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.

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:,
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:
1 JSC «Orica CIS», Moscow, Russia.

For contacts:

V. A. Belin, e-mail:


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