Malik Hooker Womens Jersey  Hard Rock Mining Equipment | Komatsu

Hard Rock Mining Equipment | Komatsu

View: 2322
Average user rating 16
Length seconds: 2m 15s


Did you know?

Coal is the official state mineral of Kentucky.


About: Hard Rock Mining Equipment | Komatsu

Coal stock

Coal is extracted from the ground by coal mining, either underground by shaft mining, or at ground level by open pit mining extraction.


Coal is primarily used as a solid fuel to produce electricity and heat through combustion. World coal consumption was about 7.25 billion tonnes in 2010 The price of coal increased from around $30.00 per short ton in 2000 to around $150.00 per short ton as of September 2008. In early 2015, it was trading near $56/ton.