The problem of reducing energy consumption in mining operations during the construction of the subway

The analysis of the process of electroosmotic water deposition in the soils surrounding the track structure during the construction of the subway is given. It is established that due to the fact that during the construction of the metro with the use of mining machines (tunneling shield), the structure of soils is violated and water-resistant and water-saturated layers are exposed, electroosmotic water deposition in them has its own characteristics. It is advisable to optimize the process according to the criterion of specific energy consumption for mass transfer. In this paper, based on the theories of electrokinetic phenomena and heat and mass transfer, the idea of using relaxation phenomena of the ionic atmosphere of a dispersed particle, a dispersion medium and heat-moisture fields in the volume of wet dispersed material fields to reduce energy consumption for the separation of loosely bound dispersion medium is developed. Based on the analysis of the totality of all physical phenomena occurring during the electrical compaction of the soil, it can be proposed to eliminate the energy transition to replace the power supply with direct electric current for the treatment of soil with other types of electrical energy, that is, to change the parameters of electrical energy and reduce relaxation losses. The energy balance of the process and the energy diagram, which differ from the known ones, the dependence of specific energy consumption not only on the magnitude of the active factors, but also on the duration of their superimposition, the methodology for studying the process of electroosmotic separation of wet dispersed material based on the criteria for evaluating the efficiency of specific energy consumption per unit mass of the separated dispersed medium or solid fraction are proposed — dispersed phase, methods for calculating electrokinetic devices using the coefficient of specific energy consumption, which is especially important to take into account in mining operations.

Porsev E. G., Latyshev R. N. The problem of reducing energy consumption in mining operations during the construction of the subway. MIAB. Mining Inf. Anal. Bull. 2022;(12-2):217—228. [In Russ]. DOI: 10.25018/0236_1493_2022_122_0_217.

LatyshevR. N.¹, Assistant, Junior Researcher of Research Unit, e-mail: latyshev @corp.nstu.ru, ORCID ID: 0000-0002-3920-8728;
PorsevE. G.¹, Dr. Sci. (Eng), senior research scientist, professor, e-mail: porsev@corp.nstu.ru, ORCID ID: 0000-0003-4807-5135;
¹ Novosibirsk State Technical University,630073, Novosibirsk, Russia.

Porsev E. G., e-mail: porsev@corp.nstu.ru.

1. Abramov B. I., Ivanov A. G., Shilenkov V. A., Kuzmin I. K., Shevyrev Y. V. Electric drive of modern mine hoisting machines. MIAB. Mining Inf. Anal. Bull. 2022, no. 5–2, pp. 145–162. [In Russ]. DOI: 10.25018/0236_1493_2022_52_0_145

2. Ryzhakov V. V., Kholudeneva A. O., Ryzhakov M. V. Research correlations electro and related processes. Intersectoral scientific and technical journal “Defence complex — scientific and technological progress of Russia”. 2015, no. 3, pp. 41–43. [In Russ].

3. Serov A. D., Aksenova I. V. The use of electroosmosis for protection of structures of historic builtdings against humidification in the course of reconstruction and restoration. Industrial and Civil Engineering. 2014, no. 6, pp. 54–57. [In Russ].

4. Pis’menskaya N. D., Nikonenko V. V., Mel’Nik N. A., Pourcelli G., Larchet G. Effect of the ion-exchange-membrane/solution interfacial characteristics on the mass transfer at severe current regimes. Russian Journal of Electrochemistry. 2012, vol. 6(48), pp. 610–628. [In Russ].

5. Sologaev V. I. About of the application of electroosmosis in protecting against underflooding of land. Bulletin of the Omsk SAU. 2017, vol. 3(27), pp. 122–129 [In Russ].

6. Kholudenevo A. O. The study of the characteristics of electroosmotic porous waste dehydration subject to the influence of the physical model of osmosis and voltage dynamics. Journal of Advanced Research in Dynamical and Control Systems. 2018, vol. 10 (10), pp. 2142–2146.

7. Ryzhakov V. V., Holudeneva A. O. Drying processes of wet materials: Environmental problem and choice of the theoretical, circuitry and experimental directions of their solutions. International Journal of Applied Engineering Research. 2017, vol. 12 (14), pp. 4638–4643.

8. Pai M. Y., Siddhartha S. Effect of Building Orientation and Window Glazing on the Energy Consumption of HVAC System of an Office Building for Different Climate Zones. International Journal of Engineering Research & Technology (IJERT). 2015, vol. 4 (9), pp. 838–843. DOI:10.17577/IJERTV4IS090754.

9. Mukherjee S., Dasgupta S., Chakraborty S., Dhar J. Patterned surface charges coupled with thermal gradients may create giant augmentations of solute dispersion in electroosmosis of viscoelastic fluids. Proceedings of the royal society a: mathematical, physical and engineering sciences. 2019, vol. 2221 (475), p. 42.

10. Chan F. S., Tan C. K., Ratnayake P., Junaidi M. U. M., Liang Y. Y. Reduced-order modelling of concentration polarization with varying permeation: Analysis of electro-osmosis in membranes. Desalination. 2020, vol. 495, p. 13. DOI:10.1016/j.desal.2020.114677.

11. Godinez-Brizuela O. E., Niasar V. J. Simultaneous pressure and electro-osmosis driven flow in charged porous media: pore-scale effects on mixing and dispersion. Journal of Colloid and Interface Science. 2019, vol. 561, pp. 162–172. DOI:10.1016/j.jcis.2019.11.084.

12. Ratnayake P., Bao J. Actuation of spatially-varying boundary conditions for reduction of concentration polarisation in reverse osmosis channels. Computers & Chemical Engineering. 2017, vol. 98, pp. 31–49. DOI:10.1016/j.compchemeng.2016.11.045.

13. Hideyuki S., Koshi U. Experimental demonstration of closing and opening motions of an elastic valve using induced charge electroosmosis in a flow. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2021, vol. 628, p. 7. DOI.org/10.1016/j. colsurfa.2021.127334.

14. Ling J., Han B., Xie Y., Dong Q., Sun Y., Huang B. Laboratory and field study of electroosmosis dewatering for pavement subgrade soil. J. Cold Reg. Eng. 2017, vol. 31. DOI. org/10.1061/(ASCE)CR.1943−5495.0000136.

15. Zhao X.-D., Liu Y., Gong W.-H. Analytical solution for one-dimensional electroosmotic consolidation of double–layered system. Computers and Geotechnics. 2020, vol. 122, p. 10. DOI:10.1016/j.compgeo.2020.103496.

16. Wang L., Wang Y., Liu S., Fu Z., Shen C., Yuan W. Analytical solution for onedimensional vertical electro-osmotic drainage under unsaturated conditions. Computers and Geotechnics. 2019, vol. 105, pp. 27–36. DOI:10.1016/j.compgeo.2018.09.011.

17. Zhang Y., Lian G., Dong C., Cai M., Song Z., Shi Y., Wei Z. Optimizing and understanding the pressurized vertical electro-osmotic dewatering of activated sludge. Process Safety and Environmental Protection. 2020, vol. 140, pp. 392–402. DOI:10.1016/j. psep.2020.05.016

18. Zhuang Y. Large scale soft ground consolidation using electrokinetic geosynthetics. Geotextiles and Geomembranes. 2021, vol. 49(3), pp. 757–770. DOI:10.1016/j. geotexmem.2020.12.006.

19. Cao B., Zhang Y., Shi Y., Ren R., Wu H., Zhang W., Wang D., Zhang T., Xiong J. Extracellular organic matter (EOM) distribution characteristic in algae electro-dewatering process. Journal of Environmental Management. 2020, vol. 265, p. 9. DOI:10.1016/j. jenvman.2020.110541.

20. Stepanenko V. P. On the issue of increasing resource saving at autonomous power plants in the Republic of Sakha Yakutia. MIAB. Mining Inf. Anal. Bull. 2018, no. 6, pp. 62–68. DOI: 10.25018/0236-1493-2018-6-0−62−68 [In Russ].