Analysis of the gas balance of the exhaust area in ensuring aerological security

Substantiates the role of the gas balance analysis in the gas emission control system of a gas-rich mine, the goals and objectives of this analysis, as well as proposals for the methodology for determining the main components of the gas balance of an extraction area based on remote air gas monitoring data. It is indicated that the requirements of the safety rules for the placement of methane and air velocity control sensors, which the designers are guided by, are insufficient to determine the gas balance of the mining area. To automatically control the dynamics of the gas balance in the air-gas control system of the site, it is necessary to increase the number of metering stations and develop algorithms that take into account the averaging of the measured speed of movement and the calculation of the intensity of each source of methane release within the site. At the same time, in the case of degassing, for the purpose of analyzing the dynamics of the gas balance, it is necessary to simultaneously control the parameters of the gas-air mixture in the ventilation and degassing networks. With combined gas emission control schemes that provide for multi-track preparation to ensure separate dilution of methane according to its sources, isolated methane removal and degassing, the proposed solutions will complicate the maintenance of the air gas control system and automatic gas protection not only due to the number of sensors, but also due to the fact that most of them need to be moved as the production face moves forward. But this complication is compensated by the full picture of the gas-air mixture flows within the extraction area, the ability to monitor in real time the achievement of design indicators of all methods of gas emission control, predict the change in gas content of each source when the load on the working face changes, reasonably select objects and methods of degassing, clarify the parameters of the schemes degassing, that is, to really manage the efficiency of the ventilation and degassing systems of a coal mine.

Kaledina N. O., Chechel K. N. Analysis of the gas balance of the exhaust area in ensuring aerological security. MIAB. Mining Inf. Anal. Bull. 2021;(10-1):5—16. [In Russ]. DOI: 10.25018/0236_1493_2021_101_0_5.

Kaledina N. O., Dr. Sci. (Eng.), Professor, e-mail: nok52@mail.ru, ORCID ID 0000-00017292-7364;
Chechel K. N., student, e-mail kristina.chechel@bk.ru; Mining Institute NUST “MISiS”, Moscow, Russia.

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