Abstract
During the financial year 1992/93, Zambian Consolidated Copper Mines Ltd (ZCCM) Ltd pumped a total of 263 million tonnes of water from its various mining operations. During the same period the Company produced 23 million tonnes of ore, giving a water to ore ratio of 11.4 tonnes of water per tonne of ore produced. Hydrostatic pressures interesected in underground boreholes ranged upto about 5MPa. Against this background the dewatering techniques that have been practised on the Copperbelt at ZCCM’s mines are reviewed. The methods include the surface exclusion of water, interception of water, simple drainage, breakthrough methods, dewatering drilling, grouting isotope analysis and computer modelling.
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