摘要
爆破振动监测与分析是研究爆破振动危害控制的基础和前提。以煤矿岩巷掘进爆破为工程背景,通过现场测试研究了爆破振动对周边围岩及附近既有巷道结构的影响。根据小波包及其能量谱分析基本理论,对爆破振动信号进行小波包分解,得到了信号能量在不同频带范围内的分布特征。结果表明:能量在频域上的分布范围广泛但极不均匀。爆破振动的优势能量,主要分布于主振频率所在的频段。微差爆破振动信号的频带能量分布存在多个峰值。
The blasting vibration monitoring and analysis are the foundation of studying the control of blasting vibration damage. Taking driving blasting in coal mine rock roadway as engineering background, the impacts of blasting vibration on surrounding rock and existing roadway structure are studied through field test. According to the basic theories of wavelet packet and energy spectrum analysis,wavelet packet method is used to decompose blasting vibration signals and to draw energy distribution features in different frequency bands. The results show that：The distribution of signal energy in domain frequency is wide, but not uniform. The dominant energy of blasting vibration is mainly distributed in the frequency band where main vibration frequency is. There are several peak values in the frequency band energy of millisecond blasting vibration signals.
出处
《中国矿业》
北大核心
2013年第6期110-113,120,共5页
China Mining Magazine
关键词
爆破工程
岩巷
振动监测
小波包
能量谱
blasting engineering
rock roadway
vibration monitoring
wavelet packet
energy spectrum
