Module 6 Flashcards
is the process of mineral extraction from a rock seam or ore –a natural
rock or sediment containing one or more valuable mineral.
Mining
Modern mining technology uses
________________________ that involve measuring the magnetic, gravity and sonic
responses of rocks above and around a prospective mineral ore body.
geophysical techniques
There are two methods of mining:
Surface Mining & Underground mining
– is used to extract ore minerals near the surface of the earth. The soil and rocks that covered the ores are removed through blasting. Blasting
is a controlled use of explosives and gas exposure to break rocks.
Surface Mining
This is the most common type of surface mining. ___________ means a big hole (or pit) in the ground. The pit in mine is created by blasting
with explosives and drilling. It is used to mine gravel and sand and even rock.
Open-pit mining
This mining type involves the removal of a thin strip of overburden (earth or soil) above a desired deposit, dumping the removed
overburden behind the deposit, extracting the desired deposit, creating a
second, parallel strip in the same manner and depositing the waste materials
from that second (new) strip onto the first strip. This mining method is used
for coal, phosphates, clays, and tar mining.
Strip mining
This is the process of mining materials from the bottom of a body of water, including rivers, lakes, and oceans.
Dredging
– is used to extract the rocks, minerals and other precious stories that can be found beneath the earth’s surface. In ___________________,
miners need to create a tunnel so they can reach the ore minerals. This kind of
mining is more expensive and dangerous as compared to surface mining because
miners need to use explosive devices to remove the minerals from the rocks that
cover them.
underground mining
is the process of extracting minerals from the ore, refining them, and preparing these minerals for use.
Mineral processing
