Phase Adjacencies prevent underground mining and underground dumping. For example, you can mine Cutback1 and Cutback2 simultaneously, but Cutback2 cannot under-cut Cutback1. Similarly you can backfill a pit while it is being mined, but you can't dump underneath an unmined block.

Phase Adacencies only set vertical dependencies between blocks. To finish an entire stage before another, see Custom Dependencies.

Example 1:

Excavate Stage1 and Stage2 simultaneously, without undercutting Stage 2 beneath Stage 1:

Locate Reserves/Mine1/Pit1/Stage2 in the Name column.
Select Reserves/Mine1/Pit1/Stage1 in the Adjacent Stages dropdown list.

Blocks in Stage2 will check for vertical dependencies to Stage1

Example 2

Backfill Stage1 while it is being mined, with an offset of 50 metres between mining and dumping:

Locate Dumps/Backfill1 in the Name column.
Select Reserves/Mine1/Pit1/Stage1 in the Adjacent Stages dropdown list.
Set a standoff distance of 50 metres in the Dump→Pit Standoff column.

Blocks in Backfill1 will check for vertical dependencies to Stage1

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