Abstract: With the development of deep mining, coal and methane outbursts have become a major hidden danger, and experimental research on the micro-mechanisms of methane storage and transportation is very important. In order to simulate the storage and transportation processes of methane in coal,the nuclear magnetic resonance T₂ spectrum technique was applied for the adsorption-desorption experimental research of high methane and outburst coal from Sunjiawan Mine in Fuxin basin. Results indicated that the T₂ spectrum boundaries of adsorbed methane and porous medium-confined methane and bulk methane could be defined with cut-off time of transversal relaxation time, that the relation between methane pressure and shale-adsorbed methane can be described with a Langmuir equation, that there is a linear relation between methane pressure and porous medium-confined methane, that the desorption processe of adsorbed methane lagged behind adsorption, and the hysteresis critical pressure is 5.5 MPa,and that the hysteresis of porous medium-confined methane is not obvious.

Key words: outburst coal, nuclear magnetic resonance T₂ spectrums, adsorbed gas, porous medium-confined gas, adsorption-desorption