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.

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