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Appl. Sci. 2018, 8(9), 1595; https://doi.org/10.3390/app8091595

Review on In Situ Acoustic Emission Monitoring in the Context of Structural Health Monitoring in Mines

1
Department of Mechanical and Energy Engineering, THM University of Applied Sciences, D-35390 Gießen, Germany
2
GMuG mbH (Gesellschaft für Materialprüfung und Geophysik mbH), D-61231 Bad Nauheim, Germany
*
Author to whom correspondence should be addressed.
Received: 31 July 2018 / Revised: 23 August 2018 / Accepted: 24 August 2018 / Published: 9 September 2018
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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 (e.g., 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. View Full-Text
Keywords: in situ acoustic emission (AE) monitoring; structural health monitoring; mines; host rock in situ acoustic emission (AE) monitoring; structural health monitoring; mines; host rock
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Manthei, G.; Plenkers, K. Review on In Situ Acoustic Emission Monitoring in the Context of Structural Health Monitoring in Mines. Appl. Sci. 2018, 8, 1595.

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