You can check the following thread on the QPR board for some information about pubs and such near Loftus Road. I can't say which of these might be good on Fulham match days or whether you'd be better off elsewhere and then coming over for the match.
Hope you enjoy your trip, loads of pubs near Sheperds Bush Green all good. Leave the pub near the ground alone (The Springbok) as it normally fills up with away supporters who can`t hold thier drink.