煤与瓦斯突出热动力过程的研究

Research of thermodynamic process of coal and gas outburst

利用自行设计加工的煤与瓦斯突出模拟装置 ,通过实验室实验和理论分析相结合的方法研究了煤与瓦斯突出过程中煤体温度的变化规律 .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 .多变指数可以通过实验测定的煤体温度来计算 ,吸附瓦斯和游离瓦斯的膨胀功可以利用多变指数计算 .

In this paper, using self-designed coal and gas outburst experimental apparatus, based on the laboratory tests and theoretical analysis, temperature variation of coal in coal and gas outburst process was studied. 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. The polytropic index can be calculated according to the experiment data of coal temperature, the free gas expansion work and adsorbed gas work can be calculated using polytropic index.