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

Chunde Piao 1, Jun Yuan 1, Bin Shi 2, Haijun Lu 3, and  Guangqing Wei 4

1 Resources and Geosciences College, China University of Mining and Technology, Xuzhou, Jiangsu 221116, china

2 Department of Geo-engineering & Geo-informatics, Nanjing University, Nanjing, Jiangsu 210023, China

3 Pingdingshan Coal Co., Ltd., Pingdingshan, Henan 467000, China

4 Suzhou Nanzee Sensing Technology Co.,Ltd., Suzhou, Jiangsu 215123, China

Journal of Sensors 2015 Article ID 678634

http://www.hindawi.com/journals/js/aa/678634/

Abstract: The rupture of the shaft lining caused by grouting has seriously undermined the safety in coalmining. 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 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.

Keywords: shaft lining, BOTDR, optical fiber sensors, anomaly detection

REFERENCES

H. Q. Liang, G. S. Zhao, and H. C. Liang, “Theory and practice in the control of shaft-lining rupture through soil grouting,” China Safety Science Journal, vol. 19, no. 1, pp. 5–9, 2009.  

H.-C. Xia and M.-A. Tang, “Mechanism and application of grouting into topsoil to prevent shaft lining from fracturing,” Journal of Mining and Safety Engineering, vol. 26, no. 4, pp. 407–412, 2009.  

X. D. Zhang, Y. R. Han, S. J. Liu, and C. S. Su, “Deformation prediction analysis model for the mine shaft-wall,” Journal of Liaoning Technical University (Natural Science), vol. 33, no. 8, pp. 1070–1073, 2014.  

C. Zhang, W. H. Yang, J. G. Qi, H. P. Li, and T. Zhang, “Construction technology and monitoring analysis of a new single-layer shaft lining in deep aqueous bedrock during freezing sinking,” Chinese Journal of Rock Mechanics and Engineering, vol. 31, no. 2, pp. 337–346, 2012. 

H.-C. Liang, G.-Q. Zhou, G.-S. Zhao, and B. Liao, “Strain characters of shaft lining crack,” Journal of the China Coal Society, vol. 35, no. 2, pp. 198–202, 2010.  

K. Tsusaka, D. Inagaki, M. Nago, K. Kamemura, M. Matsubara, and M. Shigehiro, “Relationship between rock mass properties and damage of a concrete lining during shaft sinking in the horonobe underground research laboratory project,” in Proceedings of the World Tunnel Congress: Underground—The Way to the Future (WTC '13), G. Anagnostou and H. Ehrbar, Eds., pp. 2014–2021, June 2013. 

D. M. Pan, H. Zhang, and X. J. Zhao, “Application of ground radar tom ine shaft liner grouting and result inspection,” Coal Science and Technology, vol. 35, no. 2, pp. 24–26, 2007. View at Google Scholar

P.-S. Zhang and L.-Q. Guo, “Detection technology by reflection wave for backwall grouting quality of a vertical shaft,” Journal of Mining & Safety Engineering, vol. 28, no. 1, pp. 115–121, 2011.  

N. W. Xu, C. A. Tang, L. C. Li et al., “Microseismic monitoring and stability analysis of the left bank slope in Jinping first stage hydropower station in southwestern China,” International Journal of Rock Mechanics and Mining Sciences, vol. 48, no. 6, pp. 950–963, 2011.  

M. Kihara, K. Hiramatsu, M. Shima, and S. Ikeda, “Distributed optical fiber strain sensor for detecting river embankment collapse,” IEICE Transactions on Electronics, no. 4, pp. 952–960, 2002. 

K. Komatsu, K. Fujihashi, and M. Okutsu, “Application of optical sensing technology to the civil engineering field with optical fiber strain measurement device (BOTDR),” in Advanced Sensor Systems and Applications, vol. 4920 of Proceedings of SPIE, pp. 352–361, 2002.  

H. Ohno, H. Naruse, T. Kurashima, A. Nobiki, Y. Uchiyama, and Y. Kusakabe, “Application of Brillouin scattering-based distributed optical fiber strain sensor to actual concrete piles,” IEICE Transactions on Electronics, no. 4, pp. 945–951, 2002. View at Google Scholar · View at Scopus

H. Ohno, H. Naruse, M. Kihara, and A. Shimada, “Industrial applications of the BOTDR optical fiber strain sensor,” Optical Fiber Technology, vol. 7, no. 1, pp. 45–64, 2001.  

N. Yasue, H. Naruse, J.-I. Masuda, H. Kinq, T. Nakamura, and T. Yamaura, “Concrete pipe strain measurement using optical fiber sensor,” IEICE Transactions on Electronics, no. 3, pp. 468–474, 2000. 

H. Naruse, Y. Uchiyama, T. Kurashima, and S. Unno, “River levee change detection using distributed fiber optic strain sensor,” IEICE Transactions on Electronics, no. 3, pp. 462–467, 2000. 

H.-H. Zhu, J.-H. Yin, L. Zhang, W. Jin, and J.-H. Dong, “Monitoring internal displacements of a model dam using FBG sensing bars,” Advances in Structural Engineering, vol. 13, no. 2, pp. 249–261, 2010.

H.-H. Zhu, A. N. L. Ho, J.-H. Yin, H. W. Sun, H.-F. Pei, and C.-Y. Hong, “An optical fibre monitoring system for evaluating the performance of a soil nailed slope,” Smart Structures and Systems, vol. 9, no. 5, pp. 393–410, 2012. 

H.-H. Zhu, B. Shi, J.-F. Yan, J. Zhang, C.-C. Zhang, and B.-J. Wang, “Fiber Bragg grating-based performance monitoring of a slope model subjected to seepage,” Smart Materials and Structures, vol. 23, no. 9, Article ID 095027, 2014.

J. Q. Gao, B. Shi, W. Zhang, D. Zhang, and H. Zhu, “An experimental study for measuring the distributed strain of reinforced concrete beam using BOTDR,” China Civil Engineering Journal, vol. 38, no. 9, pp. 74–79, 2005.

C.-D. Piao, B. Shi, G.-Q. Wei, Y.-Q. Zhu, and D. Zhang, “Application of distributed fiber optic sensing techniques in bored pile detection,” Chinese Journal of Geotechnical Engineering, vol. 30, no. 7, pp. 976–981, 2008.

B. Shi, H. Xu, B. Chen et al., “A feasibility study on the application of fiber-optic distributed sensors for strain measurement in the Taiwan strait tunnel project,” Marine Georesources and Geotechnology, vol. 21, no. 3-4, pp. 333–343, 2003. 

Y.-S. Wang, W.-H. Yang, J.-H. Huang, L. Song, and Y.-L. Ren, “Study of freeze sinking period concrete strain of outer shaft wall of Longgu Coal Mine auxiliary shaft,” Journal of the China Coal Society, vol. 31, no. 3, pp. 296–300, 2006.

Z.-W. Qian, Z.-Q. Jiang, L.-W. Cao, and Q. Sun, “Research on backfill grouting based on surrounding rock loose circle theory,” Journal of the China Coal Society, vol. 38, no. 2, pp. 189–193, 2013.

J. Wu and W. W. Qian, “Horizontal ultimate bearing capacity test of high strength reinforced concrete shaft lining,” Journal of Anhui University of Science and Technology (Natural Science), vol. 32, no. 4, pp. 56–59, 2012.

T. Han, W.-H. Yang, Y.-L. Ren, and Z.-J. Yang, “Horizontal ultimate bearing capacity of encased steel concrete shaft lining,” Journal of Mining and Safety Engineering, vol. 28, no. 2, pp. 181–186, 2011.

D. Zhang, B. Shi, and H. Z. Xu, “The BOTDR-based strain monitoring for tunnel,” Journal of Engineering Geology, vol. 12, no. 4, pp. 422–426, 2004.

G.-Q. Wei, B. Shi, J.-X. Jia, S. Hu, K. Li, and D. Zhang, “Application of distributed optical fiber sensing to testing inner force of prefabricated piles,” Chinese Journal of Geotechnical Engineering, vol. 31, no. 6, pp. 911–916, 2009.

H.-L. Fu, “Strain variation regularity of shaft lining during grouting reinforcement process for deep topsoil ground,” Rock and Soil Mechanics, vol. 24, pp. 21–23, 2003.

G.-Q. Zhou, Y.-Z. Liu, X.-W. Feng, and G.-S. Zhao, “Application and effect of grouting in surrounding soil on releasing and restraining additional stress of shaft lining,” Chinese Journal of Geotechnical Engineering, vol. 27, no. 7, pp. 742–745, 2005.