Underground mine workers were evacuated from Glencore’s Newlands coal mine last week due to elevated levels of gas.
All underground workers were evacuated from the mine at around 6am on Friday after an atmosphere monitor in a sealed longwall section recorded potentially-high gas concentrations and triggered an alert.
A Department of Natural Resources and Mines spokesman said the affected area is an old underground longwall panel which was recently sealed after it had come to the end of its production cycle.
Mining operations in an adjacent underground longwall were halted as a result of the gas alert, however surface operations elsewhere at the site were not affected.
Newlands was given permission to recommence operations at 9am Saturday, with production resuming at the mine later in the day.