modeling blast movement for grade control - · pdf filemodeling blast movement for grade...
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Classification Analysis
1515
South Pit North Pit
An, Di An, Di, Do An, Di, Do Di, Do
Echelon Center Lift
Assign Movement Direction to each Pre-Blast Voxel and Post-Blast Grid Node
Add a random component to each pre-blast voxel direction at time of simulation
Simulate Blast Movement 1. Randomly select a pre-blast voxel. 2. Draw a random distance from the distribution of
voxel horizontal movements. 3. Add a random component to the voxel movement
direction. 4. Calculate the destination grid node in the post-
blast enevelope. 5. Move the pre-blast voxel to the post-blast grid
node if vacant. 6. Continue steps 1 – 5 until all post blast grid nodes
are occupied.
Simulate blast movement
Post-Blast Tonnes = Pre-Blast Tonnes
Post Blast-Volume = 1.38 x Pre-Blast Volume
Post-Blast Grade = Pre-Blast Grade
Post-Blast Model Topo = Surveyed Post-Blast Topo
Recoverable Ounces Au
Recoverable pre-blast oz Au = 14,241
Recoverable post-blast oz Au = 14,169
Loss = 72 oz Au
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