Evolution of Fractal Dimension and Efficient Extraction of Gas in High-Permeability Zones under Mining-Induced Pressure Relief at Lvtang Coal Mine

Evolution of Fractal Dimension and Efficient Extraction of Gas in High-Permeability Zones under Mining-Induced Pressure Relief at Lvtang Coal Mine | 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 Evolution of Fractal Dimension and Efficient Extraction of Gas in High-Permeability Zones under Mining-Induced Pressure Relief at Lvtang Coal Mine Chao WANG, Ze-chen CHANG, LI Lei, Peng-xiang ZHAO, Zhu-chun WANG, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9160194/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 29 Apr, 2026 Read the published version in Scientific Reports → Version 1 posted 10 You are reading this latest preprint version Abstract Scientific Understanding of Overlying Strata Fracture Development and Distribution Characteristics of High-Permeability Zones for Pressure-Relieved Gas: A Key Approach to Optimizing Gas Drainage Location Selection. Taking the 26 Middle 06 working face in Lvtang Coal Mine as a case study, this research investigates the evolution of mining-induced fractures and high-permeability zones through physical similarity simulation and field borehole observation, leading to optimized parameters for gas drainage borehole layout. The results indicated that as the working face advanced, the periodic weighting interval ranged from 8 to 13 m, with the heights of the caved zone and fractured zone determined to be 11.7 m and 33.9 m, respectively. The distribution pattern of fractal dimension under different periodic weighting conditions was analyzed, revealing that the fractal dimension increases with the occurrence of periodic weighting and decreases with increasing height from the coal seam floor. A fractal dimension threshold of 1.2 was utilized to delineate the overlying strata fracture field into high-permeability zones for pressure-relieved gas and compacted zones. The final development height and width of the high-permeability zone were identified as 43.2 m and 21.9 m, respectively. The evolutionary process of the high-permeability zone was observed to undergo four distinct stages: "integrated region, initial emergence, cross fusion, and regional separation." A quantitative characterization equation for the high-permeability zone, based on fractal dimension, was established. Field borehole observations yielded a caved zone height of approximately 12.75 m and a fractured zone height ranging from 30.8 m to 34.2 m. Based on the experimental and observational results, borehole layout parameters were optimized and validated in the field. The optimized scheme resulted in a 30% increase in pure gas drainage volume, and the average daily power generation from gas rose from 56,605.22 kWh to 71,187.34 kWh. Physical sciences/Energy science and technology Physical sciences/Engineering Earth and environmental sciences/Solid earth sciences High-pressure relief gas hyperpermeation zone Overlying rock fractures Physically similar simulations Fractal dimension Gas power generation Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 29 Apr, 2026 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 02 Apr, 2026 Reviews received at journal 01 Apr, 2026 Reviews received at journal 01 Apr, 2026 Reviewers agreed at journal 24 Mar, 2026 Reviewers agreed at journal 24 Mar, 2026 Reviewers invited by journal 24 Mar, 2026 Editor invited by journal 24 Mar, 2026 Editor assigned by journal 19 Mar, 2026 Submission checks completed at journal 19 Mar, 2026 First submitted to journal 18 Mar, 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. 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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-9160194","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":611313808,"identity":"e1be47a1-7c20-4f16-b298-9c7f119b443b","order_by":0,"name":"Chao WANG","email":"","orcid":"","institution":"Shandong Energy Group Guizhou Mining Co., LTD","correspondingAuthor":false,"prefix":"","firstName":"Chao","middleName":"","lastName":"WANG","suffix":""},{"id":611313809,"identity":"ced3f3a9-abe3-40ea-adab-7c08078a1a69","order_by":1,"name":"Ze-chen 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hyperpermeation zone, Overlying rock fractures, Physically similar simulations Fractal dimension, Gas power generation","lastPublishedDoi":"10.21203/rs.3.rs-9160194/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-9160194/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eScientific Understanding of Overlying Strata Fracture Development and Distribution Characteristics of High-Permeability Zones for Pressure-Relieved Gas: A Key Approach to Optimizing Gas Drainage Location Selection. Taking the 26 Middle 06 working face in Lvtang Coal Mine as a case study, this research investigates the evolution of mining-induced fractures and high-permeability zones through physical similarity simulation and field borehole observation, leading to optimized parameters for gas drainage borehole layout. The results indicated that as the working face advanced, the periodic weighting interval ranged from 8 to 13 m, with the heights of the caved zone and fractured zone determined to be 11.7 m and 33.9 m, respectively. The distribution pattern of fractal dimension under different periodic weighting conditions was analyzed, revealing that the fractal dimension increases with the occurrence of periodic weighting and decreases with increasing height from the coal seam floor. A fractal dimension threshold of 1.2 was utilized to delineate the overlying strata fracture field into high-permeability zones for pressure-relieved gas and compacted zones. The final development height and width of the high-permeability zone were identified as 43.2 m and 21.9 m, respectively. The evolutionary process of the high-permeability zone was observed to undergo four distinct stages: \"integrated region, initial emergence, cross fusion, and regional separation.\" A quantitative characterization equation for the high-permeability zone, based on fractal dimension, was established. Field borehole observations yielded a caved zone height of approximately 12.75 m and a fractured zone height ranging from 30.8 m to 34.2 m. Based on the experimental and observational results, borehole layout parameters were optimized and validated in the field. The optimized scheme resulted in a 30% increase in pure gas drainage volume, and the average daily power generation from gas rose from 56,605.22 kWh to 71,187.34 kWh.\u003c/p\u003e","manuscriptTitle":"Evolution of Fractal Dimension and Efficient Extraction of Gas in High-Permeability Zones under Mining-Induced Pressure Relief at Lvtang Coal Mine","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-03-26 19:41:53","doi":"10.21203/rs.3.rs-9160194/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2026-04-02T06:29:37+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2026-04-01T15:50:35+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2026-04-01T08:34:26+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"15816794959089869325108823600930399462","date":"2026-03-24T08:48:25+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"33258120838157266928154558121004688489","date":"2026-03-24T08:28:14+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2026-03-24T08:05:46+00:00","index":"","fulltext":""},{"type":"editorInvited","content":"","date":"2026-03-24T07:29:21+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2026-03-19T07:15:58+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2026-03-19T07:15:38+00:00","index":"","fulltext":""},{"type":"submitted","content":"Scientific Reports","date":"2026-03-18T13:38:17+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":"f07f9064-b583-4899-a687-646768b7eaeb","owner":[],"postedDate":"March 26th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[{"id":65042221,"name":"Physical sciences/Energy science and technology"},{"id":65042222,"name":"Physical sciences/Engineering"},{"id":65042223,"name":"Earth and environmental sciences/Solid earth sciences"}],"tags":[],"updatedAt":"2026-05-04T16:35:42+00:00","versionOfRecord":{"articleIdentity":"rs-9160194","link":"https://doi.org/10.1038/s41598-026-50417-1","journal":{"identity":"scientific-reports","isVorOnly":false,"title":"Scientific Reports"},"publishedOn":"2026-04-29 15:58:36","publishedOnDateReadable":"April 29th, 2026"},"versionCreatedAt":"2026-03-26 19:41:53","video":"","vorDoi":"10.1038/s41598-026-50417-1","vorDoiUrl":"https://doi.org/10.1038/s41598-026-50417-1","workflowStages":[]},"version":"v1","identity":"rs-9160194","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-9160194","identity":"rs-9160194","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}