Failure Characteristics and Stability Control of Bolt Support in Thick-Coal-Seam Roadway of Three Typical Coal Mines in China

Figure 2

The original support scheme and the serious damage of roadway: (a) layout of the test areas; (b) original support scheme; (c) photos of the roadway; (d) borehole camera images and corresponding analysis.

(a)

(b)

(c)

(d)