The distribution of gas emission in fully-mechanized face of high gassy coal seams

Under high gas emission and closed distance coal seams in Shaqu Mine, the gas concentration overrunning often appears in the upper corner and the return-air current of fully-mechanized face 14205,which seriously threaten the production safety of coalface.In order to grasp the situation of gas emission and its changing rule, ensuring the production safety of this fully-mechanized face, the paper analyses the gas emission sources and its constitution in fully-mechanized face of high gassy coal seams. By theory analyzing and measuring in scene, gas emission distribution laws and gas enriched locations of the fully-mechanized face are given, which is used to provided an important guide to comprehensive gas control of the fully-mechanized face.