Question

What is the open cast mining and under ground mining

Answer 1

Answer:

here is your answer

Explanation:

Stope mining is used for most hard rock mining of minerals such as copper, silver, lead and zinc. Stopes are large openings or rooms connected by tunnels in which miners drill and blast the ore. A pillar or wall is left between each room (stope) to prevent the mine from collapsing.

Answer 2

Answer:

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. ... Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface.

Underground mining is used to extract ore from below the surface of the earth safely, economically and with as little waste as possible. The entry from the surface to an underground mine may be through a horizontal or vertical tunnel, known as an adit, shaft or decline.