Drilling operations have resumed at the Lily Gold Mine near Barberton in Mpumalanga.
The operations were suspended at the weekend after new drilling equipment broke down.
The mine is drilling a second escape route that will ultimately help them to get to the three trapped staff members.
Pretty Nkambule, Yvonne Mnisi and Solomon Nyerende are still trapped underground after the container they were working in fell into a sinkhole earlier this month.
They drilling during the day and at night they do maintenance of the machines
The mine's spokesperson Coetzee Zietsman is optimistic they will not experience any more mechanical faults.
“All the parts arrived this morning (Tuesday) and they assembled the drill again and just before ten o’clock today they started drilling and so far everything is going very well, so the process is on track again.”
“ They are drilling during the day, the first light to the last light because it is fairly complex drilling process and also dangerous and because they working with big machinery and things. They don’t like to drill at night, they drilling during the day and at night they do maintenance of the machines to make sure that when the first light comes in they are fully operational.”