Borehole mining is used for
underground mining. It can be used in
open pit mining which is
a kind of surface mining. With borehole mining, a hole is
drilled deep enough into the ground to reach whatever is going
to be mined. Then a long, tube-like tool is dropped into the
hole. This tube has places for water to be forced down the tube
and places where the water can be pushed back up the tube. The
water is forced down this tube. The stream of water breaks up
the dirt and rock when it hits it. The water combines with
the dirt, rock, and minerals to make a combination called a slurry. The slurry
is pumped back up to the surface where it is put into a storage
tank. The water is drained and the ore is taken out of it.
From that time on, the ore is treated depending on what it will
be used for.
Mined with Borehole mining: