Cutting roof roadway regional stress characteristics numerical analysis of thin coal seam group in Taoshan Mine

Aimed at effective controlling rock burst hazard,this paper discusses the simulation and analysis of the stress state characteristic of the Taoshan Mine cutting roof roadway region by FLAC3D and study on presplitting weakening effect and layout parameters as in the case of cutting roof roadway.The results show the occurrence of a higher vertical stress on the low side of return airway and gas roadway,along with the obvious concentration of the horizontal stress in floor and low side of the return airway,the obvious concentration of stress of cutting roof roadway,the resultant rise in the level of rock burst hazard,and stress concentration in the range of 5～10 m due to cutting roof roadway.It follows that distance between two cutting roof roadway are no less than 20 m,to avoid stress concentration regions by two adjacent cutting roof roadway superposition.The research provides reference basis for rock burst prevention of cutting roof roadway of mining thin coal seam group in Taoshan Mine.