Abstract: In order to solve the over limit of gas in the upper corner, using directional drilling technology which has the characteristics of controllable track, wide coverage area and so on, gas extraction is carried out by roof high position directional drilling in goaf. The roof failure law of E5302 face in Sihe Mine is numerically simulated, and the relationship between tension and failure height at different locations in the 75 m range from the return air side is obtained. It is determined that the top orientation of the gob area is located at the vertical distance from the roof, and the vertical distance is 30 m to 45 m. In the field test, the gas concentration in the upper corner is controlled around 0.4% during the recovery period, which ensures the safety during the recovery period.