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Relation between crack geometrical parameters, fracture toughness and rock microstructure investigated using X-ray computed tomography

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    SYSNO ASEP0597605
    Document TypeC - Proceedings Paper (int. conf.)
    R&D Document TypeConference Paper
    TitleRelation between crack geometrical parameters, fracture toughness and rock microstructure investigated using X-ray computed tomography
    Author(s) Vavro, Leona (UGN-S) RID
    Vavro, Martin (UGN-S) RID, ORCID
    Souček, Kamil (UGN-S) RID, ORCID
    Řimnáčová, Daniela (USMH-B) ORCID, SAI
    Number of authors4
    Source TitleProceedings of the ISRM European Rock Mechanics Symposium EUROCK 2024, New Challenges in Rock Mechanics and Rock Engineering. - Alicante : CRC Press, 2024 / Tomás R. ; Cano M. ; Riquelme A. ; Pastor J. L. ; Benavente D. ; Ordónez S. - ISBN 978-103255144-9
    Pagess. 1409-1415
    Number of pages6 s.
    Publication formOnline - E
    ActionISRM European Rock Mechanics Symposium, EUROCK 2024
    Event date15.07.2024 - 19.07.2024
    VEvent locationAlicante
    CountryES - Spain
    Event typeWRD
    Languageeng - English
    CountryES - Spain
    Keywordscrack geometry ; fracture toughness ; rock microstructure ; rock porosity
    Subject RIVDH - Mining, incl. Coal Mining
    OECD categoryEnvironmental and geological engineering, geotechnics
    Subject RIV - cooperationInstitute of Rock Structure and Mechanics - Mining, incl. Coal Mining
    R&D ProjectsGA23-05128S GA ČR - Czech Science Foundation (CSF)
    Method of publishingLimited access
    Institutional supportUGN-S - RVO:68145535 ; USMH-B - RVO:67985891
    UT WOS001310272000216
    EID SCOPUS85200398321
    DOI https://doi.org/10.1201/9781003429234-216
    AnnotationIn this contribution, the initial results of the study of the influence of rock microstructure and composition on the fracture toughness (FT) of rocks measured by the chevron bend (CB) test and subsequent analysis of cracks geometry using X-ray computed tomography (XCT) are presented. A total of 10 different types of rocks, mostly sandstones, were used for this testing. On the basis of laboratory experiments, the following conclusions can be made: (1) the value of crack length generally increases with decreasing rock porosity, (2) the value of crack length generally increases with increasing value of fracture toughness, (3) the value of the crack length of sandstones increases with a growing degree rock matrix silicification, (4) in porous rocks like sandstones, the crack propagation goes preferably throughout the pore space, and (5) in low-porosity crystalline igneous and metamorphic rocks, the cracks spread along grain bound-
    aries and often also break mineral grains.
    WorkplaceInstitute of Geonics
    ContactLucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354
    Year of Publishing2025
Number of the records: 1  

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