Examines structural damage in faulted Opalinus Clay, suggesting implications for underground excavation.
The PF/PF-A (Progressive Failure of Structurally Controlled Overbreaks) experiment examines how structurally controlled rock mass damage evolves and spreads in faulted Opalinus Clay shale excavations. The project includes an in-situ experiment, installed at the Main Fault of the Mont Terri rock laboratory (MTRL), (hydro)mechanical laboratory testing of fault rocks, with a focus on natural scaly-clay and tectonic fault planes, as well as discontinuum numerical modelling and simulations. In this paper, key observations are summarised and discussed.
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Ziegler et al. (2026) studied this question.
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