Abstract: In view of the problems that gas control is difficult in Mengjin mine and uncovering coal needs too long time, combined the roadway layout conditions, through two-way partition elimination outburst drilling and upper-lower parallel operation mode, we solved the problems of unidirectional drilling too long and large final hole deviation, and proposed the idea of key drilling control key points. Practice showed that with 50 days gas drainage operation, the gas drainage rate of the uncovering area was reached to 50.2%. After the outburst prevention measures, the residual gas content value reduced to 3.37 to 6.20 m³/t, the max value of the drilling cutting gas desorption index △h₂ was 100 Pa. Used pilot tunnels, remote blasting and other measures achieved a safe uncovering coal seam.