基于小波包能量谱的多台阶地形爆破振动信号能量分布分析

发布时间：2018-04-04 11:45

  本文选题：多台阶　切入点：爆破振动　出处：《矿业研究与开发》2017年05期

【摘要】：对露天矿多台阶爆破震动信号进行小波包分解,分析表明,爆破振动能量集中于高低两个频段,当爆心距与高程不断增大时,爆破振动能量向低频段集中;当频率小于125Hz时,在同一水平的坡顶与坡脚处,坡顶处高频能量所占比例较大,当频率大于125Hz时,坡脚处爆破振动能量所占比例明显高于坡顶处;坡顶处频率大于125 Hz的高频能量所占比例较小,随着高程与爆心距的增大,其值变化幅度不大,维持在13%左右。
[Abstract]:The wavelet packet decomposition of the vibration signal of multi-step blasting in opencast mine shows that the blasting vibration energy is concentrated in the high and low frequency bands, and when the distance and height of the blasting center increase, the blasting vibration energy is concentrated in the low frequency band, and when the frequency is less than 125Hz, the blasting vibration energy is concentrated in the low frequency band when the blasting vibration energy is less than 125Hz.At the same level of slope top and slope foot, the proportion of high frequency energy at slope top is large. When the frequency is greater than 125Hz, the proportion of blasting vibration energy at slope foot is obviously higher than that at slope top, and the proportion of high frequency energy at slope top is smaller when the frequency of slope top is more than 125Hz.With the increase of height and blasting center distance, the range of change is not obvious, which is maintained at about 13%.
【作者单位】： 华北理工大学河北省矿业开发与安全技术重点实验室;
【基金】：河北省自然科学基金项目(E2016209388)
【分类号】：TD235.1
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本文编号：1709822