Abstract: Aiming at the characteristics that the overlying thick oil shale near coal seam group gas escape is difficult, coal seam spacing is close, the coal seam gas pressure and content is large, there is the possibility of coal and gas outburst danger, the first coal seam gas emission is large, taking Yilan Mining Area as an example, the general idea of gas control is adopted to determine the mining sequence of coal seam, eliminate the outburst danger of the first mining face and solve the gas overrun of the mining face. The method to eliminate outburst by using bottom drainage roadway construction is proposed, which is to use the borehole to pre-drain the strip gas in the coal roadway and the bedding borehole to drain the gas in the mining area. Directional drilling is used to replace roadway（ｏｒ ｈｉｇｈ ｄｒａｉｎａｇｅ ｒｏａｄｗａｙ） + buried pipe in goaf + drainage of gas in mining area by bottom drainage roadway drilling. The problem of gas control in close coal seam group with overlying thick oil shale is solved from two angles of eliminating outburst and preventing overrunning.