Taking 9307 fully-mechanized caving face as the engineering background,in order to effectively solve the problem of spontaneous combustion in the goaf,it was proposed to comprehensively use buried pipe and intubation to grouting the goaf during the stoping of the mining face,and then use the nearby 1360 West Roadway to grouting the goaf after stoping.The coal left in the goaf was covered by grouting,the oxygen was isolated and the temperature of the goaf was reduced.Detailed analysis of the grouting technology scheme of 9307 fully-mechanized caving face layout showed that after engineering application,the volume fraction of CO after the hydraulic support at the mining face showed a rapid decreasing trend with the increase of grouting time,and no CO was detected in the goaf and all locations of the mining face one month after the completion of grouting,indicating that the grouting technology used on site had a remarkable effect on fire prevention,which can create a good condition for the safe and efficient withdrawal of 9307 fully-mechanized caving face with high inclination angle.
关键词
综放开采/大倾角煤层/注浆防灭火
Key words
fully-mechanized caving mining/coal seam with high inclination angle/grouting for fire prevention
维普
万方数据