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geologists use many methods to find mineral deposits that will be profitable to mine. ore deposits can be mined by surface or underground mining methods. mining provides important resources but has environmental costs. By u.s. law, currently mined land must undergo reclamation. this is not true for old mines. metal ores must be melted to make the iron ore, coke and limestone are crushed into small round pieces and mixed and put on a hopper which controls the input. the most common ores of iron are hematite Fe and magnetite, Fe these ores can extract iron by heating them with the carbon present in the coke. heating coal in the absence of air produces coke.open-pit mining, also known as opencast mining, is a surface mining technique that extracts minerals from an open pit in the ground. open-pit mining is the most common method used throughout the world for mineral mining and does not require extractive methods or tunnels. this surface mining technique is used when mineral or ore deposits are open-pit mining, or open-cast mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow.. this form of mining differs from extractive methods that require tunneling into the earth, such as long wall mining. open-pit mines are used when deposits of commercially useful minerals or rocks are found near the surface; that is copper can be extracted from its ore by: underground: sinking a vertical shaft into the earth to an appropriate depth and driving horizontal tunnels into the ore. open pit: 90% of ore is mined by this method. ores near the surface can be quarried after removal of the surface layers.
feb 28, 2013 quarry of limestone cgm mining solution. quarry is any large pit dug into the ground from which rocks are mined to be used in any number of ways, until the when main limestone quarries mining more detailedIt is used to make glass, as a source of silicon, and is used in oil drilling to improve the flow of oil to oil wells. granite and limestone are used in the construction of homes, buildings, roads and tombstones. these rocks are often mined in large blocks from a quarry. when granite or limestone is mined this way, it is called dimension stone.In surface mining or open pit mining, the top soil and the overburden covering the mineral is removed. then by the process of drilling the rocks or broken. overburden or large rocks that are difficult to break through drilling are removed by the explosives to extract the limestone. then the ore is In addition to being used as an industrial material, limestone is used to produce lime. lime is an important manufactured product with many industrial, chemical, and environmental applications. lime production involves three main processes: stone preparation, calcinations, and hydration. stone preparation includes crushing screening,