Reducing ground subsidence involving geologica

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• journal_title：Quarterly Journal of Engineering Geology and Hydrogeology
• Contributor：T. Kempka ; M. Waschbüsch ; R. Azzam ; T.M. Fernández-Steeger
• Publisher：Geological Society of London
• Date：2008-
• Format：text/html
• Language：en
• Identifier：10.1144/1470-9236/07-222
• journal_abbrev：Quarterly Journal of Engineering Geology and Hydrogeology
• issn：1470-9236
• volume：41
• issue：3
• firstpage：439
• section：Original Article

摘要

<p id="p-1">Underground mining causes costly subsidence damage world-wide. In the 1980s German mining research developed stowage techniques using mining wastes during longwall mining operations. These were applied successfully, but not continuously because of economic considerations at that time. A combined technique for subsidence reduction, mining waste disposal and CO₂ storage is being developed within the study presented. Oedometer tests conducted on pumpable mining waste suspensions with various moisture contents reveal useful compression characteristics making them suitable for stowing materials in excavated areas. Laboratory CO₂ adsorption experiments on these wastes show remarkable CO₂ sorption capacities in comparison with residual coal seams. The combination of CO₂ storage and subsequent stowage can lead to a cost-effective way of subsidence reduction determined by the growing prices of CO₂ emission certificates and restricting regulations with regard to CO₂ emissions. p>