Efficient Gas Drainage Technology Practice of Placing Screen Pipe in Borehole of Soft and Low Permeability Coal Seam

In order to solve the collapse problem of bedding borehole in soft low permeability coal seam, we carry out efficient gas drainage technology test for bedding borehole under full screen pipe insertion in Yima Coal Group Xin'an Mine working face. By contrasting the extraction concentration and pure quantity data of mining-coal bed bedding borehole under full screen pipe insertion and non full screen pipe insertion, gas extraction concentration and pure quantity of single-hole with full screen pipe insertion technology is more than 1 times than the contrast hole, which achieves the goal of "drilling in place, screening in the end, optimizing extraction effect" and ensures a safe and efficient mine production.