China National Coal Group will supply in 2019 more than 97 million tonnes of coal to six utilities, with volumes rising in each subsequent year of the deals.
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.