Stress Distribution and Optimum Spacing Determination of Double-Withdrawal-Channel Surrounding Rocks: A Case Study of Chinese Coal Mine

Figure 9

Principal stress cloud diagrams when Panel 31113 was 50 m from penetration. (a) Main and auxiliary withdrawal spacing = 30 m. (b) Main and auxiliary withdrawal spacing = 25 m. (c) Main and auxiliary withdrawal spacing = 20 m.

(a)

(b)

(c)