Fire prevention and extinguishment technology during the stop-mining and withdrawing in fully mechanized working face with large mining height

In view of the problem of coal spontaneous combustion dangerous during the stop-mining and withdrawing of 221_up 06A working face of Shirawusu Coal Mine, based on the fact that there were many residual coal, coal fragments and air leakage passages in fully mechanized working face with large mining height, the key precautionary areas of coal spontaneous combustion during the stop-mining and withdrawing were analyzed. Through the methods of pre-buried fire prevention pipelines, construction of separation walls and gas monitoring during the final mining of the working face, to prevent the coal spontaneous combustion hazards that may occur during the stop-mining and withdrawing in advance; during the stop-mining and withdrawing, methods such as injecting glue at the end of the working face and between the racks, inertizing the mined-out area by nitrogen injection effectively controlled the coal spontaneous combustion of the working face during the stop-mining and withdrawing, ensuring the safe withdrawing of the working face support.Practical experience has been accumulated for the prevention and control of coal spontaneous combustion during the stop-mining and withdrawing in fully mechanized working face with large mining height.