Experimental investigation on synergetic prediction of rockburst using the dominant-frequency entropy of acoustic emission

Chunlai Wang (), Cong Cao, Yubo Liu, Changfeng Li, Guangyong Li and Hui Lu
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Chunlai Wang: China University of Mining and Technology Beijing
Cong Cao: China University of Mining and Technology Beijing
Yubo Liu: China University of Mining and Technology Beijing
Changfeng Li: China University of Mining and Technology Beijing
Guangyong Li: China University of Mining and Technology Beijing
Hui Lu: Colorado School of Mines

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2021, vol. 108, issue 3, No 39, 3253-3270

Abstract: Abstract Rockburst is one of the critical safety concerns for underground engineering. The acoustic emission (AE) activity that occurs during rockburst is one of its notable characteristics. Because rockburst is induced by complexity factors, the prediction of rockburst has been investigated widely, yet few methods have been applied in depth. In this study, dynamic process of rockburst was investigated, and the information entropy of the dominant frequency was determined to be an indicator of rockburst. A series of true triaxial tests were conducted, and AE signals associated with the evolution of rock failure were collected. The AE data were treated with the fast Fourier transform to acquire the dominant frequency. Then, the information entropy of the dominant frequency was obtained, and a significant drop of the entropy value right after it reached the peak was observed. Finally, based on the comprehensive analysis of AE energy, dominant-frequency entropy, and other precursory information of rock failure, a multiparameter synergetic method of predicting rockburst is proposed. This research has important theoretical significance for improving the prediction accuracy of rockburst.

Keywords: Rockburst; Dominant frequency; Entropy; Synergetic prediction; Acoustic emission (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1007/s11069-021-04822-6

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