Tula State University (Russia):

Kachurin N. M., Doctor of Engineering Sciences, Professor, Head of Chair, ecology@tsu.tula.ru

Sarycheva I. V., Postgraduate, ecology@tsu.tula.ru

Belgorod State University (Russia):

Vorobyev S. A., Ph. D. in Engineering Sciences, Researcher, office@rudmet.ru

Moscow State Mining University (Russia):

Kachurin A. N., Ph. D. in Engineering Sciences, Engineer

The basics of the methods for predication of methane-emission rate from broken-down coal in development and production sections of coal mines are substantiated. Relations of gas drainage rate from broken-down coal to major physical-chemical properties and operational parameters are obtained. The results of computational experiments and calculation formulas for engineering practice of methane-emission rate predication in design of development and production faces ventilation systems are presented. It is shown, that methane-emission from brokendown coal both in development and production sections, from the point of view of the non-equilibrium thermodynamics fundamental basics, is a relaxational process, caused by external actions upon coal layer, leading to drastic increase of gas-discharging surface area. The thermodynamic system «coal—gas» accomplishes a transition to a new and more stable state. The rate of energy and mass exchange in broken-down coal is definitely related to previous stages of «coal—gas» system evolution from the original state, characterized by the natural gas-content of coal, to intermediate state, characterized by gas-bearing capacity of coal layer face area. Subsequently, gas-emission rate depends on residual gas-content of virgin coal, physical-chemical properties of coal and operational parameters of tunneling or coal-face works.

1. Romanchenko S. B. Control of aero-dust-dynamic processes in the time of underground coal mining. Gornyi Zhurnal = Mining Journal, 2014, No. 5, pp. 29–32.
2. Kachurin N. M., Klishin V. I., Borshchevich A. M., Kachurin A. N. Prognoz metanovoy opasnosti ugolnykh shakht pri intensivnoy otrabotke ugolnykh plastov (Forecasting methane hazard of coal mines under intensive development of coal seams). Tula–Kemerovo, Tula State University, 2013, 220 p.
3. Borshchevich A. M., Kovalev R. A., Bukhtiyarov A. A., Sarycheva I. V. Limiting mining face productivity by gas factor. Izvestiya Tulskogo Gosudarstvennogo Universiteta. Yestestvennyye Nauki = Proceedings of Tula State University. Natural Sciences, 2010, Iss. 1, pp. 232–239.
4. Kachurin N. M., Bukhtiyarov A. A., Sarycheva I. V. Optimizing a velocity of transporting coal in mining face by gas factor. Izvestiya Tulskogo Gosudarstvennogo Universiteta. Nauki o Zemle = Proceedings of Tula State University. Earth Science, 2010, Iss. 2, pp. 97–103.