Abstract: In order to reveal laws of gas storage and transport in gob with parallel double U-shape ventilation and put forward effective gas control measures,Taken coal face of NO.92116 in Xinjing Coal Mine of Yang Coal Group as the research object.Considering the coal face advancing speed,air quantity of intake airflow roadway,thickness of left mine in gob,the gas amount of mine in coal mining area,initial gas emission rate of working face of coal wall and other measured parameters,the perfect mathematical physics model of gas emission in gob was Established.The variance of results of numerical simulation and measured results was less than 15%.The simulation results show that gas concentration in the first link roadway in gob,gas concentration in return-air roadway,gas concentration in upper corner increased with working face advancing speed growth in the form of Langmuir function,with air quantity of intake air-flow roadway growth decreased in exponential form.according to this problem of gas overrunning in the first link roadway in gob,governance effect of extraction-gas measures in the scend link roadway in gob was analyzed quantitatively.