Publication Abstract

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Title Using scaled seismic studies to validate 3D numerical models of the rock barrier around a deep repository

Authors W.S. Pettitt, J.R. Haycox and R.P. Young

Publication Reference 2006,Proceedings of the European Regional ISRM Symposium, Eurock06. Liege, Belgium

Abstract Microseismic, acoustic emission (AE) and ultrasonic technologies are scaled seismic investigations that provide remote methods of examining the disturbance and damage evolution induced in a rock mass experiencing changes in operating conditions. The technologies allow the volumes of disturbance and damage to be delineated and quantified, and provide measured data for the validation of numerical models that predict the effects of the environmental conditions on the rock mass, including mechanical, thermal and hydraulic stresses, and chemical and biological processes. An example environment is a high-level radioactive waste repository. In this paper we show example results from the Prototype Repository Test at SKB’s Äspö Hard Rock Laboratory (HRL), Sweden. We relate the results to the operating conditions experienced during the initial phases of the test and to full-scale modelling simulations performed in the AC/DC software, a new modelling code developed during the SAFETI project, co-funded by the European Commission as part of the fifth EURATOM Framework Program.

Key Figure Key Figure
A comparison of modelled microcrack data (a,b) and the measured AE data (c) for the PRT deposition hole. All views are in plan and relative to the indicated maximum principal stress orientation.

Link http://www.eurock06.ulg.ac.be/Abstracts/index.htm



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