Which mining method involves removing mineral-bearing ore from a large surface excavation?

Which mining method involves removing mineral-bearing ore from a large surface excavation?

• A. Near-gem
• B. Normal
• C. Old European cut
• D. Open-pit mining

Answer: (D)

Open-pit mining is a surface mining method that removes mineral-bearing ore from a large, open excavation. It begins with removing the overburden and then digging a big pit that expands as ore is extracted, using benches and ramps so equipment can access deeper sections. This approach is economical when the ore body is near the surface and spread over a wide area, allowing large volumes of rock to be processed from above rather than through underground tunnels. It contrasts with methods that extract ore underground, which require tunneling and more specialized underground workings. The other terms listed aren’t mining methods at all—one is a diamond cut style and the others are unrelated descriptors—so they don’t describe how ore is removed.

Open-pit mining is a surface mining method that removes mineral-bearing ore from a large, open excavation. It begins with removing the overburden and then digging a big pit that expands as ore is extracted, using benches and ramps so equipment can access deeper sections. This approach is economical when the ore body is near the surface and spread over a wide area, allowing large volumes of rock to be processed from above rather than through underground tunnels. It contrasts with methods that extract ore underground, which require tunneling and more specialized underground workings. The other terms listed aren’t mining methods at all—one is a diamond cut style and the others are unrelated descriptors—so they don’t describe how ore is removed.