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base- and precious-metal mining districts are classified by the dollar value of metals produced. only those metallic mining districts with total reported values greater than $500,000 in the production of copper, lead, zinc, gold, or silver are shown. manganese, uranium, and tungsten districts have had significant there are many types of bioleaching processes, and copper is the most common. few of the most popular types of bioleaching extract metals from ore by retrieving sulfide minerals using bacteria that receive energy from non-carbon compounds.jan 14, 2019 the yearly average in coal mining decreased to fatalities from 005, though to miners still die each year in the u.s. coal and non-coal mining industry. the most common accidents occurring in the mining industry are the result of poisonous or explosive gases or mishaps relating to the use of explosives for blasting operations.