Stability of Rock Wedges and Excavation Surfaces - Rock Mechanics Based on an Anisotropic Jointed Rock Model - page 292

(11.1)

in which

(11.2)

(11.3)

are the components of the weight G of the rock wedge normal and parallel to D per
meter,

φ D and c D are the angle of dip and the characteristic shear parameters of D
and l D is the length of the sliding surface of the wedge (Fig. 11.5).

β D ,

Figure 11.5 Two-dimensional rock wedge supported by one discontinuity loaded by self-weight

According to the partial safety factor method, the shear parameters φ D and c D must be

replaced by

(11.4)

(11.5)