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

Figure 15

Maximum and minimum principal stress cloud diagrams when Panel 31113 is 10 m from penetration. (a) When the main and auxiliary withdrawal spacing is 30 m, (b) when the main and auxiliary withdrawal spacing is 25 m, and (c) when the main and auxiliary withdrawal spacing is 20 m.

(a)

(b)

(c)