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What can

I model

using RS3?We are oen asked about the

modeling capabilies of RS3, and

whether or not the program can

model certain situaons.

This arcle addresses many of

your RS3modeling quesons, and

demonstrates the wide range of

complex models that can be cre-

ated, focusing on civil and mining

applicaons.

Sequenced stope

modeling

Circular sha in

oblique strata

Topography with

stope mining

Topography with

tunnel

Dam

Ra with piles

Open pit slope

stability

Tunnel with twoheadings

Twin tunnels with

diagonal staircase

Prepared for Spring 2014

issue of RocNews

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Sequenced Stope Model

You can easily model stope mining in RS3. We have prepared a brief tutorial to illustrate a

simple drift mining and backfill sequence. Note that with the powerful meshing capabilities in

RS3, you can easily customize the mesh for individual volumes (see theMesh Customization in

RS3

Developers Tip from a previous RocNewsfor details).

The Simplified Mining Sequence Tutorial walks you through the modeling and results viewing

for a sample drift mine.

3D view of excavated drift with ore and backfill

Total displacements on an excavated volume

http://www.rocscience.com/library/rocnews/fall2013/RS3_3D_Meshing-Customization-Developers-Tip.pdfhttp://www.rocscience.com/library/rocnews/fall2013/RS3_3D_Meshing-Customization-Developers-Tip.pdfhttp://www.rocscience.com/library/rocnews/fall2013/RS3_3D_Meshing-Customization-Developers-Tip.pdfhttp://www.rocscience.com/library/rocnews/fall2013/RS3_3D_Meshing-Customization-Developers-Tip.pdfhttp://www.rocscience.com/library/rocnews/fall2013/RS3_3D_Meshing-Customization-Developers-Tip.pdfhttp://www.rocscience.com/library/rocnews/fall2013/RS3_3D_Meshing-Customization-Developers-Tip.pdfhttp://www.rocscience.com/library/rocnews/fall2013/RS3_3D_Meshing-Customization-Developers-Tip.pdf

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Displacement Results on a Horizontal Contour and Line Query

The figures below compare the total displacement results on a contour near the bottom of the

shaft.

Extruded in horizontal direction

Extruded in vertical direction

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Comparison of total displacements along query lines

30

32

34

36

38

40

42

44

46

48

50

0 0.02 0.04 0.06 0.08 0.1

DistanceAlongQuery

(m)

Total Displacement (x10-3 m)

Total Displacement Along Query

Horizontal Mode

Vertical Mode

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Terrain with Stope Mining

Here weve added some simple terrain to the stope mine shown above, illustrating that

multiple model details can be captured in RS3.

Top and 3D view of model

Side view of model

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Dam

This model illustrates the type of detail you can get by increasing the number of slices. The dam

model below was constructed with approximately 130 slices.

Dam model

Total displacement contours

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Z-direction displacement contours

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Raft with Piles

In a previous RocNews we talked about piled raft modeling in RS3(seeModeling Foundations in

RS3). In that article we looked at the following models:

- Vertically loaded pile in clay

- Piled raft foundation in sand (with different configurations of piles)

- Piled raft foundation in multiple material strata

Here well look at a piled raft foundation for a building.

Piled raft foundation model

Total displacement contours (two user-defined query planes)

http://rocscience.com/assets/files/uploads/9101.pdfhttp://rocscience.com/assets/files/uploads/9101.pdfhttp://rocscience.com/assets/files/uploads/9101.pdfhttp://rocscience.com/assets/files/uploads/9101.pdfhttp://rocscience.com/assets/files/uploads/9101.pdfhttp://rocscience.com/assets/files/uploads/9101.pdfhttp://rocscience.com/assets/files/uploads/9101.pdf

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Open Pit and Slope Stability (Manual SSR)

RS3can be used to model slope stability in open pit mines. The simplified full-scale open pit

model below was used to examine the effect of the three-dimensional geometry on wall

stability.

Open pit mesh

Contours of total displacement at SRF=2.5

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Tunnel with Two Headings

This model took approximately 15 minutes to build and run, and demonstrates the utility of the

Sequence Designer. The modeling steps were as follows:

1. Import tunnel geometry (as excavation boundary). The tunnel could also be defined

within the program.

2. Add external boundary.

3. Define Heading boundaries.

4. Use the Sequence Designerto specify the excavation sequence.

5. Assign material properties.

6. Assign restraints (underground auto-restraint option)

7. Mesh model (kept default settings)

8. Compute and view results

Tunnel model

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Total displacement contours

(left: exterior contours, query plane; right: excavation contour)

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