Experimental study on influence of confining pressure on shale mechanical properties under high temperature condition

High temperature conventional triaxial compression test of shale were carried out by using the MTS815 servo-controlled testing machine,based on the results of the tests,the relationships between confining pressure and the characteristic of shale stress-strain curve,peak strength,elastic modulus,Poisson's ratio,peak strain were investigated,and the general regulation is obvious.According to the characteristics of volumetric strain,the...