Peak Loads on Feeders in Floor Storages of Broken Rocks
A. A. KRAMADZHYAN, E. P. RUSIN, S. B. STAZHEVSKY, G. N. KHAN AND
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: раздробленная руда, дилатансия, дилатансионное упрочнение, “ловушки” дилатансии, пиковая нагрузка, напольный склад, узел разгрузки, пластинчатый питатель, сходящийся канал, broken ore, dilatancy, dilatational strength, dilatancy “traps, ” peak load, floor storage, discharge unit, apron feeder, narrowing channel
Abstract
Actual physical models and discrete element method are used to analyze stress state of broken rocks at the moment when an apron feeder starts discharge from floor storage. It is shown that designs of discharge units of floor storages fail to eliminate broken rock dilatancy which is a determinant of the peak load on the feeder at the moment of its actuation. Based on the investigation results, the authors propose an approach to filling floor storages with broken rock and a structural layout for the storage discharge unit. The offered engineering solutions enable preventing from dilatancy-induced impact on stress state of broken rock flow and, as a result, elimination of peak loads on feeders.
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