梅山铁矿井下渗漏水防治技术

针对梅山铁矿井下防渗漏水对生产安全造成的隐患治理问题，在分析梅山铁矿水文地质条件及矿山开采现状的基础上，开展了井下防渗漏水综合治理技术方案研究与应用。通过现场调查分析了矿山井下渗漏水现状，研究表明地质构造、矿物成分及人为开挖活动是导致部分揭露矿岩在遇水后稳定性下降的主要原因。基于崩落法开采造成地表塌陷，分析了暴雨入渗的特征，并采用水均衡法获得暴雨日入渗率为8%，实现了井下涌水量预测。将井下渗漏水情况分为采区渗水与井筒渗水2种类型。通过综合比较分析，副井、西南井、北风井采用帷幕注浆方案。1#主井采用局部注浆方案；将巷道渗漏水现象细分为顶板淋水、底板及其墙角渗水、巷道墙体预留孔渗水、大面积巷道淋水、渗漏水和围岩中存在异常水包5类，并提出了相应的治理措施。以上方案在梅山铁矿的实施取得了显著效果。

Techniques of Underground Water Leakage Control in Meishan Iron Mine

Aiming at the risk in the production safety caused by underground leakage water in Meishan Iron Mine，the comprehensive governance technology program of underground water leakage was researched and applied on the basis of hydrogeological condition and mining current situation analysis of Meishan iron mine.According to the field status of underground water leakage，it is indicated that the decreased stability of the part of exposed mine rock after meeting water is mainly caused by geological structure，mineral composition，and artificial activities.Based on surface subsidence caused by the caving mining，the characteristics of rainstorm infiltration are analyzed.Water balance method is adopted to forecast water inflow，obtaining that daily rainstorm infiltration rate is 8%.Underground water leakage was divided into mining area leakage and shaft leakage.By comprehensive comparison，curtain grouting is applied to auxiliary shaft，southwest shaft，and north shaft.Local grouting program is used in 1# shaft.Tunnel leakage phenomena were subdivided in 5 types，including roof watering，bottom and corner seepage，tunnel wall holes seepage，large area tunnel watering，leakage and the water pocket in surrounding，and relevant measures for each type were proposed.Significant effect for underground leakage water control in Meishan iron mine was achieved by adopting the programs above.