Mine operating accurate stability control with optical fiber sensing and Bragg grating technology: the European BRITE/EURAM STABILOS project

Ferdinand, Pierre; Ferragu, O.; Lechien, J. L.; Lescop, Benoît; Magne, Sylvain; Marty, V.; Rougeault, S.; Kotrotsios, G.; Neuman, V.; Depeursinge, Y.; Michel, Julia; Uffelen, Marco Van; Varelas, D.; Berthou, H.; Pierre, Guillaume; Renouf, C.; Jarret, Bertrand; Verbandt, Yves; Stevens, W. T.; Voet, Marc R. H.; Toscano, D.

doi:10.1109/50.400683

Cited by 30 publications

(9 citation statements)

References 11 publications

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“…In the last decades, various monitoring instruments had been developed for tunnelling, such as laser displacement sensors (LDS), linear variable differential transformer (LVDT), dial gauges, and vision based systems [4][5][6]. Conventional monitoring sensors, mostly based on resistance type, inductance type, and vibrating wire type [7], are either unsuitable for remote real-time monitoring or too bulky or sophisticated for mass application in the structural health monitoring (SHM) of tunnel structures [8][9][10]. FBG sensors have commenced in safety assessment of geotechnical structures, which features small size, light weight, nonconductivity, fast response, resistance to corrosion, higher temperature capability, and immunity to electromagnetic noise and radio frequency interference [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Fiber Bragg Grating Sensors-Based In Situ Monitoring and Safety Assessment of Loess Tunnel

et al. 2016

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Compared with electrical strain gauges, fiber Bragg grating (FBG) sensing technology is a relatively novel method for tunnel structural health monitoring, which has a number of advantages including high accuracy, multiplexing, electromagnetic interference resistance, and good repeatability. In order to study the internal force of the tunnel liner and detect the potential safety hazards, series of strain monitoring tests of a loess tunnel, taking into account the complex stress and strain variation of the loess during tunnelling, were performed by employing the tandem linear FBG sensor arrays controlled by the wavelength division multiplexing (WDM) technology. The concrete strain has obvious linear characteristics over time in the early stage and then gradually tends to a stable value. Moreover, after the necessary temperature compensation, loess tunnel structure safety was assessed through the analysis of real-time strain and internal force of the liner concrete, and the FBG monitoring data and safety assessment results indicate that the safety factors of various liner sections all meet the code requirements, which verify the safety and stability of the tunnel liner structure. The FBG sensors-based in situ monitoring technology can be well applied in the loess tunnel structure safety assessment.

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Section: Introductionmentioning

confidence: 99%

Fiber Bragg Grating Sensors-Based In Situ Monitoring and Safety Assessment of Loess Tunnel

et al. 2016

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“…These data can then be analyzed using existing earthquake prediction methods for predicting any potential induced earthquakes in the vicinity. Integrated DAS and DTS systems can also be deployed in underground mines to monitor the local environment, stress-induced rock shifts, and micro-seismic events to ensure mine safety and operations [ 59 ].…”

Section: Dvts Systems In Geophysical Applicationsmentioning

confidence: 99%

A Review of Hybrid Fiber-Optic Distributed Simultaneous Vibration and Temperature Sensing Technology and Its Geophysical Applications

Miah

Potter

2017

Sensors

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Distributed sensing systems can transform an optical fiber cable into an array of sensors, allowing users to detect and monitor multiple physical parameters such as temperature, vibration and strain with fine spatial and temporal resolution over a long distance. Fiber-optic distributed acoustic sensing (DAS) and distributed temperature sensing (DTS) systems have been developed for various applications with varied spatial resolution, and spectral and sensing range. Rayleigh scattering-based phase optical time domain reflectometry (OTDR) for vibration and Raman/Brillouin scattering-based OTDR for temperature and strain measurements have been developed over the past two decades. The key challenge has been to find a methodology that would enable the physical parameters to be determined at any point along the sensing fiber with high sensitivity and spatial resolution, yet within acceptable frequency range for dynamic vibration, and temperature detection. There are many applications, especially in geophysical and mining engineering where simultaneous measurements of vibration and temperature are essential. In this article, recent developments of different hybrid systems for simultaneous vibration, temperature and strain measurements are analyzed based on their operation principles and performance. Then, challenges and limitations of the systems are highlighted for geophysical applications.

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“…A focal point of interest in underground construction and mining is the application of fiber Bragg grating (FBG) sensors [1]. Static measurement of rock deformations is a major concern in these environments, since underground excavations and blasting works generally create changes in the stress regime of the surrounding strata.…”

Section: Thitroductionmentioning

confidence: 99%

<title>Bragg grating seismic monitoring system</title>

Schmidt‐Hattenberger

Borm

Amberg³

1999

SPIE Proceedings

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A theoretical concept and its experimental realization of a fiber-optic Bragg grating strain sensor system to measure dynamic deformations in rock masses are presented. The system has been designed in order to monitor strain variations in the range of iO9 within a bandwidth of 0.1 to 2 kHz. First promising results from field experiments are shown where seismic signals have been detected, in comparison with conventional geophone registrations.

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Mine operating accurate stability control with optical fiber sensing and Bragg grating technology: the European BRITE/EURAM STABILOS project

Cited by 30 publications

References 11 publications

Fiber Bragg Grating Sensors-Based In Situ Monitoring and Safety Assessment of Loess Tunnel

Fiber Bragg Grating Sensors-Based In Situ Monitoring and Safety Assessment of Loess Tunnel

A Review of Hybrid Fiber-Optic Distributed Simultaneous Vibration and Temperature Sensing Technology and Its Geophysical Applications

<title>Bragg grating seismic monitoring system</title>

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