Mechanism and Control of Cable Breakage in a Roadway with Thick Top Coal in a Rockburst Mine

Figure 3

Borehole peep image under different borehole depths. (a) 1.6 m. (b) 2.5 m. (c) 3.1 m. (d) 4.0 m. (e) 4.3 m in depth. (f) 4.8 m in depth. (g) 6.2 m in depth.

(a)

(b)

(c)

(d)

(e)

(f)

(g)