不同倾角断层滑移型岩爆黏滑过程声电响应特征研究

doi:10.3724/1000-6915.jrme.2024.0428

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摘要 Fault stick slip instability can easily induce fault slip rockburst. In order to further explore the stick-slip evolution characteristics of faults with different dip angles and AE and charge induction multi-source precursors，bidirectional friction tests were carried out on syenitegranite with faults with different prefabricated dip angles. The accumulated energy and spectral characteristics of acoustic emission and charge induction signals during fault stick-slip were analyzed，the AE sources were located，and the nonlinear characteristics of AE and charge induction time series were studied based on multifractal theory. Three quantitative indexes(maximum multi-fractal dimension Dqmax，spectral width Δα and multi-fractal parameter Δf(?)) with good correlation with stick slip instability were constructed，and the following conclusions were drawn：(1) With the increase of fault dip angle，the fault failure mode changes from sliding failure along the plane to sliding failure through the plane，which increases the intensity and energy of AE and charge induction signals. (2) The maximum multi-fractal dimension Dqmax and spectral width Δα of the AE and charge induction signals gradually increase with the increase of fault dip angle. The maximum multifractal dimension and spectral width of the AE and charge induction signals can reflect the difference of energy released when the fault stick slip instability or severely damaged. The multi-fractal parameters Δf(?) of AE and charge induction signals are all less than 0 when the fault is instability or severely damaged.，and the critical value of Δf(?) can be used as the prediction index of fault stick slip instability and severe failure. (3) Compared with the AE and charge induction signals generated by shear slip failure along the plane of 34°and 45°faults，the AE and charge induction signals generated by 56°faults through the plane slide failure has lower dominant frequencies. It can be considered that the dominant frequencies of the AE and charge induction signals are related to fracture scale.

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	赵扬锋1
	丁玲1
	潘一山1
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	刘玉春1
	3
	龚政1

关键词 ： rock mechanics, fault slip rockburst, fault stick-slip, acoustic emission, charge induction, time- frequency characteristics

Abstract：Fault stick slip instability can easily induce fault slip rockburst. In order to further explore the stick-slip evolution characteristics of faults with different dip angles and AE and charge induction multi-source precursors，bidirectional friction tests were carried out on syenitegranite with faults with different prefabricated dip angles. The accumulated energy and spectral characteristics of acoustic emission and charge induction signals during fault stick-slip were analyzed，the AE sources were located，and the nonlinear characteristics of AE and charge induction time series were studied based on multifractal theory. Three quantitative indexes(maximum multi-fractal dimension Dqmax，spectral width Δα and multi-fractal parameter Δf(?)) with good correlation with stick slip instability were constructed，and the following conclusions were drawn：(1) With the increase of fault dip angle，the fault failure mode changes from sliding failure along the plane to sliding failure through the plane，which increases the intensity and energy of AE and charge induction signals. (2) The maximum multi-fractal dimension Dqmax and spectral width Δα of the AE and charge induction signals gradually increase with the increase of fault dip angle. The maximum multifractal dimension and spectral width of the AE and charge induction signals can reflect the difference of energy released when the fault stick slip instability or severely damaged. The multi-fractal parameters Δf(?) of AE and charge induction signals are all less than 0 when the fault is instability or severely damaged.，and the critical value of Δf(?) can be used as the prediction index of fault stick slip instability and severe failure. (3) Compared with the AE and charge induction signals generated by shear slip failure along the plane of 34°and 45°faults，the AE and charge induction signals generated by 56°faults through the plane slide failure has lower dominant frequencies. It can be considered that the dominant frequencies of the AE and charge induction signals are related to fracture scale.

Key words： rock mechanics fault slip rockburst fault stick-slip acoustic emission charge induction time- frequency characteristics

引用本文:

赵扬锋1，丁玲1，潘一山1，2，刘玉春1，3，龚政1. 不同倾角断层滑移型岩爆黏滑过程声电响应特征研究[J]. 岩石力学与工程学报, 2025, 44(4): 781-796.
ZHAO Yangfeng1，DING Ling1，PAN Yishan1，2，LIU Yuchun1，3，GONG Zheng1. Study on the characteristics of AE and charge induction signal during different dip angles fault stick-slip process with fault slip rockburst. , 2025, 44(4): 781-796.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.3724/1000-6915.jrme.2024.0428 或 https://rockmech.whrsm.ac.cn/CN/Y2025/V44/I4/781

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[19]	TSUTSUMI A，SHIRAI N，Electromagnetic signals associated with stick-slip of quartz-free rocks[J]. Tectonophysics，2008，450(1)：79-84.
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[24]	赵扬锋，刘力强，潘一山. 单轴压缩下含断层带花岗岩声发射、微震和电荷感应实验[J]. 地震地质，2017，39(5)：964-980.(ZHAO Yangfeng，LIU Liqiang，PAN Yishan. Experimental study on acoustic emission，microseism and charge inductionduring fracture process of granite withfaultzoneunder uniaxial compression[J]. Seismology and Geology，2017，39(5)：964-980.(in Chinese))
[25]	赵扬锋，荆刚，樊艺，等. 断层黏滑失稳过程微震与电荷信号时频特征研究[J]. 岩石力学与工程学报，2020，39(7)：1 385-1 395. (ZHAO Yangfeng，JING Gang，FAN Yi，et al. Experimental study on the microseism and charge signal time-frequency characteristics in the process of fault stick-slip instability[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(7)：1 385-1 395.(in Chinese))
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[27]	赵扬锋，丁玲，王学滨，等. 断层黏滑失稳过程声-电信号响应特征研究[J]. 岩土力学，2024，45(4)：973-990.(ZHAO Yangfeng，DING Ling，WANG Xuebin，et al. Acoustic emission and charge signal response characteristics in the process of fault stick-slip instability[J]. Rock and Soil Mechanics，2024，45(4)：973-990.(in Chinese))
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