Počet záznamů: 1
Fracturing of migmatite monitored by acoustic emission and ultrasonic sounding
- 1.
SYSNO ASEP 0494576 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Fracturing of migmatite monitored by acoustic emission and ultrasonic sounding Tvůrce(i) Petružálek, Matěj (GLU-S) RID, SAI, ORCID
Lokajíček, Tomáš (GLU-S) RID, SAI, ORCID
Svitek, Tomáš (GLU-S) SAI, RID
Jechumtálová, Zuzana (GFU-E) ORCID, RID
Kolář, Petr (GFU-E) ORCID, RID
Šílený, Jan (GFU-E) ORCID, RIDZdroj.dok. Rock Mechanics and Rock Engineering. - : Springer - ISSN 0723-2632
Roč. 52, č. 1 (2019), s. 47-59Poč.str. 13 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. AT - Rakousko Klíč. slova fracturing ; anisotropy ; source mechanism ; acoustic emission ; ultrasonic sounding Vědní obor RIV DC - Seismologie, vulkanologie a struktura Země Obor OECD Volcanology Vědní obor RIV – spolupráce Geologický ústav - Geologie a mineralogie CEP GA16-03950S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora GLU-S - RVO:67985831 ; GFU-E - RVO:67985530 UT WOS 000456673000004 EID SCOPUS 85053439932 DOI 10.1007/s00603-018-1590-2 Anotace Here, we present an experimental study of the fracturing of anisotropic migmatite with plane-parallel structure (foliation). Four specimens, with different dips of foliation, including subhorizontal (13 degrees), subvertical (86 degrees), and oblique (47 degrees, 67 degrees), were uniaxially loaded up to failure. Acoustic emission monitoring and ultrasonic sounding were applied for fracturing characterization. In case of subhorizontal and subvertical foliation, the tensile source type played an important role before reaching nucleation stress when shearing became dominant. The dominance of non-tension microcracking was characteristic for oblique foliation. The uniaxial loading of migmatite resulted in triaxial stress state regardless of the foliation dip. The minimum stress axis was in the subhorizontal direction of the foliation dip. The triaxial stress state caused the preferential orientation of induced shear and tension microcracks that had the same azimuthal orientation as the foliation. Preferential microcracking resulted in preferential orientation of the failure plane. Based on the anisotropic behavior of migmatite's characteristic mechanical properties, as well as its mechanism of failure that is typical for anisotropic rocks, the obtained conclusions may be generalized for other types of metamorphic anisotropic rocks with a plane-parallel structure. Pracoviště Geofyzikální ústav Kontakt Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Rok sběru 2020 Elektronická adresa https://link.springer.com/article/10.1007%2Fs00603-018-1590-2
Počet záznamů: 1