Ventilation for underground mines plays an essential role in production activities by ensuring labor safety and maintaining environmental conditions. Mine ventilation is also one of the most effective methods for preventing methane gas and coal dust explosions. Therefore, it is necessary to investigate the ventilation network annually and calculate the overall ventilation requirements for underground mines in the Quang Ninh coalfield. Based on the production plan and ventilation needs of the Khe Cham Coal Mine, the authors surveyed and evaluated the mine ventilation network, thereby proposing solutions to improve the ventilation system and calculating the ventilation parameters for 2025. To achieve the research results presented in this article, the authors used methods such as data collection, analysis and synthesis, field surveys, result analysis and evaluation, combined with numerical modeling using ventilation software to verify calculation results. To ensure ventilation for Khe Cham Coal Mine in 2025, two main fan stations – №1 at level +35 and №2 at level +112 should be operated jointly, with the following calculated working modes: fan station №1 at level +35: airflow of 193.72 m³/s, air pressure of 448 mmH₂O, impeller angle of 40°; fan station №2 at level +112: airflow of 155.8 m³/s, air pressure of 419.5 mmH₂O, impeller angle of 35°. Based on the analysis of data collected at the Khe Cham Coal Mine, the paper assesses the overall ventilation status of the mine. It proposes solutions to improve the ventilation network, ensuring safety during production activities. Additionally, it determines the combined working mode of the two main fan stations, providing a foundation for developing the general ventilation plan for Khe Cham Coal Mine in 2025.
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Nguyen et al. (2025) studied this question.