Fire Extinguishing Technology Ssing Borehole Drilling In Closed Fire Zones of Coal Mines

In order to provide a channel for centralized injection of gas or sealing materials from the ground to the underground fire zone, and thus achieve safe mining of the underground 708 working face. Five fire extinguishing boreholes and one monitoring borehole were drilled on the construction ground of the west wing coal seam of Mount Huangshan Coal Mine, and comprehensive fire extinguishing measures such as injecting liquid CO, injecting fly ash, yellow sand, green sand, loess and LFM light filling materials were taken, with a total plugging space of 877.8m3. The monitoring results show that the fire area of the+708 working face has been extinguished, indicating that the drilling fire extinguishing technology adopted has played a good role in controlling the closed fire area of the underground 708 working face.