The techno-economic study for the pilot restoration of the mining waste of the Kokkinozeoula mine in Mitsero was elaborated based on the conclusion of the strategic study for the restoration of abandoned mines that was carried out earlier. The study proposed three alternative scenarios for the restoration of mining waste from which the following was chosen:
1) Earthworks for the reshaping and the stabilization of the mining waste dumps with a gradient of 27 ° at the bottom of the dumps and a 30 ° slope at the top of the dumps with a width of 8 m and a height of 15 m.
2) Prevention and handling the formation of acidic drainage from the waste dumps rich in sulphide minerals, by creating a protective layer with the following characteristics:
Above the mining wastes, a layer of limestone with thickness 40 cm will be deposited to neutralize the acidity of the wastes. Above it a layer of limestone graded aggregates will be placed in order to work as a drainage zone. The drainage zone will be covered with a layer of top soil, 50 cm thick on the horizontal surfaces, and 30 cm thick on the slopes.
3) Planting the reshaped waste dumps with shrubs and bushes, which they should be irrigated during the initial stages of the restoration.
4) Monitoring the stability of the reshaped waste dump, the geochemical restoration and the success of reforestation, with annual inspection soil sampling.
007_Pilot_Kokkinopezoulas_Final_Report_Final.pdf