ABSTRACT
Different types of process effluents and waste waters are produced as a result of mining. These may arise due to the extraction process, by the subsequent preparation of the mineral that is mined, from the disposal of spoil or from stockpiles. The rock mass from which the groundwater involved is derived, the mineralogical character of the material mined and the spoil, and the preparation processes employed all affect the type of effluent produced. Drainage problems also result from past mining operations.
