Based on 2792 mines,173 mining areas and 22 provinces maps of mine gas-geology,the 1:2500000 coalmine gas-geological map of China was finished.It was further developed the theory and technology route of coalmine gas occurrence tectonic level control,and the 10 types of geologic tectonic control were found.According to these,coalmine gas occurrence and distribution in China was divided into 29 areas,including 16 high and outburst gas areas and 13 low gas areas.These achievements have been providing the base ...