Study On Ground Water Environment Impact Of Lead-Zinc Ore Mining And Dressing

Our country is very rich in mineral resources,the mining industry in China’s national economy occupies a very important position,because of extensive use of lead zinc ore mineral, its exploitation is in constant expansion.But the mining is facing a direct question that besides the mining there is some influence on the local groundwater environmental,including the underground water level and groundwater quality impact.This is not only about the problem of the mining production safety,but also related to the environment safety problems.Therefore,be serious to the study on groundwater environment impact of mining has the vital significance,no matter for the production safety,the environmental safety,or the promotion of social sustainable development.The hydrogeological conditions and groundwater status of a certain lead-zinc mine in Hulunbuir were analyzed in detail in this paper,a relatively accurate hydrogeological conceptual model was set up,and we conducted a study quantitative or semi quantitative on the impact of groundwater environment caused by the mine drainage,the change of groundwater flow field and the tailing pond during the production process of the mining area we studied on.The main research results are as follows:1. After the mining of Gaobao hill and Shuangding hill, the groundwater flow field will form a large area of groundwater depression cone around the mining area. Calculate with the "Virtual large diameter well" method, the distribution of water level isoline around Shuangding hill mining area and Gaobao hill mining area is determined, after the groundwater flow field tends to be stable.2.The impact of groundwater environment caused by seepage of tailing pond will be greatly reduced after the impervious treatment to the existing tailing pond. The total seepage discharge will be reduced from151.8m3/dto17.6m3/d.3.Six main elements exceed the standard were found based on the analysis of history and current situation of groundwater monitoring data, they were manganese, fluoride, potassium permanganate index, ammonia, sulfate, and volatile phenol.4.The well water has been unfit for drinking according to the water quality study on current water supply well in the study area.Finally, detailed proposals were put forward for the continued exploitation of the lead-znic mine we studied on according to the conclusions reache.Provided effective guidance for the reasonable production and development of this lead-znic mine.