易燃煤层特大型综放工作面灭火及防复燃技术

Fire Extinguishing and Re-burning Prevention Technology for Extra-large Fully-mechanized Caving Face in Flammable Coal Seam

同忻煤矿8101特大型综放工作面自然发火封闭后,采用挖掘措施巷并在其中打钻孔注粉煤灰浆和采空区注氮等措施扑灭了火区,工作面启封后采取改变通风方式、减风、堵漏、小步距埋管注氮以及合理的防治瓦斯等措施,有效地防止了火区的复燃。分析了综放工作面自然发火的原因及地点,总结了综放工作面封闭灭火和启封后防复燃的方法及效果。

After the sealing of the fire area in 8101 extra-large fully mechanized face in Tongxin Mine, the spontaneouscombustion was put out by driving a service roadway, drilling holes from the roadway into the fire area and injecting fly ash slurryand nitrogen gas from the holes into the fire area. After the reopening of the sealing area, the re-burning of the fire area waseffectively controlled by taking some measures including changing the ventilation mode, reducing air quantity, blocking airleakage, nitrogen injection by buried pipes and gas control. This paper analyzed the cause and location of spontaneous combustionin the fully mechanized caving face, and summarized the fire extinguishing methods and effect of the sealed fire area in the fullymechanized caving face and the re-burning prevention method after the fire area reopening.