Relationship Analysis between Lead Abutment Pressure and Gas Emission in High Gas and Fully-Mechanized Coal Face

Gas emission of coal body in front of working face is an important part of the gas emission amount in the whole face.Gas pressure change of coal body has a direct impact on the gas seepage velocity,and the gas pressure changes of coal body in front of working face is influenced by the coal stress.Therefore,there is a certain relationship between face lead abutment pressure and coal gas emission.The paper monitored the relationship between the gas emission of coal body in front of working face and lead abutment pressure.Through the analysis of the monitoring results and numerical simulation,the change relation between lead abutment pressure and coal gas emission amount is analyzed.