Evaluation of Rock Mechanical Parameters - Rock Mechanics Based on an Anisotropic Jointed Rock Model - page 603

Table 18.21 Keuper, marl, predominantly siltstone (Obere Bunte Mergel), Stuttgart (Germany)
Rock mass

Elastic constants Strength of intact rock Strength of discontinuities Permeability References

k = 10 -10 - 10 -7 m/s

E = 1000 - 3000 MPa
ν = 0.3

σ cIR = 5 - 30 MPa φ B = 25°

c B = 0 - 0.2 MPa
φ J = 35°
c J = 0.2 - 0.5 MPa
φ S = 20°
c S = 0.2 - 0.5 MPa

• WBI (2004)