- SHOTPlus™ Variant:
- Surface
- Version:
- 6.14.13 (Beta) and 6.14.2 (Production).
- KBA Summary:
- This Knowledge Base Articles (KBA) describes the different Volume Calculation modes in SHOTPlus™ and their effect on different parts of the application.
Background
SHOTPlus™ calculates volume on a hole-by-hole basis. These calculations are done concurrently with user inputs, to ensure that the correct volume is reported. For SHOTPlus™ files with a large number of holes, these calculations can be significantly computationally intensive and can impact the responsiveness of the application.
SHOTPlus™ enables three different modes for these concurrent volume calculations, so that when users are conducting tasks that don't require high precision volume calculations, the mode can be changed to improve performance of the application. These modes are:
- Design Hole Dimensions - least computationally intensive.
- Collar Voronoi - moderately computationally intensive.
- Full Hole Voronoi - most computationally intensive.
Calculation Mode Formula and Uses
This mode uses the Hole Type 'Default' Burden and Spacing to define the area for each hole. This area is then used to calculate the volume for the hole.
Hole Area Formula
Hole Collar Area = 'Hole Type Default Burden' x 'Hole Type Default Spacing'
Where:
- 'Hole Type Default Burden' = 'Default' Burden defined for the hole type in 'Edit' > 'Design Data'.
- 'Hole Type Default Spacing' = 'Default' Spacing defined for the hole type in 'Edit' > 'Design Data'.
Hole Volume Formula
Hole Volume = Hole Collar Area x h
Where:
- h = Collar Z - Grade Z.
- If Grade Z = 'null' then h = Collar Z - Toe Z.
The least computationally intensive volume calculation mode The Design Hole Dimensions mode should be used when the following circumstances are met:
- All holes are vertical.1
- The Default Burden and Default Spacing for each hole type has been correctly configured.
- The Burden and Spacing of Blastholes added to the plan reflects the Default Burden and Default Spacing as defined in Design Data.
- Blastholes do not have 'Drilled' or 'Measured' data, or users are only interested in 'Design' Volumes.2
Information
- Design Hole Dimensions mode can be used where holes are not vertical, however the accuracy of the calculation will be affected where angled holes are present.
- Design Hole Dimensions mode calculates 'Design' volumes only.
This mode uses a modified Voronoi Tessellation to calculate the Hole Collar Area for each hole. This area is then used to calculate the volume for each hole.
Hole Volume Formula
Hole Volume = Hole Collar Area x h
Where:
- Hole Collar Area = A hole's collar area calculated using voronoi tessellation.
- h = Collar Z - Grade Z.
- if Grade Z = 'null' then h = Collar Z - Toe Z.
The default mode for new, files. More computationally intensive than the Design Hole Dimensions volume calculation mode. The Collar Voronoi mode should be used when the following volume circumstances are met:
- All holes are vertical.1
- When working with files with a large number of holes.
Information
- Collar Voronoi mode can be used where holes are not vertical, however the accuracy of the calculation will be affected where angled holes are present.
This mode uses a modified voronoi tessellation to calculate the Hole Collar Area and the Hole Toe Area for each hole. The average of these two areas is then used to calculate the volume for each hole. This is also the mode used by BlastIQ™ Insights to calculate hole volumes.
Hole Volume Formula
Hole Volume = ((Hole Collar Area + Hole Toe Area)/2) X h
Where:
- Hole Collar Area = Collar area calculated using Voronoi Tessellation.
- Hole Toe Area= Toe area calculated using Voronoi Tessellation.
- h = Collar Z - Grade Z.
- if Grade Z = 'null', then h = Collar Z - Toe Z.
The most computationally intensive volume calculation mode. Should be used when other volume calculation modes are not suitable. When working with SHOTPlus™ files with a large number of hole and not working specifically with volumes, users can switch between 'Full Hole Voronoi' and either the 'Design Hole Dimensions' or 'Collar Voronoi' modess to improve application performance if required.
Impact
The volume calculation mode selected, will effect the volumes reported by SHOTPlus™ in the following areas of the application:
- Analytics View.
- Volume Overview.
- Reporting.
- Blast Summary Block.
The mode selected in SHOTPlus™ DOES NOT affect how volumes are reported in BlastIQ™.
Selection
Users can select which volume calculation should be used for each file, by:
- Selecting their preferred mode from the down dialog on the toolbar; or
- Selecting Edit > Blast Properties from the main menu, then selecting Volume calculations from Edit Blast Properties dialog sidebar, and selected their preferred mode volume calculation modes.