In practical engineering blast

the water decoupling hole is very common. The decoupling coefficient is one of the key factors influencing explosion effects

and its different values will induce different propagation mechanisms of stress-waves and variable destructive ranges in the surrounding mediums. Previous studies mainly focus on analytical solutions and model tests. This paper uses the large-scale nonlinear dynamic analysis software

LS-DYNA

and with famous concrete damage constitutive model Johnson-Holmquist-Concrete to numerically simulate the wave-induced damage properties of concrete by adopting different radial decoupling coefficients Kd for water decoupling blast in infinite concrete medium. The relationships between the damage distribution zones around blasting hole and the pressure

acceleration

velocity of point on hole-wall with the different values of Kd are analyzed. The results obtained in this paper may be useful in engineering blast.