The move is part of the government's increasing efforts to clamp down on damage caused by the mining industry in the nation, the world's top nickel ore supplier.
The company produced 49,874 ounces of gold in the nine months to September, or 7.8% less than in the same quarter last year. It also cut its 2016 production target.
The men began their protest when their shift ended on Tuesday morning and refuse to come up even though the mine's owner says it won't shut down the operation as planned.
All involved banks will also have to produce all relevant chat room instant messages and any other written communication they exchanged, whatever the media.
The company remains confident the sale of its Rustenburg mines in South Africa to Sibanye Gold will clear its last regulatory hurdle before the end of the year.