Sensitivity Analysis of Internal Dragline Dump stability: Finite Element Analysis

Rai, Rakesh; Kalita, Sanjeeb; Gupta, T. K.; Shrivastva, B. K.

doi:10.1007/s10706-012-9541-2

Cited by 29 publications

(13 citation statements)

References 12 publications

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“…Moreover, time-dependent and strain-rate processes are usually present in spoil heaps due to continuous variations in the loading states and the geometric boundary conditions during the heap construction period (Holubec 1976). Load hysteresis and strain-hardening phenomena accompanied by high nonlinearity in small strain domains have also been associated with the spoil material (Rai et al 2012). The uneven and sometimes unknown deposition processes, as well as lack of compaction effort during the placement of the spoils, lead to further complexities and uncertainties in relation to the behaviour of spoil dumps (Zevgolis 2018).…”

Section: Methods Of Slope Stability Analysismentioning

confidence: 99%

Stability and characterisation of spoil heaps in European surface lignite mines: a state-of-the-art review in light of new data

et al. 2019

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The large amount of spoil material produced during the mining process imposes a significant economic and environmental liability on lignite producers. In this context, the present paper provides an overview of the geotechnical characteristics of European lignite mine spoil heaps and discusses their significance to the stability of the heaps. In order to achieve this, samples collected from spoil heaps of Polish, Czech and Greek mines are analysed and the results are compiled with data from the literature. A major conclusion drawn is that both physical and engineering properties of spoil heaps indicate a noteworthy variability, which is larger than typical in situ ground material. This is because of the additional factors affecting spoil heap deposition, such as the transportation and dumping method. Furthermore, failure mechanisms and case histories of large instabilities in lignite spoil heaps are critically discussed in order to better understand triggering failure mechanisms. It is concluded that classical assumptions made for natural soil slopes and relevant limit equilibrium models should be cautiously applied to spoil heaps. The challenges associated with numerical and probabilistic modelling of spoil heap stability, such as the inherent spatial variability of spoils and the time-dependent changes in their geotechnical properties, are also critically discussed. Finally, important research gaps in design and analysis of spoil heap stability, such as the absence of appropriate constitutive models developed specifically for spoil materials, are summarised.

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Section: Methods Of Slope Stability Analysismentioning

confidence: 99%

Stability and characterisation of spoil heaps in European surface lignite mines: a state-of-the-art review in light of new data

et al. 2019

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“…Flattening of slope increases the stability of the OB dump however it decreases the dump capacity and requires larger area. Revegetation is one of the popular methods adopted for increasing dump stability, mine reclamation, ecological restoration and healthy environment [10][11][12][13][14][15][16]. Tripathi et al [17] studied the long-term stability dump stability and soil fertility of a coal mine spoil in Indian dry tropical environment and suggested that revegetation on the mine dump enhances the root biomass value, mineral Nitrogen and Microbial Biomass Nitrogen (MBN) value.…”

Section: Stability Of the Ob Dumpmentioning

confidence: 99%

Effect of fly ash on geotechnical properties and stability of coal mine overburden dump: an overview

2020

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The management of overburden (OB) materials needs proper attention to safe mining operations. Several mine OB dump failures have been occurred due to inappropriate geotechnical and geometrical parameters. Increasing consumption of coal in thermal power plant also generates huge amount of ash which adversely affect the environment and its utilization is a great challenge. The present paper reviews the effect of fly ash on the different geotechnical properties and stability of coal mine OB dump material to explore a safe and effective utilization of fly ash. It was found that up to 30% fly ash can potentially modify the compaction characteristics, California bearing ratio value, unconfined compressive strength, and shear strength parameters of OB dump material. Based on the review, it may be suggested that fly ash-OB mix can be effectively utilized in the mine OB dump and for the mine haul road construction thus, provides an alternative mode of fly ash utilization in huge quantity.

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“…Though the dimensions of these dumps are usually regulated by local mining legislation, the size of dumps dictates a major part of mine economics, as even a small degree of change in slope angle can lead to huge cost savings. However, failure of these dumps can cause huge loss of life and property as is seen in various recent and past reported cases [2]- [4]. Hence it is a vital requirement for a surface mining operation to make safer and stable dump slopes.…”

Section: Introductionmentioning

confidence: 99%

“…One of the prime avenues of safety in a mining operation is the stability of the overburden dumps. Due to the limitation of available land space and the huge amounts of overburden that is removed in an average surface mining operation, there is always a requirement to make higher and steeper overburden dumps to accommodate increasingly more material in given land area [2]. Though the dimensions of these dumps are usually regulated by local mining legislation, the size of dumps dictates a major part of mine economics, as even a small degree of change in slope angle can lead to huge cost savings.…”

Section: Introductionmentioning

confidence: 99%

Geo-hydrological Stability Analysis of Fly Ash Stabilised Overburden Dump Slopes in Opencast Coal Mines Using Finite Element Analysis

Gupta¹,

Singh²

2018

International Journal on Advanced Science, Engineering and Information Technology

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Fly ash is one of the major waste line products in coal power sector and simultaneously one of the most desirable products in the construction industry, due to its pozzolanic nature. This has resulted in fly ash being used as a partial replacement of cement and in various composites, for civil and mining industries. Recent studies and applications have shown the viability of fly ash as an economical and eco-friendly stabiliser for dump slopes in opencast mines. Apart from the analysis of structural stability due to the pozzolanic binding nature of fly ash, it is also important to study the hydrological aspects of dump slopes in conjugation with the fly ash stabiliser. This study performs the numerical simulation for the dump slopes using finite element analysis (FEA) for studying the effect of fly ash stabilisation layer on water movement and associated hydrological investigation. The effect of water head build-up (due to fly ash stabilisation layer) on the overall stability of dump slope is analysed and compared to give an estimate for the increase in a factor of safety of slope and a viable dimensional increase of slope geometry. It is seen that fly ash layer stabilisation is effective even in the saturated state of overburden dumps, with the factor of safety increasing from 1.09 to 1.32. Proper drainage channels are found to be essential to prevent any excess stress build-up due to the low permeability of fly ash layers.

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Sensitivity Analysis of Internal Dragline Dump stability: Finite Element Analysis

Cited by 29 publications

References 12 publications

Stability and characterisation of spoil heaps in European surface lignite mines: a state-of-the-art review in light of new data

Stability and characterisation of spoil heaps in European surface lignite mines: a state-of-the-art review in light of new data

Effect of fly ash on geotechnical properties and stability of coal mine overburden dump: an overview

Geo-hydrological Stability Analysis of Fly Ash Stabilised Overburden Dump Slopes in Opencast Coal Mines Using Finite Element Analysis

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