Research and practice on fire prevention technology of fully mechanized caving face during the working period
LI Jindou
Wang Dan
Abstract：During the working period of the 51507 fully mechanized caving face in Liuyuanzi Coal Mine,Qingyang City,Gansu Province,there was residual coal in the goaf and floating coal in the upper part of the roof,resulting in a short spontaneous combustion period of the coal seam and a severe fire pre-vention situation.Starting from the conditions of coal seam spontaneous combustion,this paper analy-zes the factors and reasons for the occurrence of residual coal spontaneous combustion in the goaf of the working face.Based on the actual situation of the working face,targeted fire prevention principles with"reducing the oxygen concentration in the goaf"as the core are proposed,and comprehensive fire prevention measures such as controlling air leakage,nitrogen injection,slurry injection,and colloidal material injection into the goaf are formulated.Practice has proven that this set of technical measures ensures the safe operation of the 51507 working face.
Keywords：coal seam spontaneous combustionair leakagenitrogen injectiongroutingglue injection
Publication Date：2025-02-24
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)