Fire Prevention and Control Technology for Initial Mining Period of No.1901 Coal Mining Face in Yuanbao Mine
Abstract：According to the over long period from the open-off cut formation to the coal mining face started to push forward,the slow pushing forward of the coal mining face,over high ventilation quantity and the CO density abnormal phenomenon occurred in the goaf of No.1901 Coal Mining Face in Yuanbao Mine,there were four fire prevention and control measures conducted including the ventilation quantity adjustment,the sealing wall established near the top and low corners in the goaf of the coal mining face,the spraying with the retarder and the nitrogen injection in the goaf.The effect after the measures conducted showed that the first three measures could only release CO abnormal phenomenon in the goaf in certain degree,but the nitrogen injection in the goaf could eliminate the spontaneous combustion danger in the goaf.With the nitrogen injection in the goaf,the analysis on the variation tendency of main gas density showed that the O2 volume fraction reduced from 10% to 6% would be the best stage of the nitrogen injection effect.Based on the circumstances,the fire prevention and control conducted could eliminate the spontaneous combustion danger caused by the slow pushing forward of the coal mining face.
Keywords：Yuanbao Minefully mechanized top coal caving mininginitial mining periodspontaneous combustionfire prevention and control technology
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)