South Africa's Thungela Resources (TGAJ.J), opens new tab on Tuesday said it does not expect a derailment on the country's main coal export line to significantly impact its operations. State-owned freight rail operator Transnet was on Tuesday still working to clear the line to Richards Bay, South Africa's major coal export port, after two trains collided on Sunday, the utility said. It did not say what caused the accident or when services would be restored. Transnet said no serious injuries were reported after the incident, but that the disruption of services to Richards Bay would throttle mineral shipments already constrained...