In situ estimation of effective rock elastic moduli by seismic ambient vibrations

0574665 - GFÚ 2024 RIV GB eng J - Článek v odborném periodiku
Müller, J. - Burjánek, Jan
In situ estimation of effective rock elastic moduli by seismic ambient vibrations.
International Journal of Rock Mechanics and Mining Sciences. Roč. 170, October (2023), č. článku 105459. ISSN 1365-1609. E-ISSN 1873-4545
Grant CEP: GA ČR(CZ) GA20-15818S
Institucionální podpora: RVO:67985530
Klíčová slova: Bohemian Paradise * rock tower * seismic ambient noise * seismic surface waves * elastic moduli
Obor OECD: Volcanology
Impakt faktor: 7.2, rok: 2022
Způsob publikování: Open access
https://www.sciencedirect.com/science/article/pii/S1365160923001338

In this study, we performed a non-invasive ambient noise investigation of unsaturated rock structures in the Bohemian Paradise (Bohemian Cretaceous Basin, Czech Republic). Our study focused on two key topics: 1) An in situ elastic moduli estimate of competent, horizontally deposited sandstone layers using ambient noise array measurements. Recordings were processed using an f-k array analysis, from which frequency-dependent Love and Rayleigh wave dispersion curves, as well as Rayleigh wave ellipticity, were retrieved. Data were inverted for the P- and S-wave velocity profiles, from which Young's and shear moduli were successfully estimated. 2) A study of the local response of the Kapelnik rock tower. We analysed a dataset of ambient noise recordings obtained from the top of the tower and its foot. Information regarding tower oscillation frequencies and directions, together with amplification ratios, were retrieved from a particle motion polarisation analysis and from site-toreference spectral ratios. Euler-Bernoulli beam theory was also employed for interpreting measured data using elastic moduli estimated from noise array measurements.
Trvalý link: https://hdl.handle.net/11104/0344787