Experimental Investigation on Strain Changes during CO2 Adsorption of Raw Coal Sample: Temperature and Effective Stress

Through laboratory simulation experiments, this paper studies the influence of different temperature and stress conditions on strain changes raw coal samples induced by CO2 adsorption with tri-axial creep-seepage adsorption-desorption experimental system. Comparing analyzing results, study shows that: (1) within a certain time, axial radial sample both show growing trend as time increases for is obvious anisotropy; (2) at same point in greater effective stress, smaller increasing rate loaded during process value deformation; (3) process, volume decreases temperature, namely, capacity temperature.