摘要
爆破地震波的传播过程受到多种因素的影响,以爆破地震波产生的能量条件为基础,推导了地震波衰减规律与其频谱的理论关系。通过小波包分析的方法,对某露天煤矿实测爆破地震波进行多层分解和重构,分析不同频段地震波的衰减规律。结果表明:爆破地震波能量的衰减与振动频率成正比,地震波在传播过程中低频带能量占总能量的比率随传播距离的增加呈上升趋势。
The propagation of blasting seismic wave is influenced by many factors, and the theoretical relationship between seismic wave attenuation and frequency spectrum is derived based on the energy condition of blasting seismic wave. Based on wavelet packet analysis method, the seismic waves in a surface coal mine are decomposed and reconstructed, and the attenuation laws of seismic waves in different frequency bands is analyzed. The results show that the attenuation of blasting seismic wave is proportional to the vibration frequency, and the ratio of low frequency band energy to total energy increases with the increase of propagation distance.
出处
《煤矿安全》
CAS
北大核心
2017年第2期76-78,82,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(51204096)
河南省高校科技创新团队支持计划资助项目(14IRTSTHN029)
河南省高校科技创新人才支持计划资助项目(17HASTIT033)
关键词
爆破震动
地震波
衰减规律
小波包
频谱
露天煤矿
blasting vibration
seismic wave
attenuation rule
wavelet packet
frequency spectrum
surface coal mine
