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Blast Movement Technologies
2 / 67 Bluestone Circuit
Seventeen Mile Rocks
Queensland, 4073 office@bmt.com.au
AUSTRALIA www.bmt.com.au 08/2017
Commodity Ore Grade Geology Powder Factor Location
Copper Low Grade**
Disseminated porphyry 1.2 kg/m3
North America
This North American open-pit mine produces copper and molybdenum.
 Drills and blasts 15 m benches, mined in a single pass
 Porphyry copper-molybdenum deposits
 Grade control method consists of blast hole assays that inform an ore control model
Unaccounted blast movement resulted in dilution
and ore loss
The BMM System accurately translated post-blast dig lines
 Poor reconciliation indicated ore loss and dilution were
a problem at the mine
 Blast movement was not considered to be a
contributing factor to dilution or ore loss given the
gradational nature of the ore body
 Blast movement monitors (BMMs) were installed in
monitoring holes throughout the shot
 Installation and detection as per site standard
operating procedures
 Blast was fired and movement monitored
 BMM Explorer software calculated new dig lines, and
areas of ore loss and dilution that would have occurred
without monitoring
Accounting for blast movement diverted 23,000 t of waste and recovered
15,400 t of ore—adding US$100,000 revenue in one blast
The mine generated an additional US$100,000 in this blast
by diverting waste from the mill and minimising ore loss
Significant movement occurs within all blasts. Variation of
±50% from the mean horizontal movement is common,
and occurred in this blast.
 Measured horizontal movement ranged from 1 to 11 m
(3 to 36 ft) and vertical movement of up to 6.4 m (21
ft)
As a result of accurately accounting for blast movement,
this mine:
 Reduced dilution—23,000*
tonnes of very low grade
waste were diverted from the mill, avoiding 35%
dilution
 Maximized ore yield—15,400 tonnes of higher grade
ore were recovered, avoiding 25% ore loss
 Increased revenue—by monitoring the movement of the
ore body, this mine generated an additional
US$100,000***
from this blast
*
Numbers are rounded
**
Average grade of ore polygons = 0.22% CuEq
***
Calculated at a copper price of US$5,500/t

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Disseminated porphyry copper mine generated US$100,000 additional value

  • 1. Blast Movement Technologies 2 / 67 Bluestone Circuit Seventeen Mile Rocks Queensland, 4073 office@bmt.com.au AUSTRALIA www.bmt.com.au 08/2017 Commodity Ore Grade Geology Powder Factor Location Copper Low Grade** Disseminated porphyry 1.2 kg/m3 North America This North American open-pit mine produces copper and molybdenum.  Drills and blasts 15 m benches, mined in a single pass  Porphyry copper-molybdenum deposits  Grade control method consists of blast hole assays that inform an ore control model Unaccounted blast movement resulted in dilution and ore loss The BMM System accurately translated post-blast dig lines  Poor reconciliation indicated ore loss and dilution were a problem at the mine  Blast movement was not considered to be a contributing factor to dilution or ore loss given the gradational nature of the ore body  Blast movement monitors (BMMs) were installed in monitoring holes throughout the shot  Installation and detection as per site standard operating procedures  Blast was fired and movement monitored  BMM Explorer software calculated new dig lines, and areas of ore loss and dilution that would have occurred without monitoring Accounting for blast movement diverted 23,000 t of waste and recovered 15,400 t of ore—adding US$100,000 revenue in one blast The mine generated an additional US$100,000 in this blast by diverting waste from the mill and minimising ore loss Significant movement occurs within all blasts. Variation of ±50% from the mean horizontal movement is common, and occurred in this blast.  Measured horizontal movement ranged from 1 to 11 m (3 to 36 ft) and vertical movement of up to 6.4 m (21 ft) As a result of accurately accounting for blast movement, this mine:  Reduced dilution—23,000* tonnes of very low grade waste were diverted from the mill, avoiding 35% dilution  Maximized ore yield—15,400 tonnes of higher grade ore were recovered, avoiding 25% ore loss  Increased revenue—by monitoring the movement of the ore body, this mine generated an additional US$100,000*** from this blast * Numbers are rounded ** Average grade of ore polygons = 0.22% CuEq *** Calculated at a copper price of US$5,500/t