Bulat A.F., Slashchov I.N., Slashchova Ye.A., Evaluation methods of interconnected geomechanical and gas dynamic processes in the rock massif for the systems of working medium control in the mines

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Parent Category: Geo-Technical Mechanics, 2017

Category: Geo-Technical Mechanics, 2017, Issue 134

Geoteh. meh. 2017, 134, 3-21

https://doi.org/10.15407/geotm2017.134.003

 

Bulat A.F., Acad. NASU, D. Sc. (Tech.), Professor,

Slashchov I.N., Ph.D. (Tech.), Senior Researcher,

SlashchovaYe.A., Ph.D. (Tech.), Senior Researcher

(IGTM NAS of Ukraine)

EVALUATION METHODS OF INTERCONNECTED GEOMECHANICAL AND GAS DYNAMIC PROCESSES IN THE ROCK MASSIF FOR THE SYSTEMS OF WORKING MEDIUM CONTROL IN THE MINES

 

UDC 622.831.312:622.817

Language: Russian

Abstract.

The article presents results of investigations on validation of parameter complex for interconnected geomechanical and gas-dynamic processes in the rock massif for mine safety control systems. Model of gas filtering transfer in the rock massif during the coal-seam mining by adjacent longwalls was further developed; the model differs by calculation of components of main deformations of geomechanical model elements, which are indicators of changed structure and formation of areas with gas accumulation and escape, as well as changed orientation of geospace and openness of the main crack systems in the processes of mining operations. It is established that: in zones with random roof falling behind the longwall face, fracture cracks do not impede gases to flow in various directions; in areas with the rock inelastic deformation and non-uniform compression, maximum gas transfer occurs along the main cracks developed towards zones with reduced pressure; in areas with reference pressure, pores are compressed, and rock permeability to gas is extremely low, not more than 1...2 mD. Rational parameter complex of interconnected geomechanical and gas-dynamic processes in the rock massif were validated for the control systems in the mine working medium, including such characteristics as volumes, location and gas permeability of the pore-cracked space, which are the key factors for determining intensity of gases migration and ways of their filtration. It is for the first time when regularities of changes of the pore-cracked space shape and volume at different stages of the adjacent longwall mining were established basing on parameters of orientation of the fracture systems, caused by technogeneous disturbance, and spherical part of the strain tensor. The obtained scientific results presents a basis for developing experimental-and-analytical methods for controlling working medium in mines and creating safety information systems for industrial enterprises.

Keywords: geomechanical and gas-dynamic processes, permeability, filtering, modeling of the rock massif, mine safety control systems.

REFERENCES

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About the authors

Bulat Anatoly Fedorovich, Academician of the National Academy of Science of Ukraine, Doctor of Technical Sciences (D. Sc), Professor, Director of the Institute, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Slashchov Igor Nikolaevich, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in the Department of Mineral Mining at Great Depths, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Slashchovа Yelena Anatolyevna, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in the Department of Mineral Mining at Great Depths, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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