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Slope Properties
The slope in Swedge is defined by two planes referred to as the Slope and the Upper Face. Swedge uses Block Theory to determine if a removable wedge can be formed by the intersection of two joint planes with the two slope planes.
Slope planes and wedge
The slope properties are entered in the Input Data dialog. Required properties are:
Optional slope properties include:
Slope properties, Input Data dialog
NOTE: the Dip Directions of the Slope Face and Upper Face do not have to be the same (i.e. the crest of the slope does not have to be horizontal).
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Slope Properties: Height
The Slope Height is required input data for an Swedge model. If no other scaling parameters have been defined, the Slope Height determines the wedge size. The Slope Height is defined as the vertical distance from the base of the slope to the crest of the slope (i.e. the line of intersection of the two slope planes).
Arbitrary wedge illustrating the definition of Slope Height (H1)
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Slope Properties: Bench Width
The Bench Width is an optional input parameter, which can be used to limit or scale the wedge size according to bench width (i.e. the width of the Upper Face slope plane). The Bench Width is measured as the horizontal distance from the crest of the slope, even if the Upper Face has a non-zero dip.
Definition of Bench Width (top view of slope)
Enabling the Bench Width option is recommended for a Probabilistic or Combination analysis, to ensure that extremely large wedges are not generated in the direction of the Upper Face.
For more information see the Bench Width topic in the Swedge help system.
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Slope Properties: Length
The Slope Length is an optional input parameter, which can be used to limit or scale the wedge size according to the length of the slope. If the Slope Length is NOT specified, then Swedge assumes that the length dimension of the slope is sufficient to accommodate the maximum wedge size computed for the slope (i.e. by default, the Slope Length is unlimited).
Definition of Slope Length used for wedge sizing in Swedge
Specifying a Slope Length is recommended for a Probabilistic or Combination analysis, to ensure that extremely large wedges are not generated parallel to the slope.
For more information see the Slope Length topic in the Swedge help system.
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Slope Properties: Overhanging
Swedge can analyze slopes where the crest of the slope overhangs the base. To analyze an overhanging slope, select the Overhanging checkbox in the Input Data dialog, and enter appropriate Dip and Dip Directions of the Slope Face and Upper Face planes.
Overhanging slope option
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