Determination on Standing Blasting Effective Scope of High Gassy and Low Permeability Seam

The ANSYS/LS-DYNA software was applied to the computer numerical simulation on the standing blasting effective scope.The blasting numerical calcula tion models with the blasting borehole spacing of 5, 6 and 7 m were individually established.The analysis on the simulation results showed that the blasting stress wave would be spread to all around based on the blasting source as the center.The stress wave strength would be steadily reduced with the spreading distance increased.Du ring the stress wave spreading process, the stress superposition phenomenon would be occurred.The longer of the blasting borehole spacing, the lower of the attenuati on range would be stress strength after the superposition during the spreading process.With the numerical simulation and the site inspection, when the blasting borehol e spacing was 6 m, the blasting effect would be best.