Analysis of energy evolution and failure mechanism of cemented tailings backfill with voids

Analysis of energy evolution and failure mechanism of cemented tailings backfill with voids | 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 Analysis of energy evolution and failure mechanism of cemented tailings backfill with voids Sen Han, Peng Wen, Guangzhao Pei, Lipeng He, Chuanjin Pu, Dingjun Xiao, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7002080/v1 This work is licensed under a CC BY 4.0 License Status: Under Revision Version 1 posted 9 You are reading this latest preprint version Abstract To investigate the influence of pore defects on the mechanical properties and failure mechanisms of cemented tailings backfill(CTB), this study systematically analyzed the stress-strain response, energy evolution, and crack propagation characteristics of cemented tailings backfill with voids (CTBV) through uniaxial compression tests and particle flow numerical simulations. Single-pore Samples with varying pore diameters (D = 5, 6, and 8 mm) and double-pore Samples with different arrangement angles (0°, 45°, and 90°) and swapped primary and secondary pore positions were prepared. The experimental results demonstrated that the presence of pores significantly reduced the compressive strength of the backfill. Specifically, the peak strength of single-pore Samples exhibited a linear decrease with increasing pore diameter (reduction of 7.4%ཞ21.6%), and the elastic modulus decreased by 22.4%ཞ55.3%. Among the double-pore Samples, the 90° vertically aligned structure exhibited the optimal mechanical performance, with its strength approximately 15% higher than that of the single-pore 8 mm specimen, indicating that vertical alignment can delay the propagation of the main crack by optimizing the superposition effect of the inter-pore stress field. Based on the aforementioned changes in mechanical properties, energy analysis revealed that pores altered the energy storage-dissipation pattern. The peak absorbed energy of the double-pore Samples increased by 11.2% compared to the single-pore Samples, and the energy release in the post-peak stage was primarily dominated by dissipated energy. The numerical simulation results indicated that crack initiation originated from tensile stress concentration around the pores, propagating obliquely at a 45° angle. The damage evolution process conformed to the Weibull distribution, which is in agreement with the stress-strain curve characteristics observed in the experiments. The damage accumulation rate of the 90° aligned specimen was 30% slower than that of other double-pore structures. These findings provide a theoretical basis for the structural design of mine backfill and defect repair, particularly regarding the influence of pore geometry on energy dissipation and the potential for stress field optimization to enhance backfill stability. perforated filling body mechanical properties energy evolution failure characteristics damage evolution Full Text Additional Declarations No competing interests reported. Supplementary Files GraphicalAbstract.pdf Highlights.docx Cite Share Download PDF Status: Under Revision Version 1 posted Editorial decision: Revision requested 16 Feb, 2026 Reviews received at journal 05 Feb, 2026 Reviews received at journal 31 Jan, 2026 Reviewers agreed at journal 30 Jan, 2026 Reviewers agreed at journal 29 Jan, 2026 Reviewers invited by journal 12 Jan, 2026 Editor assigned by journal 13 Jul, 2025 Submission checks completed at journal 03 Jul, 2025 First submitted to journal 29 Jun, 2025 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. 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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-7002080","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":573237926,"identity":"c1e1bd91-bfdd-418e-8798-265e04731ae6","order_by":0,"name":"Sen Han","email":"","orcid":"","institution":"Southwest University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Sen","middleName":"","lastName":"Han","suffix":""},{"id":573237927,"identity":"a1d72543-2ff9-445f-a197-81db9c8bd469","order_by":1,"name":"Peng 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Single-pore Samples with varying pore diameters (D\u0026thinsp;=\u0026thinsp;5, 6, and 8 mm) and double-pore Samples with different arrangement angles (0\u0026deg;, 45\u0026deg;, and 90\u0026deg;) and swapped primary and secondary pore positions were prepared. The experimental results demonstrated that the presence of pores significantly reduced the compressive strength of the backfill. Specifically, the peak strength of single-pore Samples exhibited a linear decrease with increasing pore diameter (reduction of 7.4%ཞ21.6%), and the elastic modulus decreased by 22.4%ཞ55.3%. Among the double-pore Samples, the 90\u0026deg; vertically aligned structure exhibited the optimal mechanical performance, with its strength approximately 15% higher than that of the single-pore 8 mm specimen, indicating that vertical alignment can delay the propagation of the main crack by optimizing the superposition effect of the inter-pore stress field. Based on the aforementioned changes in mechanical properties, energy analysis revealed that pores altered the energy storage-dissipation pattern. The peak absorbed energy of the double-pore Samples increased by 11.2% compared to the single-pore Samples, and the energy release in the post-peak stage was primarily dominated by dissipated energy. The numerical simulation results indicated that crack initiation originated from tensile stress concentration around the pores, propagating obliquely at a 45\u0026deg; angle. The damage evolution process conformed to the Weibull distribution, which is in agreement with the stress-strain curve characteristics observed in the experiments. The damage accumulation rate of the 90\u0026deg; aligned specimen was 30% slower than that of other double-pore structures. 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