摘要

In order to solve the problem of water in boreholes which influences the blasting effect in open pit deep hole bench blasting, an isolator was designed for separating the mixed emulsion explosive (MEE) from rock debris, based on the principle of fluid dynamics. The finite element software ANSYS/LS-DYNA was applied to simulate the posture adjustment of the isolator in the process of falling. The result showed that the designed isolator could meet the purpose of separating MEE from rock debris. Simulation experiments in dry and wet borehole models with and without isolator were performed, and the results showed that the isolator can avoid the explosive misfire caused by mixing of MEE and rock debris, increase the utilization rate of MEE, improve the blasting effect, and meet the purpose of lowering the blasting cost.