Plot > Strength Factors > Δσub Excess Stress
Plot > Strength Factors > RCFub Rock Wall Condition Factor
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Contours the strength for ub-plane wall stress. These components can be accessed via the Strength Factor Components toolbar as follows:
This toolbar can be changed to a vertical orientation by dragging is against either the right or left hand edge of the main window. It can be changed back to a horizontal orientation by dragging is against either the top or bottom edge of the main window.
Selecting the
To calculate the ub-plane wall stress, the stress state at each point on the grid plane is reoriented to determine the maximum and minimum tangential stress parallel to the ub plane.
The maximum wall stress for a virtual circular excavation oriented perpendicular to the ub-plane can then be determined as [ 3 σ1u - σ3u ]. Note that σub is oriented normal to the ub-plane. Also note that σub, σ1 and σ3u are perpendicular to one another.
•dip direction is measured positive clockwise from the y-axis. •dip of the plane is measured positive down from the horizontal (i.e. the dip direction). •plunge of the normal is measured positive down (i.e. negative up) from the horizontal.
The orientation of the ubiquitous shear plane is set using
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