Abstract: Taking underlying 3₂ coal seam of Xutuan Coal Mine under Palaeogene super thick red beds settled layer as the research object, some methods were used to analyze the gas occurrence laws and research the outburst prediction indexes and critical value of 3₂ coal seam. The results indicate that whether the red beds cover or not, it has a significant effect on the gas occurrence laws of 3₂ coal seam. The multiple physical parameters of those coal samples have no obvious difference under the coverage area of the red beds and the non-coverage area. The index of gas pressure could serve as the judge index of prediction, and the index △h₂ could serve as the judge index of the local prediction, and the "three rates" analysis was adopted to verify the accuracy of the index △h₂.