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Interplay of strengths of nonuniformities in coal seams

The current calculation procedures of optimal parameters of coal mining machines and their cutting tools use the coal strength criterion of coal cuttability which is intrinsically a weighted mean of cuttabilities of coal and dirt bands, and neglects large solid inclusions contained in coal, while they drastically affect the dynamic stress and serviceability of mining machinery. Researches show that a more exhaustive estimation of strength and dynamic behavior of structurally complex coal seam is possible using the proposed index of the dynamic cuttability of coal. Geological descriptions of nonuniformities contained in coal seams use, as a rule, the value of the hardness f on Protodyakonov’s scale and the ultimate compression strength σ com. The authors offer the empirical relations for the transition from these values to the cuttability criterion used in the current procedure of coal mining machine design. It is recommended to use the proposed relations in optimization designs of coal mining machines.

Keywords: coal seam, cuttability, solid inclusions, dirt bands, hardness, coal mining machine, parameter selection, dynamic stress.
For citation:

Linnik Yu. N., Linnik V. Yu., Zhabin A. B., Zich A. Interplay of strengths of nonuniformities in coal seams. MIAB. Mining Inf. Anal. Bull. 2023;(3):5-15. [In Russ]. DOI: 10.25018/0236_1493_2023_3_0_5.

Issue number: 3
Year: 2023
Page number: 5-15
ISBN: 0236-1493
UDK: 622.023.23
DOI: 10.25018/0236_1493_2023_3_0_5
Article receipt date: 06.09.2021
Date of review receipt: 18.01.2023
Date of the editorial board′s decision on the article′s publishing: 10.02.2023
About authors:

Yu.N. Linnik1, Dr. Sci. (Eng.), Professor,
V.Yu. Linnik1, Dr. Sci. (Econ.), Assistant Professor, Professor, e-mail:,
A.B. Zhabin, Dr. Sci. (Eng.), Professor, Tula State University, 300012, Tula, Russia, Full Member of Academy of Mining Sciences,
A. Zich, Dr. Sci. (Eng.), Energy and Environmental Management Representative, Ontex Hygieneartikel, Germany, Grospostwitz,
1 State University of Management, 109542, Moscow, Russia.


For contacts:

V.Yu. Linnik, e-mail:


1. Aksenov V. V., Koreshok A. A., Ananiev K. A., Ermakov A. N. Review and analysis of methods for determining the parameters of cutting executive bodies. Sbornik trudov XVI Mezhdunarodnoy nauchno-prakticheskoy konferentsii «Energeticheskaya bezopasnost' Rossii. Novye podkhody k razvitiyu ugol'noy promyshlennosti» [Proceedings of XVI International Scientific and Practical Conference «Energy Security of Russia. New Approaches to Development of the Coal Industry»], Kemerovo, Institut uglya SO RAN, 2014, pp. 92—94.

2. Zhabin A. B., Averin E. A., Polyakov A. V., Sarychev V. I. The state of scientific research in the field of rock destruction tool at the turn of the century. Izvestiya Tul'skogo gosudarstvennogo universiteta. Nauki o zemle. 2018, no. 1, pp. 230—247. [In Russ].

3. Mametev L. E., Khoreshok A. A., Tcekhin A. M., Borisov A. Iu. Investigation of the interaction of a cutting tool with a coal massif. Mining equipment and electromechanics. 2018, no. 6(140), pp. 34—40. [In Russ].

4. Zich A., Linnik Yu. N., Linnik V. Yu. Verlängerung der Betriebsdauer von Meiselhalterungen an schneidenden Kohlegewinnugsmaschinen. Mining Report 5. Gluckauf. 2017, no. 153, pp. 474—479.

5. Kuidong G., Changlong D., Hongxiang J., Songyong L. A theoretical model for predicting the Peak Cutting Force of conical picks. Fracture and Structural Integrity. 2013, vol. 8, no. 27, pp. 43—52. DOI: 10.3221/IGF-ESIS.27.06.

6. Sidorenko A. A., Sishchuk J. M., Gerasimova I. G. Underground mining of multiple coal seams: problems and solutions. Eurasian Mining. 2016, no. 2, pp. 11—15.

7. Zakharov V. N., Linnik V. Yu., Linnik Yu. N., Zhabin A. B. Classification of coal seams by features of geological structure and characteristics of breaking. MIAB. Mining Inf. Anal. Bull. 2019, no. 5, pp. 5—12. [In Russ]. DOI: 10.25018/0236-1493-2019-05-0-5-12.

8. Dmitriev A. P. Razrushenie gornykh porod: Nauchnye shkoly Moskovskogo gornogo [Destruction of rocks: Scientific schools of the Moscow Mining University], Moscow, Izd-vo «Gornaya kniga», 2012, 80 p.

9. Rui Zhang, Zhengfu Ning, Feng Yang, Huawei Zhao, Qing Wang A laboratory study of the porosity-permeability relationships of shale and sandstone under effective stress. International Journal of Rock Mechanics & Mining Sciences. 2016, vol. 81, pp. 19—27.

10. Klawitter M., Esterle J., Collins S. A study of hardness and fracture propagation in coal. International Journal of Rock Mechanics & Mining Sciences. 2015, vol. 76, pp. 237—242.

11. Naeimipour A., Rostami J., Buyuksagis I. S., Frough O. Estimation of rock strength using scratch test by a miniature disc cutter on rock cores or inside boreholes. International Journal of Rock Mechanics and Mining Sciences. 2018, vol. 107, pp. 9—18.

12. Ryazantsev S. N. Issledovanie i vybor parametrov shnekovykh ispolnitel'nykh organov ochistnykh kombaynov dlya konkretnykh usloviy ekspluatatsii [Research and selection of parameters of auger executive bodies of shearers for specific operating conditions. Аbstract of the dissertation for the degree of candidate of technical sciences], Candidate’s thesis, Moscow, 2004, 26 p.

13. Semenova S. A., Patrakov Yu. F., Kleyn M. S. The composition of the lithotypes of clarenoduren coal of Kuzbass and the features of its flotation enrichment. Khimiia tverdogo topliva. 2018, no. 5, pp. 13—19. [In Russ].

14. Bedreev A. S. Research of coal of different brands extracted by various methods in the Kemerovo region. Innovatsii v tekhnologiyakh i obrazovanii. Sbornik statey uchastnikov XIII Mezhdunarodnoy nauchno-prakticheskoy konferentsii [Innovations in technology and education. Collection of articles by participants of XIII International Scientific and Practical Conference], Belovo, 2020, pp. 48—50. [In Russ].

15. OST 12.44.258-84. Kombayny ochistnye. Vybor parametrov i rascheta sil rezaniya i podachi na ispolnitel'nykh organakh. Metodika [Industry standards OST 12.44.258-84. Cleaning combines. Selection of parameters and calculation of cutting and feeding forces on executive bodies. Methodology], Moscow, 1985, 108 p. [In Russ].

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