Method for capping mine waste and tailing deposits

Details Method for capping mine waste and tailing deposits Method for capping mine waste and tailing deposits

B - Operations, Transporting

09

B

B09B 1/00 (2006.01)

Patent

CA 2273235

A method for providing a composite capping cover for maintaining the surface of a sulphide bearing tailing and mine waste containing deposit moist thereby substantially eliminating oxidation of the sulphidic particulate in the deposit and the formation of heavy metal salts. The moisture is provided by atmospheric precipitation. The composite capping cover comprises a fine particulate layer, a fine-granular particulate layer and a coarse-granular particulate layer, the particle sizes of the particles making up the individual, the layers having been selected such that the hydraulic conductivity of the layers increases with successive layers while the matric suction value within the layers decreases.

Procédé permettant de produire une chape composite destinée à maintenir la surface des boues et des résidus miniers contenant du sulfure et une humidité de dépôt, de façon à empêcher sensiblement l'oxydation de la substance particulaire sulfurée dans le dépôt et la formation de sels de métaux lourds. L'humidité est fournie par les précipitations atmosphériques. La chape composite comprend une couche de particules fines, une couche particulaire à grains fins et une couche particulaire à gros grains, la granulométrie des particules constituant les différentes couches étant choisie de façon que la conductivité hydraulique des couches augmente avec leur succession, tandis que leur valeur d'aspiration matricielle diminue.

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