When I got back from my break, I saw that a lot of people submitted these photos. Some thought that they were from the Lake Vermont mine in the Bowen Basin, some from the Mt Arthur North mine in the Hunter Valley. The story, from one of the emails:
The contractor in the LV was following the dozer which was cutting an access track for the LV. The LV was following too close behind the dozer, the dozer stopped and reversed slightly to realign his cut and didn’t realise the LV was so close behind. Luckily the ripper tore the driver’s side door open which allowed the driver to escape uninjured.