It has been proved that the process of coal and gas outbursts is not an adiabatic process accepted by most researchers but a polytropic process that is nearly an isotherm process.
研究结果表明,煤与瓦斯突出不是大多数学者认为的绝热过程,而是一个偏向于等温过程的多变过程。
In chapter three and four, we give some state equations of real gas and the thermodynamical analysis in polytropic process based on the theory of ideal gas.