Numerical Simulation Study on Reasonable Horizon of Floor Drainage Roadway in Yi'an Mine

For Yi'an working face containing with water,if the floor drainage roadway is near the coal seam floor,it will deform severely and can not continue service to the adjacent working face,at the same time,the through beds hole is difficult to seal due to the broken surrounding rock,which results in the bad drainage effect. However,if the floor drainage roadway is far away from the coal seam floor,it will not only increase the quantities and drainage material consumption of through beds hole,but also cause the water inrush accidents.Combined with the actual occurrence of Yi'an Mine 12150 working face,the stress of the floor drainage roadway in several layout conditions by FLAC^3D software is simulated.Based on the simulation test and analysis result,the reasonable arrangement of the floor drainage roadway is discussed.