CO 2 interaction induced mechanical characteristics alterations in coal: A review

Abstract

Coal geo-mechanical alterations caused by CO 2 interaction should be critically evaluated to enhance the efficiency of CO 2 -ECBM and CO 2 sequestration processes, while mitigating associated hazards. We provide a detailed overview on the CO 2 interaction induced mechanical alterations in coal, by comprehensively reviewing the influential parameters and causative factors. Although studies provide persuasive evidence to conclude the general fact that CO 2 interaction causes severe mechanical degradation in coal, the degree of strength reduction is influenced by numerous parameters: 1) stress state - elevated in-situ stresses diminish the CO 2 -induced coal strength reduction, due to reduced C..