Evaluation of Rock Mechanical Parameters - Rock Mechanics Based on an Anisotropic Jointed Rock Model - page 598

Table 18.12 Alternating sequence of sandstone and sand-, silt- and claystone layers, Eifel near Co l ogne (Germany)
Rock mass

Elastic constants Strength of intact rock Strength of discontinuities Permeability References

Unweathered: — φ Sch = 30°

c Sch = 0
φ J = 30°
c J = 0

Unweathered: • Wittke et al. (2012)

k = 10 -8 - 10 -7 m/s E = 10,000 MPa

ν = 0.35

Weathered: Weathered:

E = 4000 MPa
ν

k = 10 -7 - 10 -5 m/s

= 0.35

Table 18.13 Bunter (sandstone), near Bleicherode (Germany)
Rock mass

Elastic constants Strength of intact rock Strength of discontinuities Permeability References

E = 230 - 970 MPa
ν

σ cIR = 3 - 8 MPa φ B = 10 - 17°

c B = 0 - 0.14 MPa
φ J = 20 - 35°
c J = 0 - 0.1 MPa

— —

= 0.25