Mechanism of Dynamic Failure in Roadways with Thick and Competent Roof Strata: A Case Study

Figure 18

Distribution of the damaged zone in variable width chain pillars. (a) Width of the chain pillar was 20 m. (b) Width of the chain pillar was 30 m. (c) Width of the chain pillar was 40 m. (d) Width of the chain pillar was 50 m.

(a)

(b)

(c)

(d)