NOTE: Mining on a shallow slope is dangerous since you are basically mining straight down and so are probably gonna dig yourself into a pit. A slope of 10+ is probably safe (estimate).
=== Mine doors ===
You can limit access to your mine with the use of a [[mine door]]. Several types of mine doors are available.
=== Tunnel excavation ===
Tunnel excavation produces [[rock shards]] on every action.
==== Dropshaft ====