Symbols used in this book xv
Symbol Quantity Nameof SIunit Dimensions
SI unit of unit
(Y angle, specifically dip radian, rad;
direction of a plane or degree, deg
trend of a line
B angle, specifically dip radian, rad;
angle of a plane or plunge degree, deg
of a line
BW orientation angle of plane radian, rad;
of weakness degree, deg
Y shear strain 1 LO
Y unit weight kg s-~ m-2 L-~MT-~
ax' ay' az
Al, Sx, Sy, Sz increment of distance, m L
--- a a a partial differential operator
displacement
linear strain
angle
fracture frequency
Poisson's ratio
kinematic viscosity
density
stress tensor
normal stress
principal stress
uniaxial compressive
strength
principal horizontal stress
uniaxial tensile strength
variance
shear stress
angle of friction
friction angle of plane of
weakness
area
cohesion
hydraulic conductivity of a
fracture
Young's modulus
fracture aperture
elastic modulus of rock
mass
force
shear modulus
shear modulus of rock
mass
geological strength index
value
hydraulic gradient
asperity angle
stress invariants
constant of proportionality
number of events
coeffiaent of permeability
radian, rad;
degree, deg
pascal, Pa
pascal, Pa
pascal, Pa
pascal, Pa
pascal, Pa
pascal, Pa
pascal, Pa
radian, rad;
degree, deg
radian, rad;
degree, deg
pascal, Pa
pascal, Pa
pascal, Pa
newton, N
pascal, Pa
pascal, Pa
1 LO
1
m-' L-'
1 -
m2 s-I L~T-~
kg m-3 L-3M
N m-2, m-l kg s-~ L-'MY
N m-2, m-I kg s-~ L-'MT-
N m-2, m-I kg s-' L-'MY
N m-2, kg s-~ L-' m-
N m-2, m-' kg ss2 L-' MT-
N m-2, m-I kg s-* L-1MT-
N m-2, m-I kg s-~ L-LMT-
m2 L
N m-2, m-I kg
m L T-I
L-' MT-~
radian, rad;
degree, deg
m2 L*