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Bi-modular properties of sandstone inferred from seismic moment tensors of acoustic emissions
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SYSNO ASEP 0583408 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Bi-modular properties of sandstone inferred from seismic moment tensors of acoustic emissions Tvůrce(i) Vavryčuk, Václav (GFU-E) ORCID, RID
Petružálek, M. (CZ)
Lokajíček, T. (CZ)
Aminzadeh, A. (CZ)Číslo článku 105576 Zdroj.dok. International Journal of Rock Mechanics and Mining Sciences. - : Elsevier - ISSN 1365-1609
Roč. 171, November (2023)Poč.str. 8 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova acoustic emissions ; tensile cracks ; rock ; auxetic behaviour ; fracturing ; rock bi-modularity Obor OECD Volcanology CEP GA22-10747S GA ČR - Grantová agentura ČR GA22-00580S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora GFU-E - RVO:67985530 UT WOS 001199173600001 EID SCOPUS 85171179623 DOI 10.1016/j.ijrmms.2023.105576 Anotace We propose a novel method for studying the λ/μ ratio, the vP/vS ratio and Poisson’s ratio of rocks based on the determination of highly accurate moment tensors of acoustic emissions (AEs). The validity of the method is verified on observations of 539 AEs recorded in a sandstone sample during a semi-circular bend test. We show that the sandstone exhibits the so-called bi-modular behaviour indicating that rock parameters significantly differ under compressive and tensile stress regimes. In addition, the zone characterized by highly tensile fractures is auxetic. For increasing shear component in AEs, Poisson’s ratio increases and the auxetic effects disappear. The proposed approach for determining the λ/μ, vP/vS, and Poisson’s ratios using AEs is fully independent of standard techniques based on measuring deformation of rock samples. The approach might find applications in detailed studies of rock behaviour under various stress conditions, in particular, in assessing the bi-modularity of rocks measured during a single experiment. Pracoviště Geofyzikální ústav Kontakt Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Rok sběru 2024 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S1365160923002502
Počet záznamů: 1