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Published bySusanna Johnson Modified over 9 years ago
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What is mining? Mining: is extracting ore or minerals from the ground Ore: the natural material large enough and pure enough to be mined for profit.
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Types of Mines There are two main types of mines. 1)Surface Mining 2)Subsurface Mining
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Surface Mining Surface mining is used to remove mineral deposits on or near the Earth’s surface. There are 3 types of surface mines: 1.Open-pit: removes large, near surface deposits of minerals such as gold and copper. Mined downward in layers 2.Quarries: stone, crushed rock, sand, gravel 3.Strip Mining: removing surface coal in strips up to 50 m wide x 1 Km long
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Surface Mining This quarry in northwest Georgia is an open pit used to mine granite.
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Subsurface Mining
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…. A video about mining coal.
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http://www.uky.edu/KGS/coal/images/minmethd.gif
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Mining Demonstration Which type of mining am I demonstrating?
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Effects of Mining on the Environment
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What happens to a mine when it is no longer being used? http://www.abandoned-mines.org/home-e.htm Mine reclamation is the process by which land used for mining is returned to its original state or better. Has been required by law since the mid- 1970’s.
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Mining To reduce the effects of mining, reduce our need for minerals, reuse, and recycle. Reduce: use less Reuse: get as much use out of the materials you have. Recycle: use the material to make something else, rather than throwing it away.
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About Gemstones Gemstones are highly valuable minerals because they are beautiful and rare, not because they are useful. Color is the most important characteristic of a gemstone. The more attractive the color is, the more valuable the gem is.
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