Creating the Block Model2007 Dr. B.C. Paul{Note The Name MineSight and the Program described are property of Mintec Inc Tucson, Arizona}

Now Lets Set Up A Model View for My Block Model

Name My Model ViewI pickedBlock Model

Pick My Project Control FileIf you dont know to type it in - Browse

Select My ModelObviously aFile 15

Pick My Primary Display Item

Click on Apply to Tell It What to DisplayThe Difference between apply and Ok (Apply applies what ever changes you haveMade but leaves the dialog box open for adjustment. Ok also closes the dialog box.

And There Is the Start of Our Block Model

Model Ranges and Crashing MineSightMineSight is a graphically intensive programRelies heavily on your graphics cardA large file will bury the video card and cause a crash (exactly when is usually sensitive to what kind of video card you have)We Usually try to limit the display range to avoid a crashing overloadIt started bringing up just the top level of the model to avoid the problem.

Home on the Range or setting the display limitsClick on the RangeTabI want to see 1/4th ofThe model

1- Ill set for full height2- But on NorthingAnd Easting range IllOnly display each(Ie I will look at 1/4thOf the model)

Now Hit Apply

Im Beginning to See My Block Model

Go to the Geometry Tab to Bring in the Top and Bottom Surfaces that will provide for Air Block IdentificationNow Use the Red Boxes to Start Searching for my Top and Bottom File

Probe Down to Select the Geometry for the Model Top (and Bottom)I Need to HitAnother red boxNow I willSelect myTop andBottomSurface andSay Ok

Now Ill Select My Solid SurfaceAnd click Ok

We Will Now Proceed to Code the Model By the % of a Block Within Our Surface(Note that this will identify our Air Blocks)Highlight the GeometryWe will use for codingOur modelInstruct the program toBegin coding the model

We Are Now Getting Ready to Code the Air BlocksTell the program to codeEach block with the %Between our surfacesAlso have the programMake an initial passAnd set everything to 0So that blocks truly inThe air will be 0% rockCheck the boxPut a 0 in herePick this from a pullDown menu of choices

Holy Water Bugs We Have A Problem!When I check whichVariable I put this inI discover I didntInitialize my blockModel with a variableFor % rock.

Not to Worry We Will Use Compass to Add the Variable

Open the Project File Editor

Pick File CloneWe will copy the file and add our extra variable. As with most windows programs youCannot copy an item to itself. We save it as another name and then clone it back again.

It Asks Me What File I Want to CloneI will use the drop down and pick my file 15 and then give the clone command

Now I Have Access to Add My VariableIm going to type inRock%Then I willClick the saveicon

Now Overcoming My ProblemUsing the menuList at the side IPull up variablesI could store thisIn. - I like RockThen click Ok

It Tells Me It has Updated my Block Model (specifically it has labeled my air blocks 0% rock)

Ill Also Save a New Geometry Set called Rock

Now Were Ready for the Good StuffWe will openCompass andInterpolate the gradeFrom our drill holesInto our blocks

Pick the Menu Tab in Compass to Choose the Interpolation Routine

Playing with the Routine Filters (So We Dont have to Look at 40,000 routines for the right one)We drop down theGroup menuAnd pick

3D Modeling

More FiltersPull Down theOperations Menu

And Pick Calculation

Pick the Interpolation RoutineThe name of theRoutine we pick isPintrp.dat

It is a model interpolationroutinePicking it starts the process

It Wants to Know Our Interpolation TechniqueMost of the choicesInvolve some sortOf Kriging.

We are going to pick11Inverse DistanceWeightingMove on

It Wants to Know What Files to Use for Inputs and Outputs and how much of the model to interpolateSince we areUsing the usualProcedure in theUsual way theDefaults areWonderful

Move on

Next It Wants to Know How Far to Interpolate a SampleYour knowledgeOf the geology tellsYou how far a sampleIs still relevantMy picks were300 M x direction300 M y directionDefault 0.1 inZ direction (keepsInterpolation onSame bench only)

And requiring 2Samples to doAn interpolation(ie I wont use just one sample)PythagoreandistanceMove on

It Then Gives an Optional Search Parameter ScreenIll move on

The Last Thing It Wants to Know is the Power to Use on the WeightingThe default is two which is standard inverse distance squared. Thats Fine

It Now Wants to Find Out Which Parameters to InterpolateThe little arrowsOffer pull downOptions

Obviously I wantTo interpolateCopper and MolyFrom my compositeAssays in the drillholesAs for calculation type I want to do IDS (I could use thisFeature to estimate my blocks by different methods andSee the differences)

After Loading In My Responses I Move On

It Asks for Anything Else It Should Weight Samples ByIll pick length(ie a longer compositeGets more weight)Move on

I Can Search in an Ellipsoid for Samples (you might do this with anisotropies in kriging)Ill move on

It allows me to reject interpolating off of extreme values if I consider some grades to be extreme outliersIm not worried for my data set moveon

It Allows Me to Reject Samples if the Rock Type of Some Other Geologic Parameter Does Not MatchSince we are ignoring geology we can move on

Note It Tells Us the Last Set of Specialized Options is Our Last ScreenIts asking what to do with uniterpolated blocks the default is label themMissing better than setting 0 because they may be undiscovered ore

The Routine Takes Off

We Can See We Now Have A Lot in Our File 15 Block Model

We Also Have A Very Exciting Block ModelOrange is Our HighGrade OreYellow is AboveCut-Off Grade

Green is Our LeachOre