The calculation of parameters and modes of hydrotransport in the development of man-made deposits in the storage of waste products

Semenenko, Yevhen; Medvedeva, O.O.; Kyrychko, S.M.; Никифорова, Н. А.

doi:10.15407/geotm2018.142.091

Cited by 2 publications

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“…When constructing a model for the homogeneous fluid flow in a channel, the following assumptions are used [24], [26], [33]- [35] (Figs. 1-3):…”

Section: Methodsmentioning

confidence: 99%

“…The scientific research results, published in peerreviewed publications by domestic and foreign specialists in hydraulics [28]- [32] make it possible, taking into account the above assumptions, to propose a well-known model of pressureless flow with fluid removal through the bottom for the description of the flow through an open channel when an overflow occurs through its wall [24], [33]- [35]:…”

Section: Figure 1 Longitudinal Channel Section With Normal Pressurele...mentioning

confidence: 99%

“…( ) In the studied case, unlike the model ( 1)-( 4), the fluid withdrawal does not lead to a change in the friction conditions and the solid surface, since the overflow occurs through the top, and the flow rate of the fluid leaving the channel is determined according to the well-known formulas of hydraulics, which are used to calculate the overflow layer parameters [28], [35]- [37]. Taking into account this and the assumptions made, the Formulas of the model ( 1)-( 4), after appropriate transformations, take the following form:…”

Section: Figure 1 Longitudinal Channel Section With Normal Pressurele...mentioning

confidence: 99%

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Research into the pressureless flow in hydrotechnical systems at mining enterprises

Semenenko¹,

Medvedieva²,

Medianyk³

et al. 2023

Min. miner. depos.

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Purpose. The research purpose is to develop a mathematical model of a pressureless flow in a channel with the occurrence in some areas of overflow layer through the wall. Using this model, it is possible to calculate the overflow layer height and length, as well as the change in flow rate in the channel due to the withdrawal of part of the fluid as a result of the overflow. Methods. The research uses a comprehensive multi-stage analytical approach. Firstly, in order to develop a mathematical model for a pressureless flow in the channel with the occurrence in some areas of overflow layer through the wall, this research analytically determines the dependence of the flow rate through the channel wall based on formulas for calculating the weir discharge coefficient. At the second stage, a mathematical model of a hydraulic mixture pressureless flow in a rectangular channel with an overflow through the wall is developed to determine the parameters and flow regimes of the stream. Findings. The dependences of the dimensionless height of the overflow through the channel wall and the effective critical flow depth on the dimensionless current channel length have been obtained for various values of the acting force parameters and the process parameter of the fluid overflow through the channel wall. This made it possible to study the dynamics of changes in these values along the channel for various values of the specified parameters, and to assess the degree of influence of the relevant factors on the characteristics of the pressureless flow along the channel and the process of fluid overflow through wall. Originality. For the first time, the model of the pressureless flow in the channel is generalized for the case of occurrence in some areas of overflow layer through the wall, when the length and height of the overflow layer are not determined by a hole in the side surface, but are controlled by a decrease in the corresponding flow rate. For the first time, this model makes it possible to calculate the height and length of the overflow layer and the change in the flow rate in the channel due to the withdrawal of part of the fluid as a result of the overflow in cases of overflowing condition of the channel with the stream under unstable and non-calculated flow regimes. Practical implications. The mathematical model and the calculation results can be used to ensure the environmental safety of the logistics systems of mining enterprises, as well as to assess the volume of the environmental pollution in case of overflowing through the wall of the channels of pressureless hydraulic transportation of waste from mineral processing and metallurgical plants.

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“…When constructing a model for the homogeneous fluid flow in a channel, the following assumptions are used [24], [26], [33]- [35] (Figs. 1-3):…”

Section: Methodsmentioning

confidence: 99%

Section: Figure 1 Longitudinal Channel Section With Normal Pressurele...mentioning

confidence: 99%

Section: Figure 1 Longitudinal Channel Section With Normal Pressurele...mentioning

confidence: 99%

See 1 more Smart Citation

Research into the pressureless flow in hydrotechnical systems at mining enterprises

Semenenko¹,

Medvedieva²,

Medianyk³

et al. 2023

Min. miner. depos.

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The resource-saving technology to restore the accumulation ability of tailing ponds

et al. 2020

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The accumulating capacity of tailing ponds by technology infusion of pulp preliminary clarification in the alluvium charts with its subsequent thickening and storage in the form of a highly concentrated pulp at the bottom of the pond is proposed by authors in the work. For the first time, the time dependence of filling a temporary pond on the ratio of the initial and condensed slurry concentrations for such technologies is obtained. The formula for calculating the degree of condensation is proposed. It provides the parameters selection and justification of equipment for removing water from a temporary pond as the map is filled with the accumulating capacity restoration of tailing ponds. The calculation results for the proposed dependencies allow us to establish: the necessary values of the thickening degree of the hydromixture, the possible intervals of the change in the pulp flow before and after thickening, as well as the volume of water taken from the temporary pond, depending on the concentration of the slurry entering the pond from the alluvium maps, its volumetric flow rate , geometric parameters of the technology for waste storage and the operation duration of a temporary pond.

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The calculation of parameters and modes of hydrotransport in the development of man-made deposits in the storage of waste products

Cited by 2 publications

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Research into the pressureless flow in hydrotechnical systems at mining enterprises

Research into the pressureless flow in hydrotechnical systems at mining enterprises

The resource-saving technology to restore the accumulation ability of tailing ponds

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