How to create a Long Section Puncture Plot in SURPAC Part 3

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Blog Part 3 of 4 | SURPAC – Outlining the Ore Body with greatest value with a contoured gram meter plot.

As a Geologist, you may be asked to produce a contoured gram meter plot to outline areas of the ore body that have the greatest value or potential ore shoots. This plot can also highlight areas of wider stopes, that then require more ground support during mining. This plot can also highlight areas where more drilling is required to upgrade the resource/reserve.

This is the 3rd blog in the series “plotting long sections”. The files created in blog 1, from the functions “Database>Composite>by Geological Constraints” and “Database>extract>zone thickness and depth” are required for this process.

 

Merging of Thickness and Grade Data

 

Step1

If we are to calculate gram meters, then we need to merge the true thickness field into a file with the grade field. To do this:

File tools>Combine/Split file options>Merge fields from multiple files

 

 

We are going to copy the thickness field which is in D2 to d10 in the merged file.

 

 

 

You can right click on the file in the navigator window and click on edit. This will open up the file in note pad. You can then see the result of the function.

 

 

 

 

 

Calculation of gram meter’s

Step 2

Open up the resultant file. Using Graphics Layer Maths, multiply d1*d10.

We are writing the result to a temp field first, so we can then round the result to 2 decimal places.

 

 

Contouring Data

If you are wanting to contour the data, then depending on the orientation of the ore body, the data will need to be transposed to plan co-ordinates to contour, then transposed back to real co-ordinates.

 

Data to contour is in a y-z Orientation.

 

 

 

STEP 3

Using Edit>layer>maths

copy the y,x,z into d11,12,13 so you have a reference during the transformations.

Save the file.

 

 

 

STEP 4

Using Edit>layer>maths you can now transform the data.

 

 

 

STEP 5

Save the data as “transposed”

 

STEP 6

Create DTM and follow steps in the following blog to contour

https://blogs–3ds–com.apsulis.fr/geovia/contouring-soil-assay-results-in-geovia-surpac/

 

STEP 7

You will notice that the contours are a distance away from the dtm. This is because the Z value is the contour interval.

Using Edit>layer>maths, copy the z value into an available dfield, save the file and refresh the graphics.

 

 

 

STEP 8

Open up the dtm, open up the contours, Surfaces>Drape string range over dtm and save.

 

 

 

STEP 9

Once the data has been contoured it will need to be transposed back to real world co-ordinates. To check the maths, transform the dtm first. Then transform the contour file.

 

 

 

STEP 10

You can then follow the steps in the previous blogs to plot the contours with the puncture points.

 

 

 

 

Learn more about SURPAC 

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Links to all posts in this 4 part BLOG Series

Don’t forget to check out the rest of this blog series on Creating Long Section Puncture Plots in Surpac.

 

Part 1: Click here | In the first post we show how to create a Long Section Puncture Plot of the Mine Ore Zone displaying Hole ID, grade and true thickness.

Part 2: Click here | In the 2nd post, we look at creating an entity to display the hole ID, thickness and grade and to create a legend.

Part 3: Click here | In the 3rd post, we go through the process of creating a gram-meters plot and contouring the data.

Part 4: Click here | In the 4th post, we describe how to outline the Ore Body with greatest value with a contoured gram meter plot.

 

 

 

 

 

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Kim Ferguson-Thomas

Kim Ferguson-Thomas

Technical Customer Support Consultant, GEOVIA at Dassault Systèmes
Kim Ferguson-Thomas has more than 20 years’ experience as a geologist in the mining industry, working in exploration, underground and open-cut mines within Australia.