The operator of the Hazelwood coal mine in the Latrobe Valley will face a trial over the 2014 fire at the site.

The Victorian workplace safety regulator, WorkSafe, charged the Hazelwood Power Corporation with 10 alleged breaches of occupational health and safety laws last year.

This week, after legal proceedings in the Latrobe Valley, the company was committed to stand trial over the fire, which covered the nearby town of Morwell, home to about 14,000 people, with smoke and ash.

Hazelwood indicated to the court that it would plead not guilty to the charges.