Describe the solution you'd like
When a Miner enchanted with Unusing (evilcraft:unusing) falls below 6 remaining durability, it just stops working inside a Dimensional Mineshaft.

It allows to repair it in the future using blood from EvilCraft.
But during the repair it can became cursed and break faster (Curse of Breaking), so it's not a cheaty mechanic.

@DmitryScaletta thanks for bringing this up, it slipped under my radar so far!
Am I understanding it right that below 6 durability IF it has that enchantment the miner should just be ignored (not dropped out, not consumed, just pause the mineshaft)?

Am I understanding it right that below 6 durability IF it has that enchantment the miner should just be ignored (not dropped out, not consumed, just pause the mineshaft)?

Yes, that's right.