极复杂水文地质条件下矿井堵源截流技术应用研究

平禹一矿水文地质类型为极复杂型，历史上多次发生灰岩承压水突水淹井和淹采区事故，矿井主采二₁煤层、二₃煤层，当前矿井总涌水量为2 000 m³/h。中央泵房排水能力3 300 m³/h，五采区中央泵房排水能力3 200 m³/h，中央泵房及五采区中央泵房均采用独立系统，井下水可分别直排地面。平禹一矿岩溶水补给量较大，疏水降压存在着排水量大、降压目标难以实现的困难，经研究论证，通过采取地面注浆和井下注浆的堵源截流技术，切断岩溶水进入矿井导水通道，可以完全或部分消除岩溶水对二₁煤层开采的威胁。经过Ⅰ期（2009—2010年）和Ⅱ期（2013—2014年）2次堵源截流工程施工，矿井涌水量显著减少，特别是Ⅱ期工程实施后，堵水效果明显。通过堵源截流技术在平禹一矿的应用，封堵了充水通道，减少了矿井排水量，降低了矿井生产成本，有效保护了地下水资源，同时保证了矿井带压开采的安全性，具有明显的经济和社会效益。

Application research on closure work and water source blocking technology in extremely complex hydrogeological conditions

The hydrogeological condition of Pingyu No.1 Mine is very complex，and there have been many accidents of water inrush and flooding in limestone confined water in history.Ⅱ₁，Ⅱ₃ coal seams are the main coal seam being mined，the current mine total yield is 2 000 m³/h.The drainage capacity of the central pump room is 3 300 m³/h，and the drainage capacity of the central pump room in the five mining areas is 3 200 m³/h.The central pumping station and the central pump room of the five mining area all adopt an independent system，and the underground water can be directly discharged into the ground.The amount of karst water recharge in Pingyu No.1 Mine is large，the drainage volume of drainage is large and the target of reducing pressure is difficult to achieve.Through the study and demonstration，the threat of karst water to Ⅱ₁ coal seam mining can be completely or partially eliminated by cutting the karst water into the mine guide channel through the technology of ground grouting and downhole grouting.With the construction of closure work and water source blocking engineering in Ⅰ period（2009—2010） and Ⅱ period（2013—2014），mine water inflow has been significantly reduced，especially after the implementation of Ⅱ period engineering，water plugging effect is obvious.According to the closure work and water source blocking engineering applied in Pingyu No.1 Mine，the water filling channel is blocked，the drainage capacity of the mine is reduced，and the production cost of the mine is reduced，and the safety of mine belt pressure mining has been guaranteed，which has obvious economic and social benefits.