@SilverPete, I couldn't quote you for some reason :/
I think in the main it's because the huge amount of mining equipment required for future expansion has been purchased already.
The comment was specific to new mining investment, not short term exports. New investment is declining, and this is something the RBA takes into account when setting rates.
I think in the main it's because the huge amount of mining equipment required for future expansion has been purchased already.