Proceedings of the 9th China-Russia Symposium "Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection" (COAL 2018)

Time-frequency Characteristics of Micro-seismic Signals Before and after Rock Burst

Authors
Xinxin Wang, Shijian Yu, Dawei Yin
Corresponding Author
Xinxin Wang
Available Online October 2018.
DOI
https://doi.org/10.2991/coal-18.2018.2How to use a DOI?
Keywords
rock burst, micro-seismic signal, time-frequency characteristics, precursory information
Abstract

In this paper, the time-frequency characteristics of micro-seismic signals before and after the rock burst occurred in the 1300 working face of a coal mine in eastern China were analyzed. The results show that before rock burst occurrence, the amplitude was small with gentle vibration fluctuations. And the spectrum distribution was concentrated in the high frequency band, belonging to the random vibration signal. However, the micro-seismic signal appeared obvious change at one hour before rock burst occurrence. The amplitude was increased, with obvious vibration fluctuations, and the frequency spectrum distribution moved to the low frequency band. When rock burst occurred, the amplitude increased by more than ten times, and the frequency spectrum was mainly concentrated in the low frequency band of 0~80 Hz. At the end of the rock burst, the amplitude was reduced. And the low frequency component was reduced, and the spectrum distribution was mainly concentrated in the high frequency band of 130~350 Hz. It can be concluded that rock burst had obvious precursory features before it occurred, therefore the precursory information can be used to predict rock burst occurrence.

Copyright
© 2018, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 9th China-Russia Symposium "Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection" (COAL 2018)
Series
Advances in Engineering Research
Publication Date
October 2018
ISBN
978-94-6252-570-2
ISSN
2352-5401
DOI
https://doi.org/10.2991/coal-18.2018.2How to use a DOI?
Copyright
© 2018, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Xinxin Wang
AU  - Shijian Yu
AU  - Dawei Yin
PY  - 2018/10
DA  - 2018/10
TI  - Time-frequency Characteristics of Micro-seismic Signals Before and after Rock Burst
BT  - Proceedings of the 9th China-Russia Symposium "Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection" (COAL 2018)
PB  - Atlantis Press
SP  - 9
EP  - 12
SN  - 2352-5401
UR  - https://doi.org/10.2991/coal-18.2018.2
DO  - https://doi.org/10.2991/coal-18.2018.2
ID  - Wang2018/10
ER  -