Validation of bare FBG sensors in monitoring compressive rock mass deformation

Gong, Hongkui, Kizil, Mehmet S., Chen, Zhongwei and Aminossadati, Saiied M. (2017). Validation of bare FBG sensors in monitoring compressive rock mass deformation. In: 2nd International Conference of Fibre-optic and Photonic Sensors for Industrial and Safety Applications. 2nd International Conference of Fibre-optic and Photonic Sensors for Industrial and Safety Applications, Brisbane, QLD, Australia, (85-90). 8 - 10 January 2017. doi:DOI 10.1109/OFSIS.2017.20

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Author Gong, Hongkui
Kizil, Mehmet S.
Chen, Zhongwei
Aminossadati, Saiied M.
Title of paper Validation of bare FBG sensors in monitoring compressive rock mass deformation
Conference name 2nd International Conference of Fibre-optic and Photonic Sensors for Industrial and Safety Applications
Conference location Brisbane, QLD, Australia
Conference dates 8 - 10 January 2017
Convener IEEE
Proceedings title 2nd International Conference of Fibre-optic and Photonic Sensors for Industrial and Safety Applications
Place of Publication Piscataway, NJ, United States
Publisher Institute for Electrical and Electronics Engineers
Publication Year 2017
Sub-type Fully published paper
DOI DOI 10.1109/OFSIS.2017.20
Open Access Status Not yet assessed
ISBN 9781509050543
9781509050550
Start page 85
End page 90
Total pages 6
Language eng
Abstract/Summary Geotechnical stability is a major concern for the long-term safety and integrity in underground coal mines.The major issues with the current roof stability monitoring system in underground coal mines include lackof systematic real time data recording scheme and using electrical sensing components that are notintrinsically safe in underground explosive workplace. Although an advanced system based on fibre opticsensing (FOS) technologies have increasingly drawn attention by mining industry, their applications in coalmines are still challenged by a number of factors, such as the survivability in large strain range, appropriatefibre encapsulation and installation methods and minimisation of measurement errors due to the straintransfer loss. This paper presents the results of preliminary experiment in developing fibre optic based roofstability monitoring system forunderground coal mines, including the validation of surface mounting bareFBGs in rock mass compressive test. The accuracy of the bare FBG sensors in measuring compressivestrain for rock mass are validated against the electrical strain gauges and linear variable differentialtransducer (LVDT). Using the stress-strain curve and Young’s modulus of the standard samples as areference, the experiment results show that the bare FBG and electrical strain gauges can provide accurateand reliable compressive strain measurements for material with different mechanical properties.
Keyword Fibre Bragg Grating
Strain validation
Strain gauge
Linear variable differential transducer
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Mechanical & Mining Engineering Publications
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Created: Sun, 23 Jul 2017, 10:12:54 EST by Dr Saiied Aminossadati on behalf of School of Mechanical and Mining Engineering