Evaluation of the influence of aerodynamic aging of production on aerological risks on coal mines

The results of a study of the aerodynamic aging of mine workings are presented. It is established that the local workings located in the zone of active manifestation of rock pressure are most deformed. The average rate of increase in their resistance reaches 0.0112 N×s2 / m9×yr, and the degree of increase in their resistivities over 4–9 years of existence reaches 7–8 times. The rate of aging of the mine workings is much lower than that of the local workings, averaging 0.0014 N×s2/m9×year for the inclined workings on average over the entire period of their existence, and 0.0009 N×s2/m9×year for horizontal ones. The degree of increase in the resistivity of capital workings for 12—25 years of their existence reaches 3 times. The workings were ranked by relative aerological risk indicator Rac by aerodynamic aging factor. The calculations showed that the average value of the relative aerological risk indicator for the aerodynamic aging factor of the Rac mine workings for the local haul drifts was 0.541; for precinct ventilation drifts — 0.842; for capital inclined workings — 0.172; for capital horizontal workings — 0.101. When assessing the risk of gassing of workings, it is necessary to take into account data on the aerodynamic aging of mine workings.

Keywords: aerological risk, aerodynamic aging, reliability of mine ventilation systems, aerodynamic resistance of mine workings, method of protecting mine workings, workings ranking, relative aerological risk indicator, risk assessment.
For citation:

Skopintseva O.V., Balovtsev S.V. Evaluation of the influence of aerodynamic aging of production on aerological risks on coal mines. MIAB. Mining Inf. Anal. Bull. 2020;(6-1):74-83. [In Russ]. DOI: 10.25018/0236-1493-2020-61-0-74-83.

Acknowledgements:
Issue number: 6
Year: 2020
Page number: 74-83
ISBN: 0236-1493
UDK: 622.831
DOI: 10.25018/0236-1493-2020-61-0-74-83
Article receipt date: 11.03.2020
Date of review receipt: 13.04.2020
Date of the editorial board′s decision on the article′s publishing: 20.05.2020
About authors:

Skopintseva O.V., Dr. Sci. (Eng.), Professor of the Technosphere Security Department, Professor, е-mail: skopintseva54@mail.ru;
Balovtsev S.V., Cand. Sci. (Eng.), Assistant Professor, е-mail: Balovcev@yandex.ru;
1 National university of science and technology «MISIS», Moscow, Russia;
2 Russian state geological exploration University named after Sergo Ordzhonikidze (MGRI), Moscow, Russia.

 

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