Experimental study on void evolution and slurry diffusion mechanism of fractured rock body in collapsed zone

Experimental study on void evolution and slurry diffusion mechanism of fractured rock body in collapsed zone | 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 Experimental study on void evolution and slurry diffusion mechanism of fractured rock body in collapsed zone ping liu, zhenglong li, Wei liang, Yueqin Qiu, Sen Han, Linhai Wen This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8046926/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 In order to reveal the compaction and deformation mechanism of the crushed rock body in the collapse zone of the hollow area and the rule of slurry diffusion, the rock body in the collapse zone of the 10806 integrated mining face was taken as the object of the study, and indoor physical simulation and ANSYS Fluent numerical simulation were combined to carry out the study. Firstly, a multi-axial loading platform was used to carry out the compaction test of the broken rock body, and the rock body was graded according to the grain sizes of 0–2, 2–4, 4–6, 6–8 and 8-10cm to analyze the compression deformation and void evolution characteristics; then a visual grouting system was used to study the flow pattern of the slurry; finally, models with different porosities (0.4, 0.6) were constructed to investigate the effect of grouting pressure (10 kPa-1 MPa) on the diffusion of the slurry. Finally, different porosity (0.4, 0.6) models were constructed to investigate the effect of grouting pressure (10kPa ~ 1MPa) on slurry diffusion. The results show that: the compression of fractured rock body is divided into two stages: rapid (74%-85.7% of total deformation) and slowing down, and the rapid compression stage is the optimal time for filling; the smaller the porosity is, the slower the flow rate of the slurry, and the lower the filling efficiency is; the positive correlation between grouting pressure and slurry diffusion area and flow rate, and the best filling effect is achieved when 1MPa is used, and the compacted area needs higher pressure and encrypted grouting holes. The study can provide theoretical basis for the optimization of filling parameters in the collapse zone of the hollow zone. coal gangue disposal cavingzone slurryfilling diffusionlaw fractured rock mass void ratio 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-8046926","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":556471775,"identity":"ea958cd1-4e07-43f2-88d6-1f6976c371f7","order_by":0,"name":"ping liu","email":"","orcid":"","institution":"Guizhou University","correspondingAuthor":false,"prefix":"","firstName":"ping","middleName":"","lastName":"liu","suffix":""},{"id":556471776,"identity":"ceca4911-6e86-44a0-b70e-00e1a04d7470","order_by":1,"name":"zhenglong 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The results show that: the compression of fractured rock body is divided into two stages: rapid (74%-85.7% of total deformation) and slowing down, and the rapid compression stage is the optimal time for filling; the smaller the porosity is, the slower the flow rate of the slurry, and the lower the filling efficiency is; the positive correlation between grouting pressure and slurry diffusion area and flow rate, and the best filling effect is achieved when 1MPa is used, and the compacted area needs higher pressure and encrypted grouting holes. 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