During Upstream Cyclone Deposition:
•Deposition moves into the tailings facility, in the direction that tailings is being deposited.
•The cyclone beach toe is raised vertically.
To define Upstream Cyclone Deposition:
•Set Upstream Cyclone Deposition Parameters on the Material Data Sheet:
oCheck the Cyclone Deposition Box.
oUncheck the Cyclone Material to Embankment Box.
oSelect the Cyclone Beach Profile.
oEnter the Cyclone Underflow Material Dry Density.
oEnter the Underflow Percentage target value.
•Specify upstream deposition on the Deposition Line Data Sheet: Specify the same Deposition and Vector Directions , either:
oLeft of Line for both the Deposition Direction and Vector Direction; or
oRight of Line for both the Deposition Direction and Vector Direction.
Upstream Cyclone Deposition is iterative:
•A deposition surface is developed.
•The cyclone underflow percentage is calculated and compared to the specified underflow percentage.
oIf within a specified limit the model proceeds
oIf not within a specified limit, the Cyclone Profile toe elevation is adjusted and the sequence rerun until either:
▪Convergence is achieved; or
▪The maximum allowable number of iterations is exceeded.
Note: •The underflow percentage is a target value that is applied at each deposition location (point). •The actual underflow percentage may be less than, or exceed, the target value. •The achieved underflow percentage is provided in the status bar during modelling, and result output, following modelling. •The cyclone profile will transition directly to a sub-aqueous profile if its toe extends below the pond i.e. no sub-aerial profile. |
Hints: •Cyclone beaches typically are short and have a steep beach angle. •Refining elements in the cyclone beach area prior to modelling may produce better results. •The cyclone beach toe point is assumed to rise vertically. •Increase the number of raise intervals to mitigate against deposition points being raised vertically. |