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Heap leach draindown

PROBLEM

There are a myriad of flow issues related to the successful design of a heap leach pad. Some of these issues are: * Is the design of the drainage system adequate for optimal recovery? * What is the time for the heap leach pad to drain-down once the operation is finished? * What application of liquor will result in an optimal saturation level in the heap? * What cover design will best allow ultimate closure of a heap leach facility?

SOLUTION

The SVFLUX software package will allow successful modeling of a variety of operations and closure scenarios associated with heap leach pads. Various drainage scenarios may be modeled. The long-term performance of a proposed cover design may be modeled in order to minimize the amount of solution released from the closed heap pad. Preferential flow can be modeled using the spatial variability features in SVFLUX. It is also possible to perform rudimentary modeling of the movement of the liquor solution in the pad when SVFLUX is coupled with the CHEMFLUX software.

Additional Articles


HeapLeachAPEM_Block

This model studies the effect of a block failure on a generic heap design with APEM probability method, and a horizontal seismic load coefficient of 0.09.

A probability analysis is used using APEM method and a floating critical slip surface location.

The analysis methods used for this study are:
M-P (Interslice Force Function - Half-sine), and
GLE (Interslice Force Function - Half-sine).

he search method for the critical slip surface is "Block". The block search method allows specification of a slip involving a "block" of soil with two hinge points. Trial slip surfaces are generated by placing a grid of trial vertices at each hinge point. The critical slip surface is considered to be non-circular.

Model filename: Slopes_Group_3 > HeapLeachAPEM_Block.svm

Tags: Slopes_Group_3,Earth structures,SVSLOPE,2D,Steady-State,Probability,Block,Slopes_Group_3,Slope Group 3,Heap leach draindown,Mining,Heap Leach,Infrastructure,Slopes_1/2/3/SAFE

Attachments:

HeapLeachAPEM_Circular

This model is an example of a conceptual heap design evaluating a circular slip surface with APEM probability method, and a horizontal seismic load coefficient of 0.09.

A probability analysis is used using APEM method and a floating critical slip surface location.

The analysis methods used for this study are:
M-P (Interslice Force Function - Half-sine), and
GLE (Interslice Force Function - Half-sine).

The search method for the critical slip surface is "Grid and Tangent". The grid and tangent methodology is one of the most common methods of determining the critical circular slip surface. In this methodology, the trial slip surfaces are specified by a grid of centers and a set of lines to which the circular slip surface must be tangent. The critical slip surface is considered to be circular.

Model filename: Slopes_Group_3 > HeapLeachAPEM_Circular.svm

Tags: Slopes_Group_3,Slopes_Group_3,SVSLOPE,2D,Steady-State,Probability,Grid and Tangent,Slope Group 3,Heap leach draindown,Mining,Heap Leach,Infrastructure,Slopes_1/2/3/SAFE,Earth structures

Attachments:

HeapLeachMonte_Block

This model examines the application of the Monte Carlo analysis to a block failure of a generic heap leach scenario with pseudo-static loading and a horizontal seismic load coefficient of 0.09.

A probability analysis is used using Monte Carlo method and a floating critical slip surface location.

The analysis method used for this study is:
M-P (Interslice Force Function - Half-sine).

The search method for the critical slip surface is "Block". The block search method allows specification of a slip involving a "block" of soil with two hinge points. Trial slip surfaces are generated by placing a grid of trial vertices at each hinge point. The critical slip surface is considered to be non-circular.

Model filename: Slopes_Group_3 > HeapLeachMonte_Block.svm

Tags: Slopes_Group_3,Earth structures,Slopes_Group_3,SVSLOPE,2D,Steady-State,Probability,Block,Slope Group 3,Heap leach draindown,Mining,Heap Leach,Infrastructure,Slopes_1/2/3/SAFE

Attachments:

HeapLeachMonte_Circular

This model is an example of Monte Carlo analysis evaluating a circular slip surface with pseudo-static loading and a horizontal seismic load coefficient of 0.09.

A probability analysis is used using Monte Carlo method and a floating critical slip surface location.

The analysis method used for this study is:
M-P (Interslice Force Function - Half-sine).

The search method for the critical slip surface is "Grid and Tangent". The grid and tangent methodology is one of the most common methods of determining the critical circular slip surface. In this methodology, the trial slip surfaces are specified by a grid of centers and a set of lines to which the circular slip surface must be tangent. The critical slip surface is considered to be circular.

Model filename: Slopes_Group_3 > HeapLeachMonte_Circular.svm

Tags: Slopes_Group_3,SVSLOPE,2D,Steady-State,Probability,Grid and Tangent,Slope Group 3,Heap leach draindown,Mining,Heap Leach,Infrastructure,Slopes_1/2/3/SAFE,Slopes_Group_3,Earth structures

Attachments:

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