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Proceedings Paper

Continuous monitoring of mining induced strain in a road pavement using fibre Bragg grating sensors
Author(s): B. E. Whelan; M. Brunton; Giorgio Nosenzo; Daryl Kay; Henk Buys
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Paper Abstract

This paper describes the application of Fibre Bragg Grating (FBG) based sensors for monitoring road pavement strains caused by mining induced ground subsidence as a result of underground longwall coal mining beneath a major highway in New South Wales, Australia. After a lengthy planning period, the risks to the highway pavement were successfully managed by the highway authority and the mining company through a technical committee. The technical committee comprised representatives of the mining company, the highway authority and specialists in the fields of pavement engineering, geotechnical engineering and subsidence. An important component of the management strategy is the installation of a total of 840 strain and temperature sensors in the highway pavement using FBG arrays encapsulated in glass-fibre composite cables. The sensors and associated demodulation equipment provide continuous strain measurements along the pavement, enabling on-going monitoring of the effects of mining subsidence on the pavement and timely implementation of planned mitigation and response measures to ensure the safety and serviceability of the highway throughout the mining period.

Paper Details

Date Published: 30 January 2012
PDF: 12 pages
Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83513I (30 January 2012); doi: 10.1117/12.921488
Show Author Affiliations
B. E. Whelan, Monitor Optics Systems Ltd. (Australia)
M. Brunton, Monitor Optics Systems Ltd. (Australia)
Giorgio Nosenzo, Monitor Optics Systems Ltd. (Ireland)
Daryl Kay, Mine Subsidence Engineering Consultants (Australia)
Henk Buys, AECOM (Australia)

Published in SPIE Proceedings Vol. 8351:
Third Asia Pacific Optical Sensors Conference
John Canning; Gangding Peng, Editor(s)

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