爆炸荷载作用下卸荷孔效应理论分析与数值模拟

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。

Theoretical analysis and numerical simulation of effect of unloading hole under explosive loading

The sap engineerings have important function in war; at the same time,it is ease to be struck by cannonballs. In order to increase the protection capability of the sap engineerings, the basic theories and energy dissipation of wave are used for analytical research on rock deformation, energy dissipation during the process of rock friction and the propagation characteristics of explosive stress wave which passes through the interface between rock and air. Based on six conditions of normal working environment ,the numerical simulation results for the inspection nodes are simulated by finite element analysis software ANSYS-LS-DYNA . Comparisons with the theoretical analysis show that the unloading hole plays its role of reducing explosive loading. So that a new way for the protection design of sap engineerings is offered.