When a gouge-filled rock discontinuity is subjected to dynamic perturbations, the intrinsic and extrinsic factors, such as gouge properties and loading environments, make its dynamic response extremely complex. Under various loading/unloading conditions, such as stress wave incidence and normal stress unloading, stress drop is a common phenomenon that can be observed with other features in experimental, numerical, and field works. When gouge contacts are approaching to a critical stress state for the shear failure, gouge damage and contact detachment occur accompanied by stress drop and energy relaxation. The stress drop associated with gouge degradation could be a reliable feature to make induced geological hazards interpretable and predictable. It also shows that the reduction of normal and shear stresses is a reasonable explanation of fault instability induced by nearby tunnel excavation.
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Dynamically induced gouge degradation and implications for fault instability
Paper presented at the ISRM 2nd International Conference on Rock Dynamics, Suzhou, China, May 2016.
Paper Number: ISRM-ROCDYN-2016-26
Published: May 18 2016
Wu, W. "Dynamically induced gouge degradation and implications for fault instability." Paper presented at the ISRM 2nd International Conference on Rock Dynamics, Suzhou, China, May 2016.
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