Abstract. The history of mining activity, which has been the economy engine in the region and has contributed to the formation of many localities, has been deleted too quickly. During all this time, in the world countries which have invested in mining sector have made considerable progress. The paper brings in question, within the framework of the theme, the implications arising from the abandonment of the Romaltyn project which mainly affects two objectives: Central Tailing Pond and Aurul Tailing Pond. The Central tailing pond constitutes an unfortunate source of pollution for groundwater, surface water, soil and air on a large area around it, because its location upstream of Baia Mare city and in the vicinity of a agricultural production zone. The consequences of the tailing pond maintenance in the current situation are: presence of sclerozing dust with sulphurs content scattered over large agricultural area; soil pollution by acidification; heavy metals release which enter in food chain and will be found in food. The final disposal of the pollution source is the only solution really safe in long term. Abandoning Aurul tailing pond in the current phase of construction involves high environmental risks. Taking in consideration the potential and the huge soil volume which are necessary for rehabilitation, isolation and rehabilitation of this area involve extremely high costs and the realization is, technically, almost impossible in the current context.

This paper is made within the European project GoldenEye Nr. 869398 Type Horizon 2020 and aims at geometrization in 3D format of the Rosia Poieni deposit. This geometrization will be based on the information on the contents of the deposit, the economic analysis, and the calculations of the stability of the open pit and the adjacent industrial waste dumps. The analysis of data from the literature on content is in a very wide and insufficiently relevant range. The study will be based on the latest scanning technologies, AI, numerical simulations (FLAC 2D), which will form the basis of an economic analysis and forecast of metal prices in the future in order to identify exploitable limits both horizontally and vertically. Depending on the extension of the exploitation area and the definition of the deep exploitation limit by up-to-date exploitation, stability calculations will be performed, which will finally allow the geometry and safety of the deposit. Also, this geometrization will allow the decision-making of exploitation, extension, optimization by the management team and the administrative council of CUPRUMIN ABRUD S.A.

The drilling and blasting operation represents an important component of the whole complex of operations specific to the activity of exploitation of mineral resources through explosives blasting, both economically and in terms of environmental impact. The extraction activity requires the preparation of a complex document called drilling and blasting monograph that includes the elements of the drilling design with the geometric characteristics of the location and the diameter of the boreholes, respectively the choice of the explosive and the sequencing method. The present paper represents a synthesis of the extensive works carried out as part of the Horizon 2020 - Goldeneye European project, through Grant Agreement 869398.

With the economic development, with the increase of production and consumption, large quantities of waste result annually, which, improperly stored can affect the quality status of the environmental factors. At the same time, improper management of these wastes can lead to serious cases of contamination of water, soil and air and may also threaten the health of the population. Eco-friendly landfills are a safe way to dispose of waste today. In order to limit the harmful effects on the environment, they must be designed and executed in such a way as to meet the current technical, environmental and economic impact requirements. Due to the composition of household waste (paper, plastic, glass, vegetable waste, other flammable substances) the risk of fire occurring and developing inside the warehouse is high. This fire can be based on several origins: anthropogenic, microbial, natural. Thus, the temperature released may damage the component layers of the landfill. Inside the warehouse gases, CO2, CH 4 , as well as volatile organic compounds (VOCs) are born due to the activity of microorganisms.

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