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A. Koe

Bio: A. Koe is an academic researcher. The author has contributed to research in topics: Disturbance (geology). The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

Papers
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Proceedings ArticleDOI
01 Jan 2017
TL;DR: In this paper, the authors investigate the potential for seismic surveys to estimate the extent of damage caused during slope excavation and to estimate a disturbance factor, and show that a velocity contrast due weathering/disturbance effects in a cliff face is detectable with an active seismic survey with geophones attached to the face.
Abstract: Initial field trials to investigate the potential for seismic surveys to estimate the extent of damage caused during slope excavation and to estimate a disturbance factor show that a velocity contrast due weathering/disturbance effects in a cliff face is detectable with an active seismic survey with geophones attached to the face. Modelling results confirm the resolution of the method and the experimental set-up is being deployed to monitor excavated faces at Hinkley Point C construction site.

1 citations


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Journal ArticleDOI
TL;DR: In this paper, the capability of in situ acoustic emission (AE) monitoring in the context of structural health monitoring (SHM) in mines and in various geological settings is reported, and the results show that AE activity monitors rock deformation in geological boundaries due to convergence of the rock and high AE activity occurs in zones of dilatancy stress in homogenous rock.
Abstract: A major task in mines and even more in underground repositories for nuclear waste is to investigate crack formation for evaluation of rock mass integrity of the host rock Therefore, in situ acoustic emission (AE) monitoring are carried out in mines as part of geomechanical investigations regarding the stability of underground cavities and the integrity of the rock mass In this work, the capability of in situ AE monitoring in the context of structural health monitoring (SHM) in mines and in various geological settings will be reported SHM pointed out, that the AE network is able to monitoring AE activity in rock with a volume up to 10 6 cubicmeter and distances up to 200 m (eg, 100 m × 100 m × 100 m) in the frequency range of 1 kHz to 150 kHz Very small AE events with source size in approximately centimeter to millimeter scale are detected The results show that AE activity monitors rock deformation in geological boundaries due to convergence of the rock In addition, high AE activity occurs in zones of dilatancy stress in homogenous rock In conclusion in situ AE monitoring is a useful tool to observe instabilities in rock long before any damage becomes visible

48 citations