:09:47+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2025-08-13T03:07:15+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2025-08-12T06:07:02+00:00","index":"","fulltext":""},{"type":"editorInvited","content":"","date":"2025-08-12T06:00:18+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2025-08-08T13:55:16+00:00","index":"","fulltext":""},{"type":"submitted","content":"Scientific Reports","date":"2025-08-08T13:51:02+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":"f1c5af00-86f9-4ff9-abb4-d35d26dbba66","owner":[],"postedDate":"August 20th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[{"id":53260503,"name":"Physical sciences/Energy science and technology"},{"id":53260504,"name":"Physical sciences/Engineering"},{"id":53260505,"name":"Earth and environmental sciences/Solid earth sciences"}],"tags":[],"updatedAt":"2025-11-17T15:59:15+00:00","versionOfRecord":{"articleIdentity":"rs-7291806","link":"https://doi.org/10.1038/s41598-025-23374-4","journal":{"identity":"scientific-reports","isVorOnly":false,"title":"Scientific Reports"},"publishedOn":"2025-11-12 15:56:56","publishedOnDateReadable":"November 12th, 2025"},"versionCreatedAt":"2025-08-20 09:27:58","video":"","vorDoi":"10.1038/s41598-025-23374-4","vorDoiUrl":"https://doi.org/10.1038/s41598-025-23374-4","workflowStages":[]},"version":"v1","identity":"rs-7291806","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7291806","identity":"rs-7291806","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}