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| Research on comprehensive fire prevention and extinguishing technology during stopping mining and removing support in filling working face |
| Zhu Yong |
| Xingdong Mine, Jizhong Energy Co., Ltd., Xingtai 054000, China |
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Abstract In order to ensure the safety of stopping mining and removing support in 11313 filling working face of Xingdong Mine, based on the analysis of spontaneous combustion factors in filling working face, the fire prevention and extinguishing technical measures of ' before removing support, during removing support and after removing support ' were put forward, and the air leakage reduction, spraying inhibitor, reducing ventilation and timely filling were comprehensively used to prevent the oxidation and spontaneous combustion of residual coal. The field application shows that after using this technology, the CO concentration of the return air flow during the whole withdrawal period is up to 36×10-6, the temperature of the working face is up to 35 °C, the CO concentration of the return air flow and the temperature of the working face are controlled within a safe range, which effectively suppresses the oxidation and spontaneous combustion of the residual coal and ensures the safe and smooth completion of the withdrawal work. This technology can provide reference for fire prevention and extinguishing under similar working conditions.
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