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.
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]. , 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. , 2012, 31(21): 108-111.
2012, Vol. 31 
