Abstract
Considering that there are very complex hydrogeological conditions, high water level and large quantity of Karst water of Ordovician limestone in Feicheng mining area, and the situation of safety mining of lower coal seams is affected, numerical simulation study of grouting reinforcement of Karst water inrush of Ordovician limestone is carried out. The COMSOL and PFC software were used to study the variation of pressure field, flow field, stress field and water inflow of stope before and after the grouting reconstruction of Ordovician limestone roof. The results show that streamline distribution of flow field becomes very sparse, stress gradient is obviously reduced, and with the increase of depth of grouting, spatial distribution of groundwater pressure field becomes more uniform, water inflow is obviously reduced, which show that water-resisting ability of Ordovician limestone roof has been improved. In addition, it is determined that the optimal depth for grouting reconstruction is about 60 m below Ordovician top.
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Acknowledgments
The authors acknowledge the financial support provided by the National Key Research and Development Program of China(No.2016YFC0801604)
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Wang, H. et al. (2018). Numerical Simulation on Seepage Law and Thickness of Reinforcing Ring of Mine Ordovician Aquifer. In: Qiao, F., Patnaik, S., Wang, J. (eds) Recent Developments in Mechatronics and Intelligent Robotics. ICMIR 2017. Advances in Intelligent Systems and Computing, vol 691. Springer, Cham. https://doi.org/10.1007/978-3-319-70990-1_40
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DOI: https://doi.org/10.1007/978-3-319-70990-1_40
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