Page 227 - Numerical Analysis and Modelling in Geomechanics

208 I.-M.LEE AND D.-H.KIM

(7.19)

(7.20)

where a bar over a symbol indicates the mean of the model parameters.
Assuming there are no correlations among the parameters, the covariance matrix
is expressed as:

(7.21)

where Var(·) is the variance of (·).
If the ground motion due to underground excavation is more or less elastic, the
number of parameters is reduced to two as follows:

(7.22)

(7.23)

and

(7.24)