岩石高边坡爆破振动传播规律小波包分析
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摘要
为研究爆破荷载作用下岩石高边坡的动力特性,根据岩石边坡开挖爆破振动监测数据,应用小波包理论分析了爆破地震波沿岩石边坡传播过程中的频谱及能量变化规律。得出了爆破地震波沿岩石边坡传播过程中频谱特性、主振频率和能量随距离变化规律、不同频带上的振动速度峰值和能量变化规律。研究成果对进一步研究岩石高边坡的动力稳定性具有重要意义。
On the basis of the vibration monitoring data,the dynamic characteristic of the high rock slope under blasting loads was researched.The wavelet packet theory was applied to analyze the spectrum and energy transformation law of the quake wave caused by blasting spreading along the rock slope.The frequency spectrum feature,main vibration frequency and energy distribution according to the distance,peak particle velocity in different spectrum-band,and energy distribution law in the spreading of the blasting quake wave along the rock slope were concluded.The conclusions are very significant for the further study on the dynamic stability of the high rock slope.
On the basis of the vibration monitoring data,the dynamic characteristic of the high rock slope under blasting loads was researched.The wavelet packet theory was applied to analyze the spectrum and energy transformation law of the quake wave caused by blasting spreading along the rock slope.The frequency spectrum feature,main vibration frequency and energy distribution according to the distance,peak particle velocity in different spectrum-band,and energy distribution law in the spreading of the blasting quake wave along the rock slope were concluded.The conclusions are very significant for the further study on the dynamic stability of the high rock slope.
引文
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[12]徐启明,李如忠.南芬露天铁矿台阶爆破降振措施[J].矿业快报,2004(3):14-16.
[2]Birch W J,Pegden M.Improved prediction of ground vibrations from blasting at quarries[J].Transactions of the Institution of Mining and Metallurgy(Section A):Mining Industry.2000,109:102-106.
[3]林从谋,杨林德,崔积弘.浅埋隧道掘进爆破振动特性研究[J].地下空间与工程学报,2006,2(2):276-279.
[4]林大超,施惠基,白春华,等.爆破震动时频分布的小波包分析[J].工程爆破,2002,8(3):1-6.
[5]王祥秋,杨林德,高文华,等.基于小波分析的隧道衬砌结构动力响应规律研究[J].岩石力学与工程学报,2005,24(10):1746-1750.
[6]林大超,施惠基,白春华,等.基于小波变换的爆破振动时频特征分析[J].岩土工程学报,2004,23(1):101-107.
[7]胡昌华,张军波.基于MATLAB的系统分析与设计[M].西安:西安电子科技大学出版社,1999:40-60.
[8]恽寿榕.爆炸力学计算方法[M].北京:北京理工大学出版社,1995,56-62.
[9]Daubechies I.Orthonormal bases of compactly supported wavelet[J].Communication Pure and Applied Mathematics,1988,41(7):909-996.
[10]何军,于亚伦,梁文基.爆破振动信号的小波分析[J].岩石工程学报,1998,20(1):47-50.
[11]林大超,施惠基,白春华,等.爆炸地震效应的时频分析[J].爆炸与冲击,2003,23(1):31-35.
[12]徐启明,李如忠.南芬露天铁矿台阶爆破降振措施[J].矿业快报,2004(3):14-16.
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