A deep hole dug straight down is called a borehole. Boreholes are commonly used for mineral exploration, groundwater monitoring, and scientific research.
The older power plants used coal, but it polluted so much we try to use other methods.
A deep hole dug for mining is called a shaft. It provides access to underground mineral deposits for extraction and transportation to the surface. shafts can extend vertically or at an angle depending on the depth and layout of the mine.
deep mining
A coal mine is a place where coal is dug out of the earth. Some mines are completely underground and depend on tunnels to take miners to the coal. Other places, known as strip mines, are open pits in the ground where the coal is dug out.
they dug for coal or gold or dimonds
There are 2 kinds of coal mine shafts-- slope or dug horizontally then down, or a vertical shaft dug nearly straight down. Some coal mines use both--a wide tunnel dug as a slope, then down. However, in the 1800s, they often crawled into a slope mine.Depth of either type, and for either bituminous coal or anthracite coal, can be 1,000 to 2,000 feet underground. Most mines also have labyrinths of tunnels throughout, which can go to different depths.
No one never dug a hole that deep before
In subsurface mining, tunnels or shafts are dug into the ground to access mineral deposits located deep underground. Miners use various methods, such as drilling and blasting, to extract ores and minerals from beneath the surface.
That depends how deep the well was dug or drilled.
The two commonest methods are deep pit mining or open cast mining. With deep=pit mining, shafts are dug vertically downwards, then tunnels excavated horizontally to extract the coal. With open-cast mining, the top-soil is simply scraped away, using large excavators, and the coal is transported away tpo be processed.
It depends were you are harvesting it. Usually, no.