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| Technology transformation from pre cast concrete along goaf to super high water gob-side entry |
| Lu Zhimin1,2,3, Hao Yongchao1,2,3 |
| 1. Hebei Coal Research Institute Co., Ltd, Xingtai 054000, China; 2. National Energy Backfilling Mining Technology Key Laboratory, Xingtai 054000, China; 3. Hebei Filling Mining Technology Co., Ltd, Xingtai 054000, China |
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Abstract Shanxi Jiexiu Zuozegou Mine 2202 working face conducted ultra-high water along the goaf, and technology transformation was made from pre cast concrete along goaf to super high water gob-side entry from the support design, advanced support, filling process 3 aspects. The results showed that this technology can effectively alleviate the tension of mining alternate situation and improve the coal recovery rate.
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