Melnikov Research Institute of Problems of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, Moscow, Russian:
V. N. Zakharov, Director, Corresponding Member of the RAS
O. N. Malinnikova, Head of Laboratory, Doctor of Engineering Sciences, olga_malinnikova@mail.ru

The identified basic features of gas-dynamic and geodynamic events such as coal and gas outbursts and rock bursts show that these events are initiated in the influence zone of roadways, belong to the class of natural-and-induced phenomena and take place on the tectonically dislocated coal and rock mass. The integrated studies of variation in the face zone parameters in coal mines in the Donets Coal Basin revealed the change in the energy content and outbursting potential in the coal face zone from the exposed surface depthward the rock mass. The examples demonstrate the defining role of stress variation on the processes in the face zone: geodynamics (degassed zone depth from exposed surface, drainage rate), temperature and outbursting risk of coal seam. The article presents the expressions for the strength of gas-bearing coal seams with different rates of tectonic dislocation. The expressions were obtained in physical simulation of face area of a coal seam (Three-axial compression with different stresses and active pressure of gas) depending on the minor principal stress using coal samples. The authors show that the estimated outbursting risk of coal seams in Kuzbass grows with depth of mining much faster than in Donbass and can constitute a problem as mining transfer on deeper levels. It is required to investigate processes in face areas of coal seams in Kuzbass in order to find regular patterns and features of of outburst hazard of coal in the Kuznetsk Basin.
This study was supported by the Russian Science Foundation, Grant No. 16–17–00029.

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