Engineering geology aspects for design and classification - Tunnel Engineering: Basics and Additional Services for Design and Construction - page 39

Table 2-7 shows an excerpt of the properties from L. Müller. For the definitions, influences
and ways of determining the properties, reference is made to [159].

Table 2-7 Rock mass properties (excerpt) from L. Müller [159].

Strength behaviour Deformation

behaviour

Properties related
to technical working
methods

Behaviour of the
rock mass in relation
to formation water

rock mass compressive
strength
rock mass tensile
strength
rock mass shear
strength
strength behaviour
under spatial stress
states
rock mass toughness
brittleness

rock mass elasticity
transverse deformation
rock mass partial
moveability
flow susceptibility
time-dependent flow
susceptibility
creep susceptibility
tendency to elastic
after-effects
thixotropy

stability
rock fall susceptibility
squeezing behaviour
extraction strength
softening susceptibility
dimensional stability
cuttability
frost and weather
resistance

water absorption
rock mass permeability
water flow suscepti-
bility

Figure 2-4 Interfaces in rock [49].