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.

深层含水层是煤矿常见的地质灾害源，可引发突水突泥灾害。注浆是加固含水层和阻水的最有效方法。但仅在突水区注浆无法获得稳定的效果。采用地下水径流分析和注浆孔优化相结合的方法解决深部矿井突水问题。首先，确定注浆区的构造格局，推算出突水通道的位置，得出矿井地下水径流格局。然后，通过层次分析法对注浆孔质量进行评价，并根据最大隶属度原则确定径流网络中的关键孔。最后，钥匙孔被灌浆堵住了。灌浆处理后，采用工作面进水量和探水雷达对注浆效果进行评价。结果表明，将地下水径流分析与小孔选择相结合，可以有效控制深部开采中的突水。