Study regarding the stability and the risk of landslides of the marginal slopes of Lake UNEX (Petrila, Romania)

Often, in areas where open pits were developed, after the cessation of productive activities, lakes, with different characteristics (morphological, geometric and related to the quality of the accumulated waters), were formed in the remaining voids. After the restitution of the lands occupied by these open pits to the former owners or local authorities, one of the options considered for their use is that of development for recreational purposes. In this sense, one of the investigations of utmost importance, regardless of the recreational infrastructures intended to be built on the site, is the one that takes into account the stability of the marginal slopes and the assessment of the risk of landslides. In this context, in the content of this paper, the geotechnical investigations carried out for Lake UNEX, located on the administrative territory of the city of Petrila (Romania), are briefly presented, as well as a series of constructive measures intended to increase the stability reserve and ensure the protection of future recreational objectives located in the risk area.