Numerical simulation for cavity formation process by progressive large diameter empty hole spiral cut blasting

摘要

By aid of ANSYS/LS-DYNA 3D nonlinear dynamic finite element software, process of cavity formation by progressive large diameter empty hole spiral cut blasting is simulated, obtained the intuitional graphics of the change of cavity during the explosive volume expansion process. It turns out that the blasting wave delivers in the form of cylinder wave, and the empty hole plays as a free surface. Meanwhile, theoretical rationality of cavity formation by progressive large diameter empty hole spiral cut blasting is verified. The cavity formation process by cut blasting is visualized in the numerical simulation. Result of the study indicates that the cut blasting result can be predicted and the design of blasting technical parameters be optimized.