Justification of an Oblique Font Bank in Dredging of Placers
I. A. Meshkov, B. L. Tal’gamer, N. V. Murzin
Irkutsk National Research Technical University, Irkutsk, Russia
Keywords: Placers, dredge, productivity, inter-pass pillars, oblique front bank, advances axis offset, grapho-analytical method, bucket fill factorm, technical and economic optimization, software
Abstract
The article describes the analysis of the parameters of an oblique front bank cut by dredges with the bucket capacity of 250 and 380 l in different geotechnical conditions. The database formation is described using the grapho-analytical modeling. The introduction of a term advance axis offset relative to the front bank center as a parameter linearly correlated with the dredge swing angle is justified. The calculation procedure of dredge productivity is proposed; it is verified by the field observation data. this procedure takes into account the change in the dredge swing angle and in the bucket fill factor. The economic evaluation of the dredging efficiency in the transition to the oblique front bank is carried out. Using the method of the discrete parametric optimization, the conditions are determined for recommending the use of the oblique front bank. A software is designed for the automated choice of optimal parameters for the oblique front bank in dredging in various geological conditions.
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