BHP Group (ASX:BHP) shares fell nearly 1% in morning trade Friday after the Australian High Court rejected its bid for special leave to appeal the "same job, same pay" rulings covering mine workers in Queensland.

The decision concludes the mining giant's attempts to overturn the Fair Work Commission and Federal Court rulings confirming labor hire workers performing the same job as permanent employees should receive the same pay, the Mining and Energy Union said in a statement on Thursday.

The rulings have already delivered pay rises of around AU$20,000 to AU$30,000 a year for over 2,000 workers across the company's Goonyella Riverside, Peak Downs and Saraji mines in Queensland, per the statement.

BHP did not immediately respond to a request for comment from MT Newswires.