Sandvik Tamrock's Toro engineers consider that mines up to 2 Mt/y operating at depths of at least 500 m, sometimes more, should consider truck haulage as an economic alternative.
The other variant of the Supra is the 0012R, the 'R' standing for ramp as it is a truck designed for ramp haulage.
Articulated underground haulage trucks traditionally offer the flexibility of smaller drive sizes as well as steeper gradients.
One factor which often clouds the general perception of underground haulage trucks is the nominated capacity.
It is also Caterpillar Elphinstone's belief that the industry is yet to receive the ultimate in underground haulage technology as newer mining methodologies create opportunities for enhanced haulage horizons.
GIA Industri in Sweden is today the owner of the Kiruna Electric truck technology for underground and has recently supplied a complete Electric haulage system, including two model K635E trucks and a 2,100 m trolley line system, to Navan Resources' new Aguas Tenidas mine in Spain.