Podcast
Questions and Answers
What is the primary reason for storing overburden near an open-pit mine?
What is the primary reason for storing overburden near an open-pit mine?
- To be used later for mine restoration. (correct)
- To prevent dust and erosion in the surrounding area.
- To sell it as a secondary product.
- To provide structural support for the mine walls.
The safe angle of the walls in an open-pit mine is MOST dependent on which factor?
The safe angle of the walls in an open-pit mine is MOST dependent on which factor?
- The type of deposit and overburden. (correct)
- The equipment being used.
- The distance to the nearest town.
- The depth of the pit.
In open-pit mining, benches are created to:
In open-pit mining, benches are created to:
- Increase the speed of mineral extraction.
- Improve the aesthetic appearance of the mine.
- Facilitate drainage of water from the pit.
- Reduce the risk of rock falls. (correct)
Which of the following BEST describes the initial step in open-pit mining?
Which of the following BEST describes the initial step in open-pit mining?
What is the key difference between open-pit mining and quarrying?
What is the key difference between open-pit mining and quarrying?
Flashcards
Open-pit mining
Open-pit mining
Mining technique for shallow, valuable deposits under a layer of valueless material.
Overburden
Overburden
The waste material overlying a valuable mineral deposit that is removed during mining.
Benches (in mining)
Benches (in mining)
Horizontal levels or steps in an open-pit mine, designed for stability and access during excavation.
Safe wall angle
Safe wall angle
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Quarries
Quarries
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Study Notes
- Open-pit mining is also referred to as open-cast or open-cut mining
- Open-pit mining is suitable when a valuable deposit lies near the surface, often under a substantial layer of less valuable material
- The material above the deposit is known as overburden and must be removed to access the desired deposit
- Removed overburden is stored for later use in mine restoration
- Open-pit mines are excavated in sections called benches
- Bench walls are angled to minimize the risk of rock falls
- The safe angle for bench walls is determined by the type of deposit and overburden
- Roads are constructed during the digging process for removing both the mineral deposit and the overburden
- Quarries are open pits from which building materials like sand, gravel, and stone are extracted
- Extraction processes from pits consistently employ similar methods
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Description
Learn about open-pit mining, also known as open-cast or open-cut mining, which is used for valuable deposits near the surface. Overburden, the material above the deposit, is removed and stored. Mines are excavated in benches with angled walls for safety.
