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| Research and application of grouting reinforcement technology for super high water material in old roadway |
| Dong Xiaojuan1,2,3 |
| 1. National Energy Key Laboratory of Backfilling Mining Technology, Xingtai 054000, China; 2. Hebei Coal Research Institute Co., Ltd., Xingtai 054000, China; 3. Hebei Backfilling Mining Technology Co., Ltd., Xingtai 054000, China |
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Abstract Super high water material is an inorganic grouting filling material developed in recent years. It has the characteristics of short solidification time, high early strength and good fluidity. Super high water material grouting filling can fully enrich the space in the old roadway, prevent harmful gas agglomeration and coal seam spontaneous combustion, and the filling body can bear the advanced stress of the working face with the surrounding rock. In order to ensure the safety of the old roadway during the mining period and prevent the overflow of toxic and harmful gases, the research and application of the grouting reinforcement technology of the old roadway with super high water material was put forward in Xipang mine of Dongpang mine. Through the grouting reinforcement of the old roadway during the mining period, the normal mining of the working face during the old roadway was ensured, the mine production was ensured, and the good application effect was obtained.
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