Influence of deep synclinal structures and residual coal pillars on roadway deformation behavior and control measures

Influence of deep synclinal structures and residual coal pillars on roadway deformation behavior and control measures | 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 Influence of deep synclinal structures and residual coal pillars on roadway deformation behavior and control measures Wanli Guo, Xiaofei Chen, Xiangyu Kong, Jiting Liu, Huijie Wang, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7764529/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 To investigate the complex roadway stress environment arising from the coupled influence of deep synclinal structures and remnant coal pillars, we established a mechanical model to characterize the stress concentration zone induced by the pillars, with the 4301 working face of the Dongtan Coal Mine serving as the engineering background. Comparative numerical simulations under different pillar–roadway offsets were then performed, which elucidated the evolution of the stress field and the deformation behavior of the surrounding rock under the combined effects of synclinal structures and remnant pillars. The results indicate that the roof stress rises markedly as the roadway advances into the synclinal core, reaching 2.1 times that observed in non-synclinal regions. The superimposed influence of remnant coal pillars further amplifies the extent of roof stress concentration. Specifically, when the horizontal offset between the pillar and the roadway is 11.75 m, the roof stress peaks at 18.46 MPa—1.23 times the in-situ stress—thereby exacerbating the instability of the surrounding rock. Building on this work, field comparative tests of different support schemes were conducted. The results demonstrate that full-cable support effectively restrains surrounding rock deformation, reducing roof and rib displacements by factors of 4.03 and 1.77, respectively, and significantly outperforming conventional bolt–cable combined support. These findings furnish both a scientific basis and practical guidance for the stability control of roadway surrounding rock in closely spaced coal seams under complex structural conditions. Physical sciences/Energy science and technology Physical sciences/Engineering Earth and environmental sciences/Solid earth sciences Synclinal structure Residual coal pillar Close distance excavation roadway Stress distribution Surrounding rock control Full Text Additional Declarations No competing interests reported. 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-7764529","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":534859418,"identity":"cb368729-2b3f-4004-9e55-57682ff902a8","order_by":0,"name":"Wanli Guo","email":"","orcid":"","institution":"Dongtan Coal Mine, Yan kuang Energy Group Co. Ltd.","correspondingAuthor":false,"prefix":"","firstName":"Wanli","middleName":"","lastName":"Guo","suffix":""},{"id":534859419,"identity":"09c7ebab-32cb-48e4-87b5-427d19d54d8e","order_by":1,"name":"Xiaofei Chen","email":"","orcid":"","institution":"Dongtan Coal Mine, Yan kuang Energy Group Co. 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measures","fulltext":[],"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":true,"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":"Synclinal structure, Residual coal pillar, Close distance excavation roadway, Stress distribution, Surrounding rock control","lastPublishedDoi":"10.21203/rs.3.rs-7764529/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7764529/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eTo investigate the complex roadway stress environment arising from the coupled influence of deep synclinal structures and remnant coal pillars, we established a mechanical model to characterize the stress concentration zone induced by the pillars, with the 4301 working face of the Dongtan Coal Mine serving as the engineering background. Comparative numerical simulations under different pillar\u0026ndash;roadway offsets were then performed, which elucidated the evolution of the stress field and the deformation behavior of the surrounding rock under the combined effects of synclinal structures and remnant pillars. The results indicate that the roof stress rises markedly as the roadway advances into the synclinal core, reaching 2.1 times that observed in non-synclinal regions. The superimposed influence of remnant coal pillars further amplifies the extent of roof stress concentration. Specifically, when the horizontal offset between the pillar and the roadway is 11.75 m, the roof stress peaks at 18.46 MPa\u0026mdash;1.23 times the in-situ stress\u0026mdash;thereby exacerbating the instability of the surrounding rock. Building on this work, field comparative tests of different support schemes were conducted. The results demonstrate that full-cable support effectively restrains surrounding rock deformation, reducing roof and rib displacements by factors of 4.03 and 1.77, respectively, and significantly outperforming conventional bolt\u0026ndash;cable combined support. These findings furnish both a scientific basis and practical guidance for the stability control of roadway surrounding rock in closely spaced coal seams under complex structural conditions.\u003c/p\u003e","manuscriptTitle":"Influence of deep synclinal structures and residual coal pillars on roadway deformation behavior and control measures","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-10-29 15:14:57","doi":"10.21203/rs.3.rs-7764529/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":"06d464de-e507-4542-8d24-5437ef3eab6c","owner":[],"postedDate":"October 29th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":56866680,"name":"Physical sciences/Energy science and technology"},{"id":56866681,"name":"Physical sciences/Engineering"},{"id":56866682,"name":"Earth and environmental sciences/Solid earth sciences"}],"tags":[],"updatedAt":"2025-11-18T06:23:57+00:00","versionOfRecord":[],"versionCreatedAt":"2025-10-29 15:14:57","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-7764529","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7764529","identity":"rs-7764529","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}