从现场观察发现高沼气区域巷道贯通后沼气涌山量有急剧衰减现象。对此进行了测定并摸索出掘进巷道煤壁和贯通后巷道煤壁沼气涌出强度q 随测点距掘进头或距贯通点距离 L 的变化分別呈负指数函数和负幂函数指数关系。经多次贯通实践确定了贯通前后沼气涌出量的衰减系数 α,可用来作为贯通计划配风的理论根据。 Observed from the scene found in the high biogas area after the tunnel through the amount of methane surge has a sharp decline phenomenon. This study determined and explored the emission intensity of coal wall biogas gushing out from the coal tunnel and through roadway tunnel. The change of the distance L from the heading or from the penetration point with the measuring point showed negative exponential function and negative exponential function respectively. Through repeated practice, the decay coefficient α of the emission of biogas before and after piercing is determined, which can be used as the theoretical basis for the air distribution through the plan.