Application of Directional Drilling Technology for Fire Prevention and Extinguishing in Coal Mine Goaf

For the problems of abnormal temperature points and seriously exceeded CO (carbonic oxide) concentration, emission rate in goaf of Hanzui Coal Mine, through the analysis of mine geology data and dangerous omen, we determine to construct directional drillings towards abnormal points in mined-out area using directional drilling technique, then pour the yellow mud and fire-prevention materials into objective target through the drillings. The abnormal zone temperature and CO concentration are successfully reduced, which can provide a guarantee for the mine safety production.