BHP said its initial findings of the Nov. 5 incident showed the nearly 3-km (1.9 miles) long train came to a halt after a braking system control cable became disconnected.
Eskom, which supplies more than 90 percent of the nation's power, has warned of potential power outages amid low coal inventories after a major supplier cut supplies and sought insolvency protection.
In the past two years, Cat has been working on growing its offering, particularly in the underground segment, as well as filling up some gaps in terms of trucks sizes.
Queensland state is set to unveil proposed resource regulations that will require miners to pay into an "insurance fund" for the remediation of old mines.
EY’s Canadian Mining Eye index — which tracks the performance of 100 Toronto Stock Exchange and TSX Venture Exchange mid-tier and junior mining companies — dropped 12 percent in the third quarter of the year when compared to the previous three-month period.