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Mar 13, 2009Discussion. For underground copper mining, we found a fatality frequency rate of 111/100 000 employee years, which is higher than estimated from reports for year 2007 in underground metalliferous mining in USA (64/100 000 employee years) and Australia (25/100 000 employee years) and for underground/surface metalliferous mining in South Africa (50/100 000 employee years) and Canada
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Get PriceDisclosure: Mining metrics are calculated based on a network hash rate of 141,149,236,608 GH/s and using a BTC - USD exchange rate of 1 BTC = $ 50,060.80 . These figures vary based on the total network hash rate and on the BTC to USD conversion rate. Block reward is fixed at 6.25 BTC . Future block reward and hash rate changes are not taken
Get PriceSep 26, 2019Copper is the third-most-used metal in the world behind iron ore and aluminum. In 2018, the global economy used 23.6 million tons to build electrical systems, automobiles, machinery, and a
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