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Figure 12.3 Q system, evaluation of support classes (Barton et al. 1974)
Figure 12.4 Q system, input parameters for the evaluation of support classes (Barton et al. 1974)
A total of 38 support classes are defined, in which support class 1 requires almost no
support whereas for support class 38 the largest amount of support is necessary. For
each support class, the amount of support can be taken from tables. As an example, for
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Rock Mechanics Based on an Anisotropic Jointed Rock Model
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