Study on overburden rock structure characteristics and surrounding rock control technology of island working face

Study on overburden rock structure characteristics and surrounding rock control technology of island working face | 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 overburden rock structure characteristics and surrounding rock control technology of island working face Lai Xingping, Zhu Haoyu, Qiao Hao, Shan Pengfei, Yang Wenhua, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4503715/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 03 Sep, 2024 Read the published version in Scientific Reports → Version 1 posted 10 You are reading this latest preprint version Abstract Aiming at the technical problems of safe and efficient mining under the complex conditions of strong mine pressure and multiple disasters in island working face, taking ZF2822 working face of Xiagou Coal Mine as the background, theoretical analysis, numerical simulation and field measurement are used to explore the fracture structure characteristics and surrounding rock control technology of overlying rock in island working face. The results show that the ten morphological structures of the main roof fracture can be divided into four typical symmetrical structures and six asymmetric structures. According to the stress calculation formula of the key block B to the coal pillar, the stress characteristics of the 10 structures are classified and the risk classification is carried out. Among them, the (a), (e), (f) and (g) structures belong to level I. Four typical structures (a), (b), (c) and (d) were constructed to simulate the stress and strain characteristics of surrounding rock. The overlying strata subsidence displacement values of (a), (b), (c) and (d) at the roadway are 1.75 m, 1.5 m, 0.8 m and 0.6 m respectively, and the maximum stresses are 26.6 MPa, 19.5 MPa, 15.5 MPa and 10.0 MPa respectively, (a) > (b) > (c) > (d). Therefore, the surrounding rock control technology of gob-side roadway in island working face is put forward, the fracture structure of basic roof is determined and the reasonable applicable type of gob-side roadway is selected. The results after pressure relief show that the average daily microseismic energy of ZF2822 working face after pressure relief is 0.87×10 4 J, which is about 42.38 % lower than that of April. The average stress is 1.13 MPa lower than that of the mining before the pressure relief area, and the decrease is 22.42 %. During the mining process of the working face in the pressure relief area, the average stress is 0.49 MPa lower than that before the pressure relief area, and the decrease is 9.02 %. It shows that the pressure relief has played a very good effect and provides a reference for the same type of mine. Physical sciences/Energy science and technology/Fossil fuels Physical sciences/Energy science and technology/Fossil fuels/Coal Island working face Basic roof fracture mode Stress-strain characteristics Surrounding rock control technology Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 03 Sep, 2024 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 24 Jul, 2024 Reviews received at journal 22 Jul, 2024 Reviews received at journal 14 Jul, 2024 Reviewers agreed at journal 07 Jul, 2024 Reviewers agreed at journal 04 Jul, 2024 Reviewers invited by journal 03 Jul, 2024 Editor assigned by journal 02 Jun, 2024 Editor invited by journal 01 Jun, 2024 Submission checks completed at journal 01 Jun, 2024 First submitted to journal 30 May, 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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fracture mode, Stress-strain characteristics, Surrounding rock control technology","lastPublishedDoi":"10.21203/rs.3.rs-4503715/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4503715/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eAiming at the technical problems of safe and efficient mining under the complex conditions of strong mine pressure and multiple disasters in island working face, taking ZF2822 working face of Xiagou Coal Mine as the background, theoretical analysis, numerical simulation and field measurement are used to explore the fracture structure characteristics and surrounding rock control technology of overlying rock in island working face. The results show that the ten morphological structures of the main roof fracture can be divided into four typical symmetrical structures and six asymmetric structures. According to the stress calculation formula of the key block B to the coal pillar, the stress characteristics of the 10 structures are classified and the risk classification is carried out. Among them, the (a), (e), (f) and (g) structures belong to level I. Four typical structures (a), (b), (c) and (d) were constructed to simulate the stress and strain characteristics of surrounding rock. The overlying strata subsidence displacement values of (a), (b), (c) and (d) at the roadway are 1.75 m, 1.5 m, 0.8 m and 0.6 m respectively, and the maximum stresses are 26.6 MPa, 19.5 MPa, 15.5 MPa and 10.0 MPa respectively, (a) \u0026gt; (b) \u0026gt; (c) \u0026gt; (d). Therefore, the surrounding rock control technology of gob-side roadway in island working face is put forward, the fracture structure of basic roof is determined and the reasonable applicable type of gob-side roadway is selected. The results after pressure relief show that the average daily microseismic energy of ZF2822 working face after pressure relief is 0.87×10\u003csup\u003e4\u003c/sup\u003eJ, which is about 42.38 % lower than that of April. The average stress is 1.13 MPa lower than that of the mining before the pressure relief area, and the decrease is 22.42 %. During the mining process of the working face in the pressure relief area, the average stress is 0.49 MPa lower than that before the pressure relief area, and the decrease is 9.02 %. It shows that the pressure relief has played a very good effect and provides a reference for the same type of mine.\u003c/p\u003e","manuscriptTitle":"Study on overburden rock structure characteristics and surrounding rock control technology of island working face","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-06-14 04:51:37","doi":"10.21203/rs.3.rs-4503715/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2024-07-24T06:36:49+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2024-07-22T07:50:19+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2024-07-15T03:07:50+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"85196618365743357840653678488458796419","date":"2024-07-07T05:08:43+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"253854900104625054865885606598333087013","date":"2024-07-04T04:15:52+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2024-07-03T05:02:36+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2024-06-02T09:59:47+00:00","index":"","fulltext":""},{"type":"editorInvited","content":"","date":"2024-06-01T14:29:02+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2024-06-01T14:21:20+00:00","index":"","fulltext":""},{"type":"submitted","content":"Scientific Reports","date":"2024-05-30T14:29:19+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":"7aaf106c-d4e2-43d2-84dc-a04bb6920987","owner":[],"postedDate":"June 14th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[{"id":33038441,"name":"Physical sciences/Energy science and technology/Fossil fuels"},{"id":33038442,"name":"Physical sciences/Energy science and technology/Fossil fuels/Coal"}],"tags":[],"updatedAt":"2024-09-09T16:13:05+00:00","versionOfRecord":{"articleIdentity":"rs-4503715","link":"https://doi.org/10.1038/s41598-024-71373-8","journal":{"identity":"scientific-reports","isVorOnly":false,"title":"Scientific Reports"},"publishedOn":"2024-09-03 16:05:31","publishedOnDateReadable":"September 3rd, 2024"},"versionCreatedAt":"2024-06-14 04:51:37","video":"","vorDoi":"10.1038/s41598-024-71373-8","vorDoiUrl":"https://doi.org/10.1038/s41598-024-71373-8","workflowStages":[]},"version":"v1","identity":"rs-4503715","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4503715","identity":"rs-4503715","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}