Authors: O.E. Shabaev, V.G. Nechepaev, E.Yu. Stepanenko, P.P. Zinchenko

Title of the article: Influence of the web width of the shearer for thin coal seams on the granulometric composition of the separated rom coal

Year: 2022, Issue: 6, Pages: 40-47

Branch of knowledge: 2.8.8. Geotechnology, Mining machines (engineering)

Index UDK: 622.232.72

DOI: 10.26730/1816-4528-2022-6-40-47

Abstract: The operation of coal combines on seams with a thickness of 0.55 ... 1.20 m is characterized by low efficiency due to insufficient loading capacity of small diameter augers. The choice of a rational combination of design and operating parameters of a coal miner with small-diameter augers, as well as the structure of its loading subsystem, in relation to the specified operating conditions, taking into account emerging restrictions, makes it possible to increase technical productivity by 1.1 ... 2.1 times and reduce the energy intensity of the main work processes 1.3 ... 2.3 times. However, the influence of the values of these parameters of the combine on the particle size distribution of the separated coal is not clear. The main grinding of coal occurs at the stage of its separation and loading onto the conveyor. In order to avoid additional grinding of the separated coal, due to the loading process, it is advisable to carry out the extraction of coal when the combine is operating at the limiting speed of movement, which excludes the occurrence of circulation. The paper considers the influence of the width of a small-diameter auger on the qualitative (grade) composition of the separated rock mass. It has been established that the optimization of the structure of the subsystem for loading coal combines and their geometric and operational parameters in relation to the given mining and geological operating conditions can significantly improve the granulometric composition of the separated coal.

Key words: auger length particle size distribution small diameter auger coal loading process thin shallow coal seams

Receiving date: 15.09.2022

Approval date: 01.10.2022

Publication date: 27.12.2022

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