Design method for perimeter control blasting in jointed rock mass at open pit mines

The literature analysis shows that designs of perimeter control blasting neglect some parameters which govern efficiency of the process. The aim of this study is to develop a method of perimeter control blasting in jointed rock mass in open pit mining in different geological and geotechnical conditions. New relations are developed to determine the spacing ap between the perimeter control blastholes and the safe weight p of explosive per 1 m of blasthole, including detonation characteristics of explosives, diameter of blastholes, physical and mechanical properties of rocks under rock pressure and rock mass jointing parameters. The calculation of ap and p is carried out as subjects of physical and mechanical parameters of rocks, blasthole diameter and rock mass jointing parameters. The calculated values of ap and p conform with the actual data obtained in perimeter control blasting in open pit mines and in Sukhoi Dok Massif of granite–gneiss. The further research is to be aimed at development of the perimeter control blasting design formulas with the rock hardness factor instead of the physical and mechanical properties of rocks.

Tyupin V. N. Design method for perimeter control blasting in jointed rock mass at open pit mines. MIAB. Mining Inf. Anal. Bull. 2024;(9):78-87. [In Russ]. DOI: 10.25018/ 0236_1493_2024_9_0_78.

The study was supported by the Ministry of Science and Higher Education of the Russian Federation, State Contract No. FZWG-2023-0011.

V.N. Tyupin, Dr. Sci. (Eng.), Professor, Belgorod State National Research University, 308015, Belgorod, Russia, e-mail: tyupinvn@mail.ru, ORCID ID: 0000-0002-3709-0957.

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