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为有效解决田陈煤矿3下518里工作面CO气体浓度过高的问题,首先经检测分析CO来源,然后分析有害气体涌入的原因;得出超前支撑压力造成的煤体破坏,采空区冒落引起煤柱裂隙扩大以及3下518里工作面附近有多组小断层是造成采空区CO向工作面涌入的主要原因。对此,采用了通风系统优化、煤层注水、注浆封堵等综合措施。经对工作面各处检测检查,得出这些措施的综合运用有效解决了3下518里工作面有害气体浓度过高的问题。
In order to effectively solve the problem of over-high concentration of CO gas in the work face of 518 in Tianchen coal mine, the CO source was firstly detected and analyzed, then the reason of influx of harmful gas was analyzed, and the destruction of coal body caused by advance supporting pressure was obtained. Collapse caused by the collapse of the coal pillar and the collapse of 3 518 days near the face of a small group of small faults is the main cause of the gob CO influx into the face of the main reasons. In this regard, the use of ventilation system optimization, coal injection, grouting and other comprehensive measures. After inspecting and inspecting the working face, it is concluded that the comprehensive utilization of these measures effectively solved the problem of excessive concentration of harmful gas in the work face of 3 under 518 miles.