Study on the Stability of Surrounding Rock of Underground Circular Cavern Based on the Anchor Reinforcement Effect

Table 2

Anchor support parameters.

Parameter	Value
Eb (GPa)	210
P1 (kN)	0
db (mm)	20
tm (mm)	10
L (m)	2.4
Sr (m)	1.0
Sl (m)	1.0
σs (MPa)	335