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Control of density and velocity of emulsion explosives detonation for ore breaking

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Category: Content №2 2021

Last Updated on 29 April 2021

Published on 30 November -0001

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Authors:

M.M.Kononenko, orcid.org/0000-0002-1439-1183, Dnipro University of Technology, Dnipro, Ukraine, email: This email address is being protected from spambots. You need JavaScript enabled to view it.

O.Ye.Khomenko, orcid.org/0000-0001-7498-8494, Dnipro University of Technology, Dnipro, Ukraine, email: This email address is being protected from spambots. You need JavaScript enabled to view it.

I.L.Kovalenko, orcid.org/0000-0002-7747-0911, Ukrainian State University of Chemical Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

M.V.Savchenko, Ltd IST-FORT, Kharkiv, Ukraine, 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. 2021, (2): 069 - 075

https://doi.org/10.33271/nvngu/2021-2/069

Abstract:

Purpose.Development of a new procedure for calculating the density of emulsion explosives (EE), that will allow determining the detonation velocity along the charging length, depending on the inclination of boreholes during ore breaking.

Methodology.A calculation method for the redistribution of EE density and mass in boreholes at different angles of inclination has been developed by using the well-known laws of hydrostatics. Measurement of the detonation velocity of the EE Ukrainit-PP-2B was conducted by using the method of polygon experimental tests. The numerical simulation of changes in the detonation velocity of explosives in boreholes was conducted by using the proposed method and established regularities.

Findings.Methods of calculation of EE density changing along the charging column length under the action of hydrostatic pressure at different angles of inclination of both ascending and descending boreholes have been developed. Based on experimental data, regularities of detonation rate changing from density and charge diameter for EE Ukrainit-PP-2B, varying according to exponential law have been established. The rational initial density of EE Ukrainit-PP-2B has been established for ores breaking by boreholes, which is equal to 8001000 kg/m³, at which the detonation rate along the length of the charge column at different angles of inclination of the boreholes is maintained. The obtained results will allow controlling density and detonation velocity during ore breaking.

Originality.The density of EE increases in the formed charging column under the action of hydrostatic pressure: in ascending boreholes from the face, while in descending boreholes from the brow.

Practical value.Application of the calculation results of EE density at different inclination angles of boreholes makes it possible to determine in the charge column sections with its critical values more than 1410 kg/m³, at which a sharp attenuation of the detonation rate begins. Consideration of this phenomenon makes it possible to prevent the occurrence of failures at the explosion of charges in boreholes during ore breaking.

Keywords:drilling-and-blasting operations, emulsion explosives, detonation velocity, charge length, charging cavity

References.

1. Lyashenko, V., Vorobev, A., Nebohin, V., & Vorobev, K. (2018). Improving the efficiency of blasting operations in mines with the help of emulsion explosives. Mining of Mineral Deposits, 12(1), 95-102. https://doi.org/10.15407/mining12.01.095.

2. Kholodenko, T., Ustimenko, Y., Pidkamenna, L., & Pavlychenko, A. (2015). Technical, economic and environmental aspects of the use of emulsion explosives by ERA brand in underground and surface mining. New Developments in Mining Engineering, 211-219. https://doi.org/10.1201/b19901-38.

3. Lyashenko, V.I., Golik, V.I., & Dyatchin, V.Z. (2020). Increasing environmental safety by reducing technogenic load in mining regions. Izvestiya. Ferrous Metallurgy, 63(7), 529-538. https://doi.org/10.17073/0368-0797-2020-7-529-538.

4. Mironova, I., & Borysovska, O. (2014). Defining the parameters of the atmospheric air for iron ore mines. Progressive Technologies of Coal, Coalbed Methane, and Ores Mining, 333-339. https://doi.org/10.1201/b17547-57.

5. Khomenko, O., Kononenko, M., Myronova, I., & Savchenko, M. (2019). Application of the emulsion explosives in the tunnels construction. E3S Web of Conferences, 123, 01039. https://doi.org/10.1051/e3sconf/201912301039.

6. Myronova, I. (2015). The level of atmospheric pollution around the iron-ore mine. New Developments in Mining Engineering 2015, 193-197. https://doi.org/10.1201/b19901-35.

7. Myronova, I. (2016). Prediction of contamination level of the atmosphere at influence zone of iron-ore mine. Mining of Mineral Deposits, 10(2), 64-71. https://doi.org/10.15407/mining10.02.0064.

8. Gurin, A.A., & Lyashenko, V.I. (2018). Improvement of the Assessment Methods of the Effect of Mass Emissions in Pits on the Environment. Occupational Safety in Industry, (1), 35-41. https://doi.org/10.24000/0409-2961-2018-1-35-41.

9. Pysmennyi, S., Brovko, D., Shwager, N., Kasatkina, I., Paraniuk, D., & Serdiuk, O. (2018). Development of complex-structure ore deposits by means of chamber systems under conditions of the Kryvyi Rih iron ore field. Eastern-European Journal of Enterprise Technologies, 5(1(95)), 33-45. https://doi.org/10.15587/1729-4061.2018.142483.

10. Pysmennyi, S., Fedko, M., Shvaher, N., & Chukharev, S. (2020). Mining of rich iron ore deposits of complex structure under the conditions of rock pressure development. E3S Web of Conferences, 201, 01022. https://doi.org/10.1051/e3sconf/202020101022.

11. Sinitsyn, V.A., Menshikov, P.V., & Shemenev, V.G. (2016). Mathematical model of determination of density and aeration length hole charges of emulsion explosives the example Nitronit E-70. Advances in current natural sciences, (8), 205-210.

12. Bragin, P.A., Gorinov, S.A., Maslov, I.Y., Iliakhin,S.V., & Overchenko, M.N. (2015). On the density distribution in the charge of emulsion explosives sensitized with gas pores. Mining informational and analytical bulletin, (S5-20), 21-37.

13. Kozyrev, S.A., Vlasova, E.A., & Sokolov, A.V. (2020). Estimation of factual energetics of emulsion explosives by experimental detonation velocity test data. Gornyi Zhurnal, (9), 47-53. https://doi.org/10.17580/gzh.2020.09.06.

14. Gorinov, S.A., & Kutuzov, B.N. (2012). On the instability of detonation waves of the emulsion explosive with gassensitized cells. Mining informational and analytical bulletin, (4), 302-307.

15. Mertuszka, P., Cenian, B., Kramarczyk, B., & Pytel, W. (2018). Influence of explosive charge diameter on the detonation velocity based on Emulinit 7L and 8L bulk emulsion explosives. Central European Journal of Energetic Materials, 15(2), 351-363. https://doi.org/10.22211/cejem/78090.

16. Mertuszka, P., Fuawka, K., Pytlik, M., & Szastok, M. (2019). The influence of temperature on the detonation velocity of selected emulsion explosives. Journal of Energetic Materials, 38(3), 336-347. https://doi.org/10.1080/07370652.2019.1702739.

17. Mertuszka, P., & Kramarczyk, B. (2018). The impact of time on the detonation capacity of bulk emulsion explosives based on Emulinit 8L. Propellants, Explosives, Pyrotechnics, 43(8), 799-804. https://doi.org/10.1002/prep.201800062.

18. Falshtynskyi, V., Dychkovskyi, R., Khomenko, O., & Kononenko, M. (2020). On the formation of a mine-based energy resource complex. E3S Web of Conferences, 201, 01020. https://doi.org/10.1051/e3sconf/202020101020.

19. Khomenko, O., Rudakov, D., & Kononenko, M. (2011). Automation of drill and blast de-sign. Technical And Geoinformational Systems In Mining, 271-275. http://doi.org/10.1201/b11586-45.

20. Kononenko, M., Khomenko, O., Savchenko, M., & Kovalenko, I. (2019). Method for calculation of drilling-and-blasting operations parameters for emulsion explosives. Mining of Mineral Deposits, 13(3), 22-30. https://doi.org/10.33271/mining13.03.022.

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