Roof Bolting Anchoring Performance Research on the Entry under the Gob of Close-Distance Coal Seam

Figure 11

Displacement distribution around entry for different seam spacing.

(a) 3 m seam spacing

(b) 4 m seam spacing

(c) 5 m seam spacing

(d) 6 m seam spacing

(e) 7 m seam spacing

(f) 8 m seam spacing

(g) 9 m seam spacing