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dc.contributor.authorCao, Shuai
dc.contributor.authorXue, Gaili
dc.contributor.authorYılmaz, Erol
dc.contributor.authorYin, Zhenyu
dc.contributor.authorYang, Fudou
dc.date.accessioned2020-12-19T20:22:46Z
dc.date.available2020-12-19T20:22:46Z
dc.date.issued2021
dc.identifier.citationCao, S., Xue, G., Yılmaz, E., Yin, Z., & Yang, F., (2021). Utilizing concrete pillars as an environmental mining practice in underground mines. Journal of Cleaner Production, 278, 123433. https://doi.org/10.1016/j.jclepro.2020.123433en_US
dc.identifier.issn0959-6526
dc.identifier.urihttps://doi.org/10.1016/j.jclepro.2020.123433
dc.identifier.urihttps://hdl.handle.net/11436/4539
dc.description.abstractGround control is an integral element of mine design and worker safety. The use of concrete pillars for underground mines is of paramount importance to maintaining the economic and operational security of structures. This paper deals with the use of fiber-reinforced concrete (FRC) as pillars via laboratory and field tests. The strength performance of prepared concrete reinforced with glass, polypropylene and polyacrylonitrile fibers was researched by a mechanical press and a computed tomography (CT) tool. Samples were tested for fiber volume fractions of 0, 0.4, 0.8 and 1.2 wt%, respectively. Results have indicated that, with the addition of fibers, the strength was improved first due to a bridging effect and then decreased due to a pull-out effect. Compared to the reference sample, the absorbed energy prevents FRC from deterioration by mechanisms of matrix cracking, fiber-matrix interface debonding and fiber rupture. The peak strains of FRC linearly rise with increasing fiber. The gray value distribution curves have also good correspondence with 2D CT pore and crack distributions, which reveal that gray value processing could depict the structural behavior of concretes reinforced with or without fiber. Theoretical analyses show that the pillar remains stable for sustainable mining. Besides, the location and size of FRC pillars are suitable for numerical calculations of the trial stope. The findings of this study can offer a key reference for the orebody pillar recovery in underground mines. © 2020 Elsevier Ltden_US
dc.description.sponsorshipLNM202009 National Natural Science Foundation of China: 51974012, 51804017 Fundamental Research Funds for the Central Universitiesen_US
dc.description.sponsorshipThis work was financially supported by the National Natural Science Foundation of China (grant numbers: 51804017 and 51974012 ), the Open Fund of State Key Laboratory of Nonlinear Mechanics (grant number: LNM202009 ) and Fundamental Research Funds for the Central Universities (Grant No. FRF-TP-20-001A2 and FRF-BD-19-005A ).en_US
dc.language.isoengen_US
dc.publisherElsevier Ltden_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCompressive strengthen_US
dc.subjectComputed tomographyen_US
dc.subjectEnvironmental mining practiceen_US
dc.subjectFiber reinforced concreteen_US
dc.subjectNumerical simulationen_US
dc.subjectOre pillar recoveryen_US
dc.titleUtilizing concrete pillars as an environmental mining practice in underground minesen_US
dc.typearticleen_US
dc.contributor.departmentRTEÜen_US
dc.contributor.institutionauthorYılmaz, Erol
dc.identifier.doi10.1016/j.jclepro.2020.123433
dc.identifier.volume278en_US
dc.relation.journalJournal of Cleaner Productionen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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