Experimental investigation of the influence of CO2 and water adsorption on mechanics of coal under confining pressure

Adsorption of CO2 into the coal matrix causes significant alterations in coal's mechanical properties and this process may be further complicated by water+CO2 saturation. The aim of this study is therefore to investigate the hydro-mechanical property alterations of coal with various fluid saturations under in-situ stress conditions. A series of tri-axial strength tests coupled with acoustic emission (AE) analysis was conducted on high-rank coal...