Authors: M.V. Shinkevich, M.S. Plaksin

Title of the article: Relationship of geomechanics and methane content of mine workings when performing underground mining operations

Year: 2017, Issue: 5, Pages: 15-23

Branch of knowledge: Earth sciences

Index UDK: 622.121.54

DOI: 10.26730/1999-4125-2017-5-15-23

Abstract: The article presents the results of the study of the methane content dynamics in coal and development faces. The relations of the methane content in mine workings and geomechanical processes are shown. In the 90s of the last century, the fundamentally important features of nonlinear geomechanical processes in the zones affected by mining operations and the resulting changes in the metastable states of two-component geoma-terials were identified. Any technological impact on the coal seam being mined intensifies the process of its gas depletion as a result of the change in the stress state in the peripheral part of the seam, i.e. geomechanical processes affect the gas-kinetic conditions of the seam being mined which ultimately affects the methane content of the workings. Therefore, monitoring and a full analysis of methane content of the workings in the area of mining operations will make it possible to assess the activity of gas geomechanical processes occurring in the near-boundary part of the seam and to identify in advance various dangerous situations, such as rock bumps, coal and gas outbursts, excess gas concentrations resulting from methane blows, etc. It is noted that when creating algorithms for the automated assessment of the condition of the peripheral part of the seam, it is necessary to pay attention to the quality of the information received from the air and gas control systems. The foregoing allows us to quantitatively interpret the development of gas geomechanical processes when performing the underground mining operations. Good quality control and current forecast of gas geomechanical processes, including gas content of extraction panels and development roadways will make it possible to control promptly the air-gas situation in the mine workings, predict gas-dynamic phenomena and increase safety of mining operations.

Key words: Geomechanics nonlinearity dynamics of methane content extraction panel development heading control of air and gas forecast control

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