no it won't work. I'll tell you how I know it won't work, because I have tried it. People are getting desperate now and I keep telling them, not a whole lot can be done until there is a thaw. they haven't listened. I have tried disconnecting pipe, pouring hot water into it, sticking a compressor on it and that failed.
Things that worked.
Dig up pipe where it is swallow, take temp readings off pipe, where ever there is a minus reading, apply gentle heat, warm (not boiling) water or hair dryer. This has been successful if you can track pipe.
Disconnect stop cock at entry point and see if water is there, if so, run temp supply over ground from stop cock and run to outside tap, unscrew outside tap and fit pipe. this will frezze too, but pipe can be disconnected coiled up and dropped into bath of warm water to thaw and reconnected.
I have seen things I have never seen before and desperate times call for desperate measures.
Good luck.