Energy-constructive analysis of adaptation of borehole charges networks to blasting of complex structure arrays

D. Malykh, D. Titov, G. Eremenko
Received 01.06.2021, Revised 12.10.2021, Accepted 19.11.2021, Published 17.12.2021
Abstract

To determine the maximum possible adaptation of borehole charges of explosives to the structural features of rock massifs for more effective destruction by dispersing parts of the charge along the borehole and ensuring the cumulative effect of these parts. Research methods are to analyze of geological data on the iron-ore deposits of Kryvbass, project documentation, technological data of the mining enterprises and open pits, scientific publications and their subsequent synthesis and formulation of the developed provisions. Originality lies in the application of a comprehensive approach to solving the problem and a number of their own technical solutions. Scientific novelty lies in research of the influence of changes in the design and parameters of dispersed borehole charges on the intensity of destruction of the lower rock massifs. Practical significance is to develop new designs of borehole charges and methods for determining their parameters and applications. A study of the relationship between geological and technological conditions and dynamic processes in which the explosive destruction of crystalline rocks by interacting borehole charges, the designs of which were developed by the authors. This made it possible to establish rational modes of explosion energy distribution in the rock mass during the formation of borehole charges by using the coefficient m = 0.025f linear differentiation of their parts, which reduces the area of chaotic artificial structural breaches of the lower ledge under the action of explosion, which is mostly unregulated. The developed method differs from the known ones primarily in that individual parts of the charges are formed with cumulative radial elements. Thus, the maximum adaptation of charges to the features of structural and strength characteristics of the rock mass on the height of the ledge is achieved by dispersing parts of the charge, and azimuthal - the orientation of the cumulative vectors of the latter. Further development and production application of research results will significantly reduce the cost of iron ore products by increasing the efficiency of blasting operations in the open-pit.

Keywords:
ore; explosive destruction; open pit; blasting; borehole charges

Retrieved from Vol. 19, No. 2, 2021

Pages 131–136

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Malykh, D., Titov, D., & Eremenko, G. (2021). Energy-constructive analysis of adaptation of borehole charges networks to blasting of complex structure arrays. Journal of Kryvyi Rih National University, 19(2), 131-136. https://doi.org/10.31721/2306-5451-2021-1-53-131-136
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