Fig.7

Rock full stress–strain curve: (a) unperturbed total stress-force-strain curve (b) stress–strain of 8 MPa curve disturbance (c) stress–strain curve of 14 MPa disturbance (d) stress–strain curve of 20 MPa disturbance.
Rock full stress–strain curve: (a) unperturbed total stress-force-strain curve (b) stress–strain of 8 MPa curve disturbance (c) stress–strain curve of 14 MPa disturbance (d) stress–strain curve of 20 MPa disturbance.