Relimiting Destination Solids

Relates to versions - 1.6.3+

 

Introduction

The Relimit Solids tool provides the ability to recut your solids on an imported grid or triangulation. It is designed to provide quick results and clean solids.

This tool can be applied to both Deposit and Destination solids. This guide focuses on the Destination solids

Setting Up The Destination Table

Creating Fields

Accessing The Relimit Solids Tool

Relimiting Options

Global Options

Relimit Mode

• Choose between Remove above (all solids/volumes above the surface will be removed) and Remove Below (all solids/volumes below the surface will be removed)

Surface

• Choose your grid or triangulation to compare your solids against
• If you cannot find the surface you are looking for, make sure you have imported the surface into your Design Data.

Range

• You can apply the Relimit Solids tool to an Inline Range or select from a picked / text Range that was created prior. This will limit the nodes which the Relimit Tool is applied to.

Clear Selected Fields

• Checking this option will clear data from the fields being populated before the results of the scan are written to them. This will be filtered on the range applied in the step above.

Export Only Modified Solids

• In order to reduce the number of solids in your model, it is recommended that you check this option. Only those solids that are intersected by your surface will be exported to your selected Relimited Sold Field

Upper and Lower Clamps

• Clamp values instruct the Relimit Solid tool how to behave when it encounters a solid that is very close to being either completely above the scanned surface, or completely below. The effect of this to eliminate very small remaining values
• Using an upper clamp of 95.00% means that if a scanned solid is at least 95% remaining after relimiting, it is treated as 100% remaining (full solid)
• A lower clamp of 5.00% will treat any solid less than 5% remaining after relimiting as 0% reamining (no solid)

Note, the behaviour of the clamps does not change if you are removing material above or below a surface, as it refers to percentage of the original solid that remains post relimit.

Solid Options

• In the lower left of the window, select the Solid Fields you want to compare against your surface. Make sure the box next to the solid is checked.

• You can select multiple solids to compare against a single surface. If you do, you should create a separate set of fields to hold the data from each scanned solid.

Exporting Results

• In the columns to the right select the fields you wish to export data to for each solid compared against your selected surface.

• Each column header identifies what results will be assigned to the selected field, e.g. Relimited Volume or Relimited Solid.

Using Results

• After populating your fields with the results of the Relimit Solids scan, create a Scheduled Volume field that you will input into your scenario

Imported Volume vs Relimited Volume

• The Relimit Solids tool calculates its own volume of the scanned solid before comparing it against the selected surface. This calculated volume may differ from your original imported volume.

• You have the option to use your Relimited Volume or your Imported Volume (with adjustments) as your Scheduled Volume. In either case you will need to create a calculated field to store this data.

If you wish to use your Imported Volume, create a calculated field which multiplies your original volume against the Percentage Remaining of your scanned solid.

• We do this so that volumes on nodes that are not relimited are not multiplied by zero.

• The expression will be similar to the following, depending on your folder naming:

GetValue(ImportedVolume)*(1-(GetValue(RelimitDataPercentageRemoved)))

If you wish to use your Relimited Volume your expression will be similar to:

If(GetValue(RelimitDataRelimitedVolume)>0, GetValue(RelimitDataRelimitedVolume), GetValue(ImportedVolume))

• This expression will return your Relimited Volume on nodes where it is greater than zero, otherwise it will use your Imported Volume.

Linking Results To A Scenario

• In your Scenario Settings tab, set your Destination Capacity Field to your new Scheduled Volume field. Your Destination Centroid Field can remain the same.

Linking Results To A Scenario: Solids

• You now have two sets of solids: Imported Solids and Relimited Solids.
• You will likely have some nodes with an Imported Solid and a Relimited Solid, and some nodes with only an Imported Solid.
• This can be the result of checking the Export Only Modified Solids box, setting a scan range or selecting a surface that does not completely cover your Destination Solids.

• To ensure you schedule all available Destination material and can see all your solids, set your Relimited Solids as your Destination Solids Field and your Imported Solids as your Alternate Solids Field.
• The Relimited Solid will be used when a leaf node has both solid types. The Imported Solid will be used in cases where the node has only an Imported Sold.

Initial State and Relimited Solids

• It is highly recommended that once you begin using the Relimit Solids tool that you only use the Initial State tool to preschedule 100% of a node's material.
• As an example: A block of 10,000 lcm that is prescheduled by 50% prior to using the Relimit Solids Tool, has an adjusted volume of 5,000 lcm.
• Relimiting your solid so that your initial volume is 8,000 lcm, prescheduling by 50% will then reduce your final volume to 4,000 lcm.

Three Field Setup

The setup above works as follows:

• Intitial State Scan - This field stores any scans made using the Initial State Calculator
• Initial State Scan Check (calculated field) - Filters the stored scan so that only records that are completely removed by the scan are kept.
• Prescheduled material. Select this field as your Destination Initial Percentage Filled Field in your Schedule Settings.

Expression for the Initial State Scan Check Field:

If(GetValue(RelimitDataPrescheduledInitialStateScan) ==1,1,0)

In your scenario, go to Settings > Initial State > Destination

• Your default field setup will be as above. If you want to use the Initial State Calculator to scan solids, replace the Scan Check field with the Initial State Scan field, run the scan, then set your Initial State Initial Value Field back to your Scan Check field.
• The " * (0%)" overwrites the values of any scans made using the Initial State Calculator which will interfere with the Relimit Solids tool. Subsequent lines should only be used to preschedule 100% of material.

Linking Results To A Scenario: Initial State

 

Troubleshooting

My Solids Are Not Appearing When I Run The Relimit Solid Tool Over Them!

Check your clamp values. You're likely trying to remove less material than allowed by your clamp vaue, and the solid is being treated as entirely above the scan. Reducing your Lower Clamp value will allow you to remove smaller volumes.

I Am Still Getting Solids (With Very Low Volumes) When it Says 100% Removed

Right click on the solid you expect to be removed entirely. Select Destination Node > Navigate to Table Destination. This will take you to the leaf node on your Destination table.

Check the value for the Relimited Percentage Removed field is 100%. Double-click the cell to see if your string formatting has rounded a slightly lower than 100% value.

If it has, click the lock icon at the top left of the screen and manually enter a 1 into the cell then reload your solids. It should now be completely removed.

I Am Using An Existing Preschedule, How Can I Preserve It And Use The Relimit Solid Tool?

As explained before, using preschedule percentage values that are not zero or one will cause issues when introducing the Relimit Solid tool to your reserves.

To maintain your preschedule in a way that carries the least risk, create a new Percentage type field, make it a calculated field with the expression:

If(GetValue(YourInitialStateFieldHere) == 1,1,0)

Then go to your scenario > Settings > Initial State > Destination and map this new field to your Initial State Initial Value Field.

Make sure that you then remove any line in your Initial State Path that erases your Initial Value Field. In the guide above, you would have been instructed to write the following line at the top of your path:

This method will not preserve your full preschedule, but is the best method for integrating a scan-based preschedule with the Relimit Solid tool.

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