Large Section of Soft Rock Gob-Side Entry Retaining Surrounding Rock Control

Figure 11

Y-direction stress variation curve: (a) charge diameter 32 mm, (b) charge diameter 36 mm, (c) charging diameter 40 mm, (d) charging diameter 44 mm, and (e) charge diameter 48 mm.

(a)

(b)

(c)

(d)

(e)