At least 36 artisanal miners were killed on Thursday when part of a copper and cobalt mine owned by Glencore collapsed in southeast Congo, the provincial governor said.
The process to retrieve seven bodies at Gloria Coal mine in Middelburg, Mpumalanga is expected get under way on Monday.
A fan has been placed inside the shaft to extract the toxic gas.
Artisanal miners in Kimberley have made a grim discovery of skeletal remains in shallow graves just outside the city.
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