段药量对爆破振动信号时频特性的影响研究

为研究段药量对爆破振动信号时频特性的影响，进行不同段药量的单孔爆破振动试验。基于实测数据，利用小波分析和ＡＯＫ时频分布相结合的方法，对不同段药量的爆破振动信号在不同频带内展开，并以频带能量比、频带能量持续时间为指标，研究段药量对爆破振动信号时频特性的影响。结果表明，段药量对爆破振动信号时频特性影响很大：随着段药量的增加，爆破振动信号的低频能量所占总能量的比例增加且频带能量的持续时间相应延长。研究成果可揭示段药量对爆破振动信号时频特性的影响，并为从能量的角度进行抗振、降振的研究提供分析基础。

Influence of deck charge on time-frequency characteristics of a blasting vibration signal

In order to study the influence of deck charge on time-frequency characteristics of blasting vibration signals,single-hole blasting tests with different deck charges were conducted.Based on the measured data,using the combined method of wavelet analysis and AOK time-frequency distribution to expand the blasting vibration signals with different deck charge in different frequency band,and using band energy ratio and band energy duration as indexes,the influence of deck charge on time-frequency characteristics of blasting vibration signals was analyzed.The results showed that deck charge has large effects on time-frequency characteristics of blasting vibration signals;with increase in deck charge,the proportion of lower frequency energy in total energy increases and band energy duration extends.The results provided a basis for studying the influence of deck charge on time-frequency characteristics of blasting vibration signals,anti-vibration and vibration reduction.