城区隧道电子雷管起爆错相减震机理分析

PDF(1261 KB)

振动与冲击 ›› 2012, Vol. 31 ›› Issue (21) : 108-111.

论文

城区隧道电子雷管起爆错相减震机理分析

田振农孟祥栋2 王国欣3

作者信息 +

The Mechanism Analysis of Fault-Phase Reducing Vibration on Tunnel Blasting Initiated by Electronic Detonator in City Area

Tian Zhen-nong1 Meng Xiang-dong2 Wang Guo-xin3

Author information +

文章历史 +

摘要

降低爆破振动是城市隧道爆破的关键技术问题，采用时-频分析方法对隧道爆破振动的一般特征进行了分析，结果表明：爆破地震波是多列爆炸波叠加的结果，采用毫秒延期电雷管起爆时，由于雷管段数的限制，起爆网络经常被分成几个时段，对爆炸波的叠加方式缺乏控制，往往出现若干个振速峰值。通过工程试验，研究了采用电子雷管起爆时的减震效果，结果显示采用电子雷管起爆时，如果技术措施合理，能使爆破振动速度峰值显著降低。根据电子雷管起爆延时精度高的特点，并借鉴干扰减震的思想，提出并讨论了错相减震机理。实际城市隧道爆破工程应用反映了错相减震爆破设计达到了理想的减震效果。

Abstract

Reducing vibration is a key problem for tunnel blasting in city area. In this paper, time-frequency analysis was performed to analyze general features of tunnel blasting vibration. The results showed: the blasting seismic wave was formed with multi-series blast wave superposition; the initiation network was often divided into several sessions at millisecond delay blasting due to limiting of the detonator number, and the superposition manners of blast wave were lacked of control, so the waveform always appeared several peak particle velocity. The vibration mitigation effect was studied by engineering experiment when initiation with electronic detonator. And if the reasonable Technical measures are employed, so the blasting vibration can be decreased significantly. Moreover, the mechanism of fault-phase reducing vibration was proposed and discussed by means of delay precision of electronic detonator and by using thought of blasting vibration reduction which induced by waveform interference for reference. The application result of tunnel blasting engineering in urban area showed that the blasting design with fault-phase reducing vibration could make the blasting vibration blasting vibration further decrease.

导出引用

田振农孟祥栋王国欣. 城区隧道电子雷管起爆错相减震机理分析[J]. 振动与冲击, 2012, 31(21): 108-111

Tian Zhen-nong Meng Xiang-dong Wang Guo-xin. The Mechanism Analysis of Fault-Phase Reducing Vibration on Tunnel Blasting Initiated by Electronic Detonator in City Area[J]. Journal of Vibration and Shock, 2012, 31(21): 108-111