Morjik favored of Torag
"Well I am an expert on dwarves and goblins and their tunnels, well fighting in them any way. The dwarves could have sealed off the tunnel. I suspect this is new, and they have been a little busy fighting off the invasion, to be doing construction. I do vote for exploring however, after we have resupplied ourselves.
However your right, we should seal it off in meantime, if feasible."