Authors: G.N. Karpov, A.A. Sidorenko, A.A. Nosov

Title of the article: Increasing the support efficiency of recovery rooms that are created by longwall set of equipment

Year: 2021, Issue: 1, Pages: 73-79

Branch of knowledge: 25.00.22 Geotechnology (underground, open and construction)s

Index UDK: 622

DOI: 10.26730/1999-4125-2021-1-73-79

Abstract: The purpose of this work is to increase the efficiency of recovery rooms support settings, that are created by longwall set of equipment in the process of mining flat coal seams by longwall faces. The relevance of the topic is due to the low efficiency and high labor intensity of setting recovery rooms support and due to a significant difference between the charts of supports in the mines of Russia and in the leading coal mining operations abroad. The analysis of the current regulatory documents and charts of supports of recovery rooms revealed significant shortcomings in the methods used for calculating the roof bolting support of recovery rooms. One of the main shortcomings is the necessity to improve the methods for calculating the extent of the seam limit state zone in the wall of the recovery room, which determines almost all the parameters of the bolting support, installed in the roof and the wall of the recovery room, but the current regulatory document does not take into account the extracting seam thickness and the accumulation of stresses in the abutment pressure zone. The methodological approach proposed by the authors considers the influence of the extracting seam thickness and the properties of the main roof strata and improves the accuracy of the recovery rooms bolting support calculation. The scientific novelty of the work consists in the creation of a methodological approach that takes into account the influence of the main mining-engineering and mining-geological factors. The paper presents a software system developed by the authors that provides computer analysis and visualization of the parameters for the bolting support of the recovery rooms formed by a longwall set of equipment in the process of mining the flat coal seams.

Key words: underground coal mining longwall faces recovery rooms roof bolting support limit state zone

Receiving date: 10.01.2021

Publication date: 29.04.2021

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