Livrables
This data set includes the data that was collected during a trial field deployment of the tool developed in this project. This data is collected at the Tressange Iron Mine in France. This site consists of a layer of argillaceous claystone rocks that is the target horizon for the experiment.
This provides a unique data set of ultrasonic measurements collected in situ. The data set also provides a validation of the OMNIBUS technology and the use of AE and ultrasonic methods in argillaceous rock-types. The data and results provide a data set for understanding the behaviour of argillaceous rock and its response to variations in the ambient stress field. Undertaking these experiments provides the partners with technical expertise and know-how that can be exploited for future consulting services.
The result includes a unique data-set from laboratory tests (both uni-axial and tri-axial) carried out on argillaceous rock samples from the Bure en Meuse site, the potential future repository site under investigation by ANDRA. The tests involved the collection of ultrasonic data (both velocity and acoustic emission measurements) as well as standard rock mechanics rock response parameters.
The data set provides an improved understanding of the behaviour of these argillaceous rock types under different stress histories, particularly in terms of their ultrasonic response. This is of importance for the interpretation of data collected during in situ tests using, for example, the tools developed in the OMNIBUS project. In addition the experience and expertise gained from having designed the protocol for these tests and subsequently conducting them will provide the partner conducting these tests with the opportunity to exploit them in terms of future consultancy services.
The numerical modelling studies undertaken in OMNIBUS provide a unique data-set giving insight into the effects of the physical properties of a rock-mass on the passage of ultrasonic waves. A total of 667 models have been run using the Wave3D finite difference code, and the results are currently being analysed. The results include investigations of parameters such as crack density, crack size, crack orientation and fluid content and consider both P and S wave propagation. The modelling gives detailed quantitative information on variations in the phase and amplitude spectra compared to waves passed through a perfectly elastic body.
These results will provide new knowledge on the interpretation of ultrasonic data through rocks with different properties. The interpretation could be extended to other materials such as concrete and metals. The results will also have applications to understanding the transmission of acoustic waves at lower, seismic frequencies. The results thus have applications to a wide range of engineering scenarios in the radioactive waste, civil engineering, mining and petroleum sectors.
The algorithms and knowledge gained from these results will provide the opportunity for exploitation in the form of consultancy services to the project partners.
Recherche de données OpenAIRE...
Une erreur s’est produite lors de la recherche de données OpenAIRE
Aucun résultat disponible