Abstract: Protective seam mining is the most effective and the most economic measure for region outburst prevention of outburst mine,especially in the fundamental guarantee for safety production of the outburst mine.After mining lower protective layer,the full desorption gas in a large number of protective layer(a layer or multi-layer) rushes into the gob of the mining protective layer through cracks.Bao’an coal industry completely solved the gas problems in the gob of stope,adjacent layers and the mining-coal seam,and achieved good effectiveness.