某地下铁矿大直径下向深孔爆破振动研究
Research on Vibration of Large Diameter Down Deep Hole Blasting in an Underground Iron Mine
杨翎 1杨赛群1
作者信息
摘要
为研究某地下矿山大直径下向深孔爆破振动对周边环境的影响,通过控制-220 m水平605矿房一次爆破总药量,获得不同特征的爆破振动信号,结合MATLAB中小波包分析方法,对不同起爆药量下,爆破振动信号的各频带质点峰值速度(PPV)、总能量、各频带能量的分布特征及衰减规律进行研究.结果表明:地下大直径下向深孔爆破的PPV和振动总能量与一次爆破总药量呈线性关系,且质点峰值速度在2频带时达到最大值,一次爆破总药量对于2频带的影响最为显著;随着一次爆破振动能量的增加,爆破振动能量向较高频带集中,但其频率仍保持在125 Hz以内.因此在进行大直径下向深孔爆破时,需要考虑PPV和爆破振动能量在各个频带上的分布规律,确定一次爆破总药量,减少对周边民房及厂区建筑物的影响,为后续研究提供了一定的参考价值.
Abstract
In order to study the influence of large-diameter downward deep-hole blasting vibration on the surrounding environment,blasting vibration signals with different characteristics are obtained by control-ling the total charge of a blasting at-220 m level in the 605 mine.With the wavelet packet analysis,the dis-tribution characteristics and attenuation rules of particle peak velocity(PPV),total energy and energy in each frequency band of blasting vibration signal under different amount of blasting charge are studied.The results show that there is a linear relationship between PPV and total vibration energy of underground large-diameter downhole blasting and the total charge of a single blasting,and the peak particle velocity reaches the maximum value in the 2 frequency band,and the influence of the total charge of a single blasting on the 2 frequency band is most significant.With the increase of the blasting vibration energy,the blasting vibra-tion energy is concentrated in a higher frequency band,but its frequency remains within 125 Hz.Therefore,when carrying out large-diameter downward deep hole blasting,the distribution law of PPV and blasting vi-bration energy in each frequency band should be considered to determine the total charge amount of a blast-ing and reduce the impact on the surrounding civilian houses and factory buildings,which provides a certain reference price for the follow-up study.
关键词
爆破振动/地下矿山/小波包分析/振动能量/质点峰值速度Key words
blasting vibration/underground mine/wavelet packet analysis/vibration energy/peak par-ticle velocity引用本文复制引用
出版年
2025
NETL
NSTL
万方数据