The safest and cheapest type of mining is surface mining.
Ruby Mining
Barrick Gold Corporation is the world's leading gold mining company. They operate on four continents. Their vision is to be the best and safest gold mining company in the world.
Strip mining is the most effective way?
A mining industry is a mining business or a type of job out of all the other jobs.
Your answer depends on the type of diamond mining that interests you. The types are Artisanal Mining, Hard Rock Mining, Marine Mining, Open Pit Mining and Placer Mining. You can read about the equipment used in each type of mining below: http://www.allaboutgemstones.com/diamond_mining.html
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surface mining
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Drift mining is the type of mining defined by the horizontal opening, or adit, in a mountain. This is the stereotypical mining found in most media, and is in contrast to quarry mining, mining in open surfaces, or strip mining, where all the materials are taken and then filtered.
deep mining
open pit mining
deep mining