English
In the coal mine roadway hundreds of meters underground, coal workers stick to their posts day after day, and sweat to extract energy, supporting the lifeblood of industrial development. However, the underground working environment is complex, and various links such as coal mining, excavation, and support will produce a large amount of coal dust and rock dust. Among them, respiratory dust with a particle size of less than 5 microns is the most harmful. Long term inhalation can easily cause irreversible occupational diseases such as coal silicosis, seriously threatening the physical health and life safety of workers.
As the core equipment for personal respiratory protection of coal miners, the breathing half mask is the last and most important line of defense against dust invasion and to protect respiratory health. Choosing a Fandun half mask that is suitable for the underground environment is a prerequisite for ensuring protective effectiveness. Coal mines underground have the characteristics of high dust concentration, humid and foggy environment, high work intensity and long duration (mostly 8-hour shifts). Ordinary civilian dust prevention equipment cannot meet the protection needs, and special breathing half masks designed for mining scenarios must be selected.
When selecting, it is necessary to follow the principles of "efficient dust prevention, sealing and leakage prevention, moisture-proof and durable, comfortable and adaptable", and strictly comply with the national standard GB2626-2019. Among them, high dust core positions such as excavation, slurry spraying, coal mining, etc., prioritize the use of filter materials with a filtration efficiency of ≥ 99.97% for non oily particles above 0.075 microns, i.e. KN100 level protection; Auxiliary positions such as warehouse duty and transportation scheduling can use filter materials with a filtration efficiency of ≥ 95%.
The main body of the face mask should preferably be made of reusable silicone material, which is soft and elastic, has excellent sealing performance, is resistant to moisture and wear, and only requires regular replacement of filter cotton. Long term use is more economical, while cup type disposable face masks are only suitable for temporary and short-term auxiliary operations. In recent years, with the continuous improvement of the concept of coal mine safety production, the research and application of Fangdun breathing half masks have also been continuously upgraded.
The cascade filtration technology launched by scientific research institutions adopts a combined design of metal fiber layer and meltblown fiber layer to achieve initial physical interception of all dust and electrostatic adsorption of fine dust. The comprehensive filtration efficiency can reach 99.98%. At the same time, the metal fiber layer can be used for tapping and cleaning, washing and reusing, effectively solving the problem of rapid growth of respiratory resistance in mining face masks, making it more comfortable for workers to wear and less likely to hold their breath during long-term operations.
Coal miners who participated in the relevant tests provided feedback that the optimized breathing half mask is lighter in weight, odorless in silicone, and has better sealing performance. Even after wearing it for one shift, the mouth and nose can still remain clean, greatly increasing the willingness to use it. Proper dust protection in coal mines is an important part of ensuring the health of miners and promoting safe production. The Fangdun breathing half mask, with professional technology and practical design, builds a reliable respiratory defense line for miners, truly safeguarding the physical health and safety of underground workers, and escorting the high-quality development of the coal industry.
