Contrast experiments of methane adsorption characteristics of different coal

Experiments of methane adsorption characteristics were done respectively, using different coal from the typical coal mines. The results show that adsorption capacity of non-outburst coal is lower than delay outburst coal and outburst coal which is the highest. If the adsorption capacity of the coal is high, the adsorption methane affects greatly to non-mechanical destructive action and strength. The adsorption curls of different coal are similar that methane adsorption increases fast at low adsorptive equilibrium pressure, but slowly and flatly after 2MPa. The methane adsorption increases little after 2MPa adsorptive equilibrium pressure, even improving methane pressure. The methane adsorption at adsorptive equilibrium pressure decreases increasing experiment temperature, but rang is less. The constant "a" changes no obvious and "b" decreases at linear increasing experiment temperature. It shows that decreasing methane adsorption at adsorptive equilibrium is caused by the "b". The relationship of the methane adsorption and temperature is built and has well correlation property with the measured values.