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Process Help REGMOD - produce a regular celled block model suitable for pit Optimization |
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Process Name |
Menu Path |
Link to Command Table |
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REGMOD |
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Introduction
Produces a regular cell model from any type of Datamine ore body block model.
The parameters for the output regular cell model are taken from the prototype model &IN1. The model to be converted is &IN2. The regular model is output to &OUT.
How to use
The prototype model may be constructed by using the PROTOM process. Any number of cells and any cell size may be chosen; REGMOD computes a weighted average of all input cells and sub-cells falling within the new cell size. However, it is better to choose a multiple or sub-multiple of the input cell size whenever possible, with the new origin chosen so that as many cell boundaries coincide between the old and new models as possible.
The output model will usually have larger cells than the input. However, REGMOD will also allow the input model to be divided into smaller cells, if required. Note however that values are always output for whole cells only; sub-cells will not exist in the output model.
The output model will contain two extra fields; FILLVOL, which is the total volume in the output cell filled by cells and sub-cells in the input model; and VOIDVOL, which is the total cell volume minus FILLVOL, or the total volume of the output cell which was not covered by cells and sub-cells.
Up to 25 numeric fields from the input model are averaged and placed in the output model. These
fields are specified as field names *F1 to *F25. Averaging is by volume weighting. There must
be at least one numeric value field in the input model (*F1).
It should be noted that absent grade values are treated as ZERO when regularizing. For example if a cell is divided into two equal subcells of volume 500 each and the AU value in one subcell is 1, and - (absent data) in the other, then the regularised AU value over the parent cell is calculated as 0.5, the FILLVOL as 1000 and the VOIDVOL as 0.
However if the subcell with absent data is removed, leaving just one subcell, then the regularized AU value is 1, the FILLVOL is 500 and VOIDVOL is 500.
This treatment of absent data values has been designed specifically for calculating the revenue value of a cell in the regularized model, using a process such as EXTRA. For example if the revenue for a unit of AU is $100 then the dollar value is calculated as:
revenue = FILLVOL x grade x $value
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Case 1: revenue = 1000 x 0.5 x 100 = 50,000
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Case 2: revenue = 500 x 1.0 x 100 = 50,000
If REGMOD is used for other purposes then the implication of this treatment of absent data grade values should be considered carefully.
Files, Fields and Parameters
Input Files
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Name |
Description |
I/O Status |
Required |
Type |
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IN1 |
Input model prototype file, defining the new model origin, number of cells and cell sizes. This is typically set up by process PROTOM or create-model-prototype. |
Input |
Yes |
Block Model Prototype |
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IN2 |
Input model file for conversion. This must have the fields XMORIG, YMORIG, ZMORIG, NX, NY, NZ (implicit) and IJK, XC, YC and ZC (explicit). XINC, YINC and ZINC must exist as either explicit (sub-cells permitted) or implicit (no sub-cells). There must also be at least one explicit numeric data field, to be specified as F1. The records may be in any order, but speed is increased if they are in IJK order. |
Input |
Yes |
Block Model |
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FIELDLST |
File to supply selected fields. |
Input |
No |
Undefined |
Output Files
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Name |
I/O Status |
Required |
Type |
Description |
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OUT |
Output |
Yes |
Block Model |
Output model file. This will have the model parameters of the input prototype file on IN1 , and may contain up to twenty five averaged fields ( F1-F25). It will also contain the fields FILLVOL and VOIDVOL. |
Fields
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Name |
Description |
Source |
Required |
Type |
Default |
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F1 |
First explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F2 |
Second explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F3 |
Third explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F4 |
Fourth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F5 |
Fifth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F6 |
Sixth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F7 |
Seventh explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F8 |
Eighth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F9 |
Nineth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F10 |
Tenth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F11 |
Eleventh explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F12 |
Twelfth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F13 |
Thirteenth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F14 |
Fourteenth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F15 |
Fifteenth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F16 |
Sixteenth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F17 |
Seventeenth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F18 |
Eighteenth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F19 |
Nineteenth explicit numeric field to be averaged. F6 to F25 may also be specified. |
IN2 |
No |
Any |
Undefined |
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F20 |
Twentieth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F21 |
Twenty-first explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F22 |
Twenty-second explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F23 |
Twenty-third explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F24 |
Twenth-fourth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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F25 |
Twenty-fifth explicit numeric field to be averaged. |
IN2 |
No |
Any |
Undefined |
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FIELDNAM |
Field in FIELDLST to identify selected fields. |
FIELDLST |
No |
Character |
Undefined |
Parameters
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Name |
Description |
Required |
Default |
Range |
Values |
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>=2 display for each input cell or sub-cell that intersects with an output model cell; IJK1,IJK,NUMMET,XC,YC,ZC,VOLP,VOLT,F1 [IJK of input and output cell, sub-cell no., input cell centre, volume intersected, total volume to date in output cell, F1 value] and for each output cell, IJK, FILLVOL and VOIDVOL values, and the F1 value. (0). |
No |
0 |
0,2 |
0,1,2 |
Notes
No additional notes.
Example
!REGMOD &IN1(PROTMODL),&IN2(OLDMODEL),&OUT(LGMODEL),*F1(DOLLARS)
Error and Warning Messages
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Message |
Description |
Solution |
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>>> NO NUMERIC FIELDS TO ACCUMULATE. |
One or more of the given field names (*F1-*F25) did not exist, or were implicit, or not numeric. Fatal; the process is exited. |
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>>> ERR 122 <<< ( n) IN REGMOD |
One or more of the essential fields in either the prototype
or input model file was absent. |
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