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

Identyfikatory

DOI

10.29227/IM-2023-02-16

Warianty tytułu

PL

Badania numeryczne wpływu parametrów przepływu powietrza na temperaturę powietrza w ścianie zmechanizowanej kopalni Mongduong

• Konferencja: POL-VIET 2023 — the 7th International Conference POL-VIET
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

numerical modelling; Ansys CFX; mechanized longwall; temperature of air mine; velocity of air mine; Mongduong coal mine

PL

modelowanie numeryczne; temperatura; powietrze kopalniane; Wietnam

• Wydawca: Polskie Towarzystwo Przeróbki Kopalin
• Czasopismo: Inżynieria Mineralna
• Rocznik: 2023
• Tom: no. 2, vol. 1
• Strony: 89--96
• Opis fizyczny: Bibliogr. 15 poz., rys., tab., wykr., zdj.

Twórcy

autor

Nguyen Hong Thi

• Faculty of Environment, Hanoi University of Mining and Geology, 18 Vien street, Hanoi, Vietnam

autor

Nguyen Quang Van

• Faculty of Mining, Hanoi University of Mining and Geology, 18 Vien street, Hanoi, Vietnam

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu „Społeczna odpowiedzialność nauki” - moduł: Popularyzacja nauki i promocja sportu (2022-2023)