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Mining Methods. What determines the type of mining?. Depth of overburden Size of the ore body Shape of the ore body Grade. What are the types of mining?. Open Pit Underground Solution. Open Pit Mining. Another type of open pit mining. Strip Mining E.g. coal, placer.

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What determines the type of mining l.jpg
What determines the type of mining?

  • Depth of overburden

  • Size of the ore body

  • Shape of the ore body

  • Grade


What are the types of mining l.jpg
What are the types of mining?

  • Open Pit

  • Underground

  • Solution



Another type of open pit mining l.jpg
Another type of open pit mining

  • Strip Mining

  • E.g. coal, placer







Some types of underground mining l.jpg
Some types of underground mining

  • Room and Pillar

  • Cut and Fill

  • Long wall (coal)






Beneficiation l.jpg
Beneficiation

1.Concentration of ore minerals

removes the ore mineral from the waste

2. Smelting

removes the metal from the ore mineral by a variety of ways

3. Heap Leaching

removes metal from the ore by solution


Methods of concentrating l.jpg
Methods of concentrating

  • Grinding of ore to allow separation of the ore minerals by:

    • Floatation

    • Magnets


Types of smelting l.jpg
Types of smelting

  • Roasting

  • Hydrometallurgy

  • Electrotwinning




Heap leaching l.jpg
Heap Leaching

  • In this process, typically done for Au, the ore is not ground, but rather, crushed and piled on the surface.

  • Weak solutions percolate through the material leaching out the desired metals.

  • The solutions are collected and the metals are precipitated


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