Application of a FBG-Based Instrumented Rock Bolt in a TBM-Excavated Coal Mine Roadway

Figure 8

Monitoring results of axial forces and temperature of rock bolts: (a) monitoring results of number 1 rock bolt; (b) monitoring results of number 2 rock bolt; (c) monitoring results of number 3 rock bolt; (d) monitoring results of number 4 rock bolt; (e) measured temperature changes.

(a)

(b)

(c)

(d)

(e)