4D modeling of concentrating mill tailings dam protecting dike soil consolidation

Abstract

Introduction. The research aims to study concentrating mill tailings dam protecting dike soil consolidation on the example of a mining enterprise of the Kola Peninsula. Research methodology. The research is based on 4D modeling (taking into account a time factor) using PLAXIS software solution. The computer hydro-geomechanical 3D model of the concentrating mill tailings dam fragment has been developed allowing to investigate both geomechanical and fi ltration processes, and their collateral infl uence on protecting dike and alluvial beach soil consolidation. The following options of tailings dam hydro-geomechanical condition development are considered: a reference state at the current parameters of operation, increase in the level of water-saturated tail deposits and the subsequent consolidation of bulk and alluvial soils within 1, 2, 3, 5, 10, 15, 20, 30, 50 and 80 days. Research results and analysis. The received results have been analyzed on the dynamics of the tailings dam hydro-geomechanical condition therefore revealing its behavior in time. It has been established that the nature of bulk and alluvial soils consolidation is identical, however, differs signifi cantly in terms of quantity. Conclusions. Dependences of bulk and alluvial soils consolidation of the tailings dam hydraulic engineering construction on consolidation time are established providing a scientifi c and technical basis for its mechanical state and stability assessment, and for engineering recommendations about the terms of the following stage of dams building.

Development of methodology for economic evaluation of land plots for the extraction and processing of solid minerals

“…The structure of the enterprise for the extraction and processing of solid minerals includes a processing plant, for the effective operation of which about 15 % of fresh water is required, which is necessary to restore the water balance in case of natural losses [41] associated with the production of finished products and the storage of tailings over a large area in a tailing dump. [42]. If the factory is located far from water sources (lakes, rivers), the enterprise has to build massive water intake systems, create main water pipes, which affects the amount of operating and capital costs, and, accordingly, the profit and profitability of the enterprise.…”

Многоуровневые Комплексные Исследования И Мониторинг Хвостохранилищ Горнодобывающих Предприятий Северо-Западной Части Российского Сектора Арктики

“…В результате, эффективное напряжение в грунтах оказывается низким, и для надежной эксплуатации хвостохранилища, и для обеспечения устойчивости дамбы должны быть приняты периоды времени, в течение которых происходит промежуточное уплотнение грунтов за счет их консолидации [19,30,130,152]. Вследствие консолидации, за счет уплотнения грунтов, избыточное поровое давление воды рассеивается и снижается, а грунт может приобрести «скелетную» жесткость, обеспечивающую сдвиговую прочность, необходимую для эксплуатации дамбы [152,153].…”