Performance of tubular elastic charges in natural stone production

In Russia like in any part of the world, dimension stone is a critical construction material, in particular, decorative stone is the main material which our rich cultural heritage is made of. Nonetheless, the dimension stone industry encounters new challenges governed by the economic expediency and environmental constraints. This article reviews the current world market of construction materials and dimension stone. The existing methods of high-quality production and its yield enhancement are discussed. The waste produced at each stage of dimension stone production is evaluated. The main requirements of blasting in hard dimension stone production are listed. The article describes the type of explosives to ensure low-velocity explosion transformation mode which minimizes the induced jointing zone around blastholes in stone separation from solid rock mass. The mechanism of selectively detonating charges is studied using the high-speed photography. The optimal sizes and main characteristics of tubular elastic charges are determined. It is shown that the described-design charges allow wide-range adjustment of the dynamics and time of explosive impulse in blastholes. The research findings can further enable modeling of stress fields in rocks during their directional splitting.

Kovalevsky V. N., Mysin A. V. Performance of tubular elastic charges in natural stone production. MIAB. Mining Inf. Anal. Bull. 2023;(1):20-34. [In Russ]. DOI: 10.25018/ 0236_1493_2023_1_0_20.

V.N. Kovalevsky¹, Cand. Sci. (Eng.), Assistant Professor, e-mail: vladimir_kovalevskiy@mail.ru, ORCID ID: 0000-0002-7155-2000,
A.V. Mysin¹, Cand. Sci. (Eng.), Senior Lecturer, e-mail: Mysin_AV@pers.spmi.ru, ORCID ID: 0000-0001-5968-8290,
¹ Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.

V.N. Kovalevsky, e-mail: vladimir_kovalevskiy@mail.ru.

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