When would miners use an open pit mine?
A) when the ore deposit lies close to the surface
B) whenever the ore deposit is laterally extensive
C) when the ore is high-grade
D) when the ore is low-grade

Question

Quizplus · Accepted Answer

Open pit mines are used when the ore deposit is close to the surface, allowing for more efficient and cost-effective extraction compared to underground mining. This method is ideal for mining large, low-grade ore deposits that are too deep to be extracted through surface mining methods such as strip mining. Therefore, the correct answer is A.

When Would Miners Use an Open Pit Mine