Storage of water in the voids of abandoned mines and in fractured rocks

International journal of mine water - Tập 14 - Trang 57-70 - 1995
O. Sammarco1
1Ministry of Industry, Italian Bureau of Mines, Italian

Tóm tắt

This paper describes the characteristics that abandoned mines and fractured igneous and metamorphic rocks must have before they can be utilized as water reservoirs. The geometries of the networks produced by the interconnections of the fractures in rock are frequently irregular and unknown and the experimental results reported indicate that the flow of ground water through these fractures is equally unpredictable. The behaviour of water in a hypothetical reservoir cannot be predicted solely by modelling or tests limited to small areas of the reservoir. An analogy is shown to exist between networks of fractures in hard rocks and mining networks and the possibility of solving problems of water storage in fractured rock by the use of results obtained from mining experience is discussed. Two reservoirs are described, one located in rock fractured by the action of an extinct volcano and the other in an abandoned mine in the same rock. The examples show how knowledge of existing reservoirs can be used to aid correct choice of method. Finally, evaluation criteria based on specified factors are presented, allowing informed selection of methods to be made. These water storage systems have potential application in many Third World countries where long dry spells are encountered.

Tài liệu tham khảo

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