Level 4 Mining Missions are perfect for this. I do this currently when I’m busy with other stuff and it works like a charm. It is reasonably safe since you are mining in deadspace and you fly cheap ships - so players have to combat probe you to kill you.
You are not really mining for materials here, since those are mission-only items but you get some ISK and LP.
Here is the guide that made me try it in the first place: Level 4 Mining Mission Summary