Abstract
To better understand water inrushes originating from shaft-freezing holes, the hydrogeological conditions and water source were analyzed for a typical inrush case in the Yingpanhao coal mine in western China. The mechanism of this new type of water inrush was identified by considering the stratum movement caused by mining, the concentric annular channels of freezing holes, and the dynamic recharge of multiple aquifers. A new risk assessment model and corresponding grouting method were developed and the problems involving the prediction of water inrush and selection of the optimum grouting position were described. Detailed guidelines for grouting, including the layout of injection boreholes, slurries, grouting pressure and stopping criteria, were proposed. A grouting case targeting this type of water inrush in the Yingpanhao coal mine was introduced. Field studies indicated that open, concentric annular freezing hole channels provide favorable conditions for groundwater migration. The proposed method may effectively inhibit groundwater migration in multiple aquifers and prevent water inrushes through shaft freezing holes and provides an appropriate framework for water inrush prevention for similar mining areas in western China.
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Acknowledgements
This investigation was supported by the Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents (No. 2017RCJJ030), the National Key R&D Program of China (No. 2017YFC0804100); the National Natural Science Foundation of China (No. 51509148). The authors are extremely grateful for the financial support from these organizations.
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Han, C., Xu, J., Zhang, W. et al. Assessment and Grouting of Water Inrush Induced by Shaft-Freezing Holes in the Yingpanhao Coal Mine, Inner Mongolia, China. Mine Water Environ 41, 16–29 (2022). https://doi.org/10.1007/s10230-021-00801-2
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DOI: https://doi.org/10.1007/s10230-021-00801-2