地应力场下岩体爆体的数值模拟

建立了地应力作用下岩体在爆炸荷载作用下的运动微分方程，并对岩体中的地应力采用隐式分析方法，对爆炸的高速动载作用采用显式分析方法，通过隐式－显式连续求解完成地应力作用下岩体爆炸的数值模拟。数值算例结果表明，近爆腔处，较低的静应力场与较高的动应力场作用时爆炸动态应力波占主导地位，初始应力对爆破应力波影响较小。在远离爆腔处，高地应力存在改变了爆破应力波的传播规律，对爆炸岩体有很大影响。

Numerical simulation of explosion in rock mass under ground stress field

The differential equation of explosion loading in rock mass under ground stress field is established.The implicit method is adopted for the ground stress simulation of rock mass and the explicit method is adopted for the explosion loading simulation,which is completed through the implicit-to-explicit sequential solution.Numerical examples show that the shock wave plays the dominant role when the ground stress is lower much than the explosion loading near the charge chamber;and the higher ground stress can change the regulation of the wave spread.