Determination of Reasonable Position for Relieving Roadway in Extremely Thick Coal Seam of Kilometer Deep Mine

Taking Zhaogezhuang Coal Mine of Kailuan Mining Group as the background, we compare and analyze the deformation amount of relieving roadways and stress distribution of coal pillars at the two sides of relieving roadway which is at different positions away from the gob of -1 100 m level at 2338 working face by theory analysis and numerical simulation. According to the research, the optimum arrangement of the relieving roadway, which can relieve high stress in the solid coal and has great significant for support of mining roadway, is at the middle of coal seam 15 m away from the coal pillar.