Stockpiles

In the Stockpiles step configure the options for each stockpile. New stockpiles can be added in the Site Lists step.

Assign chunk templates and reclaim types to each stockpile

Stockpiles step items and their usage

Column	Usage	Notes
Type	Stockpiles can be reclaimed: FIFO (First In First Out), LIFO (Last In First Out), or Blended	Reclaim: oldest chunk first, newest chunk first, or all chunks mixed
Chunk Template	Choose how material is bucketed in the stockpile	Grades are homogenous within each chunk, but different chunks may have different grades
Can Reclaim	Allow a stockpile to reclaim	Used to disable reclaim on dead or legacy stockpiles
Can Fill	Allow a stockpile to fill	Used to disable filling on dead or legacy stockpiles
Mutex Group	Assign Mutex groups to LIFO/FIFO stockpiles	Single-Mutex stockpiles cannot build and reclaim at the same time. Set-Mutex groups allow building a set of stockpiles for one-at-a-time reclaim, in any order.
Build Counter	Assign build counters to Mutex stockpiles	Build IDs are unique across multiple stockpiles when they share the same build counter
Target Type	Assign target types to Single-Mutex stockpiles	“Period” targets are specified by period in the Calendar.”Build” targets are specified by build in the Setup.
Total Capacity	Assign stockpile capacity to Auto Chunk stockpiles	Auto Chunk templates create chunks as a function of stockpile size
Blended Parcel	Assign blended parcel names to Blended stockpiles	Blended stockpiles are reclaimed as a single homogenous material type

Restrictions

• Mutex Groups can only be assigned to LIFO/FIFO stockpile types.

• Build Counters can only be assigned to Mutex Group stockpiles.

• Target Types can only be assigned to Single-Mutex Single-Counter stockpiles.

• Blended Parcels can only be assigned to Blended stockpiles.

Stockpile Types

Stockpile reclaim types can be set to FIFO, LIFO, and Blended. Explanation of each type see below:

FIFO

FIFO stockpiles reclaim the oldest chunk first.

• FIFO stockpiles can build and reclaim at the same time.

• Single-Mutex FIFO stockpiles cannot build and reclaim at the same time.

LIFO

LIFO stockpiles reclaim the newest chunk first.

• LIFO stockpiles can build and reclaim at the same time.

• Single-Mutex LIFO stockpiles cannot build and reclaim at the same time.

Blended

Blended stockpiles reclaim a homogeneous blend of all chunks. The stockpile cannot be reclaimed until all chunks are full.

The Blended reclaim type can be used to model large blended stockpiles that are built in campaigns.

Mutex Group

A Mutex Group is about making sure that the next on-blend stockpile is being built while the current on-blend stockpile is being fed.

Single Mutex Group

• In a group with one stockpile, it is either building or reclaiming, but not both.

Double Mutex Group

• In a group with two stockpiles, one is building while the other is reclaiming.

• Once the reclaim stockpile is empty, both stockpiles switch states (even if the building stockpile isn’t finished yet).

Large Mutex Group

• In a group of seven stockpiles, six are building while one is reclaiming.

• The optimiser prefers to finish building stockpiles (to get them ready for reclaim).

• Once the reclaim stockpile is empty, it switches to building, and one of the other six becomes the new reclaiming stockpile.

• The order that they are reclaimed can be set in the Calendar.

Reclaim Before Full

• Minimum Reclaim Threshold can be set for each stockpile in Setup > Stockpile Build Settings.

• If all stockpiles in a group are empty, the first stockpile to fill above the threshold is switched immediately to reclaim.

Build Before Empty

• Minimum Build Threshold can be set for each stockpile in Setup > Stockpile Build Settings.

• If all stockpiles in a group are full, the first stockpile to deplete below the threshold is switched immediately to build.