The Analysis of Time-Space Effect of Surrounding Rock Deformation of TBM Tunnels in Deep Composite Stratum with or without Support

Figure 16

Main test image with support model. (a) 0.25 MPa. (b) 0.48 MPa. (c) 0.58 MPa. (d) 0.67 MPa.

(a)

(b)

(c)

(d)