Geomechanics and Engineering

  • 제11권5호
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  • Pages.607-624
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  • 2016
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Blasting wave pattern recognition based on Hilbert-Huang transform

  • Li, Xuelong (Key Laboratory of Gas and Fire Control for Coal Mines, School of Safety Engineering, China University of Mining and Technology) ;
  • Wang, Enyuan (Key Laboratory of Gas and Fire Control for Coal Mines, School of Safety Engineering, China University of Mining and Technology) ;
  • Li, Zhonghui (Key Laboratory of Gas and Fire Control for Coal Mines, School of Safety Engineering, China University of Mining and Technology) ;
  • Bie, Xiaofei (Qianqiu Coal Mine, Yima Coal Mining Group Co. Ltd.) ;
  • Chen, Liang (Key Laboratory of Gas and Fire Control for Coal Mines, School of Safety Engineering, China University of Mining and Technology) ;
  • Feng, Junjun (Key Laboratory of Gas and Fire Control for Coal Mines, School of Safety Engineering, China University of Mining and Technology) ;
  • Li, Nan (State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology)
  • 투고 : 2015.12.14
  • 심사 : 2016.06.06
  • 발행 : 2016.11.25
⟨ 이전 논문 다음 논문 ⟩

초록

Rockburst is becoming more serious in Chinese coal mine. One of the effective methods to control rockburst is blasting. In the paper, we monitored and analyzed the blasting waves at different blast center distances by the Hilbert-Huang transform (HHT) in a coal mine. Results show that with the increase of blast center distance, the main frequency and amplitude of blasting waves show the decreasing trend. The attenuation of blasting waves is slower in the near blast field (10-75 m), compared with the far blast field (75-230 m). Besides, the frequency superposition phenomenon aggravates in the far field. A majority of the blasting waves energy at different blast center distances is concentrated around the IMF components 1-3. The instantaneous energy peak shows attenuation trend with the blast center distance increase, there are two obvious energy peaks in the near blast field (10-75 m), the energy spectrum appears "fat", and the total energy is greater. By contrast, there is only an energy peak in the far blast field, the energy spectrum is "thin", and the total energy is lesser. The HHT three dimensional spectrum shows that the wave energy accumulates in the time and frequency with the increasing of blast center distance.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, China University of Mining and Technology, Central Universities, Natural Science Foundation of Jiangsu Province

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피인용 문헌

  1. Spectra, energy, and fractal characteristics of blast waves vol.15, pp.1, 2018, https://doi.org/10.1088/1742-2140/aa83cd
  2. Determination of equivalent blasting load considering millisecond delay effect vol.15, pp.2, 2016, https://doi.org/10.12989/gae.2018.15.2.745
  3. Experimental investigation of predicting rockburst using Bayesian model vol.15, pp.6, 2016, https://doi.org/10.12989/gae.2018.15.6.1153
  4. New methodology to prevent blasting damages for shallow tunnel vol.15, pp.6, 2016, https://doi.org/10.12989/gae.2018.15.6.1227
  5. A stress model reflecting the effect of the friction angle on rockbursts in coal mines vol.18, pp.1, 2016, https://doi.org/10.12989/gae.2019.18.1.021
  6. Frequency Spectrum and Wavelet Packet Analyses of Blasting Vibration Signals for Different Charge Structures in Blasting Peripheral Holes vol.2020, pp.None, 2020, https://doi.org/10.1155/2020/8897441