To improve the safety production guarantee capability of the fully mechanized mining face with high mining height,it is necessary to solve the problem of spontaneous combustion of residual coal in goaf.Taking the 5303 coal mining face as the research object,combined with the geological conditions of the mining face site,the current application status of fire prevention and extinguishing technology,and the analysis results of CO exceeding the return air corner,optimization measures for fire prevention and extinguishing technology were proposed.This measure specifically optimized the nitrogen injection layout points by monitoring the"three zones"of spontaneous combustion in the goaf,in order to improve the nitrogen injection effect,and destroyed the oxidation and spontaneous combustion conditions of residual coal in the goaf by reducing the amount of residual coal and air leakage in the goaf.After on-site application,the problem of CO exceeding the limit in the return air corner of the 5303 coal mining face was solved,and no CO was detected in the mining face and return air flow.The optimized measures of fire prevention and extinguishing technology adopted can meet the safety mining needs of the fully mechanized mining face with large mining height.
关键词
厚煤层/大采高工作面/防灭火/采空区遗煤
Key words
thick coal seam/working face with large mining height/fire prevention and extinguishing/residual coal in goaf
维普
万方数据