近年来,由于开采深度的增加(平均达450m),苏联主要煤田的开采地质条件较差:矿井瓦斯涌出量、煤和瓦斯突出的危险煤层数及冲击地压均有增加;巷道空气温度增高,排水管路静压增加.例如,布置在400m深的防火管路,其给水静压已达4MPa,当工作状态发生变化时,将额外产生动压,急剧降低了防火管路的可靠性.吉德罗煤炭生产联合公司的专业设计局研制和试验一种适用于矿井条件的大流量静 In recent years, due to the increase of mining depth (averaging 450m), the mining conditions of the main coalfields in the Soviet Union are poor: gas emission in coal mines, dangerous coal layers and rock burst with coal and gas outburst increased; air temperature in roadway increased , For example, the static pressure in the drainage pipe is increased, for example, the fire prevention pipeline arranged at a depth of 400m has a hydrostatic pressure of 4MPa. When the working state changes, an additional dynamic pressure is generated, which drastically reduces the reliability of the fireproof pipe. Adecco Coal Development Associates, a professional design agency, develops and tests a large flow static