The permeability of hydraulic fills under surcharge

Singh, Shailesh, Sivakugan, Nagaratnam, and Chandra, Sarvesh (2008) The permeability of hydraulic fills under surcharge. International Journal of Geotechnical Engineering, 2 (2). pp. 77-87.

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Hydraulic fill is the most common type of backfill used in the underground mines in Australia and world-wide. These fills are granular in nature and are expected to have adequate drainage characteristics when placed underground in the form of slurry, enabling quick discharge of all excess water through the horizontal drives placed at various levels. Problem with drainage is often attributed as the main cause of failures of several barricades that are used to cover the drives and retain the hydraulic fill while the stope is being filled. Barricade failures can be catastrophic, claiming lives and causing significant economic losses. Permeability of the hydraulic fill plays a key role in the selection of the hydraulic fill for the underground mines. Most permeability measurements reported in the literature are from undisturbed or reconstituted samples in the laboratory under no surcharge. However, in the mine stopes the hydraulic fill is subjected to significant surcharge due to the overburden. The objective of this paper is to report some laboratory measurements of permeability of hydraulic fill samples subjected to surcharge pressures, and attempt to relate the permeability to effective vertical stress, void ratio and relative density.

Item ID: 6448
Item Type: Article (Research - C1)
ISSN: 1939-7879
Keywords: hydraulic fill; permeability; minefill; consolidation; seepage through minefills; compressibility; drainage; mine stopes
Date Deposited: 31 Mar 2010 23:48
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering @ 100%
SEO Codes: 84 MINERAL RESOURCES (excl. Energy Resources) > 8402 Primary Mining and Extraction Processes of Mineral Resources > 840205 Mining and Extraction of Precious (Noble) Metal Ores @ 50%
84 MINERAL RESOURCES (excl. Energy Resources) > 8499 Other Mineral Resources (excl. Energy Resources) > 849999 Mineral Resources (excl. Energy Resources) not elsewhere classified @ 50%
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