ROCK3D is a program for stability analysis of removable blocks on
planar rock slopes. It
identifies and analyses all the blocks that have formed under each
kinematic mode. Once the geometry of the rock blocks has been identified,
the bolt forces necessary to reach a required safety factor are
structural geology data collection is carried out through the introduction
of the joint orientations and the co-ordinates of the end points
of the joint traces that are visible on the slope surface.
The rock slope orientation and the rock mass parameters are also
necessary for the evaluation of the safety factors and for the design
of the rock bolts.
analysis of the discontinuities is performed through hierarchical
and non-hierarchical clustering procedures, that allow one to identify
the joint sets.
kinematic modes that could give rise to the formation of removable
blocks are determined using the Goodman and Shi "Key Block
program calculates the maximum closed contours that result from
the intersection of the joint traces, which follow a given kinematic
mode. The procedure should be repeated for each kinematic mode to
identify the worst safety conditions.
The program then calculates the shape of the complex blocks that
can be obtained as a union of all the elementary polyhedra that
are compatible with the selected kinematic mode, and which are contained
within the closed contours identified in the previous stage.
volume and surfaces of each block are then calculated.
computation ends with the determination of the rock block safety
factors and of the rock bolt forces that are necessary to obtain
the required stability conditions.
an option, the program can generate a random distribution of the
joints on the rock slope face, to formulate hypotheses on the behaviour
of the slope after a subsequent stage of excavation.
output is made up of the projection on equal-angle stereonets of
the joint sets, the plot of the joint traces on the slope face,
the polar stereographic projection used in the "Key Block Theory"
and the perspective projection of the rock blocks.
is also possible to produce a left and a right view of the blocks,
which can be seen in three dimensions with a common stereoscope.
that include the input data and the results of the various calculations
can also be generated.