Abstract: Abstract: 5 working faces are arranged in the five disk area of 12 coal mine in Ulan Mulun coal mine. The length of the working face is relatively short, the length is basically 1080m, the auxiliary retracting channel from the working face is 113m in the big lane, in order to improve the recovery rate of coal resources in the disk area and reduce the waste of coal resources. Fully mechanized mining face, the auxiliary retracement is used as the return air trough, and the rubber transportation roadway is the main transportation trough. When facing the difficulties of fully mechanized face, 9 empty tunnels are required, of which 8 are parallel to the working face and 1 are perpendicular to the working face. Through the empty roadway, we should mainly consider the choice of the supporting way, how to determine the strength of the pillars, and how to determine the form of the pillar parameters.