A Study on the Characteristics of Electromagnetic Radiation during Deformation and Failure of Different Materials Under Uniaxial Compression

IF 1 4区工程技术 Q4 ENGINEERING, GEOLOGICAL

Journal of Environmental and Engineering Geophysics Pub Date : 2020-03-01 DOI:10.2113/JEEG19-044

Qifei Wang, Chengwu Li, Beijing Xie, Yuechao Zhao, Dihao Ai

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引用次数: 2

Abstract

The detection of electromagnetic radiation (EMR) during the fracture of solid materials such as rocks and coal has been widely used in seismic exploration and mine dynamic disaster prediction. As described in this paper, we conduct uniaxial compression tests on coal, cement, and glass materials to determine the characteristic EMR differences among materials. A band-stop filter based on the Fourier transform and the wavelet packet transform method are used to conduct signal denoising and analysis. Basic analyses of the pulse-time characteristics, energy distribution, cumulative energy, and waveform characteristics of EMR are conducted. The research results show that there is a strong corresponding relation between the loading time, loading stress and EMR energy. A large number of EMR events are released in rapid succession during the main rupture of coal and cement, while the EMR events are evenly distributed throughout the whole loading process of glass. For the same material, the maximum EMR amplitude increases with an increasing peak value of the stress. The EMR pulse waveform of coal and cement agrees well with predictions based on the theoretical formula of the electromagnetic dipole oscillation EMR generation mechanism. The paper provides further theoretical basis for understanding the mechanism of EMR, with great significance for improving coal mining safety.

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不同材料单轴压缩变形破坏过程中的电磁辐射特性研究

岩石、煤等固体材料断裂过程中的电磁辐射检测在地震勘探和矿山动力灾害预测中有着广泛的应用。如本文所述，我们对煤、水泥和玻璃材料进行了单轴压缩试验，以确定材料之间的特征EMR差异。采用基于傅里叶变换和小波包变换的带阻滤波器对信号进行去噪和分析。对EMR的脉冲时间特性、能量分布、累计能量和波形特性进行了基本分析。研究结果表明，加载时间、加载应力与EMR能量之间存在较强的对应关系。在煤与水泥主破裂过程中，大量EMR事件快速连续释放，而EMR事件在整个玻璃加载过程中分布均匀。对于同一种材料，最大EMR幅值随应力峰值的增大而增大。煤和水泥的EMR脉冲波形与基于电磁偶极子振荡EMR产生机理理论公式的预测吻合较好。本文为进一步认识电磁共振机理提供了理论依据，对提高煤矿安全生产具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Environmental and Engineering Geophysics 地学-地球化学与地球物理

CiteScore

2.70

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： The JEEG (ISSN 1083-1363) is the peer-reviewed journal of the Environmental and Engineering Geophysical Society (EEGS). JEEG welcomes manuscripts on new developments in near-surface geophysics applied to environmental, engineering, and mining issues, as well as novel near-surface geophysics case histories and descriptions of new hardware aimed at the near-surface geophysics community.