the rock and mortar is simulated by solid mass element
the cable is simulated by structural element
the interface is setted between the rock and mortar
and the prestress is applied to the cable according to the new method in FLAC3D program,that is to say
the board in pressure diffusion anchor cable is simulated by structural element rather than the distributed loads gained by the theoretical analysis are applied to the board. And then the numerical simulation model of prestress anchorage is established
After that
the stress nephogram of the interface
rock and mortar mass is analysed; and then the axial stress along cable in rock mass
bond stress distribution between mortar mass cell and membrane
which is affected by pressure diffusion anchor cable are displayed more clearly.