摘要
在隧道爆破开挖中,频繁反复的爆破冲击动压力对隧道设计轮廓线、施工误差和围岩的稳定性等有很大影响。依据爆炸动力学理论和弹性波动理论,分析了同时起爆和微差起爆所产生的爆炸应力场。根据爆炸波在传播过程中的叠加机理,提出了爆破后隧道围岩质点振动速度解析解。爆破振动速度解析解的提出,为隧道开挖采用合适的爆破掘进方法、减少施工误差及提高围岩的稳定性提供了理论依据。
The impulsive dynamical pressure from frequent blasting has a strong influence on designed tunnel contour,construction error and stability of surrounding rock in the course of excavating tunnel. According to explosion dynamics and elastic wave theory ,the stress wave fields resulted from simultaneous and millisecond initiation are analyzed. According to the superimposed mechanism of stress wave, the analytic solutions of particle vibration velocity on surround- ing rock are put forward, and the analytic solution of particle vibration velocity is testified by monitoring. The study can provide the references for use of appropriate blasting methods, reduction of construction error and improve of the stability of surrounding rock in tunnel excavation.
出处
《有色金属（矿山部分）》
2007年第3期31-34,共4页
NONFERROUS METALS(Mining Section）
关键词
微差爆破
振动速度
应力波叠加
millisecond blasting
vibration velocity
stress wave superimposition
