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金属矿山 ›› 2014, Vol. 43 ›› Issue (06): 10-15.

• 采矿工程 • 上一篇    下一篇

微差爆破试验及爆破振动能量的小波包分析

何理1,3,钟冬望1,3,刘建2,3,朱2,3,黄小武2,3   

  1. 1.武汉科技大学资源与环境工程学院,湖北 武汉 430081; 2.武汉科技大学理学院,湖北 武汉 430065;3.冶金工业过程系统科学湖北省重点实验室,湖北 武汉 430065
  • 出版日期:2014-06-16 发布日期:2015-01-07
  • 基金资助:

    * 国家自然科学基金项目(编号:50774056,51174147),湖北省自然科学基金项目(编号:2012FFA135)。

Millisecond Blasting Tests and Wavelet Packet Analysis of Blasting Vibration Energy

He Li1,3,Zhong Dongwang1,3,Liu Jiancheng2,3,Zhu Kuan2,3,Huang Xiaowu2,3   

  1. 1.College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;2.College of Science,Wuhan University of Science and Technology,Wuhan 430065,China; 3.Hubei Province Key Laboratory of Systems Science in Metallurgical Process,Wuhan University of Science and Technology,Wuhan 430065,China
  • Online:2014-06-16 Published:2015-01-07

摘要: 为从能量分布角度研究爆破振动信号以控制爆破地震危害,结合室内混凝土边坡相似微差爆破模拟试验,利用MATLAB 7.0,结合小波包技术,研究了振动信号能量和峰值速度随距离的变化规律,分析了减震沟对振动信号能量与峰值速度的削弱程度,以及对振动信号能量分布的影响。总结得出:减震沟使得爆破振动信号能量卓越频带向低频带集中;一定范围内,随传播距离的增加,爆破振动信号峰值振动速度与总能量衰减趋势逐渐变缓;峰值振动速度大的爆破振动信号携带能量不一定大,能量不仅仅是振动速度的表征。

关键词: 微差爆破, 小波包分析, 边坡, 减震沟, 延期时间

Abstract: To study blasting vibration signal from the features of energy distribution to control the blasting vibration hazard,and combined with the experiment of millisecond blasting simulation by indoor concrete slope,the variation law of the vibration signals energy and the peak velocity with the distance is studied with MATLAB 7.0 and the wavelet pocket technique.The weakening degree of vibration signals energy and peak velocity by damping ditch,and as well as its effect on the distribution of the energy are analyzed.The conclusion is that damping ditch makes the predominant frequency of blasting vibration signal energy concentrate on the low frequency band.Within certain limits,the decrease trend of peak vibration speed and total energy of blasting vibration signals gradually becomes weaker with the increase of the propagation distance.The blasting vibration signals with large peak vibration velocity may not necessarily carry large energy,and the energy is not just the character of vibration velocity.

Key words: Millisecond blasting, Wavelet packet analysis, Slope, Damping ditch, Delay time