91Èȱ¬

It's not an easy time for the mining industry in Africa at the moment. The prices of many metals and minerals have been falling for some time and the profits of many miners are being squeezed.

And, of course, this is having a knock-on effect on government tax receipts, investor returns and workers’ pay levels.

The 91Èȱ¬'s Matthew Davies reports from Johannesburg, South Africa.