Test bench and studies of rock fracture mechanism in cutting potassium blocks

The article gives essential elements of information on rock fracture by mining cutter picks. This process should be considered as a random process described by the associated characteristics which are possible to evaluate quantitatively using an experimental method of research, for instance, bench testing. Accordingly, design and manufacture of test benches for the experimental analysis of rock fracture process in cutting is a relevant theoretical and practical problem. The test bench and procedure of determining force and energy parameters of rock fracture by a single cutting pick are described. It is shown that the main parameter that influences the process of cutting is a ratio of the pick spacing to the depth of cut. The bench testing results on fracture of potassium blocks by a single cutting pick allowed determining the average cutting force on the single pick, the specific energy input and the mass fraction of particle size of –0.25 mm against the depth of cut. The optimum range of the pick spacing/depth of cut ratio at the minimum specific energy in fracture of potassium blocks by a single cutting pick is identified.

Shishlyannikov D. I., Gribov D. S., Prosovskiy K. A., Tyubeev I. H., Sitnikov D. A. Test bench and studies of rock fracture mechanism in cutting potassium blocks. MIAB. Mining Inf. Anal. Bull. 2024;(10):78-91. [In Russ]. DOI: 10.25018/0236_1493_2024_10_0_78.

The study was supported by the Ministry of Science and Higher Education of the Russian Federation, Project No. FSNM-2023-0005).

D.I. Shishlyannikov¹, Dr. Sci. (Eng.), Assistant Professor, Professor, e-mail: dish844@gmail.com,
D.S. Gribov², Head of the Mining Department, e-mail: dmitriy.gribov@mail.ru,
K.A. Prosovskiy², Leading Engineer, e-mail: prosovskij86@mail.ru,
I.H. Tyubeev¹, Educational Master, e-mail: tyubeev2001@mail.ru,
D.A. Sitnikov¹, Laboratory Assistant, e-mail: stdm2023@mail.ru,
¹ Perm National Research Polytechnic University, 614990, Perm, Russia,
² JSC «VNII Galurgy», 198216, Saint-Petersburg, Russia,

D.S. Gribov, e-mail: dmitriy.gribov@mail.ru.

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