Thanks. If that's the case, an uninformed person such as myself thinks all they need to do is change cutters and resume boring but I know it isn't so simple.
If it is a boulder, I’m not sure how that will work. I’m just thinking of myself trying to drill through a hunk of metal with my drill. I can’t do it with a big drill bit (like this boring machine). Even if I had super-duper titanium diamond bits. BUT - perhaps they can drill it with smaller bits to break up the boulder. Explosives would damage the machine (it can’t back up more than a few feet I don’t think).
I was at one place where to break up a huge boulder they drilled a bunch of holes in it, then put clay in the holes, and then they watered it. The clay expanded and broke the boulder! Of course that boulder was on the ground, and had somewhere to expand too.
Whatever it is, they’ll get it figured out. Lots of time and money though. Oh well. The taxpayers have it covered!
“...change cutters and resume boring but I know it isn’t so simple.”
Not so simple or cheap, especially if there’s Union labor involved.