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坑道工程在战争中具有十分重要的作用,但又容易遭受炮弹打击。为增加坑道口部的防护能力,利用波的基本理论和耗能原理,分析了波在岩石和空气介质间界面的反射、透射等传播特性、岩石变形及岩体摩擦耗能原理,得出岩石介质中孔洞有利于爆炸荷载的损耗,起到卸荷的作用,并利用有限元分析软件ANSYS—LS-DYNA,对A、B和C 3种不同情况的6种工况进行数值模拟,通过模拟结果与理论分析结果的比对,进一步验证卸荷孔的卸荷效应,为坑道工程防护设计提出了一个新的途径。
Tunneling works have a very important role in the war, but they are also vulnerable to the impact of artillery shells. In order to increase the protective ability at the mouth of the tunnel, the wave propagation and transmission characteristics at the interface between rock and air were analyzed by using the basic wave theory and energy dissipation principle. The rock deformation and rock friction energy dissipation principle were analyzed. The holes in the medium are conducive to the detonation load and play the role of unloading. Six kinds of conditions of A, B and C are simulated by finite element analysis software ANSYS-LS-DYNA. Through simulation The result is compared with the theoretical analysis to further verify the relief effect of the unloading hole, which provides a new way for the protection design of tunnel engineering.