Earthquakes and Structures

  • 제11권6호
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  • Pages.1143-1164
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  • 2016
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
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Micro-seismic monitoring in mines based on cross wavelet transform

  • Huang, Linqi (School of Resources and Safety Engineering, Central South University) ;
  • Hao, Hong (Centre for Infrastructural Monitoring and Protection, School of Civil and Mechanical Engineering, Curtin University) ;
  • Li, Xibing (School of Resources and Safety Engineering, Central South University) ;
  • Li, Jun (Centre for Infrastructural Monitoring and Protection, School of Civil and Mechanical Engineering, Curtin University)
  • 투고 : 2016.04.01
  • 심사 : 2016.06.26
  • 발행 : 2016.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Time Delay of Arrival (TDOA) estimation methods based on correlation function analysis play an important role in the micro-seismic event monitoring. It makes full use of the similarity in the recorded signals that are from the same source. However, those methods are subjected to the noise effect, particularly when the global similarity of the signals is low. This paper proposes a new approach for micro-seismic monitoring based on cross wavelet transform. The cross wavelet transform is utilized to analyse the measured signals under micro-seismic events, and the cross wavelet power spectrum is used to measure the similarity of two signals in a multi-scale dimension and subsequently identify TDOA. The offset time instant associated with the maximum cross wavelet transform spectrum power is identified as TDOA, and then the location of micro-seismic event can be identified. Individual and statistical identification tests are performed with measurement data from an in-field mine. Experimental studies demonstrate that the proposed approach significantly improves the robustness and accuracy of micro-seismic source locating in mines compared to several existing methods, such as the cross-correlation, multi-correlation, STA/LTA and Kurtosis methods.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

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  2. Noise robust bird call localisation using the generalised cross-correlation with phase transform in the wavelet domain vol.146, pp.6, 2016, https://doi.org/10.1121/1.5138593