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为了解决某煤矿3304综放工作面缩面改造期间因采空区遗煤多、停采撤架时间长、漏风条件复杂而引起的采空区煤炭易于自燃的问题,分析了3304工作面缩面改造期间采空区遗煤易于自燃的原因,并提出了由注水、均压、注浆组成的综合防灭火技术体系。通过监测发现,采取上述措施后,回风隅角的CO浓度从停采初期的7.8×10-5下降到缩面完成时的1.0×10-5,回风流的CO浓度从5.8×10-5下降到0,有效地抑制了采空区遗煤自燃,保证了3304工作面缩面改造工作的顺利进行。
In order to solve the problem of spontaneous combustion of coal in the goaf due to the large amount of left over coal left over from the goaf, the long time of withdrawal and removal, and the complicated air leakage conditions, the 3304 working face shrinkage During the reconstruction period, the cause of coal spontaneous combustion in the goaf is prone to spontaneous combustion, and a comprehensive fire extinguishing system composed of water injection, pressure equalization and grouting is proposed. Through monitoring, CO concentration in the return air corner decreased from 7.8 × 10-5 at initial recovery stage to 1.0 × 10-5 at the completion of shrinkage, and the CO concentration in return air flow increased from 5.8 × 10-5 Down to 0, effectively suppress spontaneous combustion of coal left in the goaf, to ensure the smooth progress of 3304 face reduction work.