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在剖析煤系沉积史、埋藏史、热史、生气史的基础上,将淮南煤田的次生生物成因和热成因混合型煤层气的成藏动力学系统分为4个演化阶段：①泥炭浅埋和早期生物气阶段；②煤层深埋和热成因气阶段；③煤系剥露和吸附气散失阶段；④煤系再埋藏和次生生物气补充阶段．淮南煤层气成藏模型具有盆心聚气特征,但是,热成因气不是它的主要气源．在盆地隆升、煤系剥露蚀顶、热成因气大量散失之后,只有得到作为附加气源的次生生物气的有效补充,才能在适当条件下形成这种混合型煤层气藏．
Based on the analysis of sedimentary history, burial history, thermal history and angry history of coal measures, the kinematical systems of secondary biogenic and thermogenic mixed CBM in Huainan coalfield are divided into four stages: ① shallow peat Buried and early biogas phase; ② deep coal seam and thermal genetic gas phase; ③ coal denuded and adsorbed gas loss phase; ④ re-burial coal and secondary biogas phase. The Huainan coalbed methane reservoir model has basin gas accumulation characteristics, however, the pyrogenic gas is not its main source of gas. After the uplift of the basin, the erosion of the coal system, and the loss of pyrogene, the mixed CBM reservoirs can be formed under the proper conditions only by effectively supplementing the secondary biogas as an additional gas source.