Effect of anisotropy on fracture toughness and fracturing of rocks

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dc.contributor.authorGhamgosar, Morteza
dc.contributor.authorWilliams, David J.
dc.contributor.authorErarslan, Nazife
dc.date.accessioned2025-01-06T17:29:50Z
dc.date.available2025-01-06T17:29:50Z
dc.date.issued2015
dc.description49th US Rock Mechanics / Geomechanics Symposium -- 29 June 2015 through 1 July 2015 -- San Francisco -- 119212
dc.description.abstractElastic parameters of rocks are typically used for design purposes in open pit and underground mining, underground spaces and rock-cutting projects. However, the ultimate strength of rocks is strongly influenced by their micro-fractures, preexisting cracks, and anisotropy due to inhomogeneity, discontinuities, and differing particle sizes or shapes and orientations. Since the fracture behaviour of rocks is important to geotechnical engineers concerned with the design of excavations and underground spaces, it is obvious that laboratory investigations of their anisotropic parameters are necessary for safe designs. The main objective of this paper is to investigate the effect of different orientations of the anisotropy of Brisbane sandstone specimens subjected to diametral compressive (indirect tensile) loading that influences their fracture toughness. To obtain the fracture toughness values of anisotropic Brisbane sandstone, Cracked Chevron Notch Brazilian Disc (CCNBD) specimens were prepared and tested according to International Society for Rock Mechanics (ISRM) standards. The fracture toughness of Brisbane sandstone was found to increase with increasing angle of anisotropy. Based on the experimental results, a statistical regression analysis was conducted to obtain the optimum orientation angle to obtain the highest strength under indirect tensile loading. Statistical analysis showed anisotropy orientations of 45° gave the highest fracture toughness value. Copyright 2015 ARMA, American Rock Mechanics Associa.
dc.description.sponsorshipMechanical & Mining Engineering at The University of Queensland; Newcrest Mining; University of Queensland, UQ
dc.identifier.endpage2670
dc.identifier.isbn978-151081051-8
dc.identifier.scopus2-s2.0-84964810356
dc.identifier.startpage2665
dc.identifier.urihttps://hdl.handle.net/20.500.14669/1376
dc.identifier.volume4
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAmerican Rock Mechanics Association (ARMA)
dc.relation.ispartof49th US Rock Mechanics / Geomechanics Symposium 2015
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectAnisotropy
dc.subjectCracks
dc.subjectFracture mechanics
dc.subjectMechanics
dc.subjectOpen pit mining
dc.subjectRegression analysis
dc.subjectRock mechanics
dc.subjectRocks
dc.subjectSandstone
dc.subjectAnisotropy orientation
dc.subjectElastic parameters
dc.subjectFracture behaviour
dc.subjectFracture toughness values
dc.subjectInternational society
dc.subjectLaboratory investigations
dc.subjectStatistical regression analysis
dc.subjectUnderground mining
dc.subjectFracture toughness
dc.titleEffect of anisotropy on fracture toughness and fracturing of rocks
dc.typeConference Object

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