The Special Fire Prevention and Control Technology During Residual Mining Phase in Yangcun Coal Mine

As aged mine, Yangcun Coal Mine took coal pillar and working face of low slice as mining face which encircled by complicated goaf and old drifts. Top and bottom drifts were often intersected with other old drifts during drifting, and meanwhile the working face was often confronted with severe air leakage. Experiment proved that if the methods including blasting driving, old drift sealing, and grouting and water injection during roadway passing section, as well as the methods such as asymmetric nitrogen injection and adjustment of ventilation system in goaf during extraction are applied to fire prevention and extinguishing during the driving of working face, good effect for the prevention of spontaneous fire can be achieved.