Evaluation of Rock Mechanical Parameters - Rock Mechanics Based on an Anisotropic Jointed Rock Model - page 595

Table 18.8 Keuper, sandstone and siltstone horizons (Stubensandstein), Stuttgart (Germany)
Rock mass

Elastic constants Strength of intact rock Strength of discontinuities Permeability References

Sandstone: Sandstone: Sandstone: Sandstone: • Wittke & Züchner (2008)

• WBI (2004)

k = 10 -8 - 10 -4 m/s

E = 1000 - 4000 MPa
ν

σ cIR = 10 - 40 MPa φ B = 20 - 30°

c B = 0 - 0.2 MPa
φ J = 30°
c J = 0.1 - 0.5 MPa

= 0.25

Siltstone: Siltstone: Siltstone: Siltstone:

k = 10 -9 - 10 -6 m/s

E = 1000 - 3000 MPa
ν

σ cIR = 3 - 20 MPa φ B = 20 - 25°

c B = 0 - 0.2 MPa
φ J = 30°
c J = 0.05 - 0.5 MPa
φ S = 20°
c S = 0.2 - 0.5 MPa

= 0.25