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Microseismic Dynamic Response and Multi-Source Warning during Rockburst Monitoring Based on Weight Decision Analysis

Author

Listed:
  • Jiawei Tian

    (School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China)

  • Dong Chen

    (State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China)

  • Zhentang Liu

    (School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China)

  • Weichen Sun

    (School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China)

Abstract

To prevent rockburst disasters and improve the accuracy of warnings for rockburst, based on the microseismic data of the 1366 working face of Hengda Coal Mine collected by the microseismic monitoring system, Fourier transform, wavelet packet transform, and Hilbert–Huang transform analysis methods are used for time-frequency domain joint analysis. The time-frequency differences of the main frequency, amplitude, frequency band percentage, and instantaneous energy of the high-energy microseismic event and the events before high-energy microseismic event are obtained. The analysis shows that the high-energy event has obvious low frequency characteristics, and when the high-energy event occurs, the instantaneous energy shows an obvious “inverted V” trend. At the same time, it is found that the acoustoelectric indexes show a trend of “rising” or “inverted V” when the high-energy event occurs. On this basis, the unascertained measure comprehensive evaluation model of rock burst hazard is established by analytic hierarchy process (AHP). Based on the analysis of microseismic data and the acoustoelectric index of the 1366 working face in Hengda coal mine, it is of great significance to determine the warning indicators for rockburst, improve the accuracy of uncertainty quantitative analysis for rockburst, and improve the discrimination accuracy of rockburst risk.

Suggested Citation

  • Jiawei Tian & Dong Chen & Zhentang Liu & Weichen Sun, 2022. "Microseismic Dynamic Response and Multi-Source Warning during Rockburst Monitoring Based on Weight Decision Analysis," IJERPH, MDPI, vol. 19(23), pages 1-22, November.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:23:p:15698-:d:984196
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