How do you go about unblocking the tunnel from the lumbradge cellar/dorgesh-kaan entry way to the lumbridge swamp caves? there is an option to "squeeze through hole", but when I click it it says, "The tunnel is blocked with rocks." I have tried to use a pickaxe on it to no avail. Help!

Dont u have to do that lost tribe quest or something?

it should be one of the dorgeshkaan quests... see which ones u have not done.

You have to be on a certain side to clear away the rocks with a pickaxe. I don't remember which side though. So try going to whichever side you weren't on before and then use the pickaxe on it.