A mine collapse in western New South Wales has killed at least 17 people, and left another seven people in hospital.
An inquest into the deaths of the victims has been adjourned to next month, with an opening hearing scheduled for September.
More than 40 people were working on the Carmichael coal mine at the time of the disaster, which was caused by an explosion.
The mine has been shut since August, and the Department of Energy and Resources (DoE) said a full investigation would take about a year.
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The mine collapses are among the worst in Australian history, and have led to the closure of a number of mines.
In 2014, a mine in Queensland collapsed, killing at least 12 people and injuring nearly 70 others.
A similar mine in Western Australia, called The Coal Block, collapsed in 2014, killing five people and leaving eight others in hospital, with another five still in hospital today.
Two more coal mines in the Southern Cross Basin, in Western Victoria, collapsed this year.