Application of a distributed fibre optic strain sensing system to monitoring changes in the state of an underground mine

Naruse, Hiroshi; Uehara, Hideki; Deguchi, Taishi; Fujihashi, Kazuhiko; Onishi, Masatoshi; Espinoza, Raúl; Guzman, Cesar; Pardo, Cesar; Ortega, Cesar; Pinto, Manuel

doi:10.1088/0957-0233/18/10/s23

Cited by 65 publications

(30 citation statements)

References 11 publications

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“…For example, the electrolevels are mounted on a ring of interconnected beams in a London underground tunnel that requires deformation monitoring during construction (Bassett et al 1999). The BOTDR (Brillouin optical time domain reflectometer)-based distributed fibre optic strain sensing system is used to detect the deformation in a tunnel in the underground mine ventilation level (Naruse et al 2007). The microelectromechanical system (MEMS) strain sensors are used to realize a novel type of crackmeter for health monitoring of ageing civil infrastructures (Ferri et al 2010).…”

Section: Underground Structural Deformation Monitoring Techniquesmentioning

confidence: 99%

Geographic mapping model for underground structural deformation monitoring

Zheng

et al. 2013

Geomatics, Natural Hazards and Risk

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Section: Underground Structural Deformation Monitoring Techniquesmentioning

confidence: 99%

Geographic mapping model for underground structural deformation monitoring

Zheng

et al. 2013

Geomatics, Natural Hazards and Risk

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“…This extensive implementation of FBG sensing has occurred because of its high sustainability, high durability, long-term stability, spatial resolution, and high immunity to electromagnetism [6][7][8][9]. Recently, a Brillouin optical time domain reflectometer was successfully implemented at the El Teniente mine in Cachapoal, Chile [10], to accurately monitor deformation in the ventilation tunnel caused by coal excavation at a nearby undercut face. Similarly, Zhao et al [11] implemented optic fiber grating-based displacement sensors to assess the safety of underground mines.…”

Section: Introductionmentioning

confidence: 99%

A Fiber Bragg Grating-Based Condition Monitoring and Early Damage Detection System for the Structural Safety of Underground Coal Mines Using the Internet of Things

Khan

Lee

et al. 2018

Journal of Sensors

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Accurate sensing is the key to structural health monitoring of underground coal mines while using fiber Bragg grating (FBG) sensors. However, the previously developed systems for structural monitoring of underground mines have been limited to monitoring without any capability of damage detection. Therefore, this study integrates a highly accurate FBG monitoring system and output-only data-driven approaches on an Internet of things (IoT)-based platform to develop a comprehensive mine structural safety system. This system relies on a Web 2.0 main server that runs data acquisition, data processing, and damage detection algorithms along with real-time information sharing at remote locations. This system was successfully implemented at the Hassan Kishore coal mine, situated in the Salt Range of Pakistan. Wavelength division multiplexing of the FBG strain sensors reliably captured the effects of dynamic and continuous coal excavation on the stability of mine roadway and access galleries. Principal component analysis, along with hierarchical clustering, was used to determine the damage indicator of the mine. The damage index was validated, showing the minimum value for 2% stiffness reduction. Thus, integration of FBG technology with the Internet can be effectively applied for early safety assessment of underground coal mines and information sharing in real time.

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“…Naruse et al conducted BOTDR monitoring in El Teniente mine, Chile. The optical fibers are set within the roadway along the roadway alignment; therefore, the roadway convergence can be measured [18]. Cheng et al measured the deformation of overlying rock layers of coal seam by employing BOTDR-based monitoring method [19].…”

Section: Introductionmentioning

confidence: 99%

Application of Distributed Optical Fiber Sensing Technology in Surrounding Rock Deformation Control of TBM-Excavated Coal Mine Roadway

Tang

Cheng

2018

Journal of Sensors

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After roadway excavation, the deformation and failure of roadway surrounding rocks typically results in roadway damage or collapse. Conventional monitoring techniques, such as extensometers, stress meters, and convergence stations, are only capable to detect the stress or strain data with the shallow layers of surrounding rocks, and they require arduous manual works. Moreover, in the abovementioned monitoring techniques, the monitoring instruments are installed behind the excavation face; therefore, the strain and deformation occurring in front of excavation face cannot be detected. In order to eliminate these shortcomings, an innovative monitoring system for surrounding rock deformation control has been developed base on Brillouin optical time domain reflectometry. Compared with conventional monitoring systems, the proposed system provides a reliable, accurate, and real-time monitoring measure for roadway surrounding rock deformation control over wide extension. The optical fiber sensors are installed in boreholes which are situated ahead of the excavation face; therefore, the sensors can be protected well and the surrounding rock deformation behaviors can be studied. The proposed system has been applied within a TBM-excavated roadway in Zhangji coal mine, China. The surrounding rock deformation behaviors have been detected accurately, and the monitoring results provided essential references for surrounding rock deformation control works.

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Application of a distributed fibre optic strain sensing system to monitoring changes in the state of an underground mine

Cited by 65 publications

References 11 publications

Geographic mapping model for underground structural deformation monitoring

Geographic mapping model for underground structural deformation monitoring

A Fiber Bragg Grating-Based Condition Monitoring and Early Damage Detection System for the Structural Safety of Underground Coal Mines Using the Internet of Things

Application of Distributed Optical Fiber Sensing Technology in Surrounding Rock Deformation Control of TBM-Excavated Coal Mine Roadway

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