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In this video we go through creating a simple open pit categorical model to use in the reporting of resources on the block model in Leapfrog Edge.

Duration

5 min

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Video Transcript

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(soothing music)

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<v Instructor>In this video,</v>

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I’m going to take you through creating a pit model,

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which can be used in the reporting of estimates.

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The basis of the method is to create a categorical model

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to code onto the block model and to do this,

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we’ll use the geological modeling tools.

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I’ve already created a geological model,

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which you can see in the scene here

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and I’ve estimated gold

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into a couple of the domains already.

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So let’s go and make our pit model.

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So come to geological models, new geological model.

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Now, the base lithology column, I’m going to set to none,

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because I’m not going to use any

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of the coding from the drill holes

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because that’s not going to be relevant to me.

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Enclose object, the quickest way is

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to use a pre-existing model,

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so I’m just going to use my domaining model.

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And then just rename, pit model.

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Before I start creating the pit model,

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I need to put some coding into the lithologies table.

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Because we use the base lithology column of none,

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I have nothing in here.

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So I need to add a couple, so I just want what’s inside

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and what’s outside of the pit.

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It’s just the one pit I have.

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So it’s just very simple inside, outside, okay.

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(soothing music)

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So this is the pit I’m going to use, the pit mesh.

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You can see that Leapfrog has recognized

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that this side of the pit, which is the inside is, is red

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and the outside of the pit is blue.

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So this is just important to note for

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when you start building your model.

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So you can define what’s the first lithology

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and the second lithology.

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So this is probably the more logical way to think of it.

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And you could always reverse the polarity of your meshes

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if it’s reversing what you expect it to do.

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To do that, you open

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and you can invert mesh orientation here.

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I won’t do that now.

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So, back on my pit model, surface chronology,

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new deposit from surface, I’m going to use that mesh.

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There we go.

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So the first lithology, which is younger,

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is going to be inside my pit.

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So I’m going to use that inside coding.

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And my second lithology is going to be outside.

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So I can activate this.

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I’m going to set the background lithology to outside

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and press okay.

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And then I’ve got inside and outside.

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So let’s just switch these others off.

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And that looks correct.

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So I will go ahead and evaluate this onto my block model.

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Pit model, just bring it across onto the evaluations

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and let that run.

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So now I will just double check on my model

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to see that that has coded on as I was expecting.

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Pit model, switch this off.

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So I can see, yes, red inside

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and this funny green on the outside.

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So let’s go ahead and make a resource report.

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To make a resource report,

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you need a category on your model.

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So, well, at least one category.

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I’m going to use my domain model

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so I can report by domain and my pit model,

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and then my combined AU,

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which is basically for both of my domains

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that I’ve estimated.

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I need to select or tell it what units to use.

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Now, I’ve also got these invalid values here.

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So this is just where there are blocks

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in these domains that have not been estimated.

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So just by applying a cutoff, we’ll get rid of those blocks.

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And now I can see down the bottom here,

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the two domains that I did estimate.

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And you can switch which way round you view this,

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and you can see that I’ve got zero tonnes for most of these

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because I didn’t do any estimates,

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so I can just switch those off.

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I can change the units as well,

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so let’s put that back to ounces,

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and decimal places and things you can sort out.

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Not interested in the unknown, okay.

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So now I’ve got inside and outside,

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which is useful to have, but in my case now,

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I only want to report inside the pit.

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So, the best thing to do now would be to apply a filter

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so I can get rid of this column.

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So I’m going to go back onto my block model here,

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right click and select calculations and filters.

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New filter.

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Inside the pit.

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And then I’m just going to use the items I have on my model.

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And then the syntax is here.

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So, where the pit model equals, expand that out, inside,

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so that’s going to be my filter for inside the pit.

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I’ll just come back to the scene to check

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that this filter’s done correctly.

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Inside, so yeah, it’s filtered my model out.

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So if I change that to AU.

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Yep, that’s definitely worked.

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I can go back to my resource report, select the filter,

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and now I can take off this column here, I don’t need that.

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And there’s my report for my estimates within a pit.

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I can go ahead and copy this table out

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and paste it into Excel.

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I hope that was useful for you.

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If you have any questions, please contact us

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on your local support email address, or office.

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(soothing music)