The Blast Quality dialog answers two questions about a blast you have loaded: how consistent is it? and is anything filed in the wrong place?
It shows a distribution of any hole attribute you choose, and lists holes whose row assignment disagrees with where they actually sit. Open it from the Blast Quality button on the toolbar, beside Time Window.
It never changes your data. Nothing in this dialog edits a row, a position, a burden or a spacing — it measures and it points. Corrections stay your decision.
| Control | Purpose |
|---|---|
| Blast | Which shot to report on. Every loaded blast is listed, and a shot with contradictions carries its count in brackets — so the dropdown doubles as a summary of where the problems are. Hidden when only one blast is loaded. |
| Chart | Which attribute to plot. Sixteen are available (see below). |
The report always covers one blast at a time. Two shots pooled into one histogram produce a distribution that describes neither — a 2.6 m pattern and a 7 m pattern average into nonsense — and row numbers restart at 1 in every blast, so “row 26” is meaningless until the shot is named.
Several peaks usually means several design zones. A blast with a batter row, a buffer row and production holes legitimately carries three different spacings, and they appear as three separate peaks. That is the design, not a fault — and it is the main reason the chart is worth looking at.
A few details that make the chart honest:
Click any bar to highlight those holes on the 2D canvas and in 3D. Click a row in the list below to highlight that single hole. Close clears the highlight.
Refresh recomputes everything from the current holes — fix a row, press Refresh, and the finding disappears.
A hole is reported when the nearest hole in its own row is more than 4× further away than a hole in another row.
That is a contradiction between the row and the ground. A hole’s nearest neighbour should be in its own row — that is what a row means. When a hole sits 2 m from a hole in another row while its own row’s nearest member is 108 m away, the row assignment is wrong, and the burden and spacing calculated from it were measured across that gap.
Two things this deliberately does not do:
The numbers behind it are per-blast. Burden and spacing are always measured within one shot, so a neighbouring blast — however close — can never affect a hole’s figures or trigger a false report.
Geometry
| Chart | Notes |
|---|---|
| Spacing | Distance to the nearest hole in the same row |
| Burden | Distance to the nearest hole in another row |
| Nearest Neighbour | Distance to the nearest hole, full stop |
| Hole Length, Bench Height, Subdrill | Subdrill is signed — upholes chart below zero |
| Diameter, Angle, Bearing | Angle follows Kirra’s convention: 0° is vertical |
| Collar RL, Grade RL, Toe RL |
Nearest Neighbour is the most robust health measure here. Spacing and burden both depend on which row a hole was filed into, so a row mistake moves them. Nearest neighbour owes nothing to rows, ordering or bookkeeping — on a healthy pattern it sits at the smaller of burden and spacing, and a spread or a low tail is drilling reality.
Area
| Chart | Notes |
|---|---|
| Area (Cell) | The hole’s clipped Voronoi cell — its real area of influence |
| Cell ÷ B×S | Actual influence area ÷ design burden × spacing |
Cell ÷ B×S reads 1.0 when the design matches the ground. Below 1 is a clipped or crowded hole; above 1 is a hole carrying more ground than it was designed for. It needs a real burden and spacing on the hole, and reports nothing otherwise rather than returning a number that only looks like a ratio.
Both area charts need the shot ticked in Voronoi Options. Voronoi cells are only built for shots selected there. If the chart is empty it will tell you so — tick the blast, then Refresh.
Charging and measured
| Chart | Notes |
|---|---|
| Charge Mass, Powder Factor | Powder factor follows the blast’s selected volume method, so it matches the printed plan |
| Measured Mass, Measured Length | |
| Stemming | Total inert deck length |
Zero means “no data” for these. An uncharged hole or one never measured up is left off the chart rather than drawn at zero — otherwise every uncharged hole piles into a spike that buries the real distribution. An entirely uncharged blast shows an empty chart.