Author： McBride William
Publisher： Taylor & Francis Ltd
ISSN： 0272-6351
Source： Particulate Science and Technology, Vol.25, Iss.5, 2007-09, pp. : 425-434
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Abstract
It has been shown (McBride, 2006) that under a scale model stockpile a central pressure dip, or 'M' pressure, is formed during both the filling and refilling processes of a stockpile containing a central reclaim channel. This article presents the results from further experiments with a noncentral reclaim channel and clearly illustrates that a central pressure dip exists under a conical stockpile with an offset reclaim channel. Additional data were recorded regarding lateral load transfer within the stockpile on initiation of flow, although more experimental work is required to fully understand this aspect. A method for predicting conical stockpile base pressures is presented along with an overpressure theory to account for the vertical load instability induced by the onset of material discharge.
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