Abstract: According to the problems that deep mining work face local relief measures emissions hole spacing is not reasonable and it leads to the increase of left blank dynamic disaster risk, referencing the advanced borehole surrounding rock mechanics model and the pore-fracture mixed gas pressure expansion mechanics model, the article analyzes the advance pressure relief discharge hole weakening coal gas expansion energy of elastic properties of outburst mechanism and effective radius drilling test theory, combined with gas occurrence characteristics of 2^# typical soft and low permeability outburst coal seam in Xiayukou Coal Mine, the effective radius of action of advanced borehole pressure relief and discharge based on the test of flow method is carried out, and the swarm optimization for working face local measures hole is carried out too.