By March, coal exports from the mine should be running around approximately 35,000 to 40,000 tonnes per
The company immediately launched an investigation.
South Australian regulatory approval is required before the various on-site activities can take place.
It will cover an area of 144 hectares.
No incidents, injuries or equipment damage has been recorded.
ROM coal production guidance for Narrabri in FY2018 is expected to be in the range of 8 million tonnes
The mine, acquired from Vale in 2015, had a history of safety issues.
The project's bankable feasibility study is nearing completion.
The line links with the main Goonyella rail line, which runs to the Dalrymple Bay Coal Terminal in Queensland.
The New Acland operation contributed close to $500 million per annum in economic activity.
Walton is located 200km west of Rockhampton.
That will bring to 132 the number of days the company has locked the miners out of work.
Product coal will be sold to the domestic market.
Some delays occurred due to major component failures.
Exploration planning and access negotiations to complete two drill holes at Cooroorah are under way.
Overburden removal for the September quarter was 4.8% above the previous quarter.