This illustration explains quite well how you start off with the highest APR, and mine the lowest APR last. Note the IPR remains constant.

Nice controlled blast at Newmont quarry, posted by Patrick Fennell.

Creighton, an underground nickel mine located in the City of Greater Sudbury, Ontario, Canada, is the tenth deepest mine in the world. It...

The world's 3rd largest excavator is the Liebherr R9800. It was built by Liebherr at its Colmar factory in France from 2008. The...

Made and designed in the United States, Bucyrus International’s Bucyyrus MT6300AC was re-branded as the Terex MT6300AC in 2010. Weighing...

Ken Kuchling explains the relationship well in the diagram below. When given the IRA from the geotech engineers, you can calculate the...

Britain's Biggest Ever Quarry Blast - 50,000 kgs of explosives were used to blast 200,000 tonnes of granite at the Glensanda super quarry...

Escondida copper mine located in the Atacama Desert, Chile, ranks as the third deepest open-pit operation. Escondida copper mining...

The Bucyrus RH400, owned by Caterpillar, is the world’s biggest hydraulic excavator. It was originally launched by Terex in Germany in...

This ultra-class haul truck has a payload capacity of 400 short tons (363 t). The 20-cylinder, electronic common rail injection, quad...