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通过在采空区预埋束管进行取样,检测采空区内气体成分随工作面推进进度变化情况,确定出孙家沟煤矿13304采面采空区煤自燃“三带”分布特性,获得采空区自燃带宽度范围。当工作面出现CO异常时,采用了工作面降风均压、自燃带埋管注氮、上下隅角封堵减漏风的综合防灭火措施,取得了良好的防灭火效果。
By sampling in the mined-out area, the gas composition in the gob area was measured and the variation of the gas composition with the progress of the working face was detected to determine the distribution characteristics of spontaneous combustion and “three-zone” coal in the goaf of 13304 coal mining face in Sunjiagou Coal Mine. Access to the spontaneous combustion zone width range. When CO is abnormal in the working face, the comprehensive fire prevention and extinguishing measures are adopted to reduce the wind pressure and pressure in the working face, inject nitrogen with spontaneous combustion buried pipe, and plug the leakage air in the upper and lower corners, and get a good fire extinguishing effect.