BHP Billiton Iron Ore and subcontractor HWE Newman Services have been fined more than $230,000 in total over a fatal workplace accident in the Pilbara.
Paul Sparkes, 29, died in August 2008 while working at BHP's Yandi mine near Newman, which was then operated by HWE.
The mobile maintenance supervisor was struck by an arm of a tyre-handling device that had sprung off.
The Perth Magistrates Court yesterday heard that BHP and HWE failed to provide the necessary equipment for safe tyre assembly, and Mr Sparkes did not receive sufficient training.
BHP was fined $102,000 and HWE was fined $136,000.
Both companies were also ordered to pay a total of $125,000 in court costs.
Department of Mines and Petroleum resources safety executive director Simon Ridge said that while the majority of mining companies were operating to high safety standards now, more could still be done.
"While mining activities can pose risk, mining workers should not be placed in harms way. It is completely unacceptable," he said.
"Measures must always be in place to reduce risks to an acceptable level."AAP