Mine gas disaster poses a threat to the health and development of China coal industry, people’s lives and property.To control the gas disaster, we need to understand and master the gas desorption laws of tectonically coal. The main factors that affect the gas desorption laws of tectonically coal are damage types, grain sizes, metamorphic grade, adsorption balance pressures of tectonically coal, temperature, moisture and so on. Now many scholars at home and abroad do a cerain amount of research on th...