Composite layer, method for controlling acidization of mining slag heap yard and revegetation method
A composite layer and soil yard technology, applied in the field of composite layer and vegetation reconstruction, can solve the problems such as the inability to prevent the oxidation and re-acidification of sulfur minerals, the difficulty in solving the pollution of the mining area and the environment, and the difficulty in borrowing soil, so as to avoid vegetation degradation, The effect of improving the environment and maintaining soil and water
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[0068] Take the exposed polluted slope in the ecological restoration of a copper mine slag dump in Jiangxi as an example.
[0069] The polluted side slope of the mine muck yard is 30m high, the slope is 55°, and the treatment area is 2000m 2 . The slope surface is bare with no vegetation growing. The surface and lower layers of the slope contain a large amount of sulfide and sulfur-copper minerals, and the surface muck contains a variety of heavy metals, including Pb, Cu, Zn, Cr, etc. Due to the long-term exposure, under the joint action of oxidation and precipitation, the soil is severely acidified and heavy metals are lost, and the soil pH value is between 3.5 and 4.5.
[0070] Adopt the method of the present invention to carry out acid resistance control and vegetation rebuilding to this place, concrete process is as follows:
[0071] 1. Build intercepting ditches at the top of the slope, and build drainage ditches on both sides and at the bottom of the slope to prevent ...
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