Numerical Simulation of Rock Burst Prevention in Inner Alternated Roadway Under Slice Mining

According to the mining conditions of 1105 working face in Shanzhai Coal Mine,stress distribution laws of lower slice inner alternated roadway in the mining process is analyzed. Alternate distance is simulated and discussed by using FLAC2Dto find out the stress distribution of coal pillar and lower slice working face. The following conclusions show that the stress in the coal pillar will superimpose due to the larger stress under condition that the alternate distance is less than the influence distance induced by the roadway tunnels; while the alternate distance is larger the influence one,the stress in the coal pillar is mainly influenced by the stress relief of the roadway mining. Finally,the reasonable alternate distance is 4 m.