Method for recultivation of excavations after exploitation of mineral raw materials

摘要

The method of reclaiming excavations after the mineral resources exploitation is characterized by filling an excavation with a mixture of coal bed rocks, drill cuttings and ash to the level of 1-2 m below ground. Afterwards, a 1-2 m layer of artificial soil is created from cuttings separated from drill liquid, biological wastewater treatment plant sludge and top soil accumulated during the preparation for exploitation. In the artificial soil drill cuttings are present in the amount of 10-30%, preferably 20%, sludge is present in the amount of 20-40%, preferably 30%, and top soil is present in the amount of 30-60%, preferably 40%.