Occurrence Mechanism of Roof-Fall Accidents in Large-Section Coal Seam Roadways and Related Support Design for Bayangaole Coal Mine, China

Figure 15

Monitoring results of roof displacement and stress on anchor cable (bolt) at section II. (a) Monitoring results of roof displacement, (b) displacements of roof stratum at different depths, and (c) monitoring results of stress on anchor cable (bolt).

(a)

(b)

(c)