The shear strength of layered rocks possesses anisotropic characteristics. So in studing the slope stability and shear failure orientation the changes of with the layered directions should be considered. The expression of for layered rocks are proposed. Based on the expression
taking a bedding rock slope for example
the influences of changes of slope height
orientation of cleavage plane
loads on top of slope and specially on the stability and shear failure orientation are calculated and analyzed.