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| Regional control and analysis of No.8472 face in Yangdong Mine |
| Cao Dong |
| Yangdong Mine, Jizhong Energy Fengfeng Group Co., Ltd., Handan 056200, China |
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Abstract The hydrogeological conditions of Yangdong Mine of Fengfeng Group are complex. At present, the No.2 coal and No.4 coal working faces are all threatened by the floor Ordovician limestone. It was the focus of this paper to explore and grout the Daqing limestone aquifer under No.4 coal seam by using the advanced grouting reinforcement technology in the ground area to realize the safe mining of No.2 coal and No.4 coal. This paper discussed and analyzed the whole process of regional control of No.8472 face in Yangdong Mine, and provided technical reference for the control of adjacent working face in the future.
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