If you've got an eye capable of detecting intense amounts of UV light, then it is possible that whatever radiation manages to go underground, may infact be detected by the eye. There's no inherant quality to UV light that would make it particularly useful, as far as I know.

Infravision however would be significantly more useful given that it's based off radiation most living creatures radiate by the bucketload. It would make it particularly useful for hunting creatures over relatively short distances in total darkness. The question is how you would sort the varying frequences from each other and how the brain would represent relative intensities. The easiest way I could think would for the brain to register a certain intensity of light before it starts processing the infravision fully, otherwise you could confuse the brain with two different sets of signals, both of which may display different images. For instance, a dull but very hot object may appear brighter than a candle.