Glencore said it expected to make up production shortfalls at the Hail Creek open cut mine later in the year.
Overall coal production for Glencore of 31.9Mt was 1.3Mt, or 4% lower, than Q1 2019, mainly reflecting operating challenges in South Africa and mining sequencing in the Australian coking portfolio, partly offset by higher Australian thermal coal production.
Glencore's Australian thermal and semi-soft production of 18.1Mt was 400,00t or 2% higher than Q1 2019.
Glencore CEO Ivan Glasenberg said the global impact of the COVID-19 pandemic disruptions to its business had, to date, been manageable.
"The majority of our assets are operating relatively normally, a credit to our people that have stepped up to the challenge of a changed working environment, especially those who continue to carry out their work on site at our industrial assets - Glencore's frontline," he said.
"Given our strong liquidity position and resilient business model, we are well positioned to navigate the current challenges.
"We recognise the uncertainty caused by the current environment and endeavour to support our stakeholders, as appropriate."