Preliminary Discussion on Comprehensive Research Method for Rock Burst in Coal Mine Based on Newton’s Second Law

Figure 5

Evolution laws of fracture and stress fields at different advancing stages of coal and oil shale combined mining. (a) 25 m. (b) 50 m. (c) 75 m. (d) 100 m. (e) 125 m.

(a)

(b)

(c)

(d)

(e)