Study on the Occurrence Characteristics of Groundwater and the Prediction of Water Inflow in the Open-pit of Bayan Obo West Mine
Mining is largely restricted by the development of groundwater,and the slope stability of water-rich rock mass has a certain influence on the safety of mine production.Taking Bayan Obo West Mine as an example,through the statistical analysis of the underground water emergence of the stope,the dynam-ic situation of the groundwater level of the observation hole and the information of the water level of the shot hole in the explosion area,the model is built based on the SURPAC software database and the geological re-port of the mine is used as the basis to realize the three-dimensional visualization of the underground water distribution of the mine.PEST module of Visual Modflow software is used to optimize and calibrate the hy-drogeological parameters of each aquifer in stope,and the water inflow of mine is predicted.By arranging pumping wells,it is predicted that the mine water inflow will be about 4 298.4 m3/d when mining to 1 400 m elevation,which provides a basis for groundwater treatment plan.
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