Research and application of oxygen supply system in Changcun Coal Mine refuge haven.

In order to complete the construction of Changcun Coal Mine refuge haven, the research determined that the contents of multilevel oxygen supply system and principles of ground drilling system, mine pressure ventilation system, oxygen supply and purification equipment system according to theoretical analysis. The air supply volume of mine pressure ventilation system is 300 L/min after calculation according to temperature balance principle. The oxygen supply volume is 484 m³ in 96 hours for 100 people on the basis of oxygen amount per capita and space function. The air volume is 468 m³/h to absorb excess carbon dioxide according to the situation of carbon dioxide emission per capita. The pressure loss experiment of chemicals in purification equipment gains the conclusions that the faster wind, the more pressure loss and the pressure loss increases significantly when the wind speed overpasses 5 m/s. The deployment experiment gains the conclusion that the air supply and returning system can keep the refuge haven 160 Pa pressure difference inside. The research can provide scientific basis and experimental data for the construction of air supply system of refuge haven. [ABSTRACT FROM AUTHOR]