Abstract:In order to consolidate the anti-seepage capacity of acid water reservoir and improve the control level of leakage risk, in recent years some mine enterprises have carried out anti-seepage treatment on acid water reservoirs that have basic anti-seepage and have been in operation for many years but have no clear anti-seepage regulations at that time. For the anti-seepage project of acid water reservoir, environmental management research was carried out which including the implementation of environmental protection measures during construction period, hidden projects in key parts (such as cement clay grouting, chemical grouting, HDPE geomembrane anti-seepage), and up-to-standard emission. Finally, the implementation effect of anti-seepage treatment project was analyzed. The results were indicated that pollution prevention and control measures about wastewater, exhaust gas, noise, and solid waste during construction period, as well as ecological restoration measures, have been fully implemented; The hidden engineering construction is consistent with design documents at aspect of the complete scope, the same materials and standardized methods, the grouting construction quality and anti-seepage effect are generally good; The pollutants such as exhaust gas emission meet the standards and have no adverse effects on surrounding environment. The pollution prevention and control measures are effective and feasible. After implementation of anti-seepage treatment project, the seepage water has been effectively controlled. The vertical combination anti-seepage system constructed by cement clay grouting, chemical grouting, and HDPE geomembrane anti-seepage has been running well. Finally, it was recommended tostrengthen the observation of seepage at the dam toe during high water level operation of acidic water reservoir in wet season, and to track and evaluate the effectiveness of anti-seepage treatment in acid wter reservoir.