Research on nitrogen injection fire prevention technology in goaf of fully mechanized top coal caving face in spontaneous combustion coal seam of Zhuxianzhuang Mine
YANG Zequan
Abstract：Injecting nitrogen into the air-mining area is one of the effective methods to control the risk of natural fire in this area,in which the location of the nitrogen injection point and the amount of ni-trogen injected are the key parameters to determine its effectiveness.In this study,the influence of ni-trogen injection technical measures on the effect of suppressing the natural ignition in the mining air-space was systematically investigated by taking the working face of spontaneous combustion-prone coal seam 884 in Zhuxianzhuang Coal Mine of Huabei Mining Company Limited.The research finds that nitrogen injection into the goaf can effectively reduce the width of the oxidation zone in the goaf,inhibit spontaneous combustion,and ensure safe mine production.The best location of nitrogen injec-tion port in the air zone on the inlet side and the return side of 884 workface is 27 m inside the air zone on the inlet side and the return side,and the best nitrogen injection capacity is 800 m3/h.The research results provide reference value for the implementation of fire prevention measures in the mining area under the conditions with similar geological characteristics.
Keywords：spontaneous combustion coal seamfully mechanized top coal caving facenitrogen injectionfire preventionspontaneous combustion
Publication Date：2025-08-10
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 16-21 )