Setting the volume and location of the gas collectors of abandoned coal mines

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Authors:

R. К. Каmarov, Cand. Sc. (Tech.), Prof., Karaganda State Technical University, Karaganda, Republic  of Kazakhstan, email: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

N. М. Zamaliyev, Karaganda State Technical University, Karaganda, Republic of Kazakhstan, email:i This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

D. R. Akhmatnurov, Karaganda State Technical University, Karaganda, Republic of Kazakhstan, email: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

R. А. Мusin, Karaganda State Technical University, Karaganda, Republic of Kazakhstan, email: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose. Developing a research method for setting the most probable gas collector cavities and their volumes from the position of rock movement and gas dynamics of coal seams.

Methodology. The model of forming voids and cracks filled with gas in the abandoned mines is based on the analysis of mining-and-geological and mining-technical conditions, as well as the existing ideas of the mechanism of rock movement in the mined-out space of coal mines.

Findings. As a result of the analysis of the mechanism of shifting the underworked and overworked coal seams, there have been established the most probable locations of the gas collectors from the position of its possible extraction in the abandoned mines. There has been proposed a model for calculating the volume of gas cavities after the mine liquidation. There has been determined a fraction of voidness with respect to the extracted coal that makes about 8 %.

Originality.Ensuring the methane extraction from the abandoned mines by drilling vertical wells from the surface is associated with solving the task of determining their location based on the calculation of the intersection of the most likely gas collectors. The model of forming voids and cracks filled with gas in the abandoned mines has been constructed on the basis of analyzing the regularities characterizing the process of rock movement in the course of stoping in conjunction with the changing parameters of the gas dynamics of coal seams.

Practical value.The obtained results are the basis for developing a feasibility study for utilizing methane from the abandoned mines which will involve large resources of the new energy carrier in the fuel-and-energy balance of the region and improve the environmental situation by reducing methane emissions into the atmosphere.

References.

1.Grinev, V.G., Kuznetsova, L.D., Voloshin, N.I., Sergienko, A.I. and Podrukhin, A.A., 2012. Studying coal mine methane resources of closed coal mines in the Donetsk region Physico-technical problems of mining, 15, p. 135.

2. Drizhd, N.A., Zamaliev, N.M., Ahmatnurov, D.R., Shmidt-Fedotova, I.M. and Mussin, R.A., 2016. State and prospects of methane extraction in the fields of the abandoned coal mines of the Karaganda basin. Monograph. KSTU.

3.Shashenko, A.N., Kukharev, E.V., Gapeyev, S.N. and Yeremenko, A.Yu., 2014. Step-by-step procedure for estimating the parameters of the coal-rock massif as a gas collector. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 6, pp. 38-45.

4.Shashenko, A.N., Kukharev, E.V., Logunova, A.O. and Eremenko, A.Yu., 2014. Estimating spatial and collector parameters of the anthropogenic gas field by geomechanical characteristics of enclosing coal-bearing massif. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 1, pp. 33‒40.

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ISSN (print) 2071-2227,
ISSN (online) 2223-2362.
Journal was registered by Ministry of Justice of Ukraine.
Registration number КВ No.17742-6592PR dated April 27, 2011.

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