Face Detection

• Stope Reconciliation
• Training Videos

Window Overview

Group octree blocks into faces with similar geometry. Assign tags for type and direction.

There are two options for defining faces. The automatic tool should face simple geometries while the manual tool might be required for more complex stope shapes.

The octree structure is used to define the faces.

dica

Group octrees into faces with similar orientations.

Once created, faces can be tagged with a face type (e.g., rock, drive, fill).

Melhor prática

Octrees associated with drives or backfill faces should be given their own face. Accurate tagging and proper grouping allows for more reliable filtering in analysis.

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Automatic Variables

1. Tolerance Angle

   • Sharpness to be considered an edge.
   • Refer to the Vector Average marker style.

2. Minimum Blocks

   • Required area to form a face.
   • Refer to the Element Count column.

These two variables cover most cases.

3. Maximum Variation

   • merge neighbouring faces surpassing an allowable angle variation.
   • Range: 0 = flat, 1 = variable.
   • Refer to the Variation column.

4. Neighbouring Faces Min Blocks

   • Area before merging neighbouring faces less than this size.
   • Refer to the Element Count column.
   • Useful for grouping faces associated with domes or tunnels.

Automatic Tool Parameters

• Tolerance angle - defines the lowest angle allowed between faces.
• Min number of blocks - minimum required to initially form a face.
• Element count reference - check the Element Count column for block counts.
• Neighbouring Faces - Max variation - upper threshold for variation before merging.
• Variation reference - deviation in design orientation per face (from the Variation column).
• Neighbouring Faces - Min blocks - faces with fewer blocks than this number are merged.

dica

Start with tolerance angle and minimum blocks first — these cover most cases.

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Manual Tool

• Use F2 to select octree as a seed point. Faces are flood filled from this seed. The threshold defines edges to limit the fill. CTRL+F2 defines multiple seed points.

• After each face is defined, click Save Face.

• One or more faces can be reset by ticking these faces in the panel, then clicking Reset Ticked Faces.

• Manual exclusions can be defined using selection boxes to help defined faces.

dica

If the automatic detection gets close, but not quite there. Click Keep Auto Faces and Switch to Manual. Problem faces can be reset and re-faced as required.

Manual Tool Parameters

• Selecting face - use F2 to select; adjust spread with the threshold.
• Detection threshold - acts like an angle tolerance. Larger values = wider spread.
• Saving face - save when satisfied. Not all octrees need to be initially selected.
• Allocate leftovers - map remaining octrees to the most appropriate face.
• Reset ticked face - delete and restart if the result is unsatisfactory.

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Tag assessment

• Face Type

  • This opens a popup to assign the type of face e.g. rock, drive, fill etc. All rock can be used to initially which leaves relatively fewer faces to tag.

• Face Direction

  • This opens a popup to adjust the direction of face e.g. footwall, crown etc.

dica

Use quick allocation for speed, but refine later with detailed tagging in the table.

cuidado

Type Tags must be assigned to continue.

⏭️ Next Step: Click "Development".