Effect of mining machine cutting head design on coal fracture and loading efficiency

Actually the coal mining industry both in Russia and in the world uses cutter–loaders and plough systems with cutting heads of vitally different designs. Efficiency of coal cutting and loading on an armored face conveyor is governed by both coal cuttability and design variables of cutting heads, which technically confine the process of coal cutting. This article describes the experimental research into the influence exerted by the cutting performance with cutter–loaders and plough systems, as well as by the coal cuttability on the coal cutting efficiency assessed in terms of specific energy consumption of coal cutting. The calculated dependences of the average actual cutting section (cm2), obtained with cutter–loaders and plough systems equipped with different-design cutting heads, as function of operating conditions, arrangement patterns of cutters on cutting heads and coal seam cuttability are presented. It is found that cutting thickness and mining machine advance velocity depend on the coal cuttability, and the related calculated dependences are determined. The equation is proposed for determining the carrying capacity of a screw cutting head and for optimizing the critical ratio of velocities of cutting and machine advance to ensure efficient coal outlet from the cutting zone to AFC.

Keywords: coal seam, cutter–loader, cutting head, cuttability, cutting thickness, advance velocity, cutting process, cutter, cutting pitch, coal flow area, outlet height, carrying capacity.
For citation:

Zakharov V. N., Linnik Yu. N., Linnik V. Yu., Zhabin A. B., Zich A. Effect of mining machine cutting head design on coal fracture and loading efficiency. MIAB. Mining Inf. Anal. Bull. 2021;(3):5-16. [In Russ]. DOI: 10.25018/0236-1493-2021-3-0-5-16.

Acknowledgements:
Issue number: 3
Year: 2021
Page number: 5-16
ISBN: 0236-1493
UDK: 622.23.05
DOI: 10.25018/0236-1493-2021-3-0-5-16
Article receipt date: 03.11.2020
Date of review receipt: 16.12.2020
Date of the editorial board′s decision on the article′s publishing: 10.02.2021
About authors:

V.N. Zakharov, Corresponding Member of Russian Academy of Sciences, Dr. Sci. (Eng.), Professor, Institute of Problems of Comprehensive Exploitation of Mineral Resources of Russian Academy of Sciences, 111020, Moscow, Russia,
Yu.N. Linnik1, Dr. Sci. (Eng.), Professor,
V.Yu. Linnik1, Dr. Sci. (Econ.), Assistant Professor, Professor, e-mail: vy_linnik@guu.ru,
A.B. Zhabin, Dr. Sci. (Eng.), Professor, Full Member of Academy of Mining Sciences, Tula state University, 300012, Tula, Russia,
A. Zich, Dr. Sci. (Eng.), Professor, Freiburg Academy, Consultant in the Field of Energy Efficiency, MS QF GmbH, Oderwitz, Germany,
1 State University of Management, 109542, Moscow, Russia.

 

For contacts:

V.Yu. Linnik, e-mail: vy_linnik@guu.ru.

Bibliography:

1. Pozin E. Z., Melamed V. Z., Ton V. V. Razrushenie ugley vyemochnymi mashinami [Coal crushing by excavating machines], Moscow, Nedra, 1984, 288 p.

2. Pozin E. Z., Melamed V. Z., Azovtseva S. M. Izmel'chenie ugley pri rezanii [Coal crushing while cutting], Moscow, Nauka, 1977, 138 p.

3. Linnik Yu. N., Linnik V.Yu. Razrushenie ugol'nykh plastov ispolnitel'nymi organami kombaynov i strugov [Destruction of coal seams by executive bodies of combines and plows], Moscow, Rusaync, 2020, 430 p.

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

5. Qiangling Yao, Xuehua Li, Boyang Sun, Minghe Ju, Qundi Qu Numerical investigation of the effects of coal seam dip angle on coal wall stability. International Journal of Rock Mechanics and Mining Sciences. 2017. Vol. 100. Pp. 298—309.

6. Adam K. Schwartzkopff, Nouné S. Melkoumian, Chaoshui Xu Fracture mechanics approximation to predict the breakdown pressure using the theory of critical distances. International Journal of Rock Mechanics and Mining Sciences. 2017. Vol. 95. Pp. 48—61.

7. Stoxreiter T., Martin A., Teza D., Galler R. Hard rock cutting with high pressure jets in various ambient pressure regimes. International Journal of Rock Mechanics and Mining Sciences. 2018. Vol. 108. Pp. 179—188.

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

9. Aksenov V. V., Khoreshok A. A., Anan'ev K. A., Ermakov A.N. Review and analysis of methods for determining the parameters of cutting executive bodies. Energeticheskaya bezopasnost' Rossii. Novye podkhody k razvitiyu ugol'noy promyshlennosti. Sbornik trudov XVI Mezhdunarodnoy nauchno-prakticheskoy konferentsii [Energy Security of Russia. New approaches to the development of the coal industry. Proceedings of the XVI International Scientific and Practical Conference], Kemerovo, 2014, pp. 92—94. [In Russ].

10. Komissarov A. P., Prokopovich G. V., Glazyrin S. S. Adaptation of percussion drilling machine designs to operating conditions. Mining Equipment and Electromechanics. 2017, no 2, pp. 19—22. [In Russ].

11. Bolobov V. I., Batalov A. P., Bin Le Tkhan, Yusupov G. A. Regularities of rock destruction by a single blow. Mining Equipment and Electromechanics. 2017, no 6, pp. 43—48. [In Russ].

12. Khoreshok A. A., Tsekhin A. M., Borisov A.Yu. Influence of operating conditions of mining combines on the design of their executive bodies. Mining Equipment and Electromechanics. 2012, no 6, pp. 2–5. [In Russ].

13. Evans I. A theory of the cutting force for point-attack picks. Geotechnical and Geological Engineering. 1984. Vol. 2. No 1. Pp. 63—71.

14. Kuidong G., Changlong D., Hongxiang J., Songyong L. A theoretical model for predicting the Peak Cutting Force of conical picks. Frattura ed Integrità Strutturale (Fracture and Structural Integrity). 2014. Vol. 8. No 27. Pp. 43—52. DOI: 10.3221/IGF-ESIS.27.06.

15. Zakharov V. N., Linnik Yu. N., Linnik V.Yu., 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.

16. Gabov V. V., Nguen Khak Lin, Nguen Van Suan, Le Tkhan Bin, Zadkov D. A. Substantiation of geometric and operating parameters of auger executive bodies, ensuring the efficiency of loading coal onto the face conveyor. Ugol’. 2018, no 2, pp. 32—33. [In Russ].

17. Khoreshok A. A., Mamet'ev L. E., Tsekhin A. M., Borisov A. Yu. Gornye mashiny i oborudovanie podzemnykh gornykh rabot. Rezhushchiy instrument gornykh mashin: uchebnoe posobie [Mining machines and equipment for underground mining. Mining Machine Cutting Tool. Educational aid], Kemerovo, KuzGTU, 2012, 288 p.

18. Kuidong Gao, Changlong Du, Jianghui Dong, Qingliang Zeng Influence of the drum position parameters and the ranging arm thickness on the coal loading performance. Minerals. 2015. Vol. 5. Pp. 723—736. DOI: 10.3390/min5040520.

19. Zvonarev I. E., Shishlyannikov D. I. Efficiency improvement of loading of potassium ore by means of «Ural-20R» heading-and-winning machine. IOP Conference Series: Earth and Environmental Science. 2017. Vol. 87. Article 022025.

20. Ignat'ev A. D., Karlenkov A. A., Lotar' V. N. Osnovy vybora parametrov strugovykh ustanovok dlya ugol'noy promyshlennosti [Plow Sizing Basics for the Coal Industry], Moscow, Nauka, 1980, 267 p.

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