本文選題：多臺階　切入點：爆破振動　出處：《礦業(yè)研究與開發(fā)》2017年05期

【摘要】：對露天礦多臺階爆破震動信號進行小波包分解,分析表明,爆破振動能量集中于高低兩個頻段,當爆心距與高程不斷增大時,爆破振動能量向低頻段集中;當頻率小于125Hz時,在同一水平的坡頂與坡腳處,坡頂處高頻能量所占比例較大,當頻率大于125Hz時,坡腳處爆破振動能量所占比例明顯高于坡頂處;坡頂處頻率大于125 Hz的高頻能量所占比例較小,隨著高程與爆心距的增大,其值變化幅度不大,維持在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%.
【作者單位】： 華北理工大學河北省礦業(yè)開發(fā)與安全技術重點實驗室;
【基金】：河北省自然科學基金項目(E2016209388)
【分類號】：TD235.1
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本文編號：1709822