| Abstrakt: |
Alunu lignite open pit, part of Berbești Mining Basin (Vâlcea County), is located in a hilly area, whose morphology, structure as well as the geological and tectonic conditions favor the periodic triggering (especially in periods characterized by heavy rainfall) of landslides, variable in size, volume of material involved and velocity. Obviously, on this natural background that favors the formation of landslides, in areas where human activity affects the integrity of existing geological formations, (in this case in areas of open pit mining of lignite deposits) the occurrence risk of such phenomena is amplified. Thus, in conditions of rainfall amounts well above the multiannual averages in a relatively short period of time (high intensity rainfall), on 23.05.2019, in the perimeter of Alunu open pit there was a large landslide, judging by the volume of rocks involved. The landslide had a violent character and a rapid extension in the upper steps and on the slope. The phenomenon began with local subsidence in the structure of the rocks in the slope, which were followed by the actual landslide. In this context, this paper analyzes the conditions and causes that led to the landslide, focusing on the influence of excessive rainfall in the area in the period preceding the event. [ABSTRACT FROM AUTHOR] |
