What can I model using RS 3?

Transcription

1 What can I model using RS 3? We are often asked about the modeling capabilities of RS 3, and whether or not the program can model certain situations. This article addresses many of your RS 3 modeling questions, and demonstrates the wide range of complex models that can be created, focusing on civil and mining applications. Sequenced stope modeling Circular shaft in oblique strata Topography with stope mining Topography with tunnel Dam Raft with piles Open pit slope stability Tunnel with two headings Twin tunnels with diagonal staircase Prepared for Spring 2014 issue of RocNews

2 Sequenced Stope Model You can easily model stope mining in RS 3. We have prepared a brief tutorial to illustrate a simple drift mining and backfill sequence. Note that with the powerful meshing capabilities in RS 3, you can easily customize the mesh for individual volumes (see the Mesh Customization in RS 3 Developer s Tip from a previous RocNews for 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

3 Circular Shaft in Oblique Strata Even though models in RS 3 are created by extruding 2D slices, you are still able to capture a lot of detail in the models. Here we ve modeled a circular shaft in an oblique material, both in the vertical and horizontal modes. The circular shaft has a diameter of 2.5m, and a length of 50m. Models Extruded in horizontal direction Extruded in vertical direction

4 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

5 Distance Along Query (m) Total Displacement Along Query Horizontal Mode Vertical Mode Total Displacement (x10-3 m) Comparison of total displacements along query lines

6 Excavation Contours The excavation contours for the two models are also quite similar. Excavation contours (left: vertical extrusion; middle: horizontal extrusion, front view; right: horizontal extrusion, side view)

7 Terrain with Stope Mining Here we ve added some simple terrain to the stope mine shown above, illustrating that multiple model details can be captured in RS 3. Top and 3D view of model Side view of model

8 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

9 Z-direction displacement contours

10 Raft with Piles In a previous RocNews we talked about piled raft modeling in RS 3 (see Modeling Foundations in RS 3 ). 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 we ll look at a piled raft foundation for a building. Piled raft foundation model Total displacement contours (two user-defined query planes)

11 Open Pit and Slope Stability (Manual SSR) RS 3 can 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

12 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 Designer to 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

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

14 Twin Tunnels with Diagonal Tunnels This model was done in the horizontal mode, and again demonstrates that the complexity of the model can be increased by increasing the number of slices. In the figure below, notice that the slice density is much higher in the area of the diagonal tunnels. Model geometry Total displacement contours