Large scale failure of the external waste dump at the “South Field” lignite mine, Northern Greece

Steiakakis, E.; Kavouridis, K.; Monopolis, D.

doi:10.1016/j.enggeo.2008.11.008

Cited by 79 publications

(43 citation statements)

References 6 publications

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“…Waste dump instability and failure (Richards et al 1981;Stead and Singh 1989;Speck et al 1993;Singh and Kant 2007;Steiakakis et al 2009;; Silva and DaBoit 2010) 2. Spontaneous combustion and subsequent deleterious emissions to the atmosphere Zhao et al 2008; 3.…”

Section: Introductionmentioning

confidence: 97%

Leaching of potential hazardous elements of coal cleaning rejects

Silva

Izquierdo

Querol

et al. 2010

Environ Monit Assess

107

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The geochemical characteristics of coal cleaning rejects (CCR) in Santa Catarina State, Brazil, were investigated. Around 3.5 million ton/year of coal waste are dumped in Santa Catarina State. Coal beneficiation by froth flotation results in large amounts of CCR composed of coaly and mineral matter, the latter characterised by the occurrence of sulphide minerals and a broad array of leachable elements. The total and leachable contents of more than 60 elements were analysed. Atmospheric exposure promotes sulphide oxidation that releases substantial sulphate loads as well as Ca2+, K+, Mg2+, Cl- and Al3+. The metals with the most severe discharges were Zn, Cu, Mn, Co, Ni and Cd. Most trace pollutants in the CCR displayed a marked pH-dependent solubility, being immobile in near-neutral samples. The results highlight the complex interactions among mineral matter solubility, pH and the leaching of potentially hazardous elements.

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Section: Introductionmentioning

confidence: 97%

Leaching of potential hazardous elements of coal cleaning rejects

Silva

Izquierdo

Querol

et al. 2010

Environ Monit Assess

107

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“…Similar disasters, both in terms of size and impact took place in open-pit mines in many countries, including Germany and Greece [3], [4]. These flows had some distinctive characteristics different from the widely documented landslides.…”

Section: Introductionmentioning

confidence: 95%

What Were the Reasons for the Rapid Landslide Occurrence in “Piaseczno” Open Pit? – Analysis of the Landslide Process

Jakóbczyk

Cała

Stopkowicz

2015

Studia Geotechnica Et Mechanica

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Landslides are major natural hazards occurring in opencast mining. The problem of slope stability failure in the existing open pit mines as well as in those which are at a stage of technical closure is current issue in Poland and all over the world. This problem requires conducting in-depth and meaningful analysis which will identify the causes of processes characterized by a very rapid course and large extent.The paper presents the analysis of the landslide causes, which took place on May 11, 2011 on the western slope of the internal dump in "Piaseczno" sulphur mine (at a stage of technical closure). It was the first native sulphur open pit mine in Poland in which the exploitation was carried out from 1958 untill 1971. Reclamation works have been ongoing since 2005. The aim of these works is to create water body which will be used for recreational purposes. During the reclamation works on the western slope of "Piaseczno" reservoir the landslide processes were activated. A detailed description of geology and preliminary analyses of landslide processes are given in [1]. The development of landslide took place in a very violent manner. Moreover, the occurrence of the landslide caused the movement of the reservoir shoreline by about 350 meters and created a bay with the area of approximately 6 hectares. Displacement of 600 000 m 3 of soil masses under the water resulted in its level rising by 56 cm. The total volume of ground masses was over 1 million m 3 .The analysis of the landslide process activation was carried out for two representative cross-sections of the internal dump. Numerical calculations were performed using the Limit Equilibrium Method (SLOPE/W GeoStudio) and the Finite Difference Method using the Shear Strength Reduction Method (FLAC Slope). They were aimed at determining the shape and extent of potential slip surface, which would correspond to the observed landslide. The purpose of the analysis, the results of which are presented in the article, was to define how the process proceeded and what factors contributed to its activation.

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“…Certain engineering-geological and geotechnical aspects of coal tailings have been discussed by Ulusay and Aksoy (1994), Ulusay et al (1995), Dawson et al (1998), Kasmer and Ulusay (2006), Steiakakis et al (2009), Kowalska et al (2012, etc. However, this was under different boundary conditions than in this case study presented herein.…”

Section: Introductionmentioning

confidence: 97%

Monitoring and analysis of burning in coal tailing dumps: a case study from the Czech Republic

et al. 2014

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The tailings are significant geological environments in mining and industrial regions. They represent special engineering-geological zones of anthropogenic sediments that require specific engineering-geological investigation. In particular, it is important to examine the sites in detail with regard to their potential heterogeneity. The article deals with an important engineering-geological issue of burning in coal mine and coal tailing dumps. A case study was implemented in a tailing dump in Heřma-nice located in Ostrava which is a major industrial city of the Czech Republic. In this urban agglomeration, anthropogenic sediments form 20 % of all foundation soils. Thermometric monitoring in Heřmanice detected a thermally active coal tailing dump with burning as deep as 9 m. The burning is predominantly related to the content of oxygen in the body of the tailing. It belongs to the limiting conditions of the pyrophoric and consequently self-sustained burning. Other factors are sufficient contents and quality of coal mass and capacity to accumulate thermal energy of exothermal reactions. Dynamics of changes in the burning processes were identified in dependence on time, depth and distribution. There was a considerable heterogeneity of thermal activity as for all parameters, and changes were observed from the point of view of time. Considering the depth, burning gradually spread deeper. However, in the depth of 12 m, no significant thermal activity was observed within the overall studied locality. It may be stated that thermal activity is observed as much as 40 % of the studied area. Directionally, there was a progression of the process from west to east. The identified facts may be applied in final designed levels of coal tailing dumps where observational experiences identified intense cooling up to the height of 5 m preventing higher stages of self-ignition process (best situation). Tailing dumps from 5 to 12 m may already be thermally active (meeting other boundary conditions), and in tailing dumps over 12 m, it is clear that there is no thermal activity below 12 m.

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Large scale failure of the external waste dump at the “South Field” lignite mine, Northern Greece

Cited by 79 publications

References 6 publications

Leaching of potential hazardous elements of coal cleaning rejects

Leaching of potential hazardous elements of coal cleaning rejects

What Were the Reasons for the Rapid Landslide Occurrence in “Piaseczno” Open Pit? – Analysis of the Landslide Process

Monitoring and analysis of burning in coal tailing dumps: a case study from the Czech Republic

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