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

Figure 11

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

(a)

(b)

(c)

(d)

(e)