Fig. 20
The distribution of the plastic zone of the surrounding rock during the mining process of the 1802 working face: (a) Plane plastic zone distribution after 600 m excavation; (b) Profile plastic zone distribution after 600 m excavation; (c) Plane plastic zone distribution after 1000 m excavation; (d) Profile plastic zone distribution after 1000 m excavation; (e) Plane plastic zone distribution after 1800 m excavation; (f) Profile plastic zone distribution after 1800 m excavation; (g) Plane plastic zone distribution after 2600 m excavation; (h) Profile plastic zone distribution after 2600 m excavation; (i) Plane plastic zone distribution after 3400 m excavation; (j) Profile plastic zone distribution after 3400 m excavation; (k) Plane plastic zone distribution after 3900 m excavation; (l) Profile plastic zone distribution after 3900 m excavation.
