不同爆源形式的爆破地震能量分布特征
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摘要
爆破地震对建筑物的影响实质上是一种能量的传递与转化过程,这种传递与转化的过程受到爆破地震波能量分布特征的影响。利用基于功率谱的爆破地震能量分析方法,借助大量工程实测数据,针对爆源形式对爆破地震能量分布特征的影响进行了分析,分析结果表明:对于4类钻孔爆破诱发的地震,能量随频率分布比较分散,0～10Hz的低频段能量比例非常少;不同爆源形式的爆破地震能量分布特征存在差别,随着孔径、孔深的增大,爆破地震主振能量频带趋于集中,也更倾向低频方向;地下工程爆破地震小于40Hz的能量比例非常小。不同爆源形式爆破地震能量分布特征上的这种差别,对于控制爆破中钻爆方式的选取具有很好的指导意义。
The effect of blast-induced seismic waves on buildings can be considered as a transferred and transformed process of the energy,which relates to the energy distribution characteristic of blasting vibration.An energy analysis method for blasting vibration signals based on power spectrum was put forward.Based on a large number of measurement data,the energy distribution characteristics of seismic waves induced by different forms of blasting resource were studied.The result shows that for blasting vibration induced by four kinds of drilling-and-blasting,the energy distribution with frequency is scattered.The seismic energy of low-frequency from 0 Hz to 10 Hz is very little.The energy distribution characteristics vary with the different types of drilling-and-blasting.As diameter and depth of the blasting hole increases,the frequency band of energy distribution becomes more focus and has the trend of moving to the lower frequency,and for underground blasting,the seismic energy below 40 Hz is very little.The energy distribution characteristic of seismic waves induced by different forms of blasting resource can have guiding role for choosing the appropriate type of drilling-and-blasting when the effect of blasting vibration needs to be controlled.
The effect of blast-induced seismic waves on buildings can be considered as a transferred and transformed process of the energy,which relates to the energy distribution characteristic of blasting vibration.An energy analysis method for blasting vibration signals based on power spectrum was put forward.Based on a large number of measurement data,the energy distribution characteristics of seismic waves induced by different forms of blasting resource were studied.The result shows that for blasting vibration induced by four kinds of drilling-and-blasting,the energy distribution with frequency is scattered.The seismic energy of low-frequency from 0 Hz to 10 Hz is very little.The energy distribution characteristics vary with the different types of drilling-and-blasting.As diameter and depth of the blasting hole increases,the frequency band of energy distribution becomes more focus and has the trend of moving to the lower frequency,and for underground blasting,the seismic energy below 40 Hz is very little.The energy distribution characteristic of seismic waves induced by different forms of blasting resource can have guiding role for choosing the appropriate type of drilling-and-blasting when the effect of blasting vibration needs to be controlled.
引文
[1]Li Hongtao.Study on effect of blast-induced seismic based on energy theory[D].Wuhan:Wuhan University,2007.[李洪涛.基于能量原理的爆破地震效应研究[D].武汉:武汉大学,2007.]
[2]Lou jianwu,Long Yuan,Xu Quanjun.Study one the wavelet analysis applied in structure response to blasting vibration[J].World Information on Earthquake Engineering,2001,17(1):64-68.[娄建武,龙源,徐全军.小波分析在结构爆破振动响应能量分析法中的应用[J].世界地震工程,2001,17(1):64-68.]
[3]Long Yuan,Lou Jianwu,XU Quanjun.Application of wavelet analysis to the energy method of the structure re-sponse caused by explosion vibration[J].Explosive Materi-als,2001,30(3):1-5.[龙源,娄建武,徐全军.小波分析在结构物对爆破振动响应的能量分析法中的应用[J].爆破器材,2001,30(3):1-5.]
[4]Ling Tonghua,Lt Xibin.Laws of energy distribution in dif-ferent frequency bands for blast vibration signals[J].Jour-nal of Central South University of Technology:Natural Sci-ence,2004,35(2):310-315.[凌同华,李夕兵.爆破振动信号不同频带的能量分布规律[J].中南大学学报:自然科学版,2004,35(2):310-315.]
[5]Ling Tonghua,Li Xibin.The features of energy distribution for blast vibration signals in underground engineering by wavelet packet analysis[J].Explosion and Shock Wave,2004,24(1):63-68.[凌同华,李夕兵.地下工程爆破振动信号能量分布特征的小波包分析[J].爆炸与冲击,2004,24(1):63-68.]
[6]Ling Tonghua,Li Xibin.Analysis of energy distributions of millisecond blast vibration signals using the wavelet packet method[J].Chinese Journal of Rock Mechanics and Engi-neering,2005,24(7):1117-1122.[凌同华,李夕兵.多段微差爆破振动信号频带能量分布特征的小波包分析[J].岩石力学与工程学报,2005,24(7):1117-1122.]
[7]Zhong Guosheng,Xu Guoyuan,Xiong Zhengming.Applica-tion research of the energy analysis method for blasting seis-mic signals based on wavelet transform[J].Explosion and Shock Wave,2006,26(3):222-227.[中国生,徐国元,熊正明.基于小波变换的爆破地震信号能量分析法的应用研究[J].爆炸与冲击,2006,26(3):222-227.]
[8]Huang Wenhua,Xu Quanjun,Shen Wei,et al.Application of wavelet transform in evaluation of blasting vibration dam-age[J].Engineering Blasting,2001,7(1):24-27.[黄文华,徐全军,沈蔚,等.小波变换在判断爆破地震危害中的应用[J].工程爆破,2001,7(1):24-27.]
[9]Yang Shengquan.Study on theory and application of blasting vibration cumulative effects[D].Changsha:Central South U-niversity,2002.[阳生权.爆破地震累积效应理论和应用初步研究[D].长沙:中南大学,2002.]
[2]Lou jianwu,Long Yuan,Xu Quanjun.Study one the wavelet analysis applied in structure response to blasting vibration[J].World Information on Earthquake Engineering,2001,17(1):64-68.[娄建武,龙源,徐全军.小波分析在结构爆破振动响应能量分析法中的应用[J].世界地震工程,2001,17(1):64-68.]
[3]Long Yuan,Lou Jianwu,XU Quanjun.Application of wavelet analysis to the energy method of the structure re-sponse caused by explosion vibration[J].Explosive Materi-als,2001,30(3):1-5.[龙源,娄建武,徐全军.小波分析在结构物对爆破振动响应的能量分析法中的应用[J].爆破器材,2001,30(3):1-5.]
[4]Ling Tonghua,Lt Xibin.Laws of energy distribution in dif-ferent frequency bands for blast vibration signals[J].Jour-nal of Central South University of Technology:Natural Sci-ence,2004,35(2):310-315.[凌同华,李夕兵.爆破振动信号不同频带的能量分布规律[J].中南大学学报:自然科学版,2004,35(2):310-315.]
[5]Ling Tonghua,Li Xibin.The features of energy distribution for blast vibration signals in underground engineering by wavelet packet analysis[J].Explosion and Shock Wave,2004,24(1):63-68.[凌同华,李夕兵.地下工程爆破振动信号能量分布特征的小波包分析[J].爆炸与冲击,2004,24(1):63-68.]
[6]Ling Tonghua,Li Xibin.Analysis of energy distributions of millisecond blast vibration signals using the wavelet packet method[J].Chinese Journal of Rock Mechanics and Engi-neering,2005,24(7):1117-1122.[凌同华,李夕兵.多段微差爆破振动信号频带能量分布特征的小波包分析[J].岩石力学与工程学报,2005,24(7):1117-1122.]
[7]Zhong Guosheng,Xu Guoyuan,Xiong Zhengming.Applica-tion research of the energy analysis method for blasting seis-mic signals based on wavelet transform[J].Explosion and Shock Wave,2006,26(3):222-227.[中国生,徐国元,熊正明.基于小波变换的爆破地震信号能量分析法的应用研究[J].爆炸与冲击,2006,26(3):222-227.]
[8]Huang Wenhua,Xu Quanjun,Shen Wei,et al.Application of wavelet transform in evaluation of blasting vibration dam-age[J].Engineering Blasting,2001,7(1):24-27.[黄文华,徐全军,沈蔚,等.小波变换在判断爆破地震危害中的应用[J].工程爆破,2001,7(1):24-27.]
[9]Yang Shengquan.Study on theory and application of blasting vibration cumulative effects[D].Changsha:Central South U-niversity,2002.[阳生权.爆破地震累积效应理论和应用初步研究[D].长沙:中南大学,2002.]
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