BMA said it was not immune to the difficult market conditions.

The miner referenced its January production report, saying metallurgical production for the current financial year is expected to be 10-15% below current capacity on a full-year basis.

“We have been rebuilding depleted inventories and reducing activities as inventories approach normal levels and will continue to adjust production and work schedule requirements in line with market demand and our customer requirements,” BMA said in a statement.

“On that basis, Norwich Park mine will be undergoing a partial shutdown of production for four weeks from 10 June to 10 July.”

BMA said a quarter of the employees at Norwich Park would drop from a seven-day to a five-day roster after the mine reopened.

The miner has previously cancelled prestripping contract work at the mine, with contractor HMP Constructions going into voluntary administration in early April.