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Model representation of the influence of hydraulic mixture backwater in the washout chamber on the hydraulic elevator lifting height

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Category: Content №2 2025

Last Updated on 26 April 2025

Published on 30 November -0001

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Authors:

Z.Malanchuk*, orcid.org/0000-0001-8024-1290, National University of Water and Environmental Engineering, Rivne, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V.Korniyenko, orcid.org/0000-0002-7921-2473, AGH University of Science and Technology, Krakow, the Republic of Poland

Ye.Malanchuk, orcid.org/0000-0001-9352-4548, National University of Water and Environmental Engineering, Rivne, Ukraine

A.Khrystyuk, orcid.org/0000-0002-5009-3140, National University of Water and Environmental Engineering, Rivne, Ukraine

W.Sobczyk, orcid.org/0000-0003-2082-9644, AGH University of Science and Technology, Krakow, the Republic of Poland

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2025, (2): 042 - 050

https://doi.org/10.33271/nvngu/2025-2/042

Abstract:

Purpose. To investigate the influence of hydraulic mixture backwater in the washout chamber on the lifting height of the hydraulic elevator and determine optimal operating parameters under significant submersion conditions.

Methodology. Experimental studies were conducted using hydraulic elevators with nozzles of 15, 20 and 25 mm diameters. The effects of working agent pressure, nozzle diameter, and jet immersion depth on productivity, energy intensity, and specific water consumption were evaluated. The experimental results were approximated using empirical dependencies and graphical analysis. The experimental results were approximated using empirical dependencies and graphical analysis to establish functional relationships between the system parameters.

Findings. It was found that the jet immersion depth under the rock layer significantly affects the hydraulic elevator’s performance. Experiments with nozzles of different diameters showed that for each diameter, there is a water pressure limit beyond which no significant increase in the delivery distance of the hydraulic mixture occurs. For nozzles with diameters of 15, 20 and 25 mm, the water pressure limits were 1.5, 2.0 and 2.5 MPa, respectively. Increasing the pressure and nozzle diameter improves the efficiency of rock washout and delivery distance but is accompanied by an increase in process energy intensity.

Originality. For the first time, dependencies of the hydraulic elevator’s productivity on jet immersion depth and working agent pressure for various nozzle diameters were established. Empirical models were developed to predict the efficiency of hydraulic mixture lifting under variable submersion conditions.

Practical value. The research results can be used to optimize the design and operation of hydraulic elevators under significant hydraulic mixture backwater conditions. A hydraulic elevator with the following parameters is recommended for lifting the hydraulic mixture to the surface: nozzle diameter – 25 mm, mixing chamber diameter and length – 70 and 150 mm, respectively; hydraulic elevator module – 8 mm; pulp collecting column diameter – 100 mm.

Keywords: hydraulic elevator, hydraulic mixture, submersion, washout chamber, productivity, energy intensity

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