Abstract: To ensure the safety tunneling of transportation roadway at 5103 mining face, combined with characteristics analysis of rock structure at 5103 working face, and further using FLAC^3D numerical simulation to carry out the excavation simulation, the paper draws the following conclusions: there is no adjacent layer above C5 coal seam, and arranging bottom drainage roadway has good effect in gas control of C3 coal seam, but the damage depth of floor is deeper and the layout in mudstone increases the maintenance difficulty; according to the constrastive analysis of arranging spatial position, the work amount of drilling field construction in high drainage roadway is smaller; the stress disturbed area is simulated, and the arrangement of high drainage roadway is chosen accordingly; the left side of 5103 transportation roadway is adjacent to the coal pillar near goaf, and the optimization of final hole spacing on the left side of the drill field can achieve pressure relief and gas extraction and ensure the normal excavation of mine roadway ultimately.