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- W2393845194 abstract "To reduce gas concentration in the upper corner and return airway of Ting Nan coal mine 204 work surface, through research and analysis of the gas migration law and accumulation area of the 204 stope face, this paper adopted the upper corner of buried pipe drainage, high roadway drainage and injection nitrogen isolation technical measures. Experimental results show that the joint use of the upper corner of buried pipe and high roadway drainage made the gas extraction amounted to 40.98 m3/min in the upper corner, reduced the gas concentration and prevented gas accumulation in the upper corner. At the same time the gas pressure in the return airway was relieved. Injecting nitrogen isolate gas technology forms a gas isolation belt in the direction of working face, which prevents the goaf gas into coal working face and reduces the mining coal working surface gas concentration. The implementation of Ting Nan mine 204 working face gas control measures succeeded in preventing gas accidents and ensured the safety production of coal mine." @default.
- W2393845194 created "2016-06-24" @default.
- W2393845194 creator A5086241147 @default.
- W2393845194 date "2015-01-01" @default.
- W2393845194 modified "2023-09-22" @default.
- W2393845194 title "The 204 face of Tingnan Mine gas migration law analysis and governance technology research" @default.
- W2393845194 hasPublicationYear "2015" @default.
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