Effect of coal rank on various fluid saturations creating mechanical property alterations using Australian coals

摘要: During CO2 sequestration in deep coal seams, the mass may be subjected to various fluid (CO2, N2, etc.) saturations. Therefore, order maintain long-term integrity of process, it is necessary identify mechanical responses preferable seams for To date, many studies have focused on saturation effect strength and less consideration has been given influence other mediums. Hence, this study aims investigate coal’s water N2 saturations compared determine coal-rank. A series unconfined compressive (UCS) tests was conducted Australian brown black samples saturated with at pressures. An advanced acoustic emission (AE) system utilized changes crack propagation behaviors under each condition. According results, both act similarly by enhancing ductile properties weakening greater high-rank coal. Conversely, slightly enhances delays enhancement can improved increasing pressure.