Structure of Rock - Rock Mechanics Based on an Anisotropic Jointed Rock Model - page 32

With the aid of κ s as

a measure of persistence of a discontinuity set relating to a reference volume V = A

κ p and s or κ p and k, respectively, the spatial degree of separation

⋅ s

may be described as follows (Pacher 1959):

(2.10)

2.7.3 Structural Models
Models of the grain structure of the intact rock and the discontinuity system must be
superimposed to obtain a structural model of a rock mass. Fig. 2.33 shows examples
of structural models as a result of such a superposition. These examples show that, to
a certain extent, structural models allow us to estimate whether the deformability of a
rock mass is isotropic or anisotropic (Chapter 3).

Figure 2.33 Structural and corresponding elastic rock mass models