STABILITY ASSESSMENT OF THE FINAL SLOPES OF THE NORTH PESTEANA QUARRY IN THE CONTEXT OF LONG TERM SAFETY OF OBJECTIVES IN THE INFLUENCE AREAS PUBLISHEDIzabela-Maria, APOSTU, Florin, FAUR None email@example.com
The problem of slope's instability has always been a concern for scientists. The superficial or deep landslides, are manifested in the conditions of an imbalance occurring at the level of the rock masses or the engineering constructions due to the influence of many internal or external factors, which causes the worsening of the quality of the geotechnical characteristics of the rocks. The disastrous effects of landslides have highlighted the importance of deepening the studies in order to understand the way of manifestation and the causes of the loss of stability, respectively the implementation of rational measures to increase stability. The causes of landslides include: the presence of overloads, precipitation, groundwater and surface water, alteration of rocks, vibrations, seismic shocks, etc. In most cases, the occurrence of negative geotechnical phenomena occurs as a result of the influence of a cumulus of factors whose action is manifested over time. This paper aims at assessing the stability of the final slopes of the North Pesteana quarry. Knowing the hydrogeological structures characteristic of the site and the history of the sewatering works, the problem of the stability of the final slopes is raised after the mining activity ceases, which also means the stopping of the dewatering systems. The inflow of water which, according to current studies, will contribute to the restoration of the aquifer resources and to the flooding of the gap, will have a major negative influence because it involves the increasing of the humidity of the rocks, thus causing the worsening of their strength characteristics and the significant reduction of the stability reserve, the action of water being one of the most influential causes of landslides. A major problem is that the objectives in the area are at relatively small distances from the mining perimeter. Under these circumstances, it is important to assess the stability of the definitive slopes, to apply the measures to increase the stability reserve, also taking into account a safety margin, in order to minimize the risk of sliding is, given the long service life of the final slopes (for decades) and the influence of external or internal factors.
quarry, remaining gap, final slope, stability, safety