End Support: Spot Bolts

The application of Spot Bolts works a little differently than the other support types (i.e. pattern bolts, shotcrete, pressure) in Unwedge.

Adding Spot Bolts

To add a Spot Bolt to the ends of the excavation:

  1. Make sure you are viewing the End Support Design view.

  2. In the Sidebar, set the End Wedge Visibility to the desired end wedge that you wish to support (i.e. Near End or Far End, for a horizontal tunnel, or the Roof for a vertical excavation).

  3. Select Add Spot Bolt from the Support menu.

  4. You will see the Add Spot Bolt dialog. In the dialog, enter the bolt length, select the bolt property type, and select OK.

  5. You will then be prompted to enter the location of the Spot Bolt on the face of the end wedge. This can be done graphically with the mouse, or you can enter the coordinates of the point in the prompt line.

  6. The initial orientation of a Spot Bolt (on the end) is always normal to the cross-section.

Note: the spot bolt will only be added to the end wedge specified by the End Wedge Visibility setting (i.e. spot bolts do not get added to both ends of the excavation simultaneously, they are independently defined for each end of the excavation).

Once a Spot Bolt is added with the Add Spot Bolt option, you can then orient the Spot Bolt 3-dimensionally with the Move Spot Bolts option, if necessary.

Move Spot Bolts

For details about the Move Spot Bolts option, see the Perimeter Support: Spot Bolts topic, as the procedure is the same for both end spot bolts and perimeter spot bolts.

Edit / Delete Spot Bolts

See the Perimeter Support: Spot Bolts topic, as the procedure is essentially the same for both end spot bolts and perimeter spot bolts.