Bi-modular properties of sandstone inferred from seismic moment tensors of acoustic emissions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F23%3A00578344" target="_blank" >RIV/67985831:_____/23:00578344 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985530:_____/23:00583408

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1365160923002502?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1365160923002502?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijrmms.2023.105576" target="_blank" >10.1016/j.ijrmms.2023.105576</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bi-modular properties of sandstone inferred from seismic moment tensors of acoustic emissions

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Bi-modular properties of sandstone inferred from seismic moment tensors of acoustic emissions

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20701 - Environmental and geological engineering, geotechnics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Rock Mechanics and Mining Sciences

ISSN

1365-1609

e-ISSN

1873-4545

Svazek periodika

171

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

105576

Kód UT WoS článku

001199173600001

EID výsledku v databázi Scopus

2-s2.0-85171179623