Landslides Occurred in Bujorascu Valley Dump and Stability Improvement Solutions

Abstract

This paper presents some results of the researches regarding the landslides produced in the rock dump Bujorăscu Valley, administrated by National Society of Lignite Oltenia. The paper analyses the geotechnical characteristics of the rocks and water influence on them. It was found that, as a result of water infiltration in the waste dump's body, rocks resistance is considerably reduced and appears areas with high plasticity and sliding surfaces. From the statistic data processing there were established the values of the internal friction angle which makes the dump stable. In the end of the paper work are presented solutions for increasing the dumps stability and for ecological rehabilitation of the areas affected by landslides.

The risk of landslide occurrence in the waste dump belonging to the Ruget quarry and measures to combat it

“…This software analyses the stability of natural and artificial slopes of any geometry, both under static and seismic conditions, as well as in the presence of pore water in the deposited rocks or on the dump's slopes. The problem of the dump's stability is considered bidimensional and is associated with a plain strain conditions along the surface [1]. Also is accepted the hypothesis that the braking is instantaneous along the sliding surface (for most of the waste dumps from Oltenia the surface is circular).…”

“…Signification of notations in formulas: Although Fellenius method neglects the forces that occur between the strips, is the simplest method of determining the coefficient of stability. This method leads to reduced values for the stability coefficient and is not recommended for slopes with small inclination and high water pressure [1,3].…”

“…The program calculates the stability coefficients automatically, using the Fellenius, Janbu and Bishop methods for this purpose. Finally, it determines the critical slip surface, which corresponds to the minimum coefficient of stability [1,3]. Laboratory analysis performed on rock samples collected from the study area revealed the values presented in Table 1.…”

“…Instability phenomena may occur either because the designed geometry or the construction technology is not respected, or due to the action of external factors (overloads, precipitations, seismic shocks etc.) and they are responsible of generating risks for workers, mining equipments, as well as for the environmental components in the area of influence of the dump [1][2].…”

Research Concerning the Possibility of Turning Sterile Soil Into a Fruitful One, by Using Sludge

“…The sterile dumps in the Jiu Valley [2][3][4], Hunedoara County, Romania were born by depositing the sterile material resulting from the preparation of coal [2]. The deposited material consists of rocky clayey rocks, marl, coal shale and sandstone [5]. The granulometric state of the material is very different, from millimetre to rock * email: cdipentrucdi@yahoo.com; ioana.ionel@upt.ro fragments of centimetres or even tens of centimetres for mine tailings [3].…”