Attenuation of elastic wave across single fracture with finite shear strength

X. B. Zhao, J. Zhao, J. G. Cai, Y. X. Zhou

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther


When a wave propagates the wave is greatly attenuated due to the presence of fractures. This paper presents a study on S-wave attenuation across single fracture with the Coulomb slip behaviour. In the theoretical formulation, the method of characteristics combined with the Coulomb slip model is used to develop a set of recurrence equations with respect to particle velocities and shear stress. These equations are then numerically solved. To compare with the theoretical study, numerical modelling using Universal Distinct Element Code (UDEC) is conducted. A general agreement between UDEC modelling and theoretical analyses is achieved. The magnitude of transmission coefficient is calculated as a function of shear stress ratio and normalized shear stiffness. The study shows that the shear stress ratio is the important factor influencing wave transmission. The influence of normalized shear stiffness becomes obvious, when shear stress ratio is small.

Original languageEnglish
Title of host publicationImpact of Human Activity on the Geological Environment - Proceedings of the International Symposium of the International Society for Rock Mechanics, Eurock 2005
Number of pages7
Publication statusPublished - 1 Dec 2005
Externally publishedYes
EventEuropean Rock Mechanics Symposium 2005 - Brno, Czechia
Duration: 18 May 200520 May 2005 (Proceedings)


ConferenceEuropean Rock Mechanics Symposium 2005
Abbreviated titleEUROCK 2005
Internet address

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