Social Sciences, asked by ishan5968, 1 year ago

what is the difference between surface mining and underground mining

Answers

Answered by Sukanyayayayayayayay
8
The Difference Between Underground Mining And Surface Mining. 1. TheDifference Between Underground Mining And Surface Mining The process of removal of essentialmineral ores or geological substances from soil or sand is called mining. ...Minerals can be metallic or non metallic and can be used for a several of purposes.
Answered by swagg0
31
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DIFFERENCE BETWEEN UNDERGROUND AND SURFACE MINING:-

*Main Difference:
In surface mining, the ore is accessed directly from the Earth's surface, and contact is maintained with the surface throughout the operation.
Underground or subsurface mining is accomplished with the help of tunnels going into the Earth, and does not occur on the surface.
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*Working Principle:
In surface mining, the topsoil and bedrock is removed to access the ore; all done from the surface.
In underground mining, the bedrock is kept intact, and tunnels are used to access the ore from below.
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*Type of Ore:
Surface mining is suitable for large, low-grade ore deposits which occur below a thin layer of rock, or alluvial deposits found in sand and riverbeds.
Underground mining is used for small, high-grade deposits covered with a thick overburden (soil and rock above the ore), or for deep and sloping deposits.
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*Types of Methods:

Surface mining can be accomplished by the following main methods:
Open-pit Mining: Removing ore to leave a crater.
Quarrying: An open-pit mine for construction materials.
Strip Mining: Ore is removed in parallel strips.
Mountaintop Removal: Top of a mountain is blasted to remove deep ore.
Dredging: Ore is removed from a river bottom.

The main methods of underground mining are:
Room and Pillar Mining: Removing ore, while leaving behind some for roof support.
Longwall Mining: An edge of the ore is sliced off in a to-and-fro pattern.
Cut and Fill Mining: Ore removed from the tunnel, which is then filled with waste.
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