Process Help

PITMOD - create a pit model and evaluation

 

Process Name

Menu Path

Link to Command Table

PITMOD

Report ribbon | Report | Pit Reserves

Click here

Introduction

note.gif (1017 bytes)

This is a Superprocess and running it may have an effect on other Datamine files in the project. More...

 

Creates an in-pit model and allows a quick evaluation of an overall pit design.

How to use

An input DTM wireframe must be supplied, which represents the bottom surface of the ultimate pit design. An input geological block model must also be supplied. 

The results are automatically broken down by bench, taken from the block model cell height. An overall total evaluation is also determined and optionally the results can be reported by KEY field. The BENCH number reported refers to the 'base' of each bench.

Subcell splitting is controlled by the parameters @XSUBCELL, @YSUBCELL and @RESOL. At least one numeric grade field must be defined. No absent grade data is allowed. Blocks with absent grade data do not get processed.

  • The wireframe of the pit should be within the area of the block model prototype for the process to work correctly.

  • @ZORIG and @BHEIGHT parameters to be used to optionally define an alternative origin and bench height.

  • The process does not support rotated block models.

  • The advantage of using PITMOD over SELWF to select the blocks within a pit wireframe, is that the output model will have cell splitting where it meets the pit wireframe.

  • Absent grades are not allowed. If a grade is absent the default value is used. If the default value is absent zero is used.

  • The output results file contains the fields TOP_B, BOTTOM_B, MID_B which contain the elevations of the top, bottom and middle of each evaluated bench respectively.

Files, Fields and Parameters

Input Files

Name

Description

I/O Status

Required

Type

WIRETR

Triangle file of update wireframe surface (DTM).

Input

Yes

Wireframe triangle

WIREPT

Point file of pit wireframe triangulated surface.

Input

Yes

 

MODELIN

Block model for evaluation above wireframe.

Input

Yes

Block model

Output Files

Name

I/O Status

Required

Type

Description

MODELOU

Output

No

Block model

Block model portion inside pit.

RESULTS

Output

Yes

Undefined

Evaluation results data, by bench.

Fields

Name

Description

Source

Required

Type

Default

F1

Numeric grade field 1.

MODELIN

Yes

Any

Undefined

F2

Numeric grade field 2.

MODELIN

No

Any

Undefined

F3

Numeric grade field 3.

MODELIN

No

Any

Undefined

F4

Numeric grade field 4.

MODELIN

No

Any

Undefined

F5

Numeric grade field 5.

MODELIN

No

Any

Undefined

KEY

Key field - numeric.

MODELIN

No

Any

Undefined

DENSITY

Density field.

MODELIN

No

Any

DENSITY

Parameters

Name

Description

Required

Default

Range

Values

DENSITY

Default DENSITY value.

Yes

1

0,9999

 

XSUBCELL

Cell division in X direction (1). Max 20.

No

1

1,20

 

YSUBCELL

Cell division in Y direction (1). Max 20.

No

1

1,20

 

RESOL

Defines boundary resolution in direction perpendicular to plane of filling. =(0) - precise boundary location. = N - boundary rounded to nearest 1/Nth of parent cell size.

No

0

Undefined

Undefined

ZORIG

Specify an alternative bench origin.

No

0

Undefined

Undefined

BHEIGHT

Specify an alternative bench height.

No

0

Undefined

Undefined

Notes

No additional notes.

Example

!PITMOD

&WIRETR(pittr), &WIREPT(pitpt), &MODELIN(model), &MODELOU(pitmod),
&RESULTS(pitres), *F1(AU), @DENSITY=2.6, @XSUBCELL=3.0, @YSUBCELL=3.0, @RESOL=0.0

 

Input:

  • Pit wireframe

  • Resource model

 

 

 
Output:
  • Block model within pit

 

 

 

 

  • Bench-by-bench evaluation results output as Datamine format and as .csv files

 

Error and Warning Messages

Message

Description

Solution

>>> ERROR: Read error from file ffffffff

Read error from file specified as &IN. Fatal; the process is exited.

 

 

 

 

>>> ERROR: field aaaaaaaa is too long

Fatal; the process is exited.

 

 

 

 

>>> WARNING: Cannot append to file ffffffff. A new file will be created

Cannot append fieldnames to the file specified as &OUT. Check the file name given. A new &OUT file will be created.

 

 

 

 

 

>>> ERROR: Files have different DDs, cannot append

File specified in pattern matching expression and the file specified as &OUT have different DDs. Fatal; the process is exited.

 

 

 

 

>>> ERROR: Unexpected execution error

Fatal; the process is exited.

 

 

 

 

>>> ERROR: Illegal instruction found

Fatal; the process is exited.

 

 

 

 

>>> SYNTAX ERROR AT " "

Syntax of pattern matching expression is incorrect. Fatal; the process is exited.

 

 

 

 

>>> ERROR: Incompatible types for " " and " "

Field types are incompatible in relational expression. Fatal; the process is exited.

 

 

 

 

>>> ERROR: " " MATCHES ...

Alphanumeric field required

Alphanumeric field required for pattern matching expression. Fatal; the process is exited.

 

 

 

 

>>> ERROR: Illegal pattern:

Illegal pattern in pattern matching expression. Fatal; the process is exited.

 

 

 

 

>>> ERROR: More than nnnnn instructions

Maximum number of expressions is 100. Fatal; the process is exited.