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

Figure 10

Field observation results and maintenance effects of the roadway: (a) monitoring results of the surface displacement in the roadway; (b) monitoring results of the axial load of the flexible bolts and anchor cables; (c) field photo of test roadway.

(a)

(b)

(c)