"This definitely wasn't the return I had hoped for," said Brockhoff who was hoping to compete in her first World Cup at the French event.
"The visibility was horrendous so I couldn't see the take off on a feature. I missed the timing and landed funky."
After a year of injury problems that included surgery in March and only getting back on the snow in August, the Melbourne-native is remaining positive.
"Right now I believe it is bone bruising but I'll get a MRI in Austria this Friday.
"It is what it is really, there was a lot of positives that came from yesterday regardless of the crash."
Brockhoff said she had hit the benchmarks she had set for herself and it was just an unfortunate occurrence.
"Anyone could of made that mistake. There were a bunch of crashes on that course, even Eva Samkova (2014 Olympic Champion) crashed and now needs surgery.
"I don't feel I came back too early or wasn't ready, it was just unlucky. I am flying home to do my rehab and get stronger."
Brockhoff said the thing she was most disappointed in was not being able to defend her title at Montafon this week.
"I'm a little bummed I can't do the next few races but I want to be in the sport for a long time so I'm thinking about the bigger picture."
The 24-year-old was excited for her Australian team-mate Adam Lambert, who took home the silver medal at the World Cup event.
"I'm so stoked for Adam for his first ever World Cup podium, a huge congratulations to him."
Brockhoff said 20-year-old Lambert's silver medal overnight is a step in the right direction for the next generation of Aussie snowboard cross athletes.
"I'm so excited by younger athletes coming up through the ranks, it's great for our sport and the future of Australian snowboarding," she said. "Plus it lights the fire under our bums and gives us a run for our money."