The study on anchorage characteristics of flexible pressurized anchor should be along with theoretical analysis, numerical simulation and test study. Through comparing three calculation results, it is concluded that the theoretical analysis and numerical simulation can authenticate the correctness of calculation process each other; After considering the situation that friction coefficient changed with different contact pressure stress, the deviation of calculation of theory derivation and numerical simulation with experimental results significantly reduced; Anchor was simplified for anisotropic composite material body, which should be able to better reduce deviation among test, theoretical derivation and numerical simulation calculation.

On account of analytic method and test method are difficult, we use the finite element method on flexible inner pressure bolt, Obtaining: The adjacent formation elasticity coefficient is bigger this kind of anchor rod the anchor effect to be better; Within a certain range, the anchor rod body rubber material elasticity coefficient is smaller is more advantageous in enhances the anchor rod the anchor effect; Increase the coefficient of friction between the bolt and surrounding rock, Can significantly improve the anchor bolt effect; Anchor maximum impedance friction stress uniformly distributed along the axial direction, This causes the flexible note to press the anchor rod to have the big superiority.