Advancement Area Control Technology for High Mine Pressure Dynamic Disasters in Thick and Hard Roofs | 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 Article Advancement Area Control Technology for High Mine Pressure Dynamic Disasters in Thick and Hard Roofs Kaige Zheng This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3369374/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 4 You are reading this latest preprint version Abstract The western mining area exhibits the superimposed development of a thick and hard roof under the continental sedimentation of multiple ancient rivers. In this case, the fully mechanized caving working face with a large mining height has a high stope pressure, which induces rock burst, mine earthquake, and hurricane in the goaf. To determine the fracture evolution characteristics of overlying strata in a fully mechanized caving mining with a large mining hard roof height, this study investigated the disaster mechanism of hard roof strata that undergo a large “cantilever beam” collapse and produce fracture impact energy. The study was based on the cantilever beam fracture theory, and the UDEC discrete element numerical simulation was used. According to the concept of partition weakening control of a hard roof, an advance weakening technology for staged fracturing of a hard roof was proposed, a mechanical model for a reasonable hanging length of a hard roof was established, and a quantitative formula for determining a reasonable hanging length of a hard roof was developed. Fracturing models under different crustal stress conditions were analyzed, including the ellipsoid fracture network perpendicular to the direction of the working face, the horizontal fracture surface network perpendicular to the direction of the working face, and the near-linear fracture surface dominated by vertical fractures. The first and second models were effective governance models for hard roof disasters. The test was performed in a typical working face, and the results showed that the average periodic weighting step of the roof after fracturing weakening decreased from 18.7 m to 8.6 m, and the weighting strength decreased by 21.67%. These results indicate effective prevention and control of high-mining-pressure disasters in a thick and hard roof. The thick and hard roof was transformed into multiple small blocks by using open-hole staged hydraulic fracturing, resulting in significantly reduced accumulated energy and energy loss during fracturing. In this way, the partition and segmented controllable fracturing length collapse of the thick and hard roof was realized, facilitating the transfer and dissipation of the roof stress as well as the effective control of dynamic disasters. Under the fracturing effect, the caving pattern and breaking degree of the near-field, low-level thick and hard roof were effectively changed, resulting in an improved scope of the working face caving zone and increased gangue filling degree in the goaf. Hence, effective suppression of the far-field strata subsidence and surface subsidence was achieved. This study provides a technical model support for the synergistic control of high-mining-pressure dynamic disasters, mine earthquakes, and surface subsidence in hard roofs. cantilever beam quantitative analysis rock burst partition weakening reasonable hanging length staged hydraulic fracturing energy loss Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Full Text Additional Declarations No competing interests reported. Tables 1 to 4 are available in the Supplementary Files section. Supplementary Files table.docx Cite Share Download PDF Status: Under Review Version 1 posted Reviewers invited by journal 03 Jan, 2024 Editor assigned by journal 01 Oct, 2023 Submission checks completed at journal 27 Sep, 2023 First submitted to journal 19 Sep, 2023 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-3369374","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":236320070,"identity":"1ea0d9bb-e44f-42f5-88f5-c91a21329d1b","order_by":0,"name":"Kaige Zheng","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA5klEQVRIie3RMYvCMBTA8VcCcal2faLodnPkINzHSSk4VdDlyCCeoNThFNfzWziJqyB1eTpnrPgFPFwc7a6YujnkN78/yUsAHOcN8WC0u1w1/iSMbTKl+/akgmmbAX1581ISiYxSe9KA+IN5Y+0tpiSrxzErcDEgfuoNkQkTSx0OOQSTX/U8YbPd52KNXJj2twnXdUDaLy2nHBSWCX1hopUJiYPAji2JBZYTRGGU7IYJK5TIWp6I6nQroViCadT6I1RB/sioKPWtuzTno0121gPF86/8v+p+I5jMnid3/NfGHcdxnIdu59ZLGkeQoO4AAAAASUVORK5CYII=","orcid":"","institution":"Xi’an Research Institute of China Coal Technology \u0026 Engineering Group Corp","correspondingAuthor":true,"submittingAuthor":false,"prefix":"","firstName":"Kaige","middleName":"","lastName":"Zheng","suffix":""}],"badges":[],"createdAt":"2023-09-19 13:29:31","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-3369374/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-3369374/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":44089535,"identity":"24063210-bf8d-4cde-968c-e7deb1ad6952","added_by":"auto","created_at":"2023-10-04 16:11:17","extension":"png","order_by":1,"title":"Figure 1","display":"","copyAsset":false,"role":"figure","size":180166,"visible":true,"origin":"","legend":"\u003cp\u003eTypical structure of hard roof in Buertai Mine in Shendong Mining Area.\u003c/p\u003e","description":"","filename":"1.png","url":"https://assets-eu.researchsquare.com/files/rs-3369374/v1/e12d1aafe0760a65e963df6f.png"},{"id":44088638,"identity":"39ee1f83-251f-4a3f-a116-72f85614cd54","added_by":"auto","created_at":"2023-10-04 16:03:17","extension":"jpg","order_by":2,"title":"Figure 2","display":"","copyAsset":false,"role":"figure","size":391318,"visible":true,"origin":"","legend":"\u003cp\u003eMicrostructural characteristics of hard roof: (a) plane-polarized light; 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16:35:26","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":2010838,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-3369374/v1_covered_66e07983-72d2-46f6-b181-5dabf3b25270.pdf"},{"id":44091098,"identity":"1a8ce311-5c02-4acf-83d8-b2338ae2a1ee","added_by":"auto","created_at":"2023-10-04 16:27:17","extension":"docx","order_by":2,"title":"","display":"","copyAsset":false,"role":"supplement","size":47785,"visible":true,"origin":"","legend":"","description":"","filename":"table.docx","url":"https://assets-eu.researchsquare.com/files/rs-3369374/v1/28b3013971c4867674f27b98.docx"}],"financialInterests":"\u003cp\u003eNo competing interests reported.\u003c/p\u003e\n\u003cp\u003eTables 1 to 4 are available in the Supplementary Files section.\u003c/p\u003e","formattedTitle":"Advancement Area Control Technology for High Mine Pressure Dynamic Disasters in Thick and Hard Roofs","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"
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