Time-frequency characteristics of acoustic-electric signals induced by coal fracture under uniaxial compression based on full-waveform

LOU Quan; HE Xue-qiu; SONG Da-zhao; LI Zhen-lei; WANG An-hu; SUN Ran

doi:10.13374/j.issn2095-9389.2019.07.005

Volume 41 Issue 7

Jul. 2019

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LOU Quan, HE Xue-qiu, SONG Da-zhao, LI Zhen-lei, WANG An-hu, SUN Ran. Time-frequency characteristics of acoustic-electric signals induced by coal fracture under uniaxial compression based on full-waveform[J]. Chinese Journal of Engineering, 2019, 41(7): 874-881. doi: 10.13374/j.issn2095-9389.2019.07.005

Citation:

LOU Quan, HE Xue-qiu, SONG Da-zhao, LI Zhen-lei, WANG An-hu, SUN Ran. Time-frequency characteristics of acoustic-electric signals induced by coal fracture under uniaxial compression based on full-waveform[J]. Chinese Journal of Engineering, 2019, 41(7): 874-881. doi: 10.13374/j.issn2095-9389.2019.07.005

Citation:

LOU Quan, HE Xue-qiu, SONG Da-zhao, LI Zhen-lei, WANG An-hu, SUN Ran. Time-frequency characteristics of acoustic-electric signals induced by coal fracture under uniaxial compression based on full-waveform[J]. Chinese Journal of Engineering, 2019, 41(7): 874-881. doi: 10.13374/j.issn2095-9389.2019.07.005

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Time-frequency characteristics of acoustic-electric signals induced by coal fracture under uniaxial compression based on full-waveform

doi: 10.13374/j.issn2095-9389.2019.07.005

LOU Quan^{1, 2, 3},
HE Xue-qiu^{1, 3
,
,},
SONG Da-zhao¹,
LI Zhen-lei¹,
WANG An-hu¹,
SUN Ran¹

1.
School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
2.
School of Municipal and Environmental Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
3.
School of Emergency Management and Safety Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China

More Information

Corresponding author: HE Xue-qiu, E-mail: hexq@ustb.edu.cn
Received Date: 2018-05-28
Publish Date: 2019-07-01

Abstract

Abstract

The geological conditions of coal mines in China are complicated. In recent years, with the continuous increase of intensity and depth of coal mining, coal and rock dynamic disasters are becoming more and more serious, and an important factor threatening the safety of coal mining. The accurate monitoring and early warning of coal and rock dynamic disasters are of great significance for disaster prevention. A large number of experiments conducted on both laboratory and field scales have demonstrated that the energy accumulated in rock material under loading can be released in the forms of acoustic emission (AE), electromagnetic radiation (EMR), etc. Therefore, AE and EMR, as the real-time, dynamic and continuous geophysical monitoring methods, have been widely used and played important roles in the field of monitoring and early-warning of coal and rock dynamic disasters in mines. To further study the time-frequency characteristics of AE and EMR and the relationships between these characteristics and load, and to provide the experimental basis for the monitoring and early warning of coal and rock dynamic disasters, an acoustic-electric full-waveform synchronous acquisition system of coal and rock fracture under loading was constructed in this paper. Using this system, the full-waveforms of AE and EMR of failure processes of coal samples under uniaxial compression were collected. The correlations among AE energy, EMR energy and load drop were studied, and the spectral characteristics of AE and EMR were analyzed. The results show that, (1) obvious acoustic-electric signals are emitted during the process of coal failure under loading. EMR is the paroxysmal signal, only accompanied by load drop and higher intensity AE. (2) Compared with AE, EMR has a higher correlation with load drop. There are high positive correlations among the cumulative values, relating to the cumulative released energy of coal fracture under loading, of AE energy, EMR energy and load drop. (3) The superiority frequency band of EMR is narrower than that of AE, with the former mainly concentrated in 1-25 kHz and the latter mainly in 1-280 kHz. Influenced by the initiation and propagation of the same crack, AE and EMR have similar low frequency components in the spectrum and main-frequency distribution.
- coal fracture,
- full-waveform,
- acoustic emission,
- electromagnetic radiation,
- time-frequency characteristics

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References(26)

References

[1]	Yamada I, Masuda K, Mizutani H. Electromagnetic and acoustic emission associated with rock fracture. Phys Earth Planet Inter, 1989, 57(1-2): 157 doi: 10.1016/0031-9201(89)90225-2
[2]	李忠輝, 婁全, 王恩元, 等. 頂板巖石受壓破壞過程中聲電熱效應研究. 中國礦業大學學報, 2016, 45(6): 1098 https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201606003.htm Li Z H, Lou Q, Wang E Y, et al. Experimental study of acoustic-electric and thermal infrared characteristics of roof rock failure. J China Univ Min Technol, 2016, 45(6): 1098 https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201606003.htm
[3]	Mastrogiannis D, Antsygina T N, Chishko K A, et al. Relationship between electromagnetic and acoustic emissions in deformed piezoelectric media: microcracking signals. Int J Solids Struct, 2015, 56-57: 118 doi: 10.1016/j.ijsolstr.2014.11.027
[4]	Song D Z, Wang E Y, Song X Y, et al. Changes in frequency of electromagnetic radiation from loaded coal rock. Rock Mech Rock Eng, 2016, 49(1): 291 doi: 10.1007/s00603-015-0738-6
[5]	Carpinteri A, Lacidogna G, Pugno N. Structural damage diagnosis and life-time assessment by acoustic emission monitoring. Eng Fract Mech, 2007, 74(1-2): 273 doi: 10.1016/j.engfracmech.2006.01.036
[6]	王恩元, 何學秋, 李忠輝, 等. 煤巖電磁輻射技術及其應用. 1版. 北京: 科學出版社, 2009 Wang E Y, He X Q, Li Z H, et al. Electromagnetic Radiation Technology of Coal and Rock and Its Application. 1st Ed. Beijing: Science Press, 2009
[7]	Donner R V, Potirakis S M, Balasis G, et al. Temporal correlation patterns in pre-seismic electromagnetic emissions reveal distinct complexity profiles prior to major earthquakes. Phys Chem Earth Part A/B/C, 2015, 85-86: 44 doi: 10.1016/j.pce.2015.03.008
[8]	何學秋, 竇林名, 牟宗龍, 等. 煤巖沖擊動力災害連續監測預警理論與技術. 煤炭學報, 2014, 39(8): 1485 https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201408016.htm He X Q, Dou L M, Mu Z L, et al. Continuous monitoring and warning theory and technology of rock burst dynamic disaster of coal. J China Coal Soc, 2014, 39(8): 1485 https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201408016.htm
[9]	劉娟紅, 趙力, 宋少民, 等. 混凝土硫酸鹽腐蝕損傷的聲波與聲發射變化特征及機理. 工程科學學報, 2016, 38(8): 1075 https://www.cnki.com.cn/Article/CJFDTOTAL-BJKD201608005.htm Liu J H, Zhao L, Song S M, et al. Ultrasonic velocity and acoustic emission properties of concrete eroded by sulfate and its damage mechanism. Chin J Eng, 2016, 38(8): 1075 https://www.cnki.com.cn/Article/CJFDTOTAL-BJKD201608005.htm
[10]	張進, 柴孟瑜, 項靖海, 等. 基于聲發射監測的316LN不銹鋼的疲勞損傷評價. 工程科學學報, 2017, 40(4): 461 https://www.cnki.com.cn/Article/CJFDTOTAL-BJKD201804009.htm Zhang J, Chai M Y, Xiang J H, et al. Fatigue damage evaluation of 316LN stainless steel using acoustic emission monitoring. Chin J Eng, 2017, 40(4): 461 https://www.cnki.com.cn/Article/CJFDTOTAL-BJKD201804009.htm
[11]	Niccolini G, Xu J, Manuello A, et al. Onset time determination of acoustic and electromagnetic emission during rock fracture. Prog Electromagn Res Lett, 2012, 35: 51 doi: 10.2528/PIERL12070203
[12]	Wang E Y, He X Q, Liu X F, et al. A non-contact mine pressure evaluation method by electromagnetic radiation. J Appl Geophys, 2011, 75(2): 338 doi: 10.1016/j.jappgeo.2011.06.028
[13]	Wang E Y, He X Q, Liu X F, et al. Comprehensive monitoring technique based on electromagnetic radiation and its applications to mine pressure. Safety Sci, 2012, 50(4): 885 doi: 10.1016/j.ssci.2011.08.013
[14]	Frid V, Vozoff K. Electromagnetic radiation induced by mining rock failure. Int J Coal Geol, 2005, 64(1-2): 57 doi: 10.1016/j.coal.2005.03.005
[15]	Rabinovitch A, Frid V, Bahat D. Surface oscillations-a possible source of fracture induced electromagnetic radiation. Tectonophysics, 2007, 431(1-4): 15 doi: 10.1016/j.tecto.2006.05.027
[16]	Rabinovitch A, Frid V, Bahat D. Directionality of electromagnetic radiation from fractures. Int J Fract, 2017, 204(2): 239 doi: 10.1007/s10704-016-0178-7
[17]	李夕兵, 萬國香, 周子龍. 巖石破裂電磁輻射頻率與巖石屬性參數的關系. 地球物理學報, 2009, 52(1): 253 https://www.cnki.com.cn/Article/CJFDTOTAL-DQWX200901032.htm Li X B, Wan G X, Zhou Z L. The relation between the frequency of electromagnetic radiation (EMR) induced by rock fracture and attribute parameters of rock masses. Chin J Geophys, 2009, 52(1): 253 https://www.cnki.com.cn/Article/CJFDTOTAL-DQWX200901032.htm
[18]	Zhao Y X, Jiang Y D. Acoustic emission and thermal infrared precursors associated with bump-prone coal failure. Int J Coal Geol, 2010, 83(1): 11 doi: 10.1016/j.coal.2010.04.001
[19]	趙揚鋒, 潘一山, 劉玉春, 等. 單軸壓縮條件下煤樣電荷感應試驗研究. 巖石力學與工程學報, 2011, 30(2): 306 https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201102013.htm Zhao Y F, Pan Y S, Liu Y C, et al. Experimental study of charge induction of coal samples under uniaxial compression. Chin J Rock Mech Eng, 2011, 30(2): 306 https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201102013.htm
[20]	Potirakis S M, Karadimitrakis A, Eftaxias K. Natural time analysis of critical phenomena: the case of pre-fracture electromagnetic emissions. Chaos, 2013, 23(2): 023117-1 doi: 10.1063/1.4807908
[21]	Potirakis S M, Mastrogiannis D. Critical features revealed in acoustic and electromagnetic emissions during fracture experiments on LiF. Physica A, 2017, 485: 11 doi: 10.1016/j.physa.2017.05.025
[22]	Gade S O, Weiss U, Peter M A, et al. Relation of electromagnetic emission and crack dynamics in epoxy resin materials. J Nondestruct Eval, 2014, 33(4): 711 doi: 10.1007/s10921-014-0265-5
[23]	Gade S O, Alaca B B, Sause M G R. Determination of crack surface orientation in carbon fibre reinforced polymers by measuring electromagnetic emission. J Nondestruct Eval, 2017, 36: 21 doi: 10.1007/s10921-017-0403-y
[24]	Carpinteri A, Lacidogna G, Borla O, et al. Electromagnetic and neutron emissions from brittle rocks failure: experimental evidence and geological implications. Sādhanā, 2012, 37(1): 59
[25]	Zhu T, Zhou J G, Wang H Q. Electromagnetic emissions during dilating fracture of a rock. J Asian Earth Sci, 2013, 73: 252 doi: 10.1016/j.jseaes.2013.05.004
[26]	Ohnaka M, Mogi K. Frequency characteristics of acoustic emission in rocks under uniaxial compression and its relation to the fracturing process to failure. J Geophys Res, 1982, 87(B5): 3873 doi: 10.1029/JB087iB05p03873