复启工作面回撤期间防灭火技术

针对屯宝煤矿在停采回撤期间采空区易自燃的情况,分析了M15煤层采空区自然发火的特点及治理难度,在末采期间采用常规防灭火技术手段来消除采空区自然发火隐患。但工作面由于存在异常高温点被迫长期封闭,常规的防灭火手段难以消除高温点,通过施工消火道,减少防灭火钻孔的施工长度,提高钻孔精度,再注防灭火材料的方式降低异常高温点区域煤温,确保工作面能顺利启封并安全回撤。

Fire Prevention and Extinguishing Technique During Retraction of Restarting Working Face

Aiming at the situation of spontaneous combustion in goaf during stop-mining and withdrawal in Tunbao Coal Mine,the characteristics of spontaneous combustion in goaf of M15 coal seam and the difficulty of controlling are analyzed.During the last mining period,conventional fire-fighting techniques were used to eliminate the hidden danger of spontaneous combustion in goaf.However,the working face was forced to be closed for a long time due to the existence of abnormal high temperature points;the conventional means of fire prevention is difficult to eliminate the high temperature point.Through the construction of fire extinguishing channel,reduce construction fire prevention drilling in length,improve the drilling accuracy,reinject fire-fighting material to reduce the abnormal high temperature point area,the coal temperature in the abnormal high temperature point area can be reduced.