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Ultrasonic constraint of the microfracture anisotropy of flysch rocks from the Podhale Synclinorium (Poland)

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dc.abstract.enThis paper attempts to show the relationship between joints observed in flysch formations in the field and microfracture fabrics invisible to the naked eye in hand specimens. Ultrasonic measurements demonstrate that the intensity and orientations of domains “memorised” by rock specimens are associated with the historical stresses within the rock mass rather than the rock lamination. The spatial orientations of these microfractures have been measured, and their dynamic-elastic properties have been found to correlate with the orientation of macroscopic joint sets measured in the field. The elastic properties measured vary because of sedimentary diagenetic processes that occured during the tectonic deformations of these flysch rocks in the Podhale Synclinorium of Poland. The structural discontinuities detected by ultrasonic measurements can be perceived as an incipient phase of the macroscopic joints already visible in the field and are attributed to the in situ residual tectonic stresses. Such historical stresses impart a hidden mechanical anisotropy to the entire flysch sequence. The microfractures will develop into macroscopic joints during future relaxation of the exposed rock mass. Understanding the nature and orientation of the invisible microfracture anisotropy that will become macroscopic in the future is vital for the safe and efficient engineering of any rock mass.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKłopotowska, Agnieszka
dc.date.accessioned2024-01-26T11:18:21Z
dc.date.available2024-01-26T11:18:21Z
dc.date.copyright2018-01-05
dc.date.issued2018
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number107
dc.description.versionFINAL_PUBLISHED
dc.description.volume6
dc.identifier.doi10.1007/S00531-017-1579-1
dc.identifier.issn1437-3254
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/124105
dc.identifier.weblinkhttps://doi.org/10.1007/s00531-017-1579-1
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofInternational Journal of Earth Sciences
dc.relation.pages1941-1953
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.enJoints
dc.subject.enMicrofractures
dc.subject.enFlysch rocks
dc.subject.enUltrasonic waves
dc.subject.enDynamic elastic properties
dc.titleUltrasonic constraint of the microfracture anisotropy of flysch rocks from the Podhale Synclinorium (Poland)
dc.typeJournalArticle
dspace.entity.typePublication