Tailings Storage Facility Flashcards
What are the three TSF construction methods?
- upstream method
- downstream method
- centerline method
Mill tailings requirements:
At least 60% sand in whole tailings. Low pulp density for grain-size segregation.
Upstream
Mill tailings requirements:
Suitable for any type of tailings.
Downstream
Mill tailings requirements:
Sands or low-plasticity slimes.
Centerline
Discharge requirements:
Peripheral discharge, well-controlled beach necessary
Upstream
Discharge requirements:
Varies according to design detail
Downstream
Discharge requirements:
Peripheral discharge of at least nominal beach necessary
Centerline
Water- Storage Suitability:
Not suitable for significant water storage
Upstream
Water- Storage Suitability:
Good
Downstream
Water- Storage Suitability:
Not recommended for permanent storage. Temporary flood storage can be designed.
Centerline
Seismic Resistance:
Poor in high seismic areas
Upstream
Seismic Resistance:
Good
Downstream
Seismic Resistance:
Acceptable
Centerline
Raising Rite Restrictions:
Less than 15-30 ft/yr most desirable. Over 50 ft/yr can be hazardous.
Upstream
Raising Rite Restrictions:
None
Downstream
Raising Rite Restrictions:
Height restrictions for individuals raises may apply.
Centerline
Embankment Fill Requirements:
Native soil, sand tailings, waste rock
Upstream
Embankment Fill Requirements:
Sand tailings, waste rock, native soils
Downstream
Embankment Fill Requirements:
Sand tailings, waste rock, native soil
Centerline
Relative Embankment Cost:
Low
Upstream
Relative Embankment Cost:
High
Downstream
Relative Embankment Cost:
Moderate
Centerline
Use of Low Permeability Cores:
Not possible
Upstream
Use of Low Permeability Cores:
Possible (inclined cone)
Downstream
