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Journal of Sensors
Volume 2015 (2015), Article ID 678634, 8 pages
http://dx.doi.org/10.1155/2015/678634
Research Article

Application of Distributed Optical Fiber Sensing Technology in the Anomaly Detection of Shaft Lining in Grouting

1Resources and Geosciences College, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
2Department of Geo-Engineering & Geo-Informatics, Nanjing University, Nanjing, Jiangsu 210023, China
3Pingdingshan Coal Co., Ltd., Pingdingshan, Henan 467000, China
4Suzhou Nanzee Sensing Technology Co., Ltd., Suzhou, Jiangsu 215123, China

Received 17 October 2014; Revised 1 February 2015; Accepted 2 February 2015

Academic Editor: Zhenhua Zhu

Copyright © 2015 Chunde Piao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The rupture of the shaft lining caused by grouting has seriously undermined the safety in coal mining. Based on BOTDR distributed optical fiber sensing technology, this paper studied the layout method of optical fiber sensors and the anomaly detection method of the deformation and obtained the evolution law of shaft deformation triggered by grouting. The research results showed that the bonding problem of optical fiber sensors in damp environment could be effectively solved, by applying the binder consisting of sodium silicate and cement. Through BOTDR-based deformation detection, the real-time deformation of the shaft lining caused by grouting was immediately spotted. By comparing the respective strain of shaft lining deformation and concrete deformation, the risk range of shaft lining grouting was identified. With the additional strain increment of the shaft lining triggered by each process of grouting, the saturated condition of grouting volume in strata was analyzed, providing an important technical insight into the field construction and the safety of the shaft lining.