Mining can also occur with both surface and underground operations taking place on the same reserve.

He said any comments could hinder the group's "underground operation."

The underground operations of the mine were closed until the 15 September following the accident.

From 1911 to 1922, an underground operation produced 320,000 ounces of gold.

In a second phase, from 1935 to 1947, 40,000 ounces were produced, again from an underground operation.

The mine is made up of multiple open pits and an underground operation called Akwaaba.

In mid-2007, the company begun to develop an underground operation.

After a period of open pit mining, lasting for three to five years, the second stage will also include an underground operation.

The company plans to also mine the Transvaal deposit nearby, as an underground operation.

A muscular woman who runs the underground operations of the Academy.