Characteristics of gas content of No.13-1 coalbed in Panyi coal mine of Huainan field

On the basis of geological condition and comprehensive analysis of 92 gas content data,which is actually measured from No.13-1 coalbed in Panyi coal mine of Huainan field,three mathematical models of the variational gas content were built.The results show that gas geology cell should be taken into account to analyse gas content.The variety of gas content are related linearly with the depth of bedrock surface(not the depth of the ground surface),but the relationship are different in different gas geology cell of the same coal bed.