The security aspect of on-going, commercial (i.e. private), major-scale multi-decade mining using many functional nuclear bombs per mine is interesting to contemplate.  Is the scenario that Exxon and Shell etc eventually manufacture the nuclear explosives themselves?  Maybe there is a third party.  China  is good at keeping costs down. Or North Korea?  If the goal is commercial, as for this oil production purpose it must be, one would want the process fully competitive.  I'm sure we'd want to keep the monopolistic government out of bomb manufacture!  I would also hope the security situation wouldn't drive up the labor costs too much - there must be some good way to control access to hundreds of atomic bombs by thousands of coming and going mining employees for decades that is both safe and cheap.