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| Research on pressure equalization fire prevention and extinguishing technology in goaf of close distance coal seam |
| Xia Pengfei |
| Gequan Mine East Well, Jizhong Energy Co., Ltd., Xingtai 054000, China |
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Abstract In the process of coal mine production in multi-coal seam mining, due to the different ventilation pressure between coal seams, air leakage channels are formed in the fissures in the goaf, resulting in continuous oxygen supply to the goaf. In order to avoid coal spontaneous combustion in the goaf, the pressure equalization fire prevention and extinguishing technology in the goaf of close distance coal seams is proposed. In this paper, the pressure equalization facilities are constructed by using the closed area pressure equalization method in the 2 nd coal seam, so that the 2 nd coal seam goaf is in the same ventilation system, thereby reducing its ventilation pressure. The differential pressure meter and chromatograph are used to continuously observe and analyze the pressure difference and other gases in the goaf. Finally, there is no significant change in toxic and harmful gases in the 2 nd coal seam, and the pressure difference in the goaf is reduced by 210 Pa, which has achieved good pressure equalization effect.
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