Study on the Influence of Stress Relief in Close-Distance Coal Seam Goaf and Roadway Excavation Disturbance on Surrounding Rock

Study on the Influence of Stress Relief in Close-Distance Coal Seam Goaf and Roadway Excavation Disturbance on Surrounding Rock | 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 the Influence of Stress Relief in Close-Distance Coal Seam Goaf and Roadway Excavation Disturbance on Surrounding Rock Zenghui Liu, Minjun CHEN This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8548795/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 05 Mar, 2026 Read the published version in Scientific Reports → Version 1 posted 10 You are reading this latest preprint version Abstract To investigate the influence of pressure relief in close-distance coal seam goaf and roadway excavation disturbance on surrounding rock stability, this study takes the large-section open-off cut of Ⅱ8224N as the research object and employs methods including RQD rock mass quality evaluation, FLAC3D numerical simulation, similar material simulation experiment, and field borehole camera observation. The results show that: The RQD rock mass quality evaluation indicates that the immediate roof siltstone (thickness: 3.8m) and the fine sandstone in the lower part of the main roof are classified as medium-quality Grade Ⅲ rock mass, while the fine sandstone in the upper part of the main roof and the mudstone at the floor of No. 73 coal seam are extremely poor Grade Ⅴ rock mass; The goaf of No. 73 coal seam exerts a significant pressure relief effect on the surrounding rock of the Ⅱ8224 open-off cut, which is located in a pressure relief zone with a pressure range of 2.5ཞ5.0MPa. A 3m-wide non-plastic failure zone exists between the goaf floor and the open-off cut roof, and no plastic failure occurs within the 7.4m anchorage range of the cable bolts. The rock bolt zone on the roof is a tensile stress zone, while the cable bolt zone is a compressive stress zone; After the excavation of the open-off cut, a new surrounding rock bearing layer is formed between the open-off cut and the goaf. Stepwise excavation induces secondary stress disturbance in the roof surrounding rock, and after roadway formation, the stress continues to increase with the most concentrated tensile stress in the middle part; The similar material simulation experiment shows that the roof of No. 73 coal seam fully collapses when the load exceeds 6.60kN, with caving angles of 65°and 60° respectively. The stress of the goaf floor converts to tensile stress after 300 minutes and tends to stabilize after 1200 minutes; Field borehole camera observation reveals that the overall integrity of the roof surrounding rock is good, with only a small number of circumferential fractures. The research results provide a certain theoretical basis and technical support for the surrounding rock control of large-section open-off cuts under close-distance goaf conditions. Physical sciences/Energy science and technology Physical sciences/Engineering Earth and environmental sciences/Solid earth sciences Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 05 Mar, 2026 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 27 Jan, 2026 Reviews received at journal 23 Jan, 2026 Reviewers agreed at journal 19 Jan, 2026 Reviews received at journal 19 Jan, 2026 Reviewers agreed at journal 19 Jan, 2026 Reviewers invited by journal 19 Jan, 2026 Editor invited by journal 16 Jan, 2026 Editor assigned by journal 10 Jan, 2026 Submission checks completed at journal 09 Jan, 2026 First submitted to journal 09 Jan, 2026 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-8548795","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":577181977,"identity":"e3001847-04ed-4741-a495-4c227e72d7b6","order_by":0,"name":"Zenghui Liu","email":"","orcid":"","institution":"Anhui University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Zenghui","middleName":"","lastName":"Liu","suffix":""},{"id":577181981,"identity":"91134733-6f1a-411d-95a2-ebea01caef52","order_by":1,"name":"Minjun 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Stepwise excavation induces secondary stress disturbance in the roof surrounding rock, and after roadway formation, the stress continues to increase with the most concentrated tensile stress in the middle part; The similar material simulation experiment shows that the roof of No. 73 coal seam fully collapses when the load exceeds 6.60kN, with caving angles of 65\u0026deg;and 60\u0026deg; respectively. The stress of the goaf floor converts to tensile stress after 300 minutes and tends to stabilize after 1200 minutes; Field borehole camera observation reveals that the overall integrity of the roof surrounding rock is good, with only a small number of circumferential fractures. The research results provide a certain theoretical basis and technical support for the surrounding rock control of large-section open-off cuts under close-distance goaf conditions.\u003c/p\u003e","manuscriptTitle":"Study on the Influence of Stress Relief in Close-Distance Coal Seam Goaf and Roadway Excavation Disturbance on Surrounding Rock","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-01-21 15:27:32","doi":"10.21203/rs.3.rs-8548795/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2026-01-27T06:33:52+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2026-01-24T02:30:07+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"108628358062347020818903513221725511825","date":"2026-01-20T03:36:10+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2026-01-20T03:25:23+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"255653614360049775411218414684393274201","date":"2026-01-19T14:02:42+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2026-01-19T05:17:44+00:00","index":"","fulltext":""},{"type":"editorInvited","content":"","date":"2026-01-16T06:19:51+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2026-01-10T12:22:43+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2026-01-09T12:49:56+00:00","index":"","fulltext":""},{"type":"submitted","content":"Scientific Reports","date":"2026-01-09T12:41:07+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":"f06bdd7c-b8ad-4c1f-98ef-e1972bf46bc1","owner":[],"postedDate":"January 21st, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[{"id":61406015,"name":"Physical sciences/Energy science and technology"},{"id":61406016,"name":"Physical sciences/Engineering"},{"id":61406017,"name":"Earth and environmental sciences/Solid earth sciences"}],"tags":[],"updatedAt":"2026-03-09T16:15:47+00:00","versionOfRecord":{"articleIdentity":"rs-8548795","link":"https://doi.org/10.1038/s41598-026-40469-8","journal":{"identity":"scientific-reports","isVorOnly":false,"title":"Scientific Reports"},"publishedOn":"2026-03-05 16:00:08","publishedOnDateReadable":"March 5th, 2026"},"versionCreatedAt":"2026-01-21 15:27:32","video":"","vorDoi":"10.1038/s41598-026-40469-8","vorDoiUrl":"https://doi.org/10.1038/s41598-026-40469-8","workflowStages":[]},"version":"v1","identity":"rs-8548795","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-8548795","identity":"rs-8548795","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}