Air quality control in coal mines based on gas monitoring statistics

The computational method is developed for failure-free operation of coal longwalls with various ventilation schemes (U-type, Z-type and Y-type) based on statistics on failures of mine ventilation elements within a sufficiently long period of time. The calculated gas pollution risks Rgas for longwalls in the same geotechnical conditions are 2.9 times higher in case of U-type ventilation and 1.9 times higher in Y-type ventilation as compared with Z-type ventilation. The Z-type ventilation scheme is 1.4 times more hazardous than the Y-type ventilation. Coal mines with high gas content should use the Y-type ventilation schemes, with detached dissolution of methane, as they feature 3 times less risk of gas pollution of air in longwalls as compared with the U-type ventilation. Gas pollution risk calculation for longwalls in different geological and geotechnical conditions requires a representative volume of statistical data on elements of ventilation systems (main fans, gas suction plants, local ventilation fans, air doors and air locks, crossings, main air feed and ventilation shafts, longwalls, haulage and ventilation drifts, gas suction pipelines, automation equipment, etc.) and geotechnology (longwall capacity, coal seam thickness, rock mass strength, mine support systems, mining depth, mining system, etc.). Data base on failures of ventilation system elements should use the data of gas monitoring of mine air. The research findings serve as a ground of Balovtsev’s integrated procedure for air quality assessment and control in planning, design, operation, closure and abandonment of coal mines.

Keywords: super hazardous coal mines by gas criterion, safe air quality, gas monitoring, gas pollution risk assessment, longwall ventilation system, mine ventilation reliability, failure rate.
For citation:

Skopintseva O. V., Balovtsev S. V. Air quality control in coal mines based on gas monitoring statistics. MIAB. Mining Inf. Anal. Bull. 2021;(3):78-89. [In Russ]. DOI: 10.25018/0236-1493-2021-1-0-78-89.

Acknowledgements:
Issue number: 1
Year: 2021
Page number: 78-89
ISBN: 0236-1493
UDK: 622.831
DOI: 10.25018/0236-1493-2021-1-0-78-89
Article receipt date: 07.08.2020
Date of review receipt: 02.10.2020
Date of the editorial board′s decision on the article′s publishing: 10.12.2020
About authors:

O.V. Skopintseva1, Dr. Sci. (Eng.), Professor, e-mail: skopintseva54@mail.ru,
S.V. Balovtsev1, Cand. Sci. (Eng.), Assistant Professor, e-mail: Balovcev@yandex.ru,
1 National University of Science and Technology «MISiS», 119049, Moscow, Russia.

For contacts:

S.V. Balovtsev, e-mail: Balovcev@yandex.ru.

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