REGMOD Process

• REGMOD Process
• • Introduction
  • Input Files
  • Output Files
  • Fields
  • Parameters
  • Example
  • Error and Warning Messages

To access this command:

• Model ribbon >>Manipulate >> Regularize.

• View the Find Command screen, select REGMOD and click Run.
• Enter "REGMOD" into the Command Line and press <ENTER>.

See this process in the Command Table.

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.

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

• Case 1: revenue = 1000 x 0.5 x 100 = 50,000

• 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.

Input Files

Name	Description	I/O Status	Required	Type
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
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
FIELDLST	File to supply selected fields.	Input	No	Undefined

Output Files

Name	I/O Status	Required	Type	Description
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

Name	Description	Source	Required	Type	Default
F1-F25	Explicit numeric fields to be averaged.	IN2	No	Any	Undefined
FIELDNAM	Field in FIELDLST to identify selected fields.	FIELDLST	No	Character	Undefined

Parameters

Name	Description	Required	Default	Range	Values
PRINT	>=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

Example

!REGMOD     &IN1(PROTMODL),&IN2(OLDMODEL),&OUT(LGMODEL),*F1(DOLLARS)

Error and Warning Messages

Message	Description
>>> 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.
>>> ERR 122 <<< ( n) IN REGMOD	One or more of the essential fields in either the prototype or input model file was absent. Fatal; the process is exited.