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Modelling Chapter 11: The Block Menu
Options
Choosing Block}}Display }}Options brings up a submenu of choicesthat let you define the way block model data is displayed in 2D.
Draw First Outline as Block Outline
Toggle Block}}Display }}Options }}Draw First Outline as BlockOutlineOn to expand the f i rs tvalue outline to encompass the entirecell, or Off to scale the first outline as defined in the cell display
profile. Remaining outlines will be scaled as defined in the cell display
profile.
Draw Outline Grid
Toggle Block}}Display }}Options }}Draw Outline Grid On to drawa grid to show cell boundaries or Off to not draw the grid. The grid is
most useful when not drawing the first outline as the block outline.
Utils
Choosing Block}}Utilsbrings up a submenu of choices that let youinterface with Whittle 3D pit optimization software. You can also
convert SEGs to surfaces and surfaces to SEGs .
Export to Whittle 3D
Choose this command to export economic block model data as
parameter files and economic files which can be processed by Whittle
3D pit optimization software. A series of dialog boxes will guide you
through the export process.
1. ChooseBlock}}Utils }}Export to Whittle 3D.
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Section IV: Modelling Menus Gemcom for Windows
2. I f th e block m odel i s not r egul ar, a status box will appear, warning
you that Whittle processing will not proceed. UseBlock}}Create
}}Create/Edit Block Model Project to define regular level
heights.
3. Define the Whittle export parameters in the following series of
dialog boxes. You may choose Back to return to a previous dialog
box.
See theWhi tt l e 3DU ser M anualfor more details on input data.
Define Source and Target Data
In the Source and Target dialog box, you can choose the economic
models and parts thereof to export to Whittle 3D and the names of
destination files.
Sour ce and Tar get d i al og box
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1. In the Source and Target dialog box, choose Load settings and follow
the instructions below under L oad Sett i ngsto use previously saved
export settings,
Or ,
Enter the following data:
Gemcom economic block model. Use the Choose modelbutton to invoke the Select Economic Models dialog box. Follow
the instructions underSel ect E conom i c M odel s D i al og Box
below to specify the models you wish to export.
Whittle model parameter file. Enter the path and name ofthe .MPA file where you wish to store modelling parameters
entered in this series of dialog boxes, or use the Browse button
to invoke the Browse dialog box for searching your projects.
Whittle economic file. Enter the path and name of the .ECO
economic file you wish to create, or use the Browse button to
invoke the Browse dialog box for searching your projects.
Top SEG.
Block folder. Choose the folder containing the elevation
model which contains the top SEG.
Elevation model. From the elevation models in theselected folder, choose the model containing the top SEG.
Top SEG. Choose the SEG which is to be the top SEG.
Select source blocks. Depending on which blocks you wish to
export to the Whittle 3D economic file, activate the radio buttonalongside All blocks in model, Blocks within the current selection, orBlocks outside the current selection.
I f you di d not choose to expor t al l bl ocks, choose the followingSpecial blocks for export, if desired:
Include air blocks. Check the box to export all air blockslying above the top SEG regardless of whether they fallwithin the selection.
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Section IV: Modelling Menus Gemcom for Windows
Include all blocks intersecting surface topography.Check the box to export all blocks intersecting the top SEGregardless of whether they fall within the selection.
Export with thresholds on Gemcom economic model. I fyou wish to limit the blocks exported to those in which the
economic value falls within a certain range, check this box;
otherwise, uncheck it.
I f you checked th e box, ent er th e foll owi ng data : Lower threshold. Enter the lowest economic value to be
exported.
Upper threshold. Enter the highest economic value to beexported.
Copy settings from an existing Whittle parameter file. I f
you wish to load export parameters previously saved in an .MPAfile, check this box; otherwise, uncheck it.
I f you checked th e box, ent er th e foll owi ng data : Whittle parameter file name. Enter the path and name
of the .MPA parameter file you wish to load or use theBrowse button to invoke the Browse dialog box for
searching your projects.
Choose Load to load the data from the selected file. Theremaining dialog boxes will display parameters from thefile.
2. Choose Next.
Load Settings
Choose the Load settings command button in the Source and Target
dialog box to use Whittle export settings from a saved file.
1. In the File name dialog box, find the folder containing the Whittle
settings file you wish to load.
2. Highlight the .WHS file name.
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Modelling Chapter 11: The Block Menu
3. Choose Open.
Select Economic Models Dialog Box
Using the Choose model button in the Source and Target dialog box
brings up this dialog box, where you can select the models you wish to
export to Whittle 3D.
The economic value of each block exported to Whittle will be the sum
of all models in the grid, each multiplied by its corresponding weightfactor.
Select E conomi c Model s di al og box
1. Use the [Insert] key or down arrow to add rows and the [Delete] key
to remove rows. Choose the Add all economic models in all folderscommand button to create rows for all economic models in your
project.
2. Choose the browse button [] in any row to bring up a Choose
Model dialog box, where you can select the economic model you
wish to place in that row.
3. You can vary the relative contribution of each economic model. For
each row, enter a Weight factor. The default is 1.00.
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Section IV: Modelling Menus Gemcom for Windows
4. Choose OK.
Define SubRegions and Slope Angles
In the SubRegions and Slope Angles dialog box, you can create sub
regions for exporting data to Whittle 3D. You can define slope angle
parameters for use in defined subregions. See the Whi tt l e 3DU ser
Manua lfor detailed explanations of these input parameters
Sub-Regions and Sl ope An gles di al og box
1. In theSubRegionsgrid text box, you can divide your projectgeometry into sub regions. Subregions are important for pitoptimization when geological and structural characteristics differ
over the extent of your property. Use the [Insert] key or down arrow
to add rows and the [Delete] key to remove rows. For each row,
enter the following data:
Minimum and maximum limits. Enter the inclusiveX(column),Y(row) and Z( level) indices which bound the subregion.
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Modelling Chapter 11: The Block Menu
Number of planes. Enter the maximum number of benchesover which a structure arc may extend in the subregion, with
a minimum of 2. Typical values range from 8 to 12. A higher
value will give more accurate slope modelling but will takelonger to run.
Default waste. Enter a value of zero or less to represent thecost of mining a waste block when Whittle 3D encounters a
block that has not been assigned a value in the economic
model. (Within the subregion, this value replaces the waste
value defined in the General Data and Mining Phases dialogbox.)
2. Use the Check subregion overlap button to verify that sub-regions
do not overlap. You will not be able to proceed to the next dialog
box until overlaps are resolved.
3. In theSlope Anglesgrid text box, you can define slope angles todefine the pit slope characteristics in each subregion. Use the
[Insert] key or down arrow to add rows and the [Delete] key to
remove rows. Use the Sort slope angles by subregion ID button to
regroup slope angles according to the sub-region to which they are
assigned. For each row, enter the following data:
SubRegion ID. Enter the number of the subregion whichwill utilize this slope angle. Each subregion must employ atleast one slope angle.
Azimuth. Enter the bearing along which the given slope anglewill apply, measured clockwise in degrees from the positive Y
(alongrow) direction. The given slope will apply to walls at
right angles to this azimuth.
Slope. Enter the required pit slope angle in degrees from thehorizontal (50 is steeper than 40.)
4. Choose Next.
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Section IV: Modelling Menus Gemcom for Windows
Define General Data and Mining Phases
In the General Data and Mining Phases dialog box, you can define
mining phases and specify flags for exporting air and waste blocks toWhittle 3D.
Gener al D ata and M i ni ng Phases di al og box
1. In the General Data and Mining Phases dialog box, enter the
following data:
Active blocks. Choose the set of blocks to consider when
optimizing the pit: All blocks considered (the usual choice), Onlyblocks within sub-regions, or Only selected blocks from the economic
model.
Waste blocks default value. Enter a value of zero or less torepresent the cost of mining a waste block when Whittle 3D
encounters a block that has not been assigned a value in the
economic model.
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Modelling Chapter 11: The Block Menu
Air flag A. Choose from Air blocks NOT used in the optimization(the usual, faster, choice), or, in very steep terrain which is
steeper than your mining slopes, Air blocks used in the
optimization.
Air flag B (in the result file). Choose from No air blocksincluded (the usual choice), or All air blocks within pit shell included
or All air blocks in the economic file included.
See theWhi tt l e 3DU ser M anualfor detailed explanations of these
input parameters.
2. In theMining Phases grid text box, you can define the lowestbenches to be considered for up to 20 mining phases. Use the
[Insert] key or down arrow to add rows and the [Delete] key to
remove rows.
For each phase, choose the Lowest bench number. (The
bench description will consist of the level description assignedusingBlock}}Create }}Create/Edit Block Model Project.)
3. Choose Next.
Summary
In the Summary dialog box, you can verify export parameters, specify
trace blocks, and complete the process for exporting data to Whittle
3D.
1. In the Summary dialog box, enter the following parameters:
Use trace blocks. Check this box to use trace blocks to trackthe export process.
I f you checked t he box, ent er th e foll owi ng data : Enter theColumn,Row, and Level coordinates for each
desired trace block in the grid text box. Use the [Insert] keyor down arrow to create new rows.
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Section IV: Modelling Menus Gemcom for Windows
Only export trace blocks. Check this box to only export
the trace blocks. Uncheck the box to export all blocksspecified in previous dialog boxes.
2. Verify the export parameters on the Input tab. Use the scroll barsto see the entire report.
3. I f you w i sh to save the in put summar y to a fi l e, choose Save
summary. Follow the instructions under Save Summar ybelow.
4. I f you w i sh to save th e expor t sett i ngs to a fi l e, choose Save settings.
Follow the instructions under Save Summar ybelow.
5. Choose Start export. Status will be updated as the export
progresses. SeeRunt i me informat i onbelow.
6. You will be informed if the destination files will overwrite existingfiles. ChooseYes to proceed.
Summar y dial og box
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Modelling Chapter 11: The Block Menu
7. When export is complete, verify the export parameters on the
Output tab. Use the scroll bars to see the entire report.
8. I f you w ish to save the out put summar y to a fi l e, choose Savesummary. Follow the instructions under Save Summar ybelow.
9. Choose Finish.
10. I f you d i d n ot save your sett i ngs, you will be asked to confirm that
you wish to exit the dialog box, chooseYes or No.
Runtime Information
When you choose Start export on the Summary dialog box, the Runtime
Information dialog box will appear, keeping you informed as to the
progress of the export processing.
1. I f you w i sh to in ter r upt pr ocessi ng:
Choose Cancel; then,
ChooseYes to terminate processing or No to resume.
2. To speed processing by reducing the amount of status information
displayed, uncheck the Show detail box.
Save Settings
Choose the Save settings command button in the Summary dialog box
to save the export settings to a text file for future reference.
1. In the File name dialog box, choose the folder in which to save thesettings.
2. Enter the file name. It will automatically carry an .WHS suffix.
3. Choose Save.
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Section IV: Modelling Menus Gemcom for Windows
Save Summary
Choose the Save summary command button in the Summary dialog box
to save the export summary to a text file for future reference.
1. In the File name dialog box, choose the folder in which to save the
summary.
2. Enter the file name. It will automatically carry an .TXT suffix.
3. Choose Save.
Import from Whittle 3D
Choose this command to import optimized pit designs from Whittle 3D
as surface elevation grids.
I mport fr om Wh it t l e di alog box
1. ChooseBlock}}Utils }}Import from Whittle 3D
2. In the Import from Whittle dialog box, chooseLoad settings and
follow the instructions below under L oad Sett i ngsto use previously
saved import parameters,
Or ,
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Modelling Chapter 11: The Block Menu
Enter the following data:
Automatically loop through result file. Check this box to
retrieve the pit numbers when a result fi le is loaded. Uncheckit to load the file without looping.
Whittle result file. Enter the path and name of the .RESWhittle result file containing the data you wish to importas a SEG, or use the browse [] button to invoke the Browsedialog box for searching your projects.
I f you d i d not opt to loop automat icall y, choose the Get numberof Whittle pits command button after you load the file.
Surface elevation grids.
Block folder. Choose the folder containing the elevationmodel which will contain the grids you wish to import.
Elevation model. Choose the elevation model in theselected folder which will contain the grids you wish toimport.
Top SEG. Choose the name of the top SEG from among thosedefined in the selected elevation model. This will be usedfor topographic surface clipping of the Whittle pits.
Whittle parameter file. Enter the path and name of the .MPAWhittle parameter file containing the data you wish to use to
create the imported SEG, or use the browse button [] to invoke
the Browse dialog box for searching your projects
Whittle pit surface elevation grids. Enter the following
data to characterize the pits to be imported.
Description. Enter text which will be appended as a pref ixto the description ofever y sel ected pi t. You can select anddeselect pits to add varying descriptions, but any edits tothe description will apply to all selected pits.
Pit. Check the box alongside the pit number to select the
pit for description editing or import. Uncheck the box toprevent editing the description or importing the pit.
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Section IV: Modelling Menus Gemcom for Windows
3. I f you w i sh t o save the impor t par ameter s to a fi l e, choose Save
settings. Follow the instructions under Save Sett i ngsbelow.
4. Choose Start import.
Load Settings
Choose the Load settings command button to use Whittle import
settings from a saved file.
1. In the File name dialog box, find the folder containing the Whittlesettings file you wish to load.
2. Highlight the .WHS file name.
3. Choose Open.
Save Settings
Choose the Save settings command button to save the import settings to
a text file for future reference.
1. In the File name dialog box, choose the folder in which to save the
settings.
2. Enter the file name. It will automatically carry an .WHS suffix.
3. Choose Save.
Export to Whittle 4D/4XChoose this command to export economic block model data in a format
which can be used by Whittle 4D/4X pit optimization software. A series
of dialog boxes will guide you through the export process.
1. ChooseBlock}}Utils }}Export to Whittle 4D/4X.
2. I f th e block m odel i s not r egul ar, a status box will appear, warningyou that Whittle export processing will not proceed. Use Block
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Modelling Chapter 11: The Block Menu
}}Create }}Create Edit Block Model Project to define regularlevel heights.
3. Define the Whittle export parameters in the following series ofdialog boxes. You may choose Back to return to a previous dialog
box.
See theWhi tt l e 4D/ 4XUser M anualfor more details on input data.
Define Target and Source Data
In the Target and Source dialog box, you can choose the data to export
to Whittle and the names of destination files.
Tar get an d Sour ce di al og box
1. In the Target and Source dialog box, choose Load settings and follow
the instructions below under L oad Sett i ngsto use previously saved
export settings,
Or ,
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Enter the following parameters:
Whittle model file. Enter the path and name of the .MOD
model file you wish to write, or use the Browse button to invokethe Browse dialog box for searching your projects.
Choose Load settings to load data from a settings file. The
remaining dialog boxes will display parameters from the file.
Whittle 4D/4X. Activate the appropriate radio button,depending on whether you wish to Export to Whittle 4D or Export
to Whittle 4X.
Top SEG.
Folder. Choose the folder containing the elevation modelwhich contains the top SEG.
Model. From the elevation models in the selected folder,choose the model which contains the top SEG.
Name. Choose the SEG which is to be the top SEG.
Select source blocks. Depending on which blocks you wish toexport, activate the radio button alongside All blocks in model,
Blocks within the current selection, or Blocks outside the current
selection.
I f you d i d n ot choose to export al l bl ocks, choose the followingSpecial blocks for export, if desired:
Include air blocks above top SEG. Check the box toexport all air blocks lying above the top SEG regardless of
whether they fall within the selection. Include all blocks intersecting surface topography.
Check the box to export all blocks intersecting the top SEGregardless of whether they fall within the selection.
2. Choose Next.
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Modelling Chapter 11: The Block Menu
Load Settings
Choose the Load settings command button in the Target and Source
dialog box to use Whittle export settings from a saved file.
1. In the File name dialog box, find the folder containing the Whittle
settings file you wish to load.
2. Highlight the .WHS file name.
3. Choose Open.
Define Metal and Rock Data
In the Metal and Rock dialog box, you can choose the grade and rock
type data to export to Whittle.
M etal and Rock d ia log box
1. In the Metal/Grade box, choose the [Insert] key or down arrow tocreate a new row.
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2. Choose the browse button [] to bring up a Choose Model dialog
box, where you can select the grade model you wish to place in that
row. Models from the same folder will be assigned the same parcel
index.
3. Enter the following parameters:
Product factor. Enter a factor to multiply by grade content toyield product units. The default is the factor specified in the
model definition, but you can alter it here. This factor can be
used to generate equivalent grades.
Threshold. Enter a minimum grade value for the specifiedmodel. I f all grade values for all models with a given parcel
index fall below their respective thresholds, the block will be
considered waste for that parcel.
4. Repeat Steps 1 to 3 for as many grade models as desired.
5. Each Gemcom rock code defined for the project appears on a
separate row in the rock code box, listed by numeric block model
rock code. For each row, enter the following data:
Select. Check the box to export ore or waste blocks with thegiven block model rock code to Whittle or uncheck the box to
exclude export of blocks with the given rock code.
Whittle code. Enter a four character rock code to be used inWhittle processing to represent the given block model rock
code.
6. Choose OK.
Define Positional CAF Data
In the Positional CAF dialog box, you can choose cost adjustment
factors that take into account the effect of the block location on the
cost of mining and processing ore. CAF data can be contained in a block
model and/or further adjusted by explicitly entering values on a
bench-by-bench basis. All cost adjustment factors are multiplicative.
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Modelling Chapter 11: The Block Menu
Posi t i onal CAF di al og box
1. Enter the following data:
Use block model for mining CAF. Check the box if you wish
to use a block model to supply mining cost adjustment factors;otherwise, uncheck the box.
I f you checked t he box, enter the following data:
Block folder. Choose the folder containing the modelwhich contains the mining CAF data.
Block model. From the models in the selected folder,choose the model which contains the mining CAF data.
Use block model for processing CAF. Check the box if youwish to use a block model to supply processing cost adjustment
factors; otherwise, uncheck the box.
I f you checked t he box, enter the following data:
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Section IV: Modelling Menus Gemcom for Windows
Block folder. Choose the folder containing the modelwhich contains the processing CAF data.
Block model. From the models in the selected folder,choose the model which contains the processing CAF data.
Adjust by level. Check the box if you wish to enter costadjustment factors on a level by level basis instead of or in
addition to block model CAF data; otherwise, uncheck the box.
I f you checked t he box, enter the following data for all relevant
levels:
Mining CAF. Enter a cost adjustment factor by which tomultiply the mining costs (and any other mining CAFs) onthis level.
You can choose theSet all mining CAF to 1.0 button to reset allentries to unity. You can choose the Autoset mining CAF
button to set multiple entries in a simple progression (seeAutoSet CAFbelow.)
Processing CAF.Enter a cost adjustment factor by whichto multiply the processing costs (and any other processingCAFs) on this level.
You can choose theSet all processing CAF to 1.0 button to resetall entries to unity. You can choose the Autoset processingCAF button to set multiple entries in an arithmeticprogression (seeAutoSet CAFbelow.)
2. Choose Next. You cannot proceed until you check bothAdjust byblock model check boxes and / or Adjust by level.
AutoSet CAF
When you choose Autoset mining CAFor Autoset processing CAF in the
Positional CAF dialog box, this dialog box will appear.
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I npu t Par ameter s for Au toGener ati ng Posi t i onal CAF di al og box
1. Enter the following parameters:
Start level. Enter the first level you wish to adjust.
Stop level. Enter the last level you wish to adjust.
Adjustment. Enter the desired CAF for the start level.
Offset. Enter a value to be added to the adjustment for levelssubsequent to the start level (or subtracted for preceding
levels.) This value can be positive, negative or zero.
The table below shows the effect these parameters have on CAF.
Level Start level= 5
Stop level= 8Adjustment=2Offset= 0.2
Start level= 5
Stop level= 8Adjustment=2Offset= -0.2
Start level= 8
Stop level= 5Adjustment=2Offset= 0.2
Start level= 8
Stop level= 5Adjustment=2Offset= -0.2
5 2 2 1.4 2.6
6 2.2 1.8 1.6 2.4
7 2.4 1.6 1.8 2.2
8 2.6 1.4 2 2
2. Choose OK.
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Section IV: Modelling Menus Gemcom for Windows
Summary
In the Summary dialog box, you can verify export parameters, specify
trace blocks, and complete the process for exporting data to Whittle4D/4X.
Follow the procedures described under Summaryin theExpor t to
Whi t t l e 3Dsubsection above.
Import from Whittle 4D/4X
Choose this command to import optimized pit designs from Whittle
4D/4X as surface elevation grids.
1. ChooseBlock}}Utils }}Import from Whittle 4D/4X.
2. Follow the procedures described above under Im por t f r om Whi t t le3D.
Create SEG from Surface
Choose this command to convert a Gemcom surface into a SEG.
1. ChooseBlock}}Utils }}Create Surface from SEG.
Cr eat e SEGfr om Sur face di al og box
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Modelling Chapter 11: The Block Menu
2. In the Create SEG from Surface dialog box, enter the following
data:
Folder. Choose the folder containing the elevation modelwhich will contain the new SEG.
Model. F rom the elevation models in the selected folder,choose the model which will contain the new SEG.
Name. Enter a name for the new SEG.
Options.
Background elevation. Enter an elevation to assign to allgrid cells falling outside the surfaceTI N boundaries.
Integration level. Enter the level of integration (from 1 to99) to find the cell elevation. Gemcom calculates anelevation for each grid cell using an elevation from theTI Nat one point (usually the middle) or an average of manypoints inside the cell. The number of points averaged is thesquare of the integration level.
3. Choose OK.
Create Surface from SEG
Choose this command to convert a SEG into a surface. This is useful
when calculating volumes/grades between surfaces.
1. ChooseBlock}}Utils }}Create Surface from SEG.
2. In the Create Surface from SEG dialog box, enter the followingdata:
Folder. Choose the folder containing the elevation modelcontaining the SEG you wish to convert.
Model. F rom the elevation models in the selected folder,
choose the model containing the SEG you wish to convert.
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Section IV: Modelling Menus Gemcom for Windows
SEG to use. From the list ofSEGs in the selected elevationmodel, choose the one you wish to convert
3. Choose OK.
4. In the Solid Attribute Definition dialog box, enter these details:
5. Choose OK. Then, be sure to validate the surface you create.
Enter a name forthe surface (up to3 parts). Gemcom
adds a .BT2 suffix.
Select Surface.
TIN panels canbe transparent inrendered mode.
Enter the drive and path where you want thesurface stored. It will automatically be placed in a
Select a colourfor the surface.
TINs can besmoothed inrendered mode.
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