Study on Influence of Joint Distribution on Surrounding Rock Failure of an Underground Tunnel

Figure 9

Stress-crack counts of models with different spacing between joints and tunnel.

(a) Intact

(b) Spacing: 0 mm

(c) Spacing: 10 mm

(d) Spacing: 20 mm

(e) Spacing: 30 mm

(f) Spacing: 40 mm