Study on Impact Tendency of Coal and Rock Mass Based on Different Stress Paths

Figure 10

Typical failure of rock roof with the same size under different time steps: (a) 10 MPa, (b) 20 MPa, (c) 30 MPa, (d) 40 MPa, and (e) 50 MPa.

(a)

(b)

(c)

(d)

(e)