BHP Billiton has announced it will spend $7.4 billion to expand its Western Australian iron ore operations' capacity to over 220 million tonnes per annum, and has invested another $2.6 billion on its Queensland coal operations.

BHP Billiton has announced it will spend $7.4 billion to expand its Western Australian iron ore operations' capacity to over 220 million tonnes per annum, and has invested another $2.6 billion on its Queensland coal operations.