In mining terminology, what is the term for removing ore from a surface excavation?

In mining terminology, what is the term for removing ore from a surface excavation?

• A. Underground mining
• B. Dredging
• C. Open-pit mining
• D. In-situ leaching

Answer: (C)

Removing ore from a surface excavation is called open-pit mining. This method involves creating a large, visible pit near the surface and removing ore along with surrounding rock using surface equipment. It’s well suited to ore bodies that are shallow and spread out, making it economical to mine from the surface. In contrast, underground mining digs tunnels and shafts to reach ore deeper underground. Dredging is about scooping material from water bodies, not extracting ore from a surface pit. In-situ leaching dissolves the ore in place and then pumps the solution to the surface, so no large open pit is formed.

Removing ore from a surface excavation is called open-pit mining. This method involves creating a large, visible pit near the surface and removing ore along with surrounding rock using surface equipment. It’s well suited to ore bodies that are shallow and spread out, making it economical to mine from the surface.

In contrast, underground mining digs tunnels and shafts to reach ore deeper underground. Dredging is about scooping material from water bodies, not extracting ore from a surface pit. In-situ leaching dissolves the ore in place and then pumps the solution to the surface, so no large open pit is formed.