Given that the confining pressure raises, the increase in resistance to longitudinal crack propagation brings about a gradual changeover of shale failure manner from longitudinal to inclined shear failure that displays an escalation in rock plasticity. When the confining tension reaches 30 MPa, there remain neighborhood shear microcracks around https://andregdzuo.wikigiogio.com/2432083/wellbore_stability_in_drilling_secrets