Abstract:
This study investigates the hydrodynamic and structural response of rock-embedded tunnels subjected to various explosive loads, using finite element simulations performed via AUTODYN. Emphasizing the fluid-like propagation of shock waves in rock media, the paper develops and validates numerical models to estimate displacements and stresses in tunnels under high detonation pressures. The hydrodynamic approach combines nonlinear material models (e.g., RHT, Johnson-Holmquist) with parametric geometry and explosive conditions to generate predictive equations. These expressions are derived from a regression analysis of 3D simulations and enable practical design decisions in early-stage tunnel engineering under dynamic loading conditions.
