Structure Coal Distribution Law and Affected to Coal and Gas Outburst in Sichuan Coal Mining Area

With the study on the structure coal in the coal bearing stratum of Late Permian and Late Triassic in Sichuan main coal mining area, there were big differ ences of structure coal in different structure location, different age and different seam distribution and the structure coal distribution generally showed the divided zone and selected layer development features.The structure stress role affected to the inner part of the basin was weak, it was the zone with less failure degree to the coal st ructure.' The thickest seam structure coal within the compressional structure zone would be the best developed.Analyzed the information of coal and gas outburst in Sich uan Province, the most developed area and layer of the structure coal was obtained, and it would be the serious area and layer of coal and gas outburst.The developme nt degree of the coal structure and structure coal would have important control role to the coal and gas outburst.