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Answer :
Final answer:
Mining methods can be categorized into surface and subsurface mining. Techniques like solar evaporation and quarrying are classified as surface mining, while longwall and room-and-pillar mining fall under subsurface mining. Understanding these categories helps in recognizing the different approaches used in resource extraction.
Explanation:
Mining Methods and Their Categories
In mining, methods can be categorized broadly into Surface Mining and Subsurface Mining. Here’s how the mining methods you listed match their respective categories:
- Solar Evaporation: Surface Mining - This method typically involves using solar energy to evaporate water in order to extract minerals, particularly in salt production.
- Longwall Mining: Subsurface Mining - This is a type of underground mining where a long wall of coal is mined in a single slice, with the roof above it allowed to collapse once the coal is extracted.
- Quarrying: Surface Mining - Quarrying involves extracting stone, gravel, or minerals from the earth's surface and is a typical surface mining method.
- Room-and-Pillar Mining: Subsurface Mining - This method is used in underground mining where large pillars of coal are left to support the ceiling while tunnels are excavated.
- Solution Mining: Subsurface Mining - This process involves dissolving a mineral resource and extracting it in solution form, often used for salt and potash.
- Surface Coal Mining: Surface Mining - As the name suggests, this refers directly to mining for coal on the surface of the earth, typically through methods like strip mining or open-pit mining.
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