A technique for simulating the process of structures collapse under demolition blast was developed in the frame of ABAQUS finite element software. The choice methods of the height of cut

the mechanical criterion and the discretization of structures were put forward for demolition blast. The instability and collapse of structures were simulated using the nonlinear transient explicit dynamics module of ABAQUS. The technique described in this paper has been used to simulate the process of a practical demolition blast. The results of simulation show that the process of structure collapse and the shape of muck pile from simulation are similar to the practical one.