Authors: V.N. Filippov, E.A. Khristolyubov, A.V. Volkov

Title of the article: Determination of the optimum parameters of the distribution of fan borehole charges of explosives when breaking blocks

Year: 2023, Issue: 2, Pages: 92-100

Branch of knowledge: 2.8.8 Geotechnology, mining machines

Index UDK: 622.271

DOI: 10.26730/1999-4125-2023-2-92-100

Abstract: A technological scheme for mining the Sheregeshevsky deposit has been determined, which makes it possible to ensure the design productivity, efficiency and safety of mining operations. The influence of the lumpiness of the exploded rock mass on the economic indicators of technological processes has been established. The parameters of fan borehole charges of explosives were determined during explosive breaking for various sizes of a standard piece during sublevel ore caving. It has been established that with an increase in the average distance between fractures, the value of the fracturing coefficient increases, and with an increase in the size of a conditioned piece, it decreases. The influence of rock strength and the size of a standard piece on the specific consumption of explosives is determined. The calculation of the coefficient taking into account the fracturing of the massif and the required size of the conditioned piece, as well as the specific consumption of explosives at various values of this coefficient was made. The value of the line of least resistance for different rock hardness and size of a standard piece is given. With an increase in the hardness of rocks, the line of least resistance decreases, and with an increase in the size of a conditioned piece, it increases. Schemes of charge distribution in fan wells have been developed. An analysis was carried out during fan explosive breaking, the optimal method of blasting fans for the conditions of the Sheregeshskaya mine and the delay interval between fans were determined

Key words: Standard piece specific consumption line of least resistance explosive charge distribution scheme in fan wells fracturing hardness

Receiving date: 01.03.2023

Approval date: 10.05.2023

Publication date: 15.06.2023

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