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Blast holes with W80 at Wolfram Mine, Mittersill, Austria


Project Description:

Drilling of 30 meter long blast holes in Wolfram Mine, Mittersill, Austria. The drilling direction is down and upwards. As in the case of the LKAB mines in northern Sweden, the great benefit for the mine in using Wassara is the ability of the system to drill long and very straight holes which results in better ore return per drilled blast hole meter. Furthermore the necessary development per ton produced can be reduced, while the working conditions in the mine are much improved due to less dust in the air and no oil mist.


Result:

After test drilling with Wassara with good results it was decided to introduce the Wassara technology.
 

Equipment:

Hammer

Wassara W80

 

Bit

Wassara 90mm

 

Pump

Hammelmann, 200 liter/min at 200 bar

 

Drilling fluid

Clean water, filtered to 100 micron

 

Drill pipe

3 meter

 

Rig

Demac CR50 HD

 

Formation

Medium hard and abrasive