基于小波包能量谱爆炸参量对爆破振动信号能量分布的影响
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摘要
基于现场实测爆破振动数据,根据爆破振动信号具有短时非平稳的特点,采用小波包分析技术对不同爆炸参量(爆心距、最大段药量和微差雷管段数)下产生的爆破振动信号进行小波包能量谱分析,获得了爆破振动信号不同频带的能量分布,研究了不同爆炸参量下的爆破振动信号能量分布特征,从爆破振动信号能量角度探讨了不同爆炸参量下爆破地震波的衰减规律,为研究爆破地震效应提供了一种新的分析技术。
According to the characteristics of short-time,non-stationary random signals,the wavelet packet energy spectra for the measured blasting vibration signals were investigated by using the wavelet packet analysis.These blasting vibration signals were produced in case of the different explosion parameters such as the distance of the measuring point from the blasting center,the maximum sectional explosive mass and the millisecond-delay detonator number.The energy distributions at the different frequency bands for the blasting vibration signals were obtained.The energy distribution characteristics of the blasting vibration signals measured under the different explosion parameters were analyzed.Considering the blasting vibration signal energy,the attenuation laws of the blasting seismic waves corresponding to the different explosion parameters were explored.Our results indicate that the wavelet packet analysis method is effective to study blasting seismic effects.
According to the characteristics of short-time,non-stationary random signals,the wavelet packet energy spectra for the measured blasting vibration signals were investigated by using the wavelet packet analysis.These blasting vibration signals were produced in case of the different explosion parameters such as the distance of the measuring point from the blasting center,the maximum sectional explosive mass and the millisecond-delay detonator number.The energy distributions at the different frequency bands for the blasting vibration signals were obtained.The energy distribution characteristics of the blasting vibration signals measured under the different explosion parameters were analyzed.Considering the blasting vibration signal energy,the attenuation laws of the blasting seismic waves corresponding to the different explosion parameters were explored.Our results indicate that the wavelet packet analysis method is effective to study blasting seismic effects.
引文
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[5]中国生,徐国元,赵建平.基于小波变换的爆破地震信号阈值去噪的应用研究[J].岩土工程学报,2005,27(9):1055-1059.ZHONG Guo-sheng,XU Guo-yuan,ZHAOJian-ping.Study and application of threshold de-noisingin seismic sig-nals of blasting based on wavelet transform[J].Chinese Journal of Geotechnical Engineering,2005,27(9):1055-1059.
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[7]中国生.基于小波变换爆破振动的应用基础研究[D].长沙:中南大学,2006.
[8]Mallat S.Atheory for multiresolution signal decomposition:The wavelet represention[J].IEEE Transactions Pat-tern Anal Machine Intell,1989,11(7):674-693.
[9]Daubechies I.The wavelet transformti me-frequency localization and signal analysis[J].IEEE Transactions on In-formation Theory,1990,36(5):961-1005.
[10]Charles K.Anintroduction to wavelets[M].New York:Academic Press,1992.
[11]邹云屏,李潇.信号变换与处理[M].武汉:华中理工大学出版社,1993.
[12]周德廉,邵国友.现代测试技术与信号分析[M].徐州:中国矿业大学出版社,2005.
[13]胡昌华,张军波,夏军,等.基于MATLAB的系统分析与设计-小波分析[M].西安:西安电子科技大学出版社,1999.
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