| Deposit Conditions
Engineering Considerations
Geological Considerations
U/G Mining Costs
Comparison Chart
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Deposit Shape |
Deposit Geometry |
Deposit Thickness |
Ore Strength |
Rock Strength |
Method |
| Tabular |
Flat |
Thin |
Strong |
Strong |
Room & Pillar |
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Weak |
Weak |
Longwall |
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Thick |
Strong |
Strong |
Pillar |
| |
Steep |
Thin |
Strong |
Strong |
Shrinkage, Sublevel |
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Strong |
Weak |
Cut & fill, Square-set, Stull |
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Thick |
Weak |
Strong |
Square-set |
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Weak |
Weak |
Square-set |
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Strong |
Strong |
Shrinkage, Sublevel |
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Strong |
Weak |
Cut & Fill, Sublevel, Square-set |
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Weak |
Strong |
Sublevel, Block,
Square-set |
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Weak |
Weak |
Sublevel, Block,
Square-set |
| Massive |
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Strong |
Strong |
Shrinkage, Sublevel |
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Weak |
Weak |
Sublevel, Block,
Square-set |
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