Abstract: In order to ensure the normal and orderly exploitation of coal mine, according to the occurrence of steep and extra thick coal seam and the mining condition, we use the comprehensive treatment technology which includes long bedding borehole drainage and pressure relief interception drainage and roof high level borehole mining and mining drainage pipe etc. The research shows that the pre-pumping rate of working face reached 42.7%, working face gas drainage rate reached more than 80%. The pressure relief gas interception extraction takes on obviously decrease - increase - decrease law, and working face realizes the gas zero over-limit during the recovery period, which ensures the safe production of the mine.