Laboratory acoustic emissions reveal stress rotation from preparation processes toward fault slip on varying surface roughness in granular materials
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F25%3A00617125" target="_blank" >RIV/67985530:_____/25:00617125 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0364188" target="_blank" >https://hdl.handle.net/11104/0364188</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2024GL113093" target="_blank" >10.1029/2024GL113093</a>
Alternative languages
Result language
angličtina
Original language name
Laboratory acoustic emissions reveal stress rotation from preparation processes toward fault slip on varying surface roughness in granular materials
Original language description
We investigate the influence of fault roughness on physical damage prior to large laboratory rock failure and the evolution of the local stress field surrounding the fault zone as macroscopic shear slip approaches. To achieve this, we analyze acoustic emission (AE) data from displacement-driven rock friction experiments conducted on porous sandstone samples containing either a saw-cut (smooth) or a rough fault. Using high-quality AE-derived focal mechanisms and two stress tensor inversion approaches-one considering double-couple (DC) components and the other one incorporating non-DC components, we examine the temporal evolution of the local stress tensor for both smooth and rough faults. Our results show no significant differences between the two stress inversion methods, indicating that non-DC components have no significant influence on the resulting stress tensors in our experiments. As macroscopic shear slip approaches, the principal stress axes surrounding the fault zone gradually rotate, regardless of the initial fault roughness. The observed evolution of stress tensors correlates with the evolving partitioning between volumetric and shear deformation, as derived from moment tensor inversion of AEs. Compared to the smooth fault, the rough fault exhibits higher local stress heterogeneity and more erratic fluctuations in AE source-related parameters as loading progresses.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10507 - Volcanology
Result continuities
Project
<a href="/en/project/GA22-10747S" target="_blank" >GA22-10747S: Inversion of focal mechanisms and seismic moment tensors for stress and its spatiotemporal variation</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Geophysical Research Letters
ISSN
0094-8276
e-ISSN
1944-8007
Volume of the periodical
52
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
e2024GL113093
UT code for WoS article
001412492400001
EID of the result in the Scopus database
2-s2.0-85216921642