Blast Displacement

When a Blast Design layer is the active layer in Vizex:

  • On the Mining | Blast Design > Charging tab: Click Blast Displacement.

When a Blast Design layer is NOT the active layer:

  • On the Mining tab, in the Production group: Select Blast Design | Blast Displacement.

This tool is also available from the Grade Control tab, in the Blasting group

The Blast Displacement tool provides a visual representation of the potential displacement of ore blocks resulting from a blast. This information can be used with drill pattern and shot orientation data to help minimise ore displacement and dilution during future blasting.

If a String layer has not been selected as the active layer, you will be prompted to select a String layer:

If no polygons are selected, the Selection Assistant will prompt you to select the polygon or polygons you want to displace.

You will then be prompted to optionally select or draw any static (immovable) polyline(s) or polygon(s) to displace the original polygons to:

You can skip optional steps using the Skip selection option in the toolbar for the assistant, or displayed at the right of the step text.

Alternatively, you can Digitise the required object/s using the button in the Selection Assistant toolbar. The Selection Assistant will close, providing access to the tools used to create the object.

When you make and accept a selection the Blast Displacement form is displayed.

The Blast Displacement tool requires the following data:

  • The polygon or polygons you have selected which represent grade control or ore blocks (based upon measurements made prior to blasting).

  • Two Point files which represent PRE and POST BLAST MARKERS:

Files

Specify the Point files that contain the pre- and post-blast point data. Each file must contain corresponding coordinate and marker ID fields.

Displacement Polygons

Save displaced polygons to original file

Select this option to save the displaced polygons to the original file.

Save displaced polygons to file

Select this option to save the displaced polygons to a new file. Select a file type. Double-click (F4) to navigate to the location of the file.

Displacement Vectors

Display displacement vectors

Select the Display displacement vectors option to display vectors that show the displacement between pre and post blast markers (as shown in the example below).

Save displacement vectors to file

Select this option to save the displacement vectors to a new file.

Autoload files

When this option is enabled, the displacement vectors that are saved to a new file are displayed once the function has run.