Underground Radio Propagation

[pwdrive]

Thanks for the replies guys, both the link and the explanation, not looking to good then, out with the loud halers! Generally no explosive gas in granite mine workings unless some one has dumped tons of rubbish into them, we were allowed to smoke underground in the hardrock mines in Cornwall and Canada no problem (apart from smoking in itself!) apart from when charging or handling explosives, I am wondering if a pair of those cheap walkie talkies you can get without a license would amount to anything, I could do with the them down the woods anyway so my missus can let me know when the kettle has boiled.

Lawrence.