Chaotic characteristics analysis of tunnel blasting vibration signals

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (3) : 238-244.

XIE Quanmin1,2， JIA Yongsheng1,2， DING Kai3， ZHANG Jie4， LING Zhendong4， LIU Dingshen5

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Abstract

Based on the chaos theory, the phase space reconstruction of the vibration response time series of the existing tunnel under the action of the blasting of the adjacent tunnel and the blasting of the upper span tunnel was carried out by using the attractor and Lyapunov The core parameters, such as index and correlation dimension, were calculated to analyze the chaotic characteristics of tunnel blasting vibration response signal. After calculation, the phase space reconstruction of the vibration response signal of the existing tunnel under the blasting action of the adjacent tunnel has strange attractor, and the Lyapunov index is greater than 0. It can be judged that it has chaotic characteristics. The Lyapunov index of the vibration response signal of the existing tunnel under the blasting action of the upper span tunnel is greater than 0. It shows that it also has chaotic characteristics. The research shows that the blasting vibration signal of the tunnel has chaotic characteristics. As the blasting distance between the drilling and blasting working face and the existing tunnel decreases, the value becomes larger, the chaotic characteristic of the tunnel blasting vibration response increases, and the rational optimization of blasting parameters and blasting should be strengthened. Vibration real-time monitoring to ensure construction quality and blasting safety.

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tunnel blasting / blasting vibration / chaos / phase space reconstruction

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XIE Quanmin1,2， JIA Yongsheng1,2， DING Kai3， ZHANG Jie4， LING Zhendong4， LIU Dingshen5. Chaotic characteristics analysis of tunnel blasting vibration signals[J]. Journal of Vibration and Shock, 2022, 41(3): 238-244

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