CAJ | 학술논문

为了解某矿爆破震动波传播规律，在去噪的基础上对信号进行4层db8小波包分解，提取噪声和频段分信号。分析表明，噪声易与真实信号混叠，使PPV增大或减小，降低原始信号的准确性与可靠性；真实信号在0～256 Hz 均有分布，各频段未见明显集中现象，但在同一爆破中，随着传播距离的增加，速度有向低频集中的趋势。最后，将数据进行线性拟合，获取了爆破震动波的衰减规律公式，为该矿爆破设计提供了依据。
위료해모광폭파진동파전파규률，재거조적기출상대신호진행4층db8소파포분해，제취조성화빈단분신호。분석표명，조성역여진실신호혼첩，사PPV증대혹감소，강저원시신호적준학성여가고성；진실신호재0～256 Hz 균유분포，각빈단미견명현집중현상，단재동일폭파중，수착전파거리적증가，속도유향저빈집중적추세。최후，장수거진행선성의합，획취료폭파진동파적쇠감규률공식，위해광폭파설계제공료의거。
In order to understand blast vibration wave propagation of a mine, noise and signal components of each band are extracted on the basis of signal de-noising after four layers signal decomposition with db8 wavelet packet. Analysis shows that aliasing of real signal and noise will cause PPV increasing or decreasing which can reduce the accuracy and reliability of the original signal. Real signals are distribution within 0~256 Hz with no significant concentration in each frequency band. But, in the same blasting, with the increasing of propagation distance, speed tends to concentrate on low frequency. Finally, attenuation law of blasting vibration wave formula is acquired by linear fitting of data which provides the basis for the mine blasting design.