Continuous monitoring of mining induced strain in a road pavement using fibre Bragg grating sensors

B. E. Whelan; M. Brunton; Giorgio Nosenzo; Daryl Kay; Henk Buys

doi:10.1117/12.921488

30 January 2012 Continuous monitoring of mining induced strain in a road pavement using fibre Bragg grating sensors

B. E. Whelan, M. Brunton, Giorgio Nosenzo, Daryl Kay, Henk Buys

Proceedings Volume 8351, Third Asia Pacific Optical Sensors Conference; 83513I (2012) https://doi.org/10.1117/12.921488
Event: Asia Pacific Optical Sensors Conference, 2012, Sydney, Australia

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.

Citation Download Citation

B. E. Whelan, M. Brunton, Giorgio Nosenzo, Daryl Kay, and Henk Buys "Continuous monitoring of mining induced strain in a road pavement using fibre Bragg grating sensors", Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83513I (30 January 2012); https://doi.org/10.1117/12.921488

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