Strain monitoring in steel rock bolts using FBG sensor arrays

Martin Schroeck; Wolfgang Ecke; Andrea Graupner

doi:10.1117/12.397895

31 August 2000 Strain monitoring in steel rock bolts using FBG sensor arrays

Martin Schroeck, Wolfgang Ecke, Andrea Graupner

Proceedings Volume 4074, Applications of Optical Fiber Sensors; (2000) https://doi.org/10.1117/12.397895
Event: Symposium on Applied Photonics, 2000, Glasgow, United Kingdom

Abstract

Rock bolts replace timber sets and steel arcs in securing the structural stability of underground cavities in order to reduce the volume of excavation. Rock bolts used in the mining industry are made of steel allowing up to 20% relative elongation of the bolt. Strain measurements using Fiber-Bragg-Grating (FBG) are limited to relative strains in the order of 1%. In order to allow measurements of up to 20% relative strain, special arrangements of the FBG sensors had to be found to extend their measuring range.

Citation Download Citation

Martin Schroeck, Wolfgang Ecke, and Andrea Graupner "Strain monitoring in steel rock bolts using FBG sensor arrays", Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); https://doi.org/10.1117/12.397895

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