Influence of axial air channel in holes with emulsion explosives on blasting efficiency

Authors: Оверченко М. Н., Мозер С. П., Толстунов С. А., Белин В. А.

The main characteristics of modern emulsion explosives (EE) are presented. The advantages and application of EE in industry are described. The EE application conditions resulting in nonstationary detonation of elongated blasthole charges are determined. It is found how stemming affects the blast quality and environment. The engineering decision aimed to improve efficiency of EE by deflagration is justified. The experimental explosion of EE charge with axial hollow channel along the whole length of the charged interval of the blasthole is described. It is found that the axial hollow channel ensures stable detonation of EE charge and has no influence on the detonation wave in the initial period of explosion after actuation of an intermediate primer. The recommendations on detonation rate for intermediate primers for initiation of low-disruptive explosives are given. The channel does not perturb the mechanism of blasting. It is found that during EE blasting, the detonation is stable along the whole length of the blasthole under testing. The obtained results can essentially improve efficiency of EE in blasting of rocks.

Keywords: Blasting, explosives, axial air channel, deflagration, detonation wave, rock, fracture, initiation techniques.
For citation:

Overchenko M. N., Mozer S. P., Tolstunov S. A., Belin V. A. Influence of axial air channel in holes with emulsion explosives on blasting efficiency. MIAB. Mining Inf. Anal. Bull. 2020;(1):61-70. [In Russ]. DOI: 10.25018/0236-1493-2020-1-0-61-70.

Acknowledgements:
Issue number: 1
Year: 2020
Page number: 61-70
ISBN: 0236-1493
UDK: 622.235
DOI: 10.25018/0236-1493-2020-1-0-61-70
Article receipt date: 17.07.2019
Date of review receipt: 16.09.2019
Date of the editorial board′s decision on the article′s publishing: 20.12.2019
About authors:

M.N. Overchenko1, Cand. Sci. (Eng.), General Director,
e-mail: sergey.mozer@Орика.com,
S.A. Tolstunov, Cand. Sci. (Eng.), Head of Department,
International Academy of Ecology, Man and Nature (IAEMN),
Saint-Petersburg, Russia, e-mail: tsaa09@mail.ru,
S.P. Mozer1, Cand. Sci. (Eng.), Training Superintendent,
e-mail: sergey.mozer@Орика.com,
V.A. Belin, Dr. Sci. (Eng.), Professor, Mining Institute,
National University of Science and Technology «MISiS»,
119049, Moscow, Russia,
President ANO NOIV, e-mail: bvamggu@mail.ru.
1 JSC «Orica CIS», Moscow, Russia.
 

For contacts:

V. A. Belin, e-mail: bvamggu@mail.ru.

Bibliography:

1. Sakerin A. S., Konstantinov D. O., Kozyrev S. A., Overchenko M. N. Emulsion explosives, charging equipment and blasting technologies for underground mining. Gornyy zhurnal. 2014, no 10, pp. 38—41. [In Russ].
2. Vozgrin R. A., Moldavan D. V., Kazantsev V. A. Sizing of control fragmentation zone in blasting of emulsion explosives in blastholes in open pit of Semizerskoe Open Pit Management. Marksheyderskiy vestnik, 2015, no 2, pp. 7—9. [In Russ].
3. Gorinov S. A., Kuprin V. P., Maslov I. Yu. Shock initiation of emulsion explosives sensitized by gas pores, or creeping detonation wave. Gornyy informatsionno-analiticheskiy byulleten’. 2013, no 12, 20 p. [In Russ].
4. Paramonov G. P., Vozgrin R. A. Justification of intermediate primer weight in initiation of blasthole charges of emulsion explosives. Vzryvnoe delo. 2014, no 112—69, pp. 223—234. [In Russ].
5. Bondarenko I. V., Khon V. I., Nikitin R. Ya. Features of application of emulsion explosives in open pit kimberlite mines of ALROSA. Materialy nauchno-tekhnicheskoy konferentsii «Razvitie resursosberegayushchikh tekhnologiy vo vzryvnom dele» [Materials of the scientific and technical conference «Development of resource-saving technologies in blasting»], October 12—14, 2011. Ekaterinburg, IGD UrO RAN, 2012, pp. 155—163. [In Russ].
6. Gorinov S. A. Goffering instability of detonation waves in emulsion explosives sensitized by gas pores. Materialy nauchno-tekhnicheskoy konferentsii «Razvitie resursosberegayushchikh tekhnologiy vo vzryvnom dele» [Materials of the scientific and technical conference «Development of resource-saving technologies in blasting»], October 12—14, 2011. Ekaterinburg, IGD UrO RAN, 2012, pp. 163—171. [In Russ].
7. Mendes R., Ribeiro J., Plaksin I., Campos J., Tavares B. Differences between the detonation behavior of emulsion explosives sensitized with glass or with polymeric microballoons. Journal of Physics: Conference Series. 2014, Vol. 500, Part 5, pp. 052030. DOI: 10.1088/1742- 6596/500/5/052030.
8. Lei Liu, Zhihua Zhang, Ya Wang, Hao Qin Experimental study on the influence of chemical sensitizer on pressure resistance in deep water of emulsion explosives. IOP Conference Series: Earth and Environmental Science, 2018, Vol. 128, pp. 012137. DOI: 10.1088/1755-1315/128/1/012137.
9. Agrawal H., Mishra A. A study on influence of density and viscosity of emulsion explosive on its detonation velocity. Modelling, Measurement and Control C. 2018, Vol. 78(03), pp. 316—336.
10. Mertuszka P., Cenian B., Kramarczyk B., Pytel W. Influence of explosive charge diameter on the detonation velocity based on emulinit 7L and 8L bulk emulsion explosives. Central European Journal of Energetic Materials, 2018, Vol. 15, pp. 351—363. DOI: 10.22211/cejem/78090.
11. Arvind Kumar Mishra, Manamohan Rout, Deepanshu Ranjan Singh, Sakti Pada Jana Influence of gassing agent and density on detonation velocity of bulk emulsion explosives. Geotechnical and Geological Engineering. 2018, Vol. 36, Issue 1, pp. 89—94.
12. Bordzilovskii S. A., Karakhanov S. M., Plastinin A. V., Rafeichik S. I., Yunoshev A. S. Detonation temperature of an emulsion explosive with a polymer sensitizer. Combustion, Explosion and Shock Waves, 2017, Vol. 53, Issue 6, pp. 730—737. DOI: 10.1134/S0010508217060156.
13. Yukhanson K., Person P. Detonatsiya vzryvchatykh veshchestv [Detonation of explosives], Moscow, Mir, 1973, 352 p.
14. Salganik V. A., Vorotelyak G. A., Mitrofanov V. V., Filippov N. F. Skvazhinnye zaryady vzryvchatykh veshchestv s osevoy vozdushnoy polost'yu [Blasthole charges with axial air cavities], Kiev,Tekhnika, 1986, 88 p.
15. Rodionov V. N. Enhancement of blasting effect in solid medium. Vzryvnoe delo. 1963, no 51-8, pp. 50—61. [In Russ].
16. Rodionov V. N., Khristoforov B. D. Vliyanie svoystv istochnika na deystvie vzryva v vode i vozdukhe [Influence of source properties on blasting effect in water and air], Moscow, 1962, 119 p.
17. Khristoforov B. D. Underwater explosion in air cavity. Prikladnaya mekhanika i tekhnicheskaya fizika. 1962, no 6, pp. 54—119. [In Russ].
18. Khanukaev A. N. Fizicheskie protsessy pri otboyke gornykh porod vzryvom [Physical processes during blasting of rocks], Moscow, Nedra, 1974, 224 p.
19. Belin V. A., Kutuzov B. N., Ganopol'skiy M. I., Overchenko M. N., Strogiy I. B. Tekhnologiya i bezopasnost' vzryvnykh rabot. Pod red. V.A. Belina [Blasting technology and safety. Belin V.A. (Ed.)], Moscow, Izd-vo «Gornoe delo» OOO «Kimmeriyskiy tsentr», 2016, 424 p.
20. Makar'ev V. P. Statisticheskie modeli vzryvnogo razrusheniya i metody issledovaniya kuskovatosti [Statistical models of blasting and methods to analyze fragmentation], Leningrad, izd. LGI, 1981, 87 p.
21. Togunov M. B., Sapronov E. M., Shchukin Yu. G., etc. Improvement rock blasting efficiency with emulsion explosives. Blasting technology and safety. Materialy nauchno-tekhnicheskoy konferentsii «Razvitie resursosberegayushchikh tekhnologiy vo vzryvnom dele» [Development of Resource- Saving Blasting Technologies: Scientific and Technical Conference Proceedings], October 12—14, 2011. Ekaterinburg, IGD UrO RAN, 2012, pp. 123—133. [In Russ].
22. Dang Van Kien. Investigation blasting vibration during excavation tunnel by drilling and blasting method in the urban conditions by two-dimension model. Journal of mining industrial. Ha Noi. 2014. No 6. Pp. 7—12.
23. Jinxing Lai, Haobo Fan, Jianxun Chen, Junling Qiu, Ke Wang. Blasting vibration monitoring of undercrossing railway tunnel using wireless sensor network. International Journal of Distributed Sensor Networks. 2015. No 2, pp. 1—7.
24. Žganec S., Bohanek V., Dobrilović M. Influence of a primer on the velocity of detonation of ANFO and heavy ANFO blends. Central European Journal of Energetic Materials. 2016. Vol. 13. No 3, pp. 694—704.
25. Sapronov E. M., Berdov S. P., Belin V. A., Astakhov E. O. Improvement of rock breaking efficiency based on the tests of explosive detonation rates by the method of reflectometry. Gornyy zhurnal. 2012, no 9/1, pp. 46—50. [In Russ].
26. Overchenko M. N., Tolstunov S. A., Mozer S. P. Patent RU 175903U1, 22.12.2017.

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