Dynamic Rock-Breaking Process of TBM Disc Cutters and Response Mechanism of Rock Mass Based on Discrete Element

Figure 6

Failure characteristics of rock mass under different confining pressures: (a) 0.0 MPa, (b) 10.0 MPa, (c) 20.0 MPa, (d) 30.0 MPa, and (e) 40.0 MPa.

(a)

(b)

(c)

(d)

(e)