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Validate and Display Data Maptek™ Vulcan™ Training

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1 Validate

Drillhole Data

Open the Drillhole Database There are two ways to open a database in Isis.

1. Launch Isis from the Start Page. Alternately, click the Launch button and select Isis. When prompted, select the database Filename and click OK.

2. Expand the User Databases container in Vulcan Explorer. Double-click on the database name to open in the file Isis.

Validate Drillhole Data Validate the drillhole data to check for errors which may cause issues when modelling.

1. In Isis, select Utilities > Validate.

2. Enter a new specification name such as Drillhole_validate.

3. In the Select Database pane, select the drillhole database.

4. At a minimum, run the following checks:

a. Unique Collar Location to check for duplicate holes.

b. Overlapping Intervals to ensure assay intervals do not overlap.

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4 Chapter 1 Validate Drillhole Data

5. On the Report panel:

a. Enter a Report file name such as drillhole_report.

b. Select to View Report in Excel. 6. On the Save and Run panel, click Save and then click Run.

7. If any checks fail, view the error report and address any errors.

8. After addressing any errors, save the database and run the validation again to ensure all validation checks pass.

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2 Display

Drillholes

Create Legend A colour legend is required to view drillholes.

1. In Envisage, select Analyse > Legend Edit > Legend Editor.

2. Under the DRILL category, double-click New Legend.

3. Right click the legend name, select Rename, and enter an intuitive legend name.

4. Choose Alpha to create a legend from alphanumeric fields, such as geology or lithology. Numeric legends are more common as numeric legends will display intervals by grade assays or other numeric values.

5. Select Use Database to populate drop menu items. Pick the database and related fields from the drop down menus.

6. Automatically populate Colour Ranges with the Data Range tools. Alternately, manually enter values for the Colour Range.

7. Select a Colour for each interval in the Colour Range.

8. In the Legend Editor, select File > Save and exit the Legend Editor.

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6 Chapter 2 Display Drillholes

Load Drillholes 1. Select Geology > Drilling > Load Drillholes.

2. A prompt to open a database appears if a database is not open in Envisage. Select the required drillhole database.

3. Configure how drillholes should load and click OK. At a minimum ensure an appropriate Colour legend is selected.

Tip: If the database contains many drillholes, restrict which holes load.

Troubleshooting Issue The drillholes trace does not fully display.

Figure 2-1: Example of incomplete traces

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Solution The colour legend does not define intervals which span all available data. A common cause for this issue is failing to consider default assay values such as -99.

To fix the issue, open the legend in the Legend Editor, create a bin for -999 to 0, and set the colour to grey. Also elect Null values and nonlogged intervals and define a colour. Select Geology > Drilling > Remove Drillholes to remove loaded drillholes. Select Geology > Drilling > Load Drillholes to reload the drillholes in Envisage.

Figure 2-2: Holes corrected with colour legend

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8 Chapter 2 Display Drillholes

Issue Traces display as vertical. Why are the dip and direction values in the survey table not used?

Figure 2-3: Vertical drillholes

Solution Either a desurvey style is not specified or the survey synonyms are not set correctly.

Caution: The procedure outlined below requires changes to the header of an existing database. Always make a copy of a database before altering the header.

1. Launch Isis. See “Open the Drillhole Database” on page 3. 2. When prompted to open a database, click Cancel. 3. Select File > Open Design. Choose Header of Headered Database and

select the required database.

4. Click the Attributes button.

a. Choose Drilling as the Type.

b. Select Tangent as the Desurvey Style.

5. On the Survey table:

a. In Table Properties, select Survey as the Synonym.

b. Correlate synonyms for Bearing, Inclination, and InterceptDepth to existing fields.

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6. Select File > Save and click OK when presented with a warning.

7. Select File > Quit Isis.

8. Reload the drillholes in Envisage to ensure the traces respect values in the Survey table. See “Load Drillholes” on page 6.

Important: Select Geology > Drilling > Open Database in Envisage to ensure corrections to the header are read.

Figure 2-4: Holes display correctly after altering the database header

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