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工作面回撤需要很长的一段时间,易燃煤层在这段时间中容易发生自燃,严重威胁煤矿的正常安全生产,并给煤矿带来极大的经济损失。顺通煤矿5243综采工作面在回撤期间出现CO超限,采空区有自然发火迹象,通过对工作面回撤期间的防灭火技术研究,有效控制了CO的浓度,防止了采空区浮煤的自燃,为工作面的顺利回撤提供了有利的条件。
It takes a long time to retract the working face. Spontaneous combustion of flammable coal seam is prone to occur during this period, which seriously threatens the normal safety of coal mines and brings great economic losses to the coal mines. 5230 fully mechanized mining face of Shun Tong coal mine had overrun of CO during the period of withdrawal, and there was a sign of spontaneous combustion in the goaf. Through the study of fire prevention and extinguishing technology during the period of face removal, the concentration of CO was effectively controlled and the goaf was prevented Spontaneous combustion of floating coal provides a favorable condition for the smooth drafting of the working face.