what is open cast mining
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Explanation:
Open-pit mining, also known as open-cast or open cut mining, is a surface mining technique of extracting rock or minerals from the earth by their removal from an open-air pit, sometimes known as a borrow
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Answer:
it is a type of surface mining way of extracting minerals/ rocks from inside the earth.
some major disadvantages are :
Very large amounts of waste rock are mined.
Major disruption of surface: pit footprint, waste dumps. ...
Very large volumes of overburden may need to be moved before reaching the orebody.
it may cause pollution too.
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