Force and energy parameters of coal cutting by a single pick with lever–pulse drive

The process of interrupted coal cutting, intrinsic to coal cutting machines with lever– pulse drive (LPD), is analyzed. To this effect, a special test bench was designed as a dynamic model of a lever–pulse drive, which enabled interrupted cutting of coal at the load pulses and chip parameters typical of cutting machines with LPD. The parameters of interrupted cutting pulses are assumed to be the cutting process duration and the average advance speed of a cutting pick per one pulse. The characteristics of the force and energy indicators of cutting process are assumed to be the average cutting force on the way of the cutting pick and the energy input in cutting. The dispersion analysis proved the hypothesis of the absence of significant cutting forces and specific energy inputs in the ranges of the pulse parameters, which allowed conclusion that the pulse parameters had no influence on the force and energy characteristics of the interrupted cutting process. The patterns of influence exerted by the chip formation characteristics and strength properties of coal on the force and energy indicators of cutting were determined from the comparative tests of the interrupted and continuous cutting processes. It is found that calculation of the force and energy indicators of the interrupted cutting process can use the same procedures as in case of continuous cutting.

Keywords: cutting, coal block, interrupted and continuous cutting, lever–pulse drive, cutting pulse, cutting force, cutting energy content, chip formation, cutting resistance, depth of cut, cutting speed.
For citation:

Linnik Yu. N., Linnik V. Yu. Force and energy parameters of coal cutting by a single pick with lever–pulse drive. MIAB. Mining Inf. Anal. Bull. 2024;(11):152-164. [In Russ]. DOI: 10.25018/0236_1493_2024_11_0_152.

Acknowledgements:
Issue number: 11
Year: 2024
Page number: 152-164
ISBN: 0236-1493
UDK: 622-1/-9
DOI: 10.25018/0236_1493_2024_11_0_152
Article receipt date: 28.11.2023
Date of review receipt: 30.01.2024
Date of the editorial board′s decision on the article′s publishing: 10.10.2024
About authors:

Yu.N. Linnik1, Dr. Sci. (Eng.), Professor, Professor,
V.Yu. Linnik1, Dr. Sci. (Econ.), Assistant Professor, Professor, e-mail: vy_linnik@guu.ru,
1 State University of Management, 109542, Moscow, Russia.

 

For contacts:

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

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