- Tytuł:
- Numerical Study on Effects of Airflow Parameters on the Air Temperature the at Mechanized Longwall of Mongduong Coal Mine
- Autorzy:
-
Nguyen, Hong Thi
Nguyen, Quang Van - Powiązania:
- https://bibliotekanauki.pl/articles/27323262.pdf
- Data publikacji:
- 2023
- Wydawca:
- Polskie Towarzystwo Przeróbki Kopalin
- Tematy:
-
numerical modelling
Ansys CFX
mechanized longwall
temperature of air mine
velocity of air mine
Mongduong coal mine
modelowanie numeryczne
temperatura
powietrze kopalniane
Wietnam - Opis:
- The increasing depth of extraction and the degree of mechanization leading to the risk of workers working in poor microclimate conditions has become one of the major safety issues in coal mines. During the survey of the current microclimate in Mongduong coal mine, it showed that the temperature of the mechanized longwall exceeded the permissible regulations (t°≤ 30°C), the air humidity is about 95–100%. The reason for the increase of air temperature in longwall is due to geothermal, heat radiated from the longwall equipment and the inlet wind high temperature. To improve the thermal environment in the mechanized longwall area, Vietnam's coal mines open use ventilation, but the efficiency is not high. Therefore, the paper evaluated the influence of airflow on the temperature of the longwall, 7 models with different air flow velocities and 3 models with inlet air temperature have been created in ICM-CFD and simulated by Ansys CFX software. The environment temperature of each model was evaluated by analyzing the average temperature of the roadway section, the cross-section distribution of the roadway temperature and the velocity streamline of the whole roadway. As a result, the air flow rate increases leading to the air temperature in the longwall decreases, however the wind speed is limited. The inlet temperature of the gas stream is an important factor that affects the thermal environment in the longwall. The results of the article are the basis for making solutions to improve the thermal environment suitable for high-temperature longwall.
- Źródło:
-
Inżynieria Mineralna; 2023, 2; 89--96
1640-4920 - Pojawia się w:
- Inżynieria Mineralna
- Dostawca treści:
- Biblioteka Nauki
Artykuł