Russian gold mine realised US$340,000 additional value

Russian gold mine realised US$340,000 additional value


Commodity Ore Grade Geology Powder Factor Flitches Location
Gold High and low Disseminated Sulphide 1.15 kg/m3 1 Russia
This disseminated sulphide mine is one of the top producing open-pit gold operations in Russia.
  • Mineralisation is disseminated in sedimentary schists and shales
  • Blasts are fired in a 10 metre bench
  • The site contains high grade (3.5 g/t) and low grade ores


Substantial movement of ore was not monitored or accounted for
  • Misclassification of ore (i.e. high grade ore is stockpiled as low grade or low grade ore is sent to the mill as high grade)
  • Ore loss, with gold being sent to the waste pile
  • Dilution, with tonnes of waste being treated as ore


The BMM System accurately measured blast movement and translated post-blast dig lines
  • Blast movement monitors (BMMs) were installed in monitoring holes throughout the shot
  • Installation and detection as per site standard operating procedures
  • BMM Explorer software calculated new dig lines, and areas of ore loss and dilution that would have occurred without monitoring


Less dilution and more ore generates additional value of US$340,000
Significant movement occurs within all blasts. Variation of ±50% from the mean horizontal movement is common and occurs at this mine.
  • Measured horizontal movement ranged from 2.5 m to 14 m (8 to 46 ft) and vertical movement of up to 4.5 m (15 ft)
As a result of accurately accounting for blast movement, this mine:
  • Reduced dilution—3,800* tonnes (13%) of waste were diverted from the mill, saving US$75,000**
  • Maximised ore yield by recovering 2,600 tonnes of additional ore, valued at US$265,000***
* Numbers are rounded
** Estimate based on mine milling costs of US$20 per tonne
*** Calculated at a gold price of US$1,250/oz.
Accounting for blast movement generated additional value of $340,000
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