Question

What is open cast mining?

• A. Making of a large pit
• B. Blast and surface mining
• C. Long wall mining
• D. Tunneling

Answer 1

The correct option is B Blast and surface mining

Open-pit mining, also known as opencast mining, open-cut mining, and strip mining, means a process of digging out rock or minerals from the earth by their elimination from an open pit or borrow.

Open cast mining results in a large hole, or pit, being formed in the process of extracting a mineral. It can also result in a portion of a hilltop being removed. In strip mining a long, narrow strip of mineral is uncovered by a dragline, large shovel, or similar type of excavator.