Authors: J.A. Kharlampenkovа, PatrakovYu.F.

Title of the article: Modeling of dust processes and their influence on the dispersed composition of coal dust

Year: 2018, Issue: 4, Pages: 45-49

Branch of knowledge: Earth sciences

Index UDK: 622.814

DOI: 10.26730/1999-4125-2018-4-45-49

Abstract: In the article additional sources of dust formation are considered when using powered support in the face. These include coal splitting (impact), crushing (compressing lumps) and rubbing of coal pieces against each other and against the metal surface of the support. A feature (dispersity) describing the amount of suspended and deposited dust is presented. A study of the dispersion (particle size distribution) of coal dust was carried out in an experimental setup consisting of a laser diffraction microanalyzer for automatic granulometric express analysis ANALYSETTE 22 COMFORT of FRITSCH GmbH, Laborgerätebau (Germany) and auxiliary equipment. It is established that the finest dust will be formed in the process of interaction of rubbing surfaces of pieces of the destroyed rock. In terms of explosivity, the most dangerous dust is formed in the process of impact. This fact will need to be taken into account in the selection of coal dust samples under real conditions of technological tests and development of recommendations on dust suppression.

Key words: destruction of rock strata dust formation coal dust explosivity dispersed dust composition

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