In a feasibility study on water control in the second phase of the mining project, groundwater flow will be cut-off by grouted curtain. To do so, Xingqiao Pyrite Mine has performed supplementary hydrogeological survey and drill hole grouting experiments. The results have confirmed the necessity and feasibility of the groundwater flow cut-off method by grout curtain. Experiences have been gained in parameters design, grouting technology and raw materials selection for the grout curtain.