Study on the damage and seepage characteristics of water-saturated coal by microwave cycling

Study on the damage and seepage characteristics of water-saturated coal by microwave cycling | 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 damage and seepage characteristics of water-saturated coal by microwave cycling Qi Xiaohan, Liu Xiaodong, Ma Heng, Liu Zhonghua, Xie Wenkun, Zhang Ying, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4531496/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 30 Jul, 2024 Read the published version in Scientific Reports → Version 1 posted 10 You are reading this latest preprint version Abstract To investigate the extent of damage and seepage characteristics of water-saturated coal samples after subjecting them to microwave cycling. The microwave equipment was used to process the coal samples by microwave cycling. The non-contact digital image processing technology and acoustic emission system were used to carry out the triaxial loading experimental study of the coal samples to obtain the mechanical parameter characteristics, energy evolution pattern, acoustic emission information and permeability characteristics of coal samples under different microwave cycle times. The results of the study show that: With the increase in the number of microwave cycles, dense grid-loaded cracks gradually appeared on the surface of the coal samples, the triaxial partial stresses of the coal samples decreased, and the strains also decreased, and the modulus of elasticity and Poisson's ratio also decreased; In the densification stage stage, the dissipated energy is higher than the elastic energy, and as the elastic stage proceeds, the elastic energy gradually reverses to exceed the dissipated energy, and the total energy and elastic energy of the coal samples decrease with the increase in the number of cycles, and the dissipated energy rises; Coal samples produce a large number of fissures due to the increase in the number of microwave cycles, the more frequent the fissure activity during the loading process, the acoustic emission amplitude and ringing count scattering points all become dense with the increase in the number of cycles, and the data increase; Initial permeability, destructive permeability and average permeability were all increased, microwave treatment has a better effect of permeability enhancement, the permeability of the treated coal samples was changed from low permeability to medium permeability, and the permeability enhancement was the largest in 6 cycles, and the permeability was increased by 7.18 times. This article explores the damage condition of water-saturated coal samples under microwave cycling treatment. Then, it explores the effect of microwave cycling on the permeability enhancement of the coal body, which provides a new method for exploring the gas permeability enhancement and extraction of low-permeability coal samples underground. Physical sciences/Energy science and technology Physical sciences/Engineering Non-contact digital image processing microwave cycle mechanical property energy evolution acoustic emission permeability Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 30 Jul, 2024 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 14 Jul, 2024 Reviews received at journal 13 Jul, 2024 Reviewers agreed at journal 24 Jun, 2024 Reviews received at journal 19 Jun, 2024 Reviewers agreed at journal 14 Jun, 2024 Reviewers invited by journal 08 Jun, 2024 Editor assigned by journal 07 Jun, 2024 Editor invited by journal 07 Jun, 2024 Submission checks completed at journal 07 Jun, 2024 First submitted to journal 05 Jun, 2024 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-4531496","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":316369917,"identity":"73749f27-b3c9-496e-a7f9-90383ad6410d","order_by":0,"name":"Qi Xiaohan","email":"","orcid":"","institution":"Liaoning Technical University","correspondingAuthor":false,"prefix":"","firstName":"Qi","middleName":"","lastName":"Xiaohan","suffix":""},{"id":316369921,"identity":"e75ec2ee-3cd4-4f3e-b00f-e678ddd189f5","order_by":1,"name":"Liu 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The microwave equipment was used to process the coal samples by microwave cycling. The non-contact digital image processing technology and acoustic emission system were used to carry out the triaxial loading experimental study of the coal samples to obtain the mechanical parameter characteristics, energy evolution pattern, acoustic emission information and permeability characteristics of coal samples under different microwave cycle times. The results of the study show that: With the increase in the number of microwave cycles, dense grid-loaded cracks gradually appeared on the surface of the coal samples, the triaxial partial stresses of the coal samples decreased, and the strains also decreased, and the modulus of elasticity and Poisson's ratio also decreased; In the densification stage stage, the dissipated energy is higher than the elastic energy, and as the elastic stage proceeds, the elastic energy gradually reverses to exceed the dissipated energy, and the total energy and elastic energy of the coal samples decrease with the increase in the number of cycles, and the dissipated energy rises; Coal samples produce a large number of fissures due to the increase in the number of microwave cycles, the more frequent the fissure activity during the loading process, the acoustic emission amplitude and ringing count scattering points all become dense with the increase in the number of cycles, and the data increase; Initial permeability, destructive permeability and average permeability were all increased, microwave treatment has a better effect of permeability enhancement, the permeability of the treated coal samples was changed from low permeability to medium permeability, and the permeability enhancement was the largest in 6 cycles, and the permeability was increased by 7.18 times. This article explores the damage condition of water-saturated coal samples under microwave cycling treatment. Then, it explores the effect of microwave cycling on the permeability enhancement of the coal body, which provides a new method for exploring the gas permeability enhancement and extraction of low-permeability coal samples underground.\u003c/p\u003e","manuscriptTitle":"Study on the damage and seepage characteristics of water-saturated coal by microwave cycling","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-06-21 09:17:58","doi":"10.21203/rs.3.rs-4531496/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2024-07-14T10:59:13+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2024-07-13T13:58:31+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"329430401248134794862514343023710076238","date":"2024-06-24T08:34:11+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2024-06-19T06:42:43+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"198385241113367951381640026543944411265","date":"2024-06-15T02:06:01+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2024-06-08T11:43:17+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2024-06-07T22:57:54+00:00","index":"","fulltext":""},{"type":"editorInvited","content":"","date":"2024-06-07T18:17:56+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2024-06-07T09:09:04+00:00","index":"","fulltext":""},{"type":"submitted","content":"Scientific Reports","date":"2024-06-05T05:15:01+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":"276243dd-d290-49a7-968c-8803e011b713","owner":[],"postedDate":"June 21st, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[{"id":33454777,"name":"Physical sciences/Energy science and technology"},{"id":33454778,"name":"Physical sciences/Engineering"}],"tags":[],"updatedAt":"2024-08-05T16:06:59+00:00","versionOfRecord":{"articleIdentity":"rs-4531496","link":"https://doi.org/10.1038/s41598-024-68506-4","journal":{"identity":"scientific-reports","isVorOnly":false,"title":"Scientific Reports"},"publishedOn":"2024-07-30 15:58:14","publishedOnDateReadable":"July 30th, 2024"},"versionCreatedAt":"2024-06-21 09:17:58","video":"","vorDoi":"10.1038/s41598-024-68506-4","vorDoiUrl":"https://doi.org/10.1038/s41598-024-68506-4","workflowStages":[]},"version":"v1","identity":"rs-4531496","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4531496","identity":"rs-4531496","version":["v1"]},"buildId":"_2-kVJe1T_tPrBINL-cwx","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}