Abstract: The traditional technology of drainage before mining is not applicable for the mine with large water inrush and complicated hydrogeological conditions.Through deep research and development of underground mine water prevention and control technique,roof limestone grouting water plugging technology near ore-body in pit to control water,achieved good results.The general idea of this technique is that limestone filling and compacting the karstic roof fissures near ore-body can connect the limestone to form water-resisting layer.By this method, an inclined waterproof curtain in parallel with the ore bodies is formed to prevent the groundwater flowing into the stope.Combining with the case,the design concept,implementation method and application effect of the grouting water plugging technology for water-rich underground mining are analyzed.According to the properties of ore deposits,ore body and minerals and its hydrogeological conditions in mining area,the engineering arrangement and statistical methods for drilling and grouting volume are demonstrated,and the principles and methods of determining grouting technical parameters,such as the safe thickness of grouting layer,water plugging process design of roof grouting,grouting method,grouting sublevel height,high pressure water test,grouting sequence and grouting parameters,etc.are analyzed.

Key words: Water-rich mine, Grouting, Water plugging, Technology