Engineering Rock Mechanics

142 Permeability z 42 Cross Cross permeability flows Shear stresses Figure 9.2 Equivalence of the shear stresses and the cross-p ...

Permeability of intad rock and rock masses 143 Figure 9.3 Example of water flow through a fractured rock mass. To the right side ...

144 Permeability ture network, rather than equally through all fractures. The idea of the Representative Elemental Volume (REV) ...

Question and answers: permeability 145 the fractures is given by the equation K = 1ge3/12u where 1 is the fracture frequency, g ...

146 Permeability Stl Td; Dimlacement higher-aperture channels formed between the fracture surfaces. Thus, an equivalent hydrauli ...

Question and answers: permeability 147 US National Committee for Rock Mechanics, 19963), packer testing at one location in a bor ...

148 Permeability A9.5 To solve such network problems, we have to set up and solve a series of simultaneous equations for the unk ...

Question and answers: permeability 149 equation for the head at an interior node is Hj = ci,j I (see Section 9.4 of ERM 1, where ...

150 Permeability matrix below is incomplete, although we have included illustrative rows and columns based on the equations give ...

Question and answers: permeability^1 5 1 Finally, we illustrate these heads in the diagram below, using shading to identify the ...

152 Permeability A9.6 We can use the same solution procedure as in A9.5 to determine the nodal head values and hence the flow di ...

Question and answers: permeability 153 Q9.7 The following rock mass hydraulic conductivity data were ob- tained from four sets o ...

154 Permeability when the REV value is of the order of 8 m3. More mathematical ap- proaches could be used to evaluate the REV if ...

Question and answers: permeability 155 A9.8 We note that the maximum principal hydraulic conductivity has a value of 1.596 x lop ...

156 Permeability One can imagine that the normal stress component across the fracture is indeed reduced by the jacking effect of ...

Additional points 157 A9.7 0 In view of the complications described in A9.9, plus in this case the limited crack length, a semi- ...

158 Permeability vanced modelling and approximating many thermo-hydro-mechanical processes (Stephansson et al., 1999 "). " Steph ...

Anisotropy and 70 inhomogeneity 10.1 Rock masses: order and disorder ”The use of laboratory tests to predict the reaction of a r ...

160 Anisotropy and inhomogeneity overlapping footprints in the geometry and mechanical properties that we see today; this is the ...

Questions and answers: anisotropy and inhomogeneity 1 6 1 The understanding of the correct use of the statistical terms 'resolu- ...