Engineering Rock Mechanics

(Jacob Rumans) #1

Units and symbols


There are two reasons why it is important to understand and use
engineering rock mechanics units correctly:
engineering rock mechanics calculations used for rock engineering
design should be numerically correct; and
to use engineering rock mechanics properly, an understanding of units
is necessary.
We have used standard symbols and the SI (International System) of
units. There are seven base units in the SI system: length, mass, time,
electric current, thermodynamic temperature, amount of substance and
luminous intensity. These base units are dimensionally independent.

Base unifs

For engineering rock mechanics, we consider just the length, mass and
time base units.

Base Quantity Nameof SIunit Dimensions
quantity symbol SIunit of unit
Length I metre m L
Mass m kilogram kg M
Time t second s T
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