单轴压缩下饱水花岗岩破裂过程声发射
频谱特征试验研究

doi:10.16285/j.rsm.2018.0584

岩土力学 ›› 2019, Vol. 40 ›› Issue (7): 2497-2506.doi: 10.16285/j.rsm.2018.0584

单轴压缩下饱水花岗岩破裂过程声发射频谱特征试验研究

张艳博^{1, 2}，梁鹏^{1, 2}，孙林^{1, 2}，田宝柱^{1, 2}，姚旭龙^{1, 2}，刘祥鑫^{1, 2}

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

收稿日期:2018-04-09 出版日期:2019-07-11 发布日期:2019-07-06
通讯作者: 梁鹏，男，1987年生，硕士，讲师，主要从事岩石破裂声发射监测、遥感-岩石力学方面的研究工作。E-mail: hnlp87@163.com E-mail: fzdn44444@163.com
作者简介:张艳博，男，1973年生，博士，教授，主要从事采矿工程与岩土工程方面的研究工作。
基金资助:
国家自然科学基金项目(No. 51574102，No. 51774138)；河北省自然科学基金项目(No. E2017209241)；河北省教育厅高校百名优秀创新人才支持计划(No. SLRC2017050)。

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

ZHANG Yan-bo^{1, 2}, LIANG Peng^{1, 2}, SUN Lin^{1, 2}, TIAN Bao-zhu^{1, 2}, YAO Xu-long^{1 ,2}, LIU Xiang-xin^{1, 2}

1. School of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei 063210, China; 2. Key Laboratory of Mining and Safety Technology of Hebei Province, North China University of Science and Technology, Tangshan, Hebei 063210, China

Received:2018-04-09 Online:2019-07-11 Published:2019-07-06
Supported by:
This work was supported by the National Natural Science Foundation of China (51574102, 51774138), the Natural Science Foundation of Hebei Province (E2017209241) and the Supporting Plan for 100 Excellent Innovative Talents in Colleges and Universities of Hebei Education Department(SLRC2017050).

摘要/Abstract

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

关键词: 岩石力学, 声发射, 频谱特征, 主频, 次主频

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

Key words: rock mechanic, AE, spectral characteristics, dominant-frequency, secondary dominant-frequency

中图分类号:

TU 45

张艳博, 梁鹏, 孙林, 田宝柱, 姚旭龙, 刘祥鑫, . 单轴压缩下饱水花岗岩破裂过程声发射频谱特征试验研究[J]. 岩土力学, 2019, 40(7): 2497-2506.

ZHANG Yan-bo, LIANG Peng, SUN Lin, TIAN Bao-zhu, YAO Xu-long, LIU Xiang-xin, . Spectral characteristics of AE in the process of saturated granite fracture under uniaxial compression[J]. Rock and Soil Mechanics, 2019, 40(7): 2497-2506.

参考文献

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单轴压缩下饱水花岗岩破裂过程声发射频谱特征试验研究

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

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单轴压缩下饱水花岗岩破裂过程声发射 频谱特征试验研究

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

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单轴压缩下饱水花岗岩破裂过程声发射频谱特征试验研究