Spectral characteristics of AE in the process of saturated granite fracture under uniaxial compression

ZHANG Yan-bo; LIANG Peng; SUN Lin; TIAN Bao-zhu; YAO Xu-long; LIU Xiang-xin

doi:10.16285/j.rsm.2018.0584

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Spectral characteristics of AE in the process of saturated granite fracture under uniaxial compression

更新时间：2026-06-25

- Spectral characteristics of AE in the process of saturated granite fracture under uniaxial compression
- Vol. 40, Issue 7, Pages: 2497-2506(2019)
- 作者机构：
  
  1. 华北理工大学矿业工程学院,河北,唐山,063210
  2. 华北理工大学河北省矿业开发与安全技术重点实验室,河北,唐山,063210
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2018.0584
  CLC： TU45
- Online First：06 July 2019，
  
  Published：2019
- 稿件说明：
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ZHANG Yan-bo, LIANG Peng, SUN Lin, et al. Spectral characteristics of AE in the process of saturated granite fracture under uniaxial compression[J]. 2019, 40(7): 2497-2506.
DOI：

ZHANG Yan-bo, LIANG Peng, SUN Lin, et al. Spectral characteristics of AE in the process of saturated granite fracture under uniaxial compression[J]. 2019, 40(7): 2497-2506. DOI： 10.16285/j.rsm.2018.0584.

摘要

通过开展饱水花岗岩单轴压缩声发射试验，采用快速傅里叶变换提取声发射信号主频及次主频，进一步提出了综合表征声发射信号频谱特征的参数：主频比F，即主频与次主频的比值，研究岩石破裂过程声发射频谱特征。研究结果表明：饱水花岗岩破裂过程声发射主频、次主频频带数量呈现“3→6→3”先增大后减小的规律，与主频分布特征相比，次主频低频区间占比减小，中、高频区间占比增大，次主频总体平均值比主频高约5 kHz。声发射主频比F分布区间在弹性阶段达到最大：0

Abstract

In this study

acoustic emission (AE) experiments were carried out on saturated granite under uniaxial compression. Fast Fourier transform (FFT) was used to extract the spectrum parameters of AE signals such as dominant-frequency and secondary dominant-frequency. Furthermore

the ratio of the dominant-frequency to secondary dominant-frequency (F) was proposed to characterize the spectral characteristics of the AE signal and study the characteristics of AE spectrum in rock fracture process. The results show that the numbers of the dominant-frequency and secondary dominant-frequency bands of AE increase first and then decrease in the rupture process of saturated granite. Compared with the characteristics of the dominant-frequency distribution

the proportion of the low-frequency interval of the secondary dominant-frequency reduces

and the proportion of the middle and high-frequency interval increases. In addition

the total average value of the secondary dominant-frequency is about 5 kHz higher than that of the dominant-frequency. The distribution range of the dominant-frequency ratio (F) reaches the maximum at the elastic stage: 0

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