An energy-efficient and environment-friendly method for normalizing the microclimate in heated mineshaft compartments

Authors

DOI:

https://doi.org/10.15587/1729-4061.2016.65087

Keywords:

ventilation, microclimate, mathematical model of heat exchange, turbulent jet, vortex effect, cooling, compressed air

Abstract

Underground mineshaft compartments with non-effective ventilation and heat output from mining facilities form an unfavourable microclimate that negatively affects the efficiency of work and the health of miners. Studies of the actual state of the microclimate conditions in the drainage units of the Kryvbas mines show that when two or three pumping units operate simultaneously, the air temperature in them reaches 36-38°C and the air velocity fluctuates within 0.2–0.3 m/s. Removal of warm air from the pumping unit is aggravated by lack of special ventilation openings and drop of pressure at the inlet and outlet of the unit.

To solve the problem of normalizing the microclimate in underground mine compartments with operating facilities, we modelled mathematically the process of cooling with the help of a pneumatically-vortex device (PVD). The mathematical model describes changes in thermal and physical properties of the cooled air stream formed by the PVD as well as allows determining its basic parameters – long range xmax=34.9 m and diameter 2rmax=12.58 m – and studying the temperature field of the stream. We have used the mathematical modelling to develop a program of regulating the microclimate in underground mine compartments that are provided with heat sources. The model is coded in the programming language Visual Basic for Applications Microsoft Excel and has a simple interface. The use of this program allows adjusting the parameters of the microclimate in mineshaft compartments in two modes – Airing and Cooling – with an optimal use of the compressed air and ventilation air.

The research findings presented in the article have been introduced in industrial conditions – in the pumping units of the Lenin Mine PJSC Kryvbaszalizrudkom and the Artem Mine PJSC ArselorMittal Kryvyi Rih (Ukraine).

Author Biography

Daria Lapshina, Kryvyi Rih National University 37 Pushkin str., Kryvyi Rih, Ukraine, 50002

Postgraduate student

Department of Mine Aerology and Labor Safety 

References

  1. Stupnik, M. I., Pysmennyi, S. V. (2012). Combined methods of further development of Krivbass iron ore deposits. Journal of Kryvyi Rih National University, 95 (1), 3‑7.
  2. Unified Rules of safety at underground mining method (1977). Moscow, USSR: Nedra, 225.
  3. Lapshyn, A. E., Nemchenko, A. A., Konovalyuk, V. A., Lapshina, D. A. (2012). The heat exchange between the water of mine collectors and air. Journal of Kryvyi Rih National University, 33, 94–96.
  4. Lapshyn, A. E., Nemchenko, A. A., Konovalyuk, V. A., Lapshina, D. A. (2013). Studies of air exchange in the chambers with heat sources. Journal of Kryvyi Rih National University, 34, 235‑238.
  5. Nemchenko, A. A., Lapshina, D. A. (2012). Microclimate normalization in the underground chambers of mines. Sustainable development of industry and society, International Conference, 252–253. doi: 10.1201/9781439833391.ch36
  6. Johnson, O. S. (2006). Thermo- and psychrometric properties of intake air passing through fragmented strata. 11-th U.S./North American Mine Ventilation Symposium, 251–259.
  7. Boyko, V. A., Boyko, A. V. To the question about the choice of method and means for normalizing the thermal conditions in preparatory mine workings of deep mines of Donbass in the period of their excavation. Scientific Bulletin of National mining university, 23–26
  8. Lapshyn, A. A. (2014). Industrial studies of the microclimate and the condition of mine ventilation in deep ore mines. Metallurgical and mining industry, 1, 76–79.
  9. Alekseenko, S. A., Shaihlislamova, I. A. (2012). Classification of methods and means of regulation of a thermal mode in mines Sustainable development and artificial cold, 501–505.
  10. Bluhm, S., von Glehn, F. (2004). Important basics of mine ventilation and cooling planning. Journal Mine Ventilation Society South Africa, 57 (1), 15–24.
  11. Akande, J. M., Moshood, O. (2013). Modelling of Okaba Underground Coal Mine Ventilation System. International Journal of Engineering and Technology, 3 (7), 766‑772.
  12. Marx, W, von Glehn, F., Wilson, R. W. (2006). Design of energy efficient mine ventilation and cooling systems. 8th U.S./North American Mine ventilation Symposium, 641‑648. doi: 10.1201/9781439833391.ch39
  13. Belle, B. K. (2008). Energy savings on mine ventilation fans using ‘Quick-Win' Hermit Crab Technology-A perspective. 12th U.S./North American Mine ventilation Symposium, 427‑433.
  14. Ratner, G., Viviers, S. (2013). Underground auxiliary ventilation monitoring and diagnostic system. The Australian Mine Ventilation Conference, 57–62.
  15. Rawlins, C. (2004) Underground mine heat loads and associated reduction methodologies. Journal Mine Ventilation Society South Africa, 57 (1), 25–30.
  16. Lapshyn, O. E., Lapshyn, O. O., Dengub, V. I. (2012). Patent for useful model № 71139. Lapshyn’s cooling ejector. Applicant and the patentee Kryvyi Rih National University. № u201200123. applicant 04.01.2012; published 25.07.2012, 14.
  17. Lapshyn, O. E., Lapshyn, O. O., Galinskyi, V. S. (2012). Patent for useful model № 71727. Lapshyn’s hydraulic nozzle. Applicant and the patentee Kryvyi Rih National University. № u20111391. applicant 07.11.2011; published 10.07.2012, 13.
  18. Lapshyn, O. O. Lyashenko, V. I. (2014). Improvement of efficiency of mine air cooling with use of nozzle irrigation. Non-ferrous metallurgy, 1, 8–14.
  19. Lapshyn, O. O. (2014). Air cooling with use of mine water. Mining journal, 5, 13–17.
  20. Alabiev, V. R. (2004). Formation of refrigerant dangerous concentrations in mines during exploitation of mine refrigeration. The ways and means of establishing a safe and healthy working conditions in coal mines, 1, 184–190.
  21. Tinina, S. V. (2009). About increase of efficiency of local systems of conditioning deadlock development workings of deep mines. Geotechnical mechanics, 82, 211–219.
  22. Gerasimenko, G. P. (1971) Integrated use of pneumatic energy during the mining of deep deposits. Мoscow: Nedra, 7–16.
  23. Ranque, G. J. (1933). Experiments on expansion in a vortex with simultaneous exhaust of hot air and cold air. J Phys Radium (Paris), 4, 112–114.
  24. Perepelitsa, V. G., Tinina, S. V. (2008). To the question about the possibility of using vortex coolers in the creation of air conditioning systems deadlock deep mine workings. Geotechnical mechanics, 77, 154–159.
  25. Chang, K., Li, Q., Zhou, G., Li, Q. (2011). Experimental investigation of vortex tube refrigerator with a divergent hot tube. International Journal of Refrigeration, 34 (1), 322–327. doi: 10.1016/j.ijrefrig.2010.09.001
  26. Nian, L., Zheng, W., Xiaohong, H., Guangming, C. (2014) Experimental study of the Couple Characteristics of the Refrigerants and Vortex Tube. International Refrigeration and Air Conditioning Conference, 15–18.
  27. Volkov, K. N., Emelyanov, V. N., Zazimko, V. A. (2013). Turbulent jet – statistical models and large vortices simulation. Moscow: Fizmatlit, 360.
  28. Abramovich, G. N. (1960). The theory of turbulent jets. Moscow: Fizmatgiz, 652.

Downloads

Published

2016-04-11

How to Cite

Lapshina, D. (2016). An energy-efficient and environment-friendly method for normalizing the microclimate in heated mineshaft compartments. Eastern-European Journal of Enterprise Technologies, 2(10(80), 32–39. https://doi.org/10.15587/1729-4061.2016.65087

Issue

Vol. 2 No. 10(80) (2016): Ecology

Section

Ecology

License

Copyright (c) 2016 Daria Lapshina

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.

A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.