Radio Oxford often has the editor of Demolition News (or whatever the professional trade journal is called) on to discuss the ongoing recovery.
From what he has been able to find out, he suggests that the support will be in the form of kit such as Wheelbarrow, so as to remotely lay charges to bring down the remaining structure of the collapsed power hall.
From what I can make out from the fairly detailed discussions heard on the Radio (involving other demolitions experts as well as the chap from Demolition News) the problem is that of recovering the remains; if they were not there, then the remnants of the power hall would've be brought down by now, with their fall being directed upon the extant rubble pile. Clearly, to do that would complicate recovery of the bodies.
They thus need to place the explosives very precisely, and the speculation is that the specialist military support may be seeing if the Wheelbarrow (EOD, not garden variety, obviously) can get into a position where it can use its extensible arm to precisely lay the explosives required; from what I recall, the latest version's extensible arm can lift about 150kgs.
Equally, as parabellum has said, it might be heavy recovery, but the demolition contractors who have taken over the task from the original company appear to be well provisioned with that sort of equipment themselves.