If you were going to do that you wouldn’t waste energy breaking the rock to begin with. I highly doubt it’s feasible to time things that accurately and even if you could there is a lot of mountain in the way to soak up the energy.

The depth assumptions for the facility are often with a shallow gradient roads for the entrance and exits, but there is no need for the gradient to be shallow.

And yet the leaked reports don't say that happened, they say it didn't work and that most of the material and equipment was likely already moved.

Is this where we are? Just making up technobabble to glorify the US war machine in a supposedly intellectual forum? All the while the white house says the report is real, but they disagree with the contents of their own intelligence report because "we want big bomb make big boom work good"?

After 25 years it has become abundantly clear that Iraq (the concept) is what the US is, and what it deserves.