Model Test of Anchoring Effect on Zonal Disintegration in Deep Surrounding Rock Masses

Figure 17

Anchor strain changing with the excavation steps. Note: No. 12 anchor was damaged during the test and the data could not be recorded.

(a) Nos. 1–5 anchor strain changing with excavation steps

(b) Nos. 6–10 anchor strain changing with excavation steps

(c) Nos. 11–15 anchor strain changing with excavation steps