Effects of High-Pretension Support System on Soft Rock Large Deformation of Perpendicularly Crossing Tunnels

Figure 19

Stress-strain curves of slate on triaxial compression tests under different confining pressures: (a) 0 MPa, (b) 10 MPa, (c) 20 MPa, and (d) 30 MPa.

(a)

(b)

(c)

(d)