Research on Plastic Zone Evolution Law of Surrounding Rock of Gob-Side Entry Retaining under Typical Roof Conditions in Deep Mine

Figure 4

Plastic zone evolution process of deep gob-side entry retaining with thick immediate roof. (a) 2000 steps, (b) 4000 steps, (c) 6000 steps, (d) 8000 steps, (e) 10,000 steps, and (f) 12,000 steps.

(a)

(b)

(c)

(d)

(e)

(f)