温度变化对煤体瓦斯吸附量影响规律的实验研究

Experiment Study on Effects of Temperature Variation on Coal Gas Adsorption Capacity

通过对含瓦斯煤层瓦斯气体温度场分布规律研究,提出了煤层中总的瓦斯含量方程中α值的假设与猜想。经过实验,分别研究了定压条件与升压条件下温度改变对煤与瓦斯吸附的影响规律,得到煤体在不同温度下瓦斯的吸附以及渗流规律。实验应用WY98-A型瓦斯吸附解吸仪器,通过研究煤与瓦斯吸附在温度改变的环境下的规律,以及所选煤样在吸附饱和后随温度变化的函数关系,并对瓦斯吸附的饱和吸附量进行了数学拟合,得到其函数关系式。为煤层瓦斯储量计算,及不同阶段瓦斯抽采量计算提供了科学依据。

On the analysis of gas temperature distribution of coal seam gas,assumption and conjecture ofαvalue in the overall equation of gas content were proposed.In the condition of constant pressure and increasing pressure,the experiment obtained the coal and gas adsorption and seepage law at different temperatures.WY98 Agas adsorption/desorption instrument was used in the experiment.By setting different temperatures,the experiment studiedαvalue in function relationship between the coal sample saturated adsorption and the temperature,and conducted mathematical fitting for the saturated adsorption,and finally obtained the function relationship,which could provide a scientific basis for the calculation of the gas content in coal seam and quantity of drainage at different stages.