Research on the gas-desorption laws of massive tectonically coal

Based on the experimental study of gas desorption laws of different damage level,different metamorphic grade,different pressures,different temperatures and different moisture of tectonic coal,concluded the laws that the total gas-desorption volume of unit tectonically coal is increased with increasing of damage level,temperature and pressure,and it is decreased with the increasing of metamorphic grade,moisture in coal,this research result provided a theoretical basis for the prevention and treatment of gas disaster of coal mine.