Change Hole Sequence

Use the Change Hole Sequence option to change the value (name), which is stored in the NAME field of the HEADER table in the blasthole database. This value is used for reporting and plotting purposes.

Initially the value is the same as the numeric part of the hole name that is stored in the HOLEID field of the HEADER table. After deleting and adding blastholes, however, this value will continue to increment.

To allow simple hole numbering for plotting and reporting, the values may be changed. This will update the NAME field but will not affect the HOLEID field, which is used internally as a key field in the blasthole database. The value stored in the NAME field is passed to the object name in the temporary DIG$UGB layer. The value stored in the HOLEID field is passed to the object description.

This option can also be accessed by selecting the Change Sequence button from the UG Ring Design toolbar.

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Instructions

On the Underground menu, point to Ring Design, and then click Change Sequence to display the Change Hole Sequence panel.

If you have not already loaded a blast database, you will be prompted to do so. For instructions on how to do this, see Open Blast Database .

Enter the new starting sequence number. This value will be incremented by one for each of the selected blastholes.

Select OK.

You will then be prompted to digitise the picking line. Right-click when you have finished digitising the line.

After successfully selecting the holes, right-click again to re-sequence the holes. The new sequence numbers are then assigned to the chosen blastholes.

The following diagrams illustrate the difference between hole selection modes. A starting sequence number of '2' was used with all examples.

Figure 1 : Original Sequence Numbers

In Diagram 2, the chosen blastholes have been selected in a clockwise direction.

Figure 2 : Modified Sequence Numbers (Pick Holes Individually)

In Diagram 3, all of the blastholes in the current layout have been selected. The blastholes are numbered according to the order in which they created. The blasthole creation order is indicated by the yellow values.

Figure 3 : Modified Sequence Numbers (Pick Holes inside Layout)

In Diagram 4, a digitised line (indicated in yellow) has been used to select and number the blastholes.

Figure 4 : Modified Sequence Numbers (Pick Holes Using a Digitised Line)