The Romans created a hydraulic mining system that literally blew millions of tonnes of mountain away. How was this possible? Ancient sappers dug under the .\r<br>\r<br>\r<br>\r<br>\r<br>\r<br>\r<br>\r<br>Learn about modern underground mining techniques used currently used at Oceana Golds Frasers Mine in Otago. For more information please contact us.
