KEY FACTORS TO GOVERN OUTBURST HAZARD IN KUZBASS COAL

The article discusses how a family of governing factors actualizes conditions for coal and gas outbursts in mines. Such factors include, in particular, volatile yield, moisture content, porosity and depth of coal mining in Kuzbass. In terms of physicochemistry, the critical role of adsorption and absorption processes in coal substance of different rank is discussed. Existence of bifurcation in methane content, moisture content and porosity is found for Kuzbass coal and wider range coal grades: from super anthracite to lignite from the Donets and Lvov–Volyn basins. The experimentally and theoretically examined behavior of empirical relations agrees with actual outburst hazard of basic stratigraphic structures in Kuzbass. The highest gas-dynamic activity is observed in coal seams at the changeover of gradients at the bifurcation point of the outburst-hazardous mining depth. It is shown that at the bifurcation point of methane content, coal seam has genetic ability to generate a disturbing gas-dynamic impulse sufficient for coal self-destruction to be initiated. These qualities explain suddenness of coal and gas outbursts.

For citation: Kiryaeva T.A. Key factors to govern outburst hazard in Kuzbass coal. MIAB. Mining Inf. Anal. Bull. 2019;(7):185-195. [In Russ]. DOI: 10.25018/0236-1493-2019-07-0-185-195.

Acknowledgements: The work was supported by Russian Science Foundation, Project No. 17-17-01282.

Keywords

Bifurcation, outburst hazard, coal, sorption, methane content, moisture content, porosity, volatile yield, Langmuir equation.

Issue number: 7
Year: 2019
ISBN: 0236-1493
UDK: 550.3 + 551 + 622
DOI: 10.25018/0236-1493-2019-07-0-185-195
Authors: Kiryaeva T. A.

About authors: T.A. Kiryaeva, Cand. Sci. (Eng.), Senior Researcher, Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, 630091, Novosibirsk, Russia, e-mail: coalmetan@mail.ru.

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