"It's basically a series of little tunnels," Matt Hernan, a geologist who worked at the mine for a decade, told ABC Radio Melbourne. "The portal or entry to the mine is at [the Ballarat suburb ...

The pair were hit by falling rocks 500m (1,640ft) underground at the site in Ballarat, near Melbourne ... mine's previous operator on notice, after a tunnel collapse involving 600 tonnes of ...

He said air legging had not been performed at the Ballarat mine for years and said most mines had stopped doing it because it was unsafe. "They were actually using it to create a tunnel to work in ...