Drill Pattern Designer · Lattice

The shape to be blasted, and which way the rock is meant to go.

Along the face m The length of the free face this shot presents.

Back from the face m How far the dig goes into the rock.

Face bearing ° from N The direction the rock is meant to move, not the strike of the face.

Edge standoff m No collar closer than this to the boundary.

Collars where they will be drilled, toes where they will finish.

The burden on the plan is measured at the crest. The burden that has to break is at the toe.

Findings, not a score. Each one names the number and what would change it.

Collar and toe coordinates, depth, dip and azimuth — the drill plan, as a table.

at the collar

Hole diameter mm

Bench height m

Burden m

Spacing m

Pattern

Subdrill m

Subdrill measured A driller counts rods; a surveyor picks up a toe. On an angled hole they are different numbers for the same hole.

Hole angle ° from vertical

Collar RL m

Face batter ° from horizontal Ninety is a vertical face. Anything less puts the face toe out in front of its crest.

one column, no decks yet

Stemming m

Explosive density g/cc

Rock density t/m³

from the shared engine