Authors: S.V. Cherdantsev, Yu.M. Filatov, G.A. Lipina

Title of the article: The study of gas flows in mine workings in the vicinity of the centers of selfheating

Year: 2019, Issue: 5, Pages: 47-53

Branch of knowledge: 25.00.20 Geomechanics, rock destruction by explosion, mine aerogasdynamics and mining thermal physics

Index UDK: 622.272: 516.02

DOI: 10.26730/1999-4125-2019-5-47-53

Abstract: With the increase in the intensity of underground mining, due to the use of high-performance mining equipment, and the use of new technological systems of mining , cases of manifestations of negative factors are becoming more frequent. The main ones are gas-dynamic and thermophysical processes in the atmosphere of mine workings, especially those near the centers of self-heating. The article considers the stationary process of gas-air mixtures flow in the treatment mine workings in the presence of heat supply zone caused by self-heating centers located near the workings. On the basis of the laws of conservation of mass, momentum and energy, formulas are obtained and graphs characterizing changes in the parameters of the gas-air flow crossing the heat supply zone are constructed. Some regularities of steady-state flow of gas-air flows in mine workings are found and the conditions for the onset of the unsteady flow regime of mixtures are revealed.

Key words: mining gas mixture the lesions are self-heating the zone of heat supply the laws of conservation of mass momentum and energy enthalpy Mach number and Damkaer shock waves and rarefaction waves

Receiving date: 12.11.2019

Publication date: 31.12.2019

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