Abstract
Dahongshan Iron and Cooper mine in Yunnan Province are respectively the second and the third batch of National green mining pilot units. In order to test the green mine promoting effect and better drive other mining enterprises in Yunnan province to build green mines, we investigated the water body, farmland soil, vegetation and geological environment surrounding the mine in August 2016. By adopting both the single factor index method and Nemero multi-factor index method, the pollution indices were calculated to assess pollution extent, The Pi values of Cu and Ni of 4 soil samples in the 19 sampling points were greater than level l and slightly polluted, while the Pi values of one sampling point in Cu were greater than level 2, which was moderately polluted. From the comprehensive pollution index, one sample point was between 2-3, indicating that all soil crops were moderately polluted, and one sample point was between 1-2, indicating that the soil was lightly polluted and the crops began to be polluted. The two samples were all between 0.7 and 1, indicating that they were still clean and the remaining 15 samples were all less than 0.7, indicating that they were safe and uncontaminated. Some visible achievements have been made in the construction of green mines.
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