Influence of the explosion of a borehole charge with a radial gap on the quality of destruction of diamond-bearing ore

The modern approach to the production efficiency of diamond mining enterprises is increasingly focused on the quality of the produced marketable products due to the high cost of crystals and the irreversibility of their damage. At the same time, the technogenic damage of diamond products depends on many factors of production. Given the high dynamics of the explosion process, on the one hand, and the increased fragility of diamond crystals, on the other hand, it is quite appropriate to assume that diamond crystals can be damaged when they enter a certain area of explosive destruction in a rock mass. It is possible to increase the safety of mined diamonds through the use of core explosive charges with a radial gap, the use of which will allow controlling the stressed state of the massif, reducing the size of zones with an increased risk of crystal damage while maintaining the total volume of destruction of the host rock. Purpose of the study, was the development of crystal-saving technology using borehole charges with a radial gap. The article discusses the impact of borehole charge explosions on the quality of the destruction of a rock mass and the safety of the crystals contained in it, considers the existing methods for the preservation of rough diamonds, proposes a crystalsaving technology for drilling and blasting, and also presents the results of industrial testing of the proposed technology, using the developed special device for formation of a charge with a radial gap.

Keywords: Explosive destruction, kimberlite ore, safety of diamonds, charge formation, shock wave attenuation, active blast control methods, radial gap, holding device.
For citation:

Ziryanov I. V., Bondarenko I. F., Kovalevich S. V., Kim S. I. Influence of the explosion of a borehole charge with a radial gap on the quality of destruction of diamond-bearing ore. MIAB. Mining Inf. Anal. Bull. 2022;(5—2):58—71. [In Russ]. DOI: 10.25018/0236_1493_2022_52_0_58.

Issue number: 5
Year: 2022
Page number: 58-71
ISBN: 0236-1493
UDK: 622.235
DOI: 10.25018/0236_1493_2022_52_0_58
Article receipt date: 18.02.2022
Date of review receipt: 14.03.2022
Date of the editorial board′s decision on the article′s publishing: 10.04.2022
About authors:

Ziryanov I. V., Dr. Sci. (Eng.), Deputy Director for scientific work of the «Yakutniproalmaz» Institute of ALROSA PJSC, e-mail:, Head of the Department of Mining and Oil & Gas at Mirny Polytechnic Institute (Branch) of M. K. Ammosov NorthEastern Federal University, ORCID 0000-0003-4346-6671;
Bondarenko I. F., Cand. Sci. (Eng.), Scientific Secretary of «Yakutniproalmaz» Institute of ALROSA PJSC, 39 Lenina St., Mirny, Republic of Sakha (Yakutia), 678175, e-mail:, ORCID 0000-0002-9414-2661;
Kovalevich S. V., Cand. Sci. (Eng.), Head of the Rock Destruction Sector of the «Yakutniproalmaz» Institute of ALROSA PJSC, 39 Lenina St., Mirny, Republic of Sakha (Yakutia), 678175, e-mail:, ORCID 0000-0003-1087-0395;
Kim S. I., research associate, e-mail:, ORCID 0000-0003-3849-0298, «Yakutniproalmaz» Institute of ALROSA, 39 Lenina St., Mirny, Republic of Sakha (Yakutia), 678175.


For contacts:

Kim S. I., e-mail:


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