The combined effect of fractures and mineral content on coal hydromechanical response

Abstract The hydromechanical behaviour of fractured coal is a complex function interaction between bulk and fracture deformation driven by fluid pressure external stress. Despite the research studies conducted to date, combined effect mineral content structure on sorptive remains unexplored. To study this effect, we performed series X-ray computed tomography (XRCT) imaging range specimens with non-sorbing (helium) sorbing (CO 2 ) gases at different effective stress paths using newly developed transparent triaxial system. compressibility system components was obtained from processed 3D XRCT images which were used interpret results. results show that matrix/solid has positive nonlinear relation irrespective type. Effective coefficient also strong both porosity. Furthermore, increase in leads less opening an helium pressure. Interestingly, strength more significant than Finally, open fractures shows swelling gas adsorption under due damping volume internal volumetric strain.