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针对色连二矿12205工作面顶板上部存在浮煤的特殊情况,从煤自然发火条件出发,分析了12205工作面收作期间采空区发生遗煤自燃的原因,并根据该工作面的实际情况和各种防火技术特点,提出了“减少采空区漏风、降低采空区氧浓度”的防火原则,制定了顶板铺设风筒布、建黄土隔离墙、注高分子胶体材料、注氮等防火技术。实践证明,该套技术措施有效保障了色连二矿12205工作面的安全收作。
In view of the special situation of floating coal in the upper part of 12205 working face in Seamian No.2 Mine, starting from the natural firing conditions of coal, the reason of spontaneous combustion of coal left in goaf during 12205 working face was analyzed. According to the actual situation of this working face And various fireproof technology features, proposed “to reduce the gob area air leakage and reduce the concentration of oxygen in the goaf” fire principle, the development of the roof laying of haircloth fabric, built the loess wall, injection of polymer colloidal materials, nitrogen injection Fire and other technologies. Practice has proved that the set of technical measures effectively protect the safety of the seamite 12205 face safe take.