Research on Characteristics of Air Flow Disorder in Inlet Shafts

Airflow disorder in inlet shafts and related crossheadings, caused by local natural ventilation pressure, is a complicated thermodynamic phenomenon. The conception of local natural ventilation pressure is proposed based on a simplified ventilation system. Airflow disorder principle is analyzed theor...

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Bibliographic Details
Published in:Journal of mining science 2018-05, Vol.54 (3), p.444-457
Main Authors: Nie, B. S., Peng, B., Guo, J. H., Liu, X. F., Liu, X. T., Shen, J. S.
Format: Article
Language:English
Subjects:
Air flow
Air temperature
Analysis
Earth and Environmental Science
Earth Sciences
Excavation
Facilities planning
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Medical research
Mine Aerogasdynamics
Mine ventilation
Mineral Resources
Mining industry
Pressure
Stability
Temperature differences
Temperature gradients
Thermodynamics
Underground mines
Ventilation
Workers
Working conditions
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Summary:Airflow disorder in inlet shafts and related crossheadings, caused by local natural ventilation pressure, is a complicated thermodynamic phenomenon. The conception of local natural ventilation pressure is proposed based on a simplified ventilation system. Airflow disorder principle is analyzed theoretically and verified by similar simulation experiment and in-situ study. Research results show that local natural ventilation pressure will form when average temperature difference or density difference of air-column exists among inlet shafts in an underground mine with exhaust ventilation. When changing in a large range, local natural ventilation pressure will cause airflow disorder in inlet shafts or related crossheadings. The research results have guiding significance for promoting the stability of ventilation system and improving the working environment of underground mines.
ISSN:1062-7391
1573-8736
DOI:10.1134/S1062739118033846