The Forecast Of Water Inflow During Open Pit Mining And Water Quality Evaluation In Qidashan Iron Mine

Qidashan Iron Mine is located in the northeast of Anshan City, which is one of alarge-scale iron ore production base and furrow pit of Anshan Mining Company. It hasbeen explored nearly a century since its start in1914. Pit gushing is a significant problemwhen exploring. The accident caused by pit gushing will be s threat to the safety ofpeople and the property of the state. In addition, long-term mine drainage and the single,low, unreasonable utilization of water use can easily lead to the problem of watershortages. Therefore, predicting of mine water inflow accurately and evaluation of waterquality objectively is quite important in guiding mine production safety work an theutilization of water resources.By investing the hydrogeological conditions of iron ore mine and the capacity of theacquire, this passage forecasts the actual inflow by analogy method and Dajing method.Then, we compare these two method results and reach the conclusion that these twomethods have similar results. In order to mine production safety considerations, we takethe larger result. The analogy method of water inflow forecast the Qidashan Iron-270melevation is56000m~3/d, the largest inflow3445800m~3/d.To the actual water quality of iron ore, we evaluate the water quality in two aspects.One is groundwater quality; the other is supply water quality. Firstly, we use of fuzzycomprehensive evaluation method and the traditional comprehensive evaluation methodto evaluate the water quality of the underground mine water. The evaluation factors aresalinity, total hardness, chloride, sulfate, fluoride ions, iron and nitrate. The results showthat the fuzzy comprehensive evaluation method can reflect the actual groundwaterquality more objectively and accurately. Thus we could use groundwater resources moreeffectively over the degree of groundwater quality.Secondly, according to the analysis of water quality data, the content of arsenic, iron,manganese and oxygen consumption all excess the standard. The content of phenol alsoexceeds in some place. The water quality of upstream river located in east-west directionthroughout the mine River is good. The indicators in it are all within the drinking waterstandard. Furthermore, Surface water and groundwater are the boiler scale water, not sparkling, semi-corrosive water, non-aggressive in ore area. According to the analysis ofthe actual situation, mine drainage will have an influence on Mine Water Resources. Inthis case, we provide the prevention and control measures to the water conservation.Under the premise of the mine safety, we could ensure the life and water safety. Thiscould not only improve the production efficiency of the mine, but also the protection ofdrinking water safety and ecological environment of the residents around the mines. It isa very important practical significance.