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Slope

Slope Angle

In RocPlane there is no restriction on the inclination of the face of the slope; it can exceed 90 degrees (i.e., the slope crest can overhang the toe of the slope) but must form a valid wedge or sliding block with the other wedge planes. See Geometry Validation in RocPlane for more information.

Slope Height

The Slope Height is the vertical distance from the toe of the slope to the crest (the intersection of the slope face with the Upper Face).

Unit Weight

The Unit Weight of the rock mass is used to determine the total weight of the wedge.

Minimum Wedge Size (Probabilistic Analysis)

The Minimum Wedge Size option allows you to exclude (filter out) the analysis of very small wedges that may be generated by a Probabilistic analysis.

To use this option:

  1. Select the Minimum Wedge Size check box.
  2. Enter a Weight (MN) representing the smallest wedge that you would like to consider in the analysis.
    Any wedges generated by a Probabilistic analysis that weigh less than the minimum wedge weight are discarded from the analysis and not included in the final analysis results.

This option is useful because very small wedges can sometimes give misleading analysis results (e.g., very low Factors of Safety, and may be difficult to see on the model (e.g., very thin slivers). In general, it is larger wedges that are of the greatest concern in a RocPlane stability analysis. Although the Minimum Wedge Size option is OFF by default, it is recommended that you enable the option for a Probabilistic analysis to filter out the analysis of very small wedges.

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