Question

Which one of the following examples of shafts ? a-deep bores
b-surface mining
c-off-shore drilling
d-opencast mining

Answer 1

I think off shore drilling

Answer 2

Answer:

The correct answer to the question -"Which one of the following examples of shafts ? a-deep bores b-surface mining c-off-shore drilling d-opencast mining" is-

(A) Deep bores

Explanation:

Deep bores

Deep bores are called shaft, that have to be made to reach minerals deposits that lies at great depths.

For this we should know ,

Shaft mining

Shaft mining, is also termed shaft sinking, it is particularly ideal  for iron or coal, which is a concentrated mineral deposits,  that are deeply embedded underground.

It is a form of underground mining which is done using shafts driven vertically from the top to down into the earth . This is done to access ore or minerals.

Since, shafts in geography are long vertical passage sunk into the earth, as for a mine or tunnel and ,therefore, deep bores are the example of shafts as  that have to be made to reach minerals deposits that lies at great depths.