Influence of process flow diagram and longwall length on specific energy consumption of shearers

Authors: Babokin G I

The article analyzes influence exerted by process flow diagram and length of longwalls on specific energy consumption of shearers in flat-pitching coal seams with a view to energy efficiency evaluation of fully mechanized longwall coal production. Electric energy consumption makes 70–80% of total power resources used by a coal mine. Electric energy consumed by coal cutting and haulage in fully mechanized longwalls with shearers reaches 12.1–15.7%, which makes actual the energy saving analysis and the studies of influence exerted by shearer flow diagram and longwall parameters on specific energy consumption of shearer. The analytical estimation procedure is developed for specific energy consumption of a shearer in one-way and shuttle operations. This procedure takes into account power used individually by motors of drums and feed of the shearer during coal shearing and floor scraping. The analysis was performed in terms of shearer model 4LS20 within longwall system YOU in operation in seam 19 in Kostromovskaya mine of MMK-ugol at the mineable seam thickness of 2 m. Relationships between specific energy consumption of the shearer and the cuttability of coal are determined in one-way and shuttle operation of the shearer. The shearer operation in longwall 300 m long allows reducing the specific energy consumption by 8–13% as compared with one-way mining flow diagram. The relationships between the specific energy consumption of the shearer and the longwall length show that with increasing length of longwall from 140 m to 500 m, the specific energy consumption decreases by 4% to 20% in the one-way mining flow chart and by 10% to 34% in the shuttle operation of the shearer at the coal cuttability variation from 300 kN/m to 100 kN/m. It is found that the use of the shuttle process flow chart of the shearer lowers the specific energy consumption of the shearer by 5–13% as compared with the one-way mining diagram and makes it possible to enhance energy efficiency of the fully mechanized longwall.

Keywords: shearer, fully mechanized longwall mining, specific energy consumption, one-way and shuttle process flow diagrams, productivity, longwall length, coal cuttability, consumed energy, capacity.
For citation:

Babokin G. I. Influence of process flow diagram and longwall length on specific energy consumption of shearers. MIAB. Mining Inf. Anal. Bull. 2021;(2):139-149. [In Russ]. DOI: 10.25018/0236-1493-2021-2-0-139-149.

Issue number: 2
Year: 2021
Page number: 139-149
ISBN: 0236-1493
UDK: 621.313: 631.371
DOI: 10.25018/0236-1493-2021-2-0-139-149
Article receipt date: 06.05.2020
Date of review receipt: 11.06.2020
Date of the editorial board′s decision on the article′s publishing: 10.01.2021
About authors:

G.I. Babokin, Dr. Sci. (Eng.), Professor, e-mail:, National University of Science and Technology «MISiS», 119049, Moscow, Russia.

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