Colliery fire damp is taken out and is put drilling structure

The utility model discloses a colliery fire damp is taken out and is put drilling structure, including the drilling of low level crack, the department at drilling yard is arranged to drilling opening in low level crack, drills whole hole site in force piece upper portion coal body department. The drilling of low level crack is provided with two rows, every row of 4 holes, and the trompil interval is 500mm, and open height is 2.1m and 1.8m, azimuth 2 - 14.5, the angle of elevation 9.9 - 11.5, drilling depth is 80 -100m, the whole hole length of normal 11.6m -14m that drills, drilling is put down apart from 5m -29.5m. Along with the advance of the face adopt with the caving coal, force piece upper portion coal body breaks, gathers between the support in gas pours in support upper portion coal seam crack, the construction is taken out and is adopted the whole hole of drilling in force piece upper portion coal body to the utilization is taken out and being adopted drilling and take out to put and gather gas between the support, gathers gas between the prong of portion of effective preventing and controlling face tail portion (going up the corner) frame, guarantees the working face and normally keeps the safety in production.