Mark Hughes is looking to bring in as many new faces as possible before the transfer window closes on Tuesday, and has already signed Taye Taiwo and Nedum Onohua for the Loftus Road club.
With Alejandro Faurlin currently injured, the newly promoted side could do with an extra option in the middle of the park, and Diakite looks set to finalise a loan deal on Monday.
The 23-year-old is currently on international duty with Mali at the African Cup of Nations, but Nancy president Jacques Rousselot has confirmed that Diakite will fly to London to undergo a medical.
“Alain Giresse, coach of Mali, agreed that Samba could go to England to complete his loan,” Rousselot told L’Equipe.
“It will be a loan with an option to buy if QPR are still in the Premier League at the end of the season.”
The reported fee if Rangers decide to make the deal permanent is around €4million (£3.4m).
By Gareth McKnight