在实验室对不同瓦斯(CO2，CH4，N2等)吸附过程中煤体温度的变化进行了研究，证实煤体吸附瓦斯的过程是放热过程；煤体吸附不同的瓦斯时，放出的热量不同：吸附CO2时最大，CH4次之，N2最小；煤对其吸附能力越强的瓦斯，吸附时放出的热量越大.对于同一种瓦斯，吸附的瓦斯压力越大，即瓦斯吸附量越大，吸附过程放出的热量越大. In the laboratory, the change of coal temperature in different methane (CO2, CH4, N2, etc.) adsorption process was studied, and it was confirmed that the process of gas absorption by coal was exothermic. When coal adsorbed different gas, the heat released was different : The maximum adsorption of CO2, followed by CH4, N2 minimum; coal for its adsorption capacity of the gas, the greater the heat released when the adsorption.For the same gas, the adsorption of gas pressure, the greater the amount of gas adsorption, The greater the heat released by the adsorption process.