Chapter 2: The Environmental Effects of Strip Mining - . Open Pit Mining. Open pit mining is similar to area mining. The technique is common in the western United States (and other parts of the world) where very thick — 50 to 100 foot — coal seams exist. Open pit mines are usually large operations. Production levels may exceed 10 million tons of coal per year. How can metal mining impact the environment? | . Open pit mining disturbs larger areas than underground mining, and thus has larger visual and physical impacts. As the amount of waste rock in open pit mines is commonly two to three times the amount of ore produced, tremendous volumes of waste rock are removed from the pits and deposited in areas nearby. Open Pit Mining Stock Photos and Images - 123rf Download open pit mining stock photos. Affordable and search from millions of royalty free images, photos and vectors.    Read More

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