关键词: 煤与瓦斯突出, 构造煤, 瓦斯放散特征, 解吸动力学, 钻屑解吸指标

Abstract: The vast majority of coal and gas outburst occurred in geological structures, therefore, study of difference between tectonic coal and primary coal is of great importance for exploring coal and gas outburst mechanisms. In order to explore the frequent occurrence of coal and gas outburst accidents in the coal mine of Shijiazhuang, Yangquan Coal Group, by conducting constant-temperature gas emission test under different equilibrium pressure conditions for primary coal and tectonic coal samples, significant difference in the gas emission characteristics of primary coal and tectonic coal were obtained, especially for the initial stage of gas emission, gas desorption speed of tectonic coal is significantly higher than that of primary coal, and this difference was also reflected in the field test results of coal and gas outburst prediction, desorption index of drill-cuttings, K1 values, and tectonic coal thickness was positively correlated, the research shows that the coal and gas outburst in No. 15 coal seam of Sijiazhuang Coal Mine is obviously controlled by tectonic coal, and this research result will provide technical support for coal mine and gas outburst prevention and control.