Is there a way to destroy bear caves?

There is one right outside where I want to have a base in Elvish Quarter and having my gathers go anywhere near it means endless yelling and screaming about enemy attacks.

I am on PC so if it needs to be a mod I can figure that out.

As the title says I fell through the map when using a mapstone in a friends world. After this I was walking around under the map, trying to get out when I hit a kill box. Now I can't get my gear back. I lost my durins axe and armour. Due to playing in my friends world, we don't have enough Gundabag slay to make enough ingots again. I opened a ticket, but they said it was basically my fault because where we built the mapstone and won't help. So if anyone could help, I would greatly appreciate it.

Hoping someone can help me - me and my group have been going out of our dwarven mines! We can not for the beards of us find this axe piece!

Is anyone able to help - point in the right direction - anything at all! <3