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Answer :
Final answer:
Subsurface mining, also known as underground mining, involves extracting deep mineral deposits using methods like shaft and slope mines. This type of mining minimizes surface disturbance but is generally more expensive and dangerous than surface mining. Its methods are adapted to reach deeper deposits efficiently.
Explanation:
Understanding Subsurface Mining
When resources are extracted from deep underground deposits using shafts or slope mines, this method is known as Subsurface Mining. This technique, also referred to as underground mining, is necessary for accessing mineral deposits that are too deep for surface mining. Subsurface mining employs deep vertical shafts and horizontal tunnels to extract resources efficiently while minimizing surface disturbance.
In traditional subsurface mining, a vertical shaft is dug down to reach the ore body, and miners transport the extracted materials to the surface using elevators. There are various types of underground mining:
- Shaft Mining: This involves vertical tunnels for resource extraction.
- Slope Mining: This method employs diagonal tunnels.
- Drift Mining: A horizontal tunnel is created to access resources.
The economic factors play a significant role in using this method; although subsurface mining is generally more expensive and carries more risks than surface mining due to the hazards associated with working underground, it allows for more precise extraction of valuable ore deposits.
Examples of subsurface mining can be observed globally, particularly in regions known for deep mineral deposits, such as the Witwatersrand Basin in South Africa, which is famous for its gold mines.
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