The Quarry digs a whole area layer by layer down to bedrock – automatically, even while you are away.
You need: a 
Quarry, power (e.g. a 
Quarry Generator right next to it) and a chest touching the quarry.
Crafting Table3 × 3
1 × QuarryHow to:
1. Place the quarry – the area is behind it (red lines show it).
2. Generator + coal next to it, chest next to it.
3. Right-click → mp;2Startmp;0. The frame builds itself, then the drill head starts.
Sneak + right-click (empty hand) starts/stops directly.
Crafting Table3 × 3
1 × Quarry Generator
Crafting Table3 × 3
88 × Frame Part
Crafting Table3 × 3
1 × Control Core
Crafting Table3 × 3
1 × Iron Drill Head