The general manager of Ballarat Gold Mine has resigned nearly three months after a rockfall at the site claimed the life of a 37-year-old worker.

The collapse occurred at the Mount Clear mine on March 13 , killing Kurt Hourigan and badly injuring his 21-year-old co-worker, Connor Smith.

Late Friday afternoon a spokesperson for the mine's operator, Victory Minerals, confirmed to the ABC that the site's general manager, Peter Crooks, had resigned.

The exact circumstances surrounding Mr Crooks's departure remain unclear, along with who his successor will be.

Following the incident, safety concerns were voiced by the Australian Workers' Union (AWU), which alleged the death of Mr Hourigan was avoidable.

Internal company emails from 2023 seen by by the ABC revealed management was warned about the risk of a rockfall if "minimum" safety standards were not adhered to.

On Satruday, AWU Victorian branch secretary, Ronnie Hayden, issued a scathing assessment of Mr Crooks's tenure.

He said internal emails seen by the union confirmed Mr Crooks had introduced a manual style of mining known as air-legging.

The union previously alleged Mr Hourigan and Mr Smith had been air-legging on unsupported ground in the lead-up to the tragedy.

"The mine still has a long way to go before we would deem it safe, but we know it can get there and we know it can be profitable," Mr Hayden said.

Mr Hayden said union access to the mine had been improved after several incidents when organisers were "blocked" as recently as last month.

The day after Mr Hourigan's body was recovered from the mine the site reopened, but air-legging was suspended until further notice.

The company also gave staff an option to attend work or remain at home to process the tragedy.

Mr Hayden said it was his understanding that all 175 employees at the mine had returned to work.

A WorkSafe Victoria investigation into the collapse continues.