Process Help

DTMMOD - update and evaluate a block model using a DTM

 

Process Name

Menu Path

Link to Command Table

DTMMOD

Reserves ribbon | Report | Cut and Fill | Model

Click here

 

Introduction

 

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

 

This process allows the update and evaluation of a geological block model, based on an update wireframe surface or DTM.

How to use

Both cut and fill volumes will be separately evaluated. The output updated block model will have had the cut volume removed, and the fill volume added. It will also generate a separate block model of both the cut and fill volumes. It is assumed that the input block model does not contain air blocks i.e. the top blocks represent the current topography. This input block can also include a rotated model structure, which will be honored in the output cut/fill block model.

A supplied cut attribute field is used for the assignment of the cut and fill volumes. The user therefore supplies the name of this new (numeric) field, and what values will be assigned within 'cut' blocks and 'filled' blocks. This enables clear identification of cut and fill volumes, for both evaluation and plotting/display purposes. This facility also enables models to be progressively updated, and each time have an appropriate value assignment, e.g. a period assignment for stockpiling or waste dump purposes.

An optional perimeter file may also be supplied, to split the cut and fill volumes into separate regions for evaluation purposes. This allows the cuts to be evaluated in separate mining strips or partitions. These perimeters are treated as boundaries as viewed in an XY plan i.e. the elevations of the perimeters are ignored. If such perimeters are supplied, an optional attribute field can also be defined, to further divide the evaluation data as required.

A density field has to exist in the input block model, for use in tonnage calculation of the cut volume. A density value must also be supplied for the fill material, for use in the subsequent fill tonnage calculation. This value will also be placed into the density field of the output cut/fill block model.

The degree of accuracy is controlled by the supplied cell splitting parameter. This parameter is utilized in exactly the same manner as the SPLITS parameter in the TRIFIL process.

The output results file contains all the evaluated tonnages and volumes, split by cut, fill and perimeter attribute. This results file is automatically also written out as a .csv file, for easy import into spreadsheet programs.


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 update wireframe surface (DTM).

Input

Yes

Wireframe points

MODELIN

Original block model.

Input

Yes

Block model

PERIMIN

Optional input perimeter file controlling sub-division of cut-and-fill volumes.

Input

No

Perimeter file

Output Files

Name

I/O Status

Required

Type

Description

MODELOU

Output

No

Block model

Updated block model, with cut volume removed.

CUTMODOU

Output

Yes

Block model

Output block model of cut and fill volumes.

RESULTS

Output

Yes

Results file

Output evaluation results data file.

Fields

Name

Description

Source

Required

Type

Default

DENSITY

Density field in input block model.

MODELIN

Yes

Numeric

Undefined

CUTFLD

Output numeric field defining cut and fill volumes.

 

Yes

Numeric

Undefined

ATTRIB

Optional attribute field from input perimeter file.

PERIMIN

No

Any

Undefined

Parameters

Name

Description

Required

Default

Range

Values

FILLDEN

Density of filled volumes.

Yes

1

0,99999

 

SPLITS

Subcell splitting of cut and fill block model.

Yes

0

0,3

 

CUTVAL

Value assigned to CUTFLD for cells inside cut volume.

Yes

-1

 

 

FILLVAL

Value assigned to CUTFLD for cells inside fill volume.

Yes

1

 

 


Notes

No additional notes.


Example

!DTMMOD

&WIRETR(surftr), &WIREPT(surfpt),&MODELIN(blokmod), &PERIMIN(striper),&MODELOU(updmod),&CUTMODOU(cutmod), &RESULTS(cutres), *DENSITY(DENSITY),*CUTFLD(CUTFLD),*ATTRIB(STRIP), @FILLDEN=1.8,@SPLITS=2,@CUTVAL=-1,@FILLVAL=1

 

Input:

  • Block model below current topography

  • Wireframe of updated topography

  • Fill density

 

 

 

Output:

  • Block model of Cut and Fill Volumes

 

 

 

 

  • Block model without 'Cut' blocks and including 'Fill' blocks

 

 

 

 

  • Cut and Fill  evaluation results output as Datamine format and as .csv files

 


Error and Warning Messages

Message

Description

Solution