Explosive Fragmentation of Rock Masses with Heterogeneous Structure
- Ekvist B.V., Barnov N.G.
National Research Technological University «МISiS», Moscow, Russian Federation
Russian Mining Industry №3 / 2021 р. 135–138
Abstract: A method to optimize drilling and blasting parameters with account of the physical and technical properties of rocks within the blasted block is proposed to improve the quality of blasting in open pit mines characterized by complex geological settings. The results of laboratory tests are provided that confirm improvement in the quality of rock sample crushing by blasting charges with variable delays and locations, depending on the strength properties of the samples, relative to blasting charges with unchanged parameters. The proposed method can be used in combination with GPR surveys of the rock mass. Explosive fragmentation of the rock masses with complex structures is characterized with a number of features caused by changes in the strength properties within the blasted block. In order to optimize the fragmentation efficiency of rock masses with complex geological structure, it is required to assess physical and technical properties of rocks and to determine their location and variations of the strength properties within the blasted block. It is possible to quickly assess the physical and technical properties of the blasted rocks using the surface georadar method. The outcome of this method is georeferencing of the reoradar data to the location and properties of the rocks to be blasted, along with the methodology of applying the georadar surveys, selection of the areal assembly type depending on the size and properties of detected jointing, and economic justification of applying this method. The novelty consists in linking the georadar data on the rocks to be blasted with drilling and blasting parameters.
Keywords: rock masses with complex structure, ground penetrating radar, georadar survey, gradient, strength properties of rocks, drilling and blasting parameters, blast results
Acknowledgements: We acknowledge Nikolay P. Semeykin, General Director of the Logis Geotech Company, the developer of georadars.
For citation: Ekvist B.V., Barnov N.G. Explosive Fragmentation of Rock Masses with Heterogeneous Structure. Gornaya promyshlennost = Russian Mining Industry. 2021;(3):135–138. (In Russ.) DOI: 10.30686/1609-9192-2021-3-135-138.
Article info
Received: 17.04.2021
Revised: 20.05.2021
Accepted: 01.06.2021
Information about the authors
Boris V. Ekvist – Dr. Sci. (Eng.), Associate Professor, Professor, National Research Technological University “МISiS”, Moscow, Russian Federation; e-mail: еThis email address is being protected from spambots. You need JavaScript enabled to view it.
Nikolai G. Barnov – Cand. Sci. (Eng.), Associate Professor, National Research Technological University “МISiS”, Moscow, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
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