what is open cast mining
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Open-pit mining, also known as opencast mining, is a surface mining technique that extracts minerals from an open pit in the ground. ... Open-pits are sometimes called 'quarries' when they produce building materials and dimension stone.
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Explanation:
Open-pit mining, also known as opencast mining, is a surface mining technique that extracts minerals from an open pit in the ground. ... This surface mining technique is used when mineral or ore deposits are found relatively close to the surface of the earth.
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