Hydromechanical response to a mine by test experiment in a deep claystone

Abstract : In order to demonstrate the feasibility of radioactive waste repository in deep geological formation, an underground research laboratory is being constructed by Andra (French national radioactive waste management agency) in eastern France, in a Callovo-Oxfordian claystone. 15 boreholes were drilled from a drift at -447 m to install sensors around the shaft (6 m diameter) at depth -460 m to -474 m in order to record the hydromechanical behaviour of the claystone during a shaft sinking (drill and blast method). This paper is devoted to the analysis of the mechanical and hydromechanical behaviour observed during the shaft sinking. Analytical approach used herein allows to realistically evaluate the undrained response of the shaft neighboring with agreement with the in situ measurements. For the transient phase, prediction is qualitatively in accordance with measurement. In addition, deformation and displacement measurements are successfully compared to a simple 3D elastic calculation performed with the real face advancing. This emphasizes the quality of the data set which would be compared in the Modex-Rep European project with complex numerical modelling (poro-elasto-plasic-damage models, creep behaviour,...).
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  • HAL Id : ineris-00973241, version 1
  • INERIS : EN-2006-258

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Gilles Armand, Mountaka Souley, Kun Su, Vincent Renaud, Yannick Wileveau. Hydromechanical response to a mine by test experiment in a deep claystone. Conference "Geotechnique sea to sky 2006", Oct 2006, Vancouver, Canada. pp.488-495. ⟨ineris-00973241⟩

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