Blast-induced damage zone studies in sedimentary rock mass

The studies aim to determine parameters of damaged zones induced by blasting in sedimentary rock mass. A feature of sedimentary rock mass is the developed systems of joints both in vertical and horizontal planes, which substantially affect blasting efficiency. Understanding the patterns of growth of damage zones induced by blasting allows eliminating excessive fracturing and enables maximum possible preservation of initial strength of rocks in dimension stone and crushed stone production. The study is based on the work experience gained in the laminated and jointed carbonate rock mass in the Russian Platform. The theoretical provisions and the experimental data on blasting-induced damage mechanisms in anisotropic sedimentary rock masses are generalized. Using the patterns of jointing propagation in sedimentary rocks mass, the in-situ measurements and the experimental blasting data, the sizes of zones damaged with radial cracks were determined in carbonate rock mass. Then, using the methods of dimension stone separating from carbonate rock mass by wire sawing and excavation, the blasting-induced damage zone sizes were refined. Some pre-recommendations on improvement of preparatory blasting techniques in sedimentary rock mass are given.

Kolotovkin A. S., Zelenin D. P., Levchenko Ya. V. Blast-induced damage zone studies in sedimentary rock mass. MIAB. Mining Inf. Anal. Bull. 2023;(12):41-54. [In Russ]. DOI: 10.25018/0236_1493_2023_12_0_41.

A.S. Kolotovkin¹, Graduate Student, e-mail: kolotovkin1904@mail.ru,
D.P. Zelenin¹, Director, JSC «Chernigovets», e-mail: d.p.zelenin@chernigovets.ru,
Ya.V. Levchenko¹, Cand. Sci. (Eng.), Assistant Professor, e-mail: levchenko.mggu@mail.ru, ORCID ID: 0000-0002-2080-6330,
¹ Mining Institute, National University of Science and Technology «MISiS», 119049, Moscow, Russia.

A.S. Kolotovkin, e-mail: kolotovkin1904@mail.ru.

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