The shovel digs both ways — burying and unearthing with the same blade. Dream-digging asks which: are you interring something to be done with it, or excavating what was hidden? Digging your own hole warns of effort deepening the problem.
Positive Resonance
The buried recovered, foundations dug, honest ground-work
Shadow Aspect
Digging yourself deeper, burying what will not stay down
Nuances
Unearthing something: the hidden brought up
Burying something: consigning to the ground
Digging deeper: effort worsening the hole
Striking something hard: the dig meeting resistance