Authors: K.A. Filimonov, A.V. Kapanina

Title of the article: Investigation of the technological capabilities of the shearer bi-directional cutting sequence

Year: 2025, Issue: 3, Pages: 148-159

Branch of knowledge: 2.8.8 Geotechnology, mining machines

Index UDK: 622.014.02

DOI: 10.26730/1999-4125-2025-3-148-159

Abstract: The possibility of increasing production in the specific cutting sequence should be considered in terms of increasing the face length, haulage speed, power supply capacity and cutting web. Over the past few decades, there has been an increase in these characteristics, especially in power supply capacity. This has contributed to a significant increase in daily production. The article investigates the potentialities of these characteristics in increasing production and estimates the feasibility of further increasing them within the same cutting sequence. The investigation was made for a 2.5 m seam and its cuttability of 260 kN/m. The elements of a shearer operation cycle in bi-directional cutting sequence were identified. The classification of cycle elements according to several criteria was proposed. The duration of the mining cycle was determined on the duration of cycle elements, with the face length varying from 200 to 400 m and the shearer haulage speed varying from 3 to 30 m/min. The results are presented in the form of diagrams where the elements composing the mining cycle are classified in enlarged groups. The shearer motor power required to ensure the operation haulage speed in specific conditions was determined. The daily operational capacity of a shearer in the considered range of conditions was determined. The results were presented in the form of graphs illustrating the dependence of capacity on the shearer operation haulage speed and the required motor power at different values of the face length. It was found that under the considered conditions the operation haulage speed of up to 30 m/min can only be provided with shearers having maximum power capacity (» 2600 kW) to date. The transition from the 0,8 m cutting web to 1,0 m was estimated. The shearer haulage speed and operational capacity were estimated for a 1.0 m cutting web at different longwall lengths. Conclusions on the potentialities of increasing daily output in the bi-directional cutting sequence by using more powerful shearers, increasing the face length, and increasing the cutting web were presented.

Key words: cutting sequence shearer capacity face length haulage speed motor power cutting web

Receiving date: 15.11.2024

Approval date: 10.06.2025

Publication date: 26.06.2025

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