In this paper, the best interval time of waveforms interference for vibration reduction in tunnel excavation blasting is studied theoretically and experimentally. Think that when the delay time between holes is 5~8ms, can make the vibration waveform superposition and reach the vibration reducing effect. Through the field practice shows that, when the cutting holes delay between 5ms and the remaining holes delay between 8ms, can achieve the desired blasting and reducing vibration effect. The paper laid a theoretical base for the control of blasting vibration in millisecond blasting engineering.%本文通过理论分析和试验研究,确定了隧道爆破开挖干扰降振的最佳间隔时差.认为当孔间延时为5~8ms时,可以使振动波峰错相叠加,达到平峰降振的作用.通过现场实践证明,当掏槽孔间延时5ms,其余孔间延时8ms时,可以达到理想的爆破和减振效果.为以后工程中应用毫秒延时爆破控制振动,提供了理论依据.
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