No audio signals have been received in the past 20 hours from mine workers still trapped at the Lily Mine in Barberton, Mpumalanga on Wednesday morning.
Day six of rescue operations to retrieve three remaining mine workers stuck underground are underway with hopes slowly fading of finding them alive as they haven't had any food or water in the past five days.
According to Amcu Mpumalanga regional secretary, John Sibiya, the situation has been the same since Tuesday with no communication between the trapped miners and rescue workers.
Hopes rose on Monday when it was revealed that tapping had been heard from where the missing miners are believed to be trapped.
Two women, Yvonne Mnisi and Pretty Mabuza as well as one man, Solomon Nyarenda, remain trapped in a metal container underground. The three were in the lamp room, which was housed in the container, when a central pillar of ore, called a crown pillar, collapsed on Friday. The container was swallowed up in a sink hole as big as a rugby field.
Seventy-six miners were rescued.
Dynamite will be used to remove heavy rocks blocking the path of rescue workers.