What’s The Difference Between Underground and Open Pit,
Compared to open pit mining, which often mines soil, gravel, and inexpensive ores, underground mining is targeted at more valuable ore deposits. This mining method does, however, become considerably less profitable the deeper the ore deposits are located.Whats the difference between a pit and a quarry - okdgroup,Whats the difference between a pit and a quarry Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Whats the difference between a pit and a quarry, quarry, aggregate, and different kinds of minerals.What are the negative effects of open-cast mining? - Quora,A city of a quarter million people will probably have 4 or more. What mines? Sand and gravel and building stone. You cannot build buildings, foundations, walls, or roads without sand and gravel. Google Earth your nearest small city and you will see those dreadful open pit mines all over the place.