在矿井通风系统中,无论巷道、工作面或采空区,风流方向总是从高压端流向低压端,风量大小取决于风路两端点间压力差和两点间的风阻。均压通风防灭火的基本原理就是采用风压调节技术使火区或有自燃危险的区域(如采空区)的进、回风侧压差尽量减小,乃至为零,使之少漏风或不漏风,以消除自燃三要素之一的供氧条件,防止煤和硫化矿石自热和自燃或使火区缺氧而灭火。均压通风在矿井防灭火中可以用于以下4种情况: In the mine ventilation system, regardless of the roadway, face or goaf, the direction of the wind flow always flows from the high pressure end to the low pressure end. The amount of wind depends on the pressure difference between the two ends of the wind path and the wind resistance between two points. The basic principle of equalizing ventilation and fire prevention and extinguishing is to reduce the pressure difference between the inlet side and the return side of the fire area or the area with spontaneous combustion (such as the goaf) by using the air pressure regulating technology, or even zero, Leakage, in order to eliminate one of the three elements of spontaneous combustion of oxygen, to prevent coal and sulfide ore from heat and spontaneous combustion or oxygen fire and fire. Pressure equalization ventilation in mine fire prevention can be used in the following four situations: