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3. Which of the following is associated more with surface mining than subsurface mining?

A. It is more dangerous.
B. It is more expensive.
C. It produces less waste material.
D. It disturbs more land.
E. It causes subsidence.

Answer :

B I think I’m not sure hon

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Rewritten by : Barada

Subsurface mining is done more beneath the ground. Thus it disturbs more land than surface mining. Hence, option D is correct.

What is surface mining?

As the name implies, surface mining involves taking minerals from the earth's surface because this is where the ore reserves exist. Open-pit mining is used when there are significant ore reserves.

Machines remove any earth that is not ore and set it aside, leaving behind a huge, gaping hole. Overburden is the term for this substance, which is scraped off and placed into spoil banks.

Explosives are used to break up the ore material that is being removed from the ground after the overburden has been removed from the ore, which is then taken away to be refined.

As mining continues, the size of the ore bed expands, and eventually the pit grows to a very large size. Sub surface mining is done more deep to earth. Hence, it is more land disturbing.

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