Rolling stone positioning and dynamic parametric inversion based on seismic signals

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (17) : 19-26.

WANG Dongpo, CHEN Huijuan, LI Wei, YAN Shuaixing, CHEN Zheng

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Abstract

Rockfall Information can be obtained quickly and accurately utilizing its generated seismic signals, which is important for hazard assessment. In-situ tests were conducted with rockfalls impacting on the slope, revealing the time-frequency domain characteristics of the generated signals. The rockfall locations determined by the arrival-time-based method and polarization analysis were compared. Empirical models for estimating the rockfall volume and impact velocity with seismic signals were developed using the dimensional analysis method. The results showed that seismic signals generated by a rockfall impact during the bouncing phase are characterized by a short duration and broad-band "triangular" pulse, which can be helpful in identifying rockfall hazards. The spatial location of the rockfall was calculated, combining the source localization theory using the arrival-time-based and the polarization analysis methods. We found that the arrival-time-based method performs better than the latter method in terms of localization accuracy, and its average relative error does not exceed 10%. The volume and impact velocity of rockfall predicted by the established dimensionless inversion model are basically consistent with the actual results, with an average prediction error of less than 20%. The results of present study may provide theoretical and technical support for emergency rescue of rockfall hazards using seismic signals.

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rockfall / seismic signal / seismic source localization / inversion of dynamic parameters / in-situ test

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WANG Dongpo, CHEN Huijuan, LI Wei, YAN Shuaixing, CHEN Zheng. Rolling stone positioning and dynamic parametric inversion based on seismic signals[J]. Journal of Vibration and Shock, 2024, 43(17): 19-26

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