Abstract
Deep aquifers are a common geological disaster source in coal mines and they can lead to water and mud inrush disasters. Grouting is the most effective method to reinforce aquifers and block water. However, grouting only at the water inrush area cannot obtain a stable effect. A combination of groundwater runoff analysis and grouting keyholes optimization was adopted to solve the problem of water inrush in deep mines. First, the structural pattern of the grouting area was identified and the position of the water inrush channel was deduced, yielding the mine’s groundwater runoff pattern. Then, the quality of grouting holes was evaluated by AHP analysis and the keyholes in the runoff network were determined according to the maximum membership degree principle. Finally, the keyholes were blocked by grouting. After the grouting treatment, the grouting effect was evaluated by using working face water inflow and water detection radar. The results indicate that combining groundwater runoff analysis with keyhole selection can effectively control water inrush in deep mining.
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Acknowledgments
This research is funded by the National Natural Science Foundation of China under Grant Nos.51908329, U1706223, 51779133, and 51879152, and the Natural Science Foundation of Shandong Province under Grant No. ZR2018MEE047.
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Bai, J., Zhu, Z., Liu, R. et al. Groundwater runoff pattern and keyhole grouting method in deep mines. Bull Eng Geol Environ 80, 5743–5755 (2021). https://doi.org/10.1007/s10064-021-02102-y
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DOI: https://doi.org/10.1007/s10064-021-02102-y