Abstract
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 language | English |
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| Title of host publication | Impact of Human Activity on the Geological Environment - Proceedings of the International Symposium of the International Society for Rock Mechanics, Eurock 2005 |
| Pages | 723-729 |
| Number of pages | 7 |
| Publication status | Published - 1 Dec 2005 |
| Externally published | Yes |
| Event | European Rock Mechanics Symposium 2005 - Brno, Czechia Duration: 18 May 2005 → 20 May 2005 https://www.onepetro.org/conferences/ISRM/EUROCK05 (Proceedings) |
Conference
| Conference | European Rock Mechanics Symposium 2005 |
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| Abbreviated title | EUROCK 2005 |
| Country/Territory | Czechia |
| City | Brno |
| Period | 18/05/05 → 20/05/05 |
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