Engineering Rock Mechanics

234 Rock mechanics interactions and rock engineering systems (RES!

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by blasting

and stress

41 concentrations

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a Sink

Design of opening!

to allow for in situ

"

I Drainage during

Construction

Figure 14.11 Rock mechanics-rock engineering interaction matrix.

variation of discontinuity frequency for a sampling line passing through

one, two and three sets of mutually perpendicular discontinuities in

Fig. 7.11. Along the leading diagonal of the three-dimensional loci in the

figure are illustrated the individual variations for each set; the binary

combinations for of any two sets are shown in the off-diagonal terms. This

matrix is symmetrical because the frequencies are added for each set-a

process which is commutative. However, it is only when adding the three

sets, as shown at the bottom of the figure, that we obtain the full three-

dimensional locus.

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0

1-

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Rock 'basic mechanics science' I2 I I 00.

component I 2

;q

!m 3'

1

engineering

Figure 14.12 Architecture of the rock mechanics-rock engineering matrix

illustrated in Fig. 14.11.