Corrosive Environment Assessment and Corrosion-Induced Rockbolt Failure Analysis in a Costal Underground Mine

Table 3

The basic values and units of parameters.

Parameters	Value	Unit	Description
	0.40	/	Frictional coefficient
	375	MPa	Yield strength of the rockbolt
	0.0025	m	Original thickness of the rockbolt
R	0.02	m	Radius of the rockbolt after installation
K	45	MPa/m	Shear stiffness of rock
E	210000	MPa	Elastic modulus of the rockbolt
l	1.80	m	Length of the rockbolt
	0.05~1	mm/a	Corrosion rate in depth
t	/	year	Corrosion time
N	/	1000 kN	Anchoring force