2019-5-6

УДК 622.01.016 
DOI: 10.21440/0536-1028-2019-5-44-53

Dyrdin V. V., Kim T. L., Fofanov A. A., Plotnikov E. A., Voronkina N. M. Gas emission under coal mechanical degradation. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal = News of the Higher Institutions. Mining Journal. 2019; 5: 44–53 (In Russ.). DOI: 10.21440/0536-1028-2019-5-44-53

Introduction. Hard coal underground mining safety is inextricably bound up with the measures aimed at the reduction of gas development from the margins of coal seams. At the present time there is no accurate answer to the question why under gas and coal outbursts, specific emission overruns natural gas content by several times. In this regard the scientific task of studying gas emission under coal mechanical degradation is relevant.
Research aim. The present article aims to test the hypotheses of the presence of methane in hard coal, being in other, not sorption bonds, with the matrix, but being able to transfer into gaseous state under mechanical degradation, i.e. coal destruction.
Methodology. The authors collected coal samples from the seams of coal mines of Kuzbass. The character of change in the average weighed size of coal particles has been determined depending on the number of destruction cycles.
The results of the chromatographic analysis of gas liberated under the coal samples destruction are introduced. Results. It has been stated that under the destruction coal samples, collected at the margin of mine influence, “coal” gas is intensively liberated, methane having the higher concentration. It has been stated that under coal mechanical degradation there is a breaking of bonds between the atoms of carbon with “fringes”, and between the graphite-like layers of carbon grating, which leads to the liberation of a significant amount of gas and its transition into the unbound state.
Summary. The method of experimental determination of specific gas emission has been worked out, making it possible to assess the tendency of a coal seam to coal and gas outbursts.

Key words: coal destruction; gas emission; mechanical degradation; coal seam; outbursts.

 

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Received 5 April 2019

 

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