摘要
从压电效应机制出发,研究岩体在应力波作用下电磁辐射的传播规律。研究结果表明,岩体中电磁辐射随岩体的初始损伤增大而减小,随传播距离发生衰减,在应力波源处信号最强;随压电系数以及岩体的波阻抗增大而增大;随电阻率增大而增大,相对其它4个参数而言,其影响幅值较小。研究结果与现有的室内实验及现场观测结果相吻合。
From the point of view of piezoelectric effect,the propagation law of electromagnetic emission（EME） in the rock under stress wave was investigated.The results showed that with the increase of rock＇s initial damage the intensity of EME in rock dropped,the EME attenuated with propagation distance,the EME signal at the site of stress wave generation was the most strong,the EME in rock enhanced with the increase of piezoelectric coefficients,wave impedance and resistivity.Relatively speaking,the effect of resistivity on the EME was the least.The research results are in good agreement with ones obtained in laboratory experiments and field measurements.
出处
《矿业研究与开发》
CAS
北大核心
2011年第1期23-25,52,共4页
Mining Research and Development
基金
广东省2009年高校优秀青年创新人才培育项目(310B03)
关键词
应力波
电磁辐射
压电效应
衰减趋势
Stress wave
EME
Piezoelectric effect
Attenuation trend
