Agaev R.A., Andreev S.Yu., Makeev S.YU., Ryzhov G.A., Sofiyskiy K.K. Methane blocking in the coal seam by solutions of polymers

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Parent Category: Geo-Technical Mechanics, 2017

Category: Geo-Technical Mechanics, 2017, Issue 135

Geoteh. meh. 2017, 135, 137-148

METHANE BLOCKING IN THE COAL SEAM BY SOLUTIONS OF POLYMERS
 Agaev R.A., Andreev S.Yu., Makeev S.YU., Ryzhov G.A., Sofiyskiy K.K.
IGTM NAS of Ukraine

UDC 622.831.325

Abstract. Objective of the work is to substantiate mechanism of polymer penetration into the coal mass and its interaction with the coal, and to improve method of driving preparatory roadways in the prone-to-outburst coal seams through the using physicochemical treatment (PСT) by polymer in order to improve safety and efficiency of mining operations. Previously, it was shown that physicochemical action allowed to control stress-strain state of coal-rock mass; however, problem of methane escaping into the worked-out area of the goaf and preparatory roadways was still unsolved, hence, making the further researches a strong business case. In order to solve this problem, the authors propose to use polymer solutions during the PСT, which, being under the great pressure, penetrate into the cracks and pores created beforehand by the hydrodynamic effect and form a gel-like composition, which blocks methane. It is established that maximum blocking of methane in the pores can be achieved under condition of hemosorption of the adsorbed layer on the surface of the coal. This action leads to formation of a solid polymer layer, which is able to block methane in the pores. Scientific novelty of the results lies in explanation of physical essence and mechanism of processing methane-bearing coal seam by polymeric compositions, at which coal surface is wetted by the high-molecular compounds according to the mechanism of macromolecule distribution on the interphase boundary with formation of solid, densely packed adsorption layer. The results can be used while developing methods for driving preparatory roadways in the prone-to-outburst coal seams with the help of PСT by polymer in order to prevent gas-dynamic phenomena and to keep methane at a safe distance from the face and the design contour of roadway.
Keywords: gas-dynamic phenomenon, physical and chemical treatment, polymer composition, non-Newtonian fluid.

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About the authors:

Agaev Ruslan Aguguluevich, Candidate of Technical Sciences (Ph.D), Senior Researcher in
Department of Underground Coal Mining Technology, M.S. Polyakov Institute of Geotechnical
Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine,
This email address is being protected from spambots. You need JavaScript enabled to view it.

Andreev Sergey Jurievich, Candidate of Technical Sciences (Ph.D), Senior Researcher,
Principal Engineer in Department of Mineral Mining at Great Depths, M.S. Polyakov Institute of
Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU),
Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Makeev Sergey Jurievich, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior
Researcher in Department of Mineral Mining at Great Depths, M.S. Polyakov Institute of
Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU),
Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Ryzhov Gennadiy Alexandrovich, Master of Science (M.S), Junior Researcher in Department
of Mineral Mining at Great Depths, M.S. Polyakov Institute of Geotechnical Mechanics under the
National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Sofiyskiy Konstantin Konstantinovich, Doctor of Technical Sciences (D.Sc.), Professor, Head
of Department of Underground Coal Mining Technology, M.S. Polyakov Institute of Geotechnical
Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine,
This email address is being protected from spambots. You need JavaScript enabled to view it.

 

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