Open the Case 3a Model

1. Choose File > Open and open Case3A_final.cbf from Files for users/Case_3A_water_crest in the tutorial models download.
2. Choose File > Save As and save a working copy as Case3B_final.cbf in Case_3B_water_toe before changing its inputs. Keep the supplied reference files in a separate folder if you want to compare them later.
3. In Navigation, select Case3_GroundModel1.

Keep the Material and Groundwater Inputs

Retain the five Mohr-Coulomb rock materials and their parameters:

Material	Cohesion (kPa)	Friction Angle (°)	Unit Weight (kN/m³)
Granite_1	1430	27.62	25.1
Granite_2	732	16.68	24.5
Porfirite_1	971	20.01	26.3
Porfirite_2	727	16.61	23.6
Vulcanite	700	33.6	26.4

Keep these shared settings:

Input	Value
Bench definition	Bench height
Bench height for all rock layers	15 m
Bench face angle for all rock layers	90°
Minimum berm width for all rock layers	7.5 m
Target FoS	1.3
Failure Direction	Right to left
Groundwater	The same piezometric line as Case 3a

Prescribe the Toe

With Case3_GroundModel1 selected, open Slope Anchor and set:

Anchor Input	Value
Prescribed point	Toe
Horizontal Toe Position	859 m
Vertical Toe Position (Z)	547 m

Prescribing the Toe Coordinates Expand

Toe-Anchor Geometry Preview Expand

These coordinates are taken from the previous optimised slope in the workbook. In toe-anchor mode, the software calculates the slope height and bench-compatible height from the toe and section geometry. The workbook uses 330 m as its height reference; check the resolved values rather than entering a new crest-mode target height.

The toe must remain inside the section, at or below the topography, and above the section floor. Confirm that the green OSA search region is within the ground area.

Check Groundwater After Changing the Anchor

Confirm that the same piezometric line is still present after selecting Toe and entering its coordinates. If the application removes the water table, restore the imported water entity or redraw the line using the Water Table instructions. Keep the groundwater geometry consistent with Case 3a before comparing the two results.

Save and Run the Simulation

1. Choose File > Save As and save the project as Case3B_final.cbf in the exercise folder. Use a separate working folder if you want to keep the supplied reference project for comparison.
2. Select the Simulation tab beside Visualiser, at the bottom of the main workspace, then select Case3_GroundModel1.
3. Set Simulation results location to Automatic. A section simulation folder is created beside the saved .cbf project when the simulation starts.
4. Click Start. If Simulation Check lists an issue, use Fix to open the affected field, correct it, and select Check Again.
5. Once the check passes, click Start again. Review any later geometry or groundwater warnings and select your configured account if prompted. If the folder belongs to another account, cancel and choose a separate Custom folder to keep its existing results.
6. Monitor the Node status summary and use Fetch results to retrieve the output.

For more detail, see Running Simulations. If the analysis does not start, use Simulation Does Not Start.

Review and Compare the Results

The workbook gives the following examples:

Result	Case 3a: Crest	Case 3b: Toe
Target FoS	1.3	1.3
Achieved FoS	1.323	1.336
Workbook height reference	330 m	330 m
Bench-compatible slope height	330 m	330 m
Fixed endpoint	Crest at 1150 m	Toe at X = 859 m, Z = 547 m

Case 3b Example Result Expand

Check that the toe remains at X = 859 m, Z = 547 m, then review the resolved height, bench geometry, and achieved FoS. Compare the optimised profile and failure mechanism with the Case 3a example.

The supplied Case3B_final.cbf provides the reference setup. Keep the two projects separate so that each run has its own saved model and results folder.

Export and Reuse the Output

1. On the Simulation page, expand Output Tools.
2. Choose the required DXF export format, then click Export DXF.
3. To bring the optimised geometry back into the project, click Create project section from output.
4. Open Visualiser and find the new section in Navigation.

Export option	When to use it
Rocscience	Prepare a 2D DXF for Rocscience software. The orientation is converted to the required import plane and the closed external boundary is generated automatically.
Global	Keep the original global coordinates for comparison with the source model.
Local XZ	Align the section with the XZ plane, with a fixed Y coordinate.
Local XY	Flatten the section onto the XY plane, with a fixed Z coordinate.

Exporting the Optimised Profile Expand

Creating a Project Section from Output Expand

For a Rocscience RS2 workflow, follow Importing Output into Rocscience RS2 and check the imported boundary assignments.

To export optimised slope angles as a block model CSV, follow Exporting the Section Block Model.