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

Table 2

Results of rock bolt pull-out experiment.

	Number 1 rock bolt	Number 2 rock bolt	Number 3 rock bolt	Number 4 rock bolt	Average
(nm/kN)	0.01013	0.01015	0.00971	0.00998	0.00999
(nm/°C)	0.00699	0.00697	0.00652	0.00683	0.00683