Research on Characteristics of Air Flow Disorder in Inlet Shafts
B. Nie1,2, B. Peng1, J. Guo3, X. Liu1, Xu. Liu1, J. Shen1
1Coal Resources and Safe Mining, Beijing, 100083 China
2Xinjiang Institute of Engineering, Urumqi, 830023 China
3China Shipbuilding Industry Corporation, Beijing, 100083 China
Keywords: Шахтный ствол, воздухопадающий, нарушение воздушного потока, локальная естественная тяга, моделирование, исследование in-situ, Inlet shafts, airflow disorder, local natural ventilation pressure, similar simulation experiment, in-situ study
Abstract
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.
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