Upscaling laboratory results for water quality prediction at underground collieries in South Africa’s Highveld Coalfields / Brent Herbert Usher in Minerals engineering, Vol. 22 N° 1 (Janvier 2009)  

Public ISBD [article]  inMinerals engineering > Vol. 22 N° 1 (Janvier 2009) . - pp. 43–56 Titre : Upscaling laboratory results for water quality prediction at underground collieries in South Africa’s Highveld Coalfields Type de document : texte imprimé Auteurs : Brent Herbert Usher, Auteur Année de publication : 2009 Article en page(s) : pp. 43–56 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Acid rock drainage Coal Environmental Index. décimale : 622 Industrie minière Résumé : The prediction of future acidity and water quality is a key aspect of water management in mining environments. In this paper, different prediction techniques tested in an isolated underground compartment at a colliery in the Highveld Coalfield of South Africa are discussed. Considerations for upscaling these results are explained, and a methodology for upscaling is tested at this facility. Over 30 samples were collected around the compartment and through cored boreholes. These samples were tested using acid–base accounting tests, humidity cells, and mineralogy. From this, an integrated interpretation of potential water quality evolution was made, supported by detailed water quality sampling with the use of surface boreholes, stratified sampling underground, and pumped qualities over a period of two years. The results show that analytical tests play an integral role in water quality predictions at underground collieries. The results also show that, despite the vast differences between laboratory test conditions and the situation in the field, by taking site conditions into account to properly contextualise the results, improved predictions of expected water quality can be obtained. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508000800 [article] Upscaling laboratory results for water quality prediction at underground collieries in South Africa’s Highveld Coalfields [texte imprimé] / Brent Herbert Usher, Auteur . - 2009 . - pp. 43–56. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 1 (Janvier 2009) . - pp. 43–56 Mots-clés : Acid rock drainage Coal Environmental Index. décimale : 622 Industrie minière Résumé : The prediction of future acidity and water quality is a key aspect of water management in mining environments. In this paper, different prediction techniques tested in an isolated underground compartment at a colliery in the Highveld Coalfield of South Africa are discussed. Considerations for upscaling these results are explained, and a methodology for upscaling is tested at this facility. Over 30 samples were collected around the compartment and through cored boreholes. These samples were tested using acid–base accounting tests, humidity cells, and mineralogy. From this, an integrated interpretation of potential water quality evolution was made, supported by detailed water quality sampling with the use of surface boreholes, stratified sampling underground, and pumped qualities over a period of two years. The results show that analytical tests play an integral role in water quality predictions at underground collieries. The results also show that, despite the vast differences between laboratory test conditions and the situation in the field, by taking site conditions into account to properly contextualise the results, improved predictions of expected water quality can be obtained. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508000800

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