Integrated Control Technique of Spontaneous Combustion on Face of Gob-side Entry Retaining with Filling Behind Support

E₁404 fully mechanized coal face of Xiaoqing coal mine is face of gob-side entry retaining with filling behind support,which exists the spontaneous combustion risks of working face forward slowly,ventilation leak in gob-side entry retaining wall,that different from normal mining face.In order to prevent spontaneous combustion caused by residual coal in gob or ventilation leakage in E₁403 goaf,a series of comprehensive fire prevention measures of reasonable air distribution,guniting leakage in retaining wall,spraying inhibitor in gob,filling river sand,injecting nitrogen in goaf,etc.were adopted,which eliminated the accidents of spontaneous combustion and ensured to recover safely and smoothly on Xiaoqing coal mine E₁404 working face.