The idea looked workable on parchment fungus. Deep shafts out of which a geothermally-powered laser would fire. True, it could not be aimed, and there would be dead zones around the laser and the feedback energy dispersal shafts, but the Powers that Be insisted on continuing. That is, until it was calculated that the full-size laser would produce heat beyond what any known solid material could take, and so would melt both the laser guide and the feedback dispersal system. The shafts already dug were not fitted, but saw peacetime use, much like the missile silos on the Human homeworld after dangerous glitches came to light.
Just a backstory idea I had, although I might show a monastic order in one of these shafts.
"You don't fix faith. It fixes you." -- Shepherd Book, Jaynestown[br][br]Never meddle in the affairs of Daleks, for you are mortal and look good in photo-negative.