Accurate moment tensor inversion of acoustic emissions and its application to Brazilian splitting test

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F21%3A00542815" target="_blank" >RIV/67985530:_____/21:00542815 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1365160921000939" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1365160921000939</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijrmms.2021.104707" target="_blank" >10.1016/j.ijrmms.2021.104707</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Accurate moment tensor inversion of acoustic emissions and its application to Brazilian splitting test

Popis výsledku v původním jazyce

The efficiency of three inversions for accurate moment tensors: (1) the standard least-squares inversion, (2) the weighted least-squares inversion, and (3) the shear-tensile-compressive (STC) source inversion, is tested on acoustic emissions (AEs) produced during the Brazilian splitting test. A comparison of plots of the P/T axes of the focal mechanisms reveals that the double-couple part of the moment tensors is well constrained for all three inversions. By contrast, diamond source-type plots show that the non-double-couple components of the retrieved moment tensors are more sensitive to errors due to neglecting inhomogeneities and anisotropy in the rock sample, near-field terms and other wave phenomena effects. The weighted inversion and the STC inversion work better than the standard least-squares method and yield less scattered results. If moment tensors of AEs contain significant non-double-couple components of moment tensors produced by non-shear fracturing, the STC inversion proved to be most accurate. The retrieved moment tensors are well consistent with the expected fracture mechanism of AEs in the Brazilian splitting specimen and provide a further guidance for studying rock fracture processes.

Název v anglickém jazyce

Accurate moment tensor inversion of acoustic emissions and its application to Brazilian splitting test

Popis výsledku anglicky

The efficiency of three inversions for accurate moment tensors: (1) the standard least-squares inversion, (2) the weighted least-squares inversion, and (3) the shear-tensile-compressive (STC) source inversion, is tested on acoustic emissions (AEs) produced during the Brazilian splitting test. A comparison of plots of the P/T axes of the focal mechanisms reveals that the double-couple part of the moment tensors is well constrained for all three inversions. By contrast, diamond source-type plots show that the non-double-couple components of the retrieved moment tensors are more sensitive to errors due to neglecting inhomogeneities and anisotropy in the rock sample, near-field terms and other wave phenomena effects. The weighted inversion and the STC inversion work better than the standard least-squares method and yield less scattered results. If moment tensors of AEs contain significant non-double-couple components of moment tensors produced by non-shear fracturing, the STC inversion proved to be most accurate. The retrieved moment tensors are well consistent with the expected fracture mechanism of AEs in the Brazilian splitting specimen and provide a further guidance for studying rock fracture processes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10507 - Volcanology

Projekt

<a href="/cs/project/GA19-06422S" target="_blank" >GA19-06422S: Sdružená inverze seismických momentových tenzorů a Greenových funkcí</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

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

141

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

104707

Kód UT WoS článku

000643671300002

EID výsledku v databázi Scopus

2-s2.0-85103308585