Queensland state is set to unveil proposed resource regulations that will require miners to pay into an "insurance fund" for the remediation of old mines.
BHP suspended all its iron ore rail operations on Monday after a train ran away at high speed for nearly 100 kilometres before being forcibly derailed.
BHP had promised to return all of the net proceeds from the $10.8 billion sale of its U.S. shale business to shareholders when the deal was announced in July.
Glencore expected to achieve annual cash savings of more than $300 million in its coal business by the end of 2018, but now it expects savings of more than $450 million by year-end.