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.

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.

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.

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

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