基于FSWT算法的某露天矿山边坡爆破振动传播规律研究OACSTPCD

In order to master the propagation law of blasting vibration signals of open-pit mine slope under complex conditions,the blasting vibration data measured by Jianshan phosphate mine slope was taken as the research object.The frequency slice wavelet transform(FSWT)and Hilbert-Huang transform(HHT)algorithms were used to analyze the influence of blasting center distance and slope elevation amplification effect on the energy distribution and propagation law of vibration wave.The results showed that when the propagation distance of blasting vibration wave was close,the energy rose and then decreased with time,and the energy distribution was not dense.When the propagation distance of the vibration wave was far,the energy rose slowly and the distribution was relatively concentrated.The vibration energy at the bottom of the slope was mainly concentrated in the high frequency band of 93.75～125 Hz and contained a large amount of high frequency energy,and the vibration energy at the top was mainly concentrated in the low frequency band of 0～46.87 Hz and contained a large amount of low frequency energy.The energy proportion of No.3 machine in 1972 platform in the frequency range of 0～46.87 Hz was 69.45% on average,while those of No.1 and No.2 machines were 51.37% and 42.55% respectively.The former was 18.08 and 26.9 percentage points higher than the latter two respectively.The explosion center distance of No.4 machine was farther than that of No.3 machine,and its low-frequency energy should be greater than that of No.3 machine.However,the average energy proportion of No.3 machine in the frequency range of 0～46.87 Hz was 24.32 percentage points higher than that of No.4 machine.The elevation effect was more obvious than the influence of explosion center distance.The high-frequency energy at the top relative to the bottom showed an elevation attenuation effect,and the low-frequency energy at the top relative to the bottom showed an elevation amplification effect.