Blasting Technique for Coal Face Crossing Fault

Based on Yanmazhuang 27131 coal face, we research the drilling blasting technology for coal face acrossing the fault. We use LS-DYNA simulation software to simulate the failure process of rock blasting in hole, use Von Mises yield criterion to analyze rock in different locations around the state of drilling. It is concluded that rock blasting cavity formed within a radius of 0.1 m radial range; radial radius of 0.1 to 0.3 m for the blast fractured zone; rock radial range of 0.3 to 0.5 m performance of larger pieces of the destroyed area. Finally, according to the site engineering experience, we develop a layout program of blasting drilling for crossing fault, which is verified by field observations.