对铁法盆地的地质背景、煤系上覆地层和埋藏史、岩浆活动、煤体结构、煤阶分布、煤变质特征等进行了综合分析，认为铁法盆地的煤变质以浅成岩浆热变质作用为主；煤层热解气生成的时间、条件和方式受煤变质过程控制；煤变质与煤层气是同一地质环境下一个事物的两个方面 Based on a comprehensive analysis of the geological background of the Tiefa Basin, overlying strata and burial history of coal measures, magmatic activity, coal structure, coal rank distribution and coal metamorphism, it is considered that coal metamorphism in the Tiefa Basin is characterized by shallow magmatic thermal metamorphism ; The time, conditions and methods of pyrolysis gas generation are controlled by coal metamorphism; coal metamorphism and coal bed methane are two aspects of one thing in the same geological environment