SUCCESSFUL MONITORING AND TARP* “SSRTM is the preferred method for wall displacement monitoring at EHM, with proven effectiveness in mitigating risk associated with slope scale rock mass failure. ” Peter Saunders, Geotechnical Superintendent, Xstrata’s Ernest Henry Mine (EHM). Owned by Xstrata PLC, Ernest Henry Copper Gold Mine is situated 131 Kilometres north east of Mount Isa. It is 1,500 metres in length by 1,200 metres wide with a final depth in excess of 500 metres. As the name suggests both copper and gold are produced here, with capacity of the mine at 11 mega tonnes per annum. As a result of the aggressiveness of the original design of the mine, there is a high potential for planar, wedge and toppling failures. The mine structural domains, steep walls and two aquifers

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