Back

MINING
Lesson 3 - Page 7

Next 

How do you mine aggregates? Once you find suitable rocks that can be used as aggregate you then have to remove and crush the material. Usually a mining operation is an open pit, so you would remove the top soil and then blast the rock face. Dynamite is cheap and does the job very efficiently.

After the rocks are crushed by the blast then they are screened into different sizes, depending on the needs of the nearby industry. Gravel and pebble size is used in the construction industry; fine grained is used in concrete industry; and larger pieces are used in the landscaping business.


Silos for aggregate storage

   Back

[Back to Mining]  [Back to Earth Science Grid]

Next