用动光弹方法研究隧道岩爆的爆破扰动机理  

On blasting perturbation mechanism of rock burst in tunnel by dynamic photo-elasticity

作　　者：黄锋[1] 徐则民[2] 

机构地区：[1]同济大学地下建筑与工程系岩土及地下工程教育部重点实验室,上海200092 [2]昆明理工大学土木工程系,云南昆明650224

出　　处：《爆炸与冲击》2009年第6期632-636,共5页Explosion and Shock Waves

基　　金：国家自然科学基金项目(40272119)

摘　　要：利用动态光弹性方法,以Lamb模型为依据,研究了不同荷载形式下,模型内应力波的传播、相互作用规律以及刻槽的拦截效应。实验结果与弹性动力学解答基本一致:(1)倾斜冲击荷载作用下,模型内传播的有P波、S波和Rayleigh波,其中P波和Rayleigh波对岩爆有突出贡献;(2)等差条纹图的分布规律,可以合理解释岩爆高发区段与开挖面的位置关系;(3)模型表面的刻槽,可以实现对Rayleigh波的大量拦截,说明隧道表面切槽的岩爆控制方法理论上是可行的。The model was simulated by photo-elastic experiments according to the Lamb model, which included the propagation, interaction laws and interception effects of slot obstacle. The experimental results accord with the kinetics mostly： （1） There are P, S and Rayleigh waves under the action of oblique impact load. Only P and Rayleigh waves contribute to rock burst. （2） From the fringe patterns, the effects of inducing fracture and laws of propagation about pressure and Rayleigh are impor- tant factors for rock-burst mechanism, which can explain the space relationship between rock burst and face. （3） The slot on the model surface can effectively intercept stress waves, especially Rayleigh waves. So the method for controlling rock-burst is theoretically feasible.

关 键 词：爆炸力学 爆破扰动机理 动光弹 岩爆 Lamb模型 

分 类 号：O389[理学—流体力学]