The 24-tear-old Kazakh fell into a ravine after losing control on a high speed descent during the 134km stage held in and around Nice.
He was winched to safety and evacuated to a hospital but was conscious throughout.
Fominykh has never lost consciousness. He will have to wear the bust and needs a period of rest. #forzaDaniil pic.twitter.com/nGvr05SZsL — Astana Pro Team (@AstanaTeam) March 13, 2016
According to his Astana team Fominykh suffered two fractured lumbar vertebrae: the L1 and L3 and will need at least one month of recovery while wearing a neck brace.