Earthquake response of external mine overburden dumps: a micromechanical approach

Koner, Radhakanta; Chakravarty, Debashish

doi:10.1007/s11069-010-9602-x

Cited by 10 publications

(3 citation statements)

References 19 publications

(15 reference statements)

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“…It anticipates sliding tendencies, identifies the failure surface, and pinpoints the initiation of failure. DEM presents an innovative approach that surpasses FEM and FDM in the analysis of overburden dumps 7 . The Finite Element Method offers greater accuracy compared to the Limit Equilibrium Method 27 .…”

Section: Shear Strengthmentioning

confidence: 99%

“…The correlation between dump height and the slope angle is established by considering diverse index properties of both the dump material and the underlying foundation soil 6 . Proposed are connections between the Factor of Safety (FOS) and dump height, as well as between FOS and slope angle 7 . The stability of the dump slope is analyzed with regard to the influence of height increase, along with the introduction of additional bench formations 2 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stability Analysis of Overburden Dump Slope of Coal/ Mineral Mines: A Review

Geete,

Singh,

Singh

et al. 2023

jmmf

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Open-pit mining generates vast quantities of overburden waste material, which is piled up in the form of overburden dumps. Ensuring the stability of these dump slopes is a primary concern for the open-cast mining industry. Stability analysis is employed as a technique to calculate the factor of safety for these overburden dump slopes. This analysis relies on both the geometric and geotechnical characteristics of the dump. The stability of the slope is influenced by key factors such as bench height, bench width, and the number of benches. Factors such as pore pressure, permeability, degree of saturation, moisture content, and rainfall levels can induce instability in these overburden dump slopes. The shear strength of the material constituting the slope depends on both cohesion and the internal angle of friction. Since overburden dumps are composed of a heterogeneous mix of clay, silt, and rock fragments, employing small-scale direct shear tests or triaxial shear test setups might lead to underestimated or overestimated shear strength values for the dump material. To comprehend the heterogeneity of the overburden dump material, various sieve analysis techniques are utilized. The limit equilibrium method serves as the foundational approach for slope stability analysis. Additionally, probabilistic failure analysis and numerical analysis techniques such as the shear strength reduction method offer robust tools for assessing potential failure scenarios and determining critical factors of safety.

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Section: Shear Strengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stability Analysis of Overburden Dump Slope of Coal/ Mineral Mines: A Review

Geete,

Singh,

Singh

et al. 2023

jmmf

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“…The height of the dump is increasing continuously as the mining goes deeper and deeper to fulfil the demand. This resulted in the mine dump being highly hazardous (Koner and Chakravarty, 2010). Failure of these slopes increases the risk in terms of damage to machinery and, sometimes, loss of life and property.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of dump slope stability using material properties obtained by parallel gradation method

Rudra,

Gadepaka,

Rai

et al. 2024

Mining Technology: Transactions of the Institutions of Mining a

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The stability of the dump slope depends on many parameters, mainly the shear strength of the dump material. Obtaining strength parameters of dump material is vital in dump stability analysis. Dump material consisting of particles of varying sizes, as large as 1000 mm, is typical. It is challenging to obtain the material strength properties of such large particles in the laboratory. Extrapolation of the material strength properties of the modelled samples prepared by parallel gradation technique is used to calculate the dump material strength properties in this study. A closer agreement is found between the predicted and calculated values of the angle of internal friction. Numerical modelling has been carried out with the obtained material properties using RS2 V9.0, a finite element package, to analyse the stability of a dump slope. It is observed from the results that FOS (factor of safety) increase with an increase in dmax (maximum particle size), keeping the shape of the PSD (particle size distribution) curve constant. The paper develops a slope stability analysis methodology considering particle size's effect on slope stability. The proposed method can be used for accuracy and reliable results for slope stability analysis.

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