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| Practice of fast mining technology for large section rock roadway in Zijin Mine |
| Zhang Xianbo |
| Jinzhong Company, Jinneng Holdings Coal Group, Jinzhong 030600, China |
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Abstract By analyzing the existing gunnery technology, Zijin Mine of Jinneng Holding Group obtained the subjective and objective factors affecting the speed of roadway digging. On this basis, setting gangue bin, adopting side discharge rock loader and optimizing construction organization improved the mining speed of 6 coal track downhill with a maximum daily mining of 4.5 m. Moreover, the roadway section was stable and the shrinkage rate was small, which achieved better results.
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