The Mechanism of Interface Dilatancy of Cement Mortar Rockbolts

Table 5

Mechanical parameters of the materials.

Rockbolt	200	0.3
Grout	18	0.24	1	35
Rock	32.5	0.21	3.8	56
Interface layer	2	0.35	0.5	30

At present, there are two extreme methods for addressing the dilatancy angle.