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

<div>(a) Picture of guide rod and (b) picture of YTJ20 stratum detector.</div>

Advances in Civil Engineering

Figure 6: Occurrence Mechanism of Roof-Fall Accidents in Large-Section Coal Seam Roadways and Related Support Design for Bayangaole Coal Mine, China 