Stability analysis of mine overburden dump stabilized with fly ash

Rajak, Tarun Kumar; Yadu, Laxmikant; Chouksey, Sandeep Kumar; Dewangan, Pankaj Kumar

doi:10.1080/19386362.2018.1503780

Cited by 23 publications

(12 citation statements)

References 33 publications

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“…The reduction of 10-12% in unit weight was found in case of OB materials mixed with 20-25% fly ash by volume. The reduction in unit weight of fly ash-OB mix was due to the lower specific gravity of fly ash [59]. The mobilized shear strength of the coal mine OB material increases with 20-25% fly ash at moisture content below the optimum moisture content (OMC) due to the increase in frictional component.…”

Section: Integration Of Fly Ash With Ob Dump Materialsmentioning

confidence: 99%

“…Rajak et al [62] has performed the stability analysis for pond ash mixed coal mine OB dump and suggested that pond ash may be safely utilized in the dump with higher stability. Numerical modelling was carried out by Rajak et al [59] and suggested that optimum dump height of 50.0 m and 55.0 m can be suitably adopted for OB dump mixed with 10% fly ash at 35° and 37° slope angle respectively. It was reported that with the addition of fly ash in OB material, FoS value increases and shear strain rate decreases which make the dump more stable.…”

Section: Integration Of Fly Ash With Ob Dump Materialsmentioning

confidence: 99%

“…It was reported that with the addition of fly ash in OB material, FoS value increases and shear strain rate decreases which make the dump more stable. Integration of fly ash with OB material helps to decrease the shear strain rate and velocity vector which makes fly ash to get utilized in OB dump [59,61].…”

Section: Integration Of Fly Ash With Ob Dump Materialsmentioning

confidence: 99%

“…The increase in the percentage of fly ash (Class F) decreases the Maximum Dry Density (MDD) and increases the optimum moisture content. The decrease in the MDD of fly ash treated materials may be attributed to the lower specific gravity or lower density of the fly ash and also due to the immediate formation of cemented products [59].…”

Section: Compaction Characteristicsmentioning

confidence: 99%

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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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Section: Integration Of Fly Ash With Ob Dump Materialsmentioning

confidence: 99%

Section: Integration Of Fly Ash With Ob Dump Materialsmentioning

confidence: 99%

Section: Integration Of Fly Ash With Ob Dump Materialsmentioning

confidence: 99%

Section: Compaction Characteristicsmentioning

confidence: 99%

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

2020

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“…Apart from experimental work numerical modeling has been addressed by various researchers to understand the stability issues of embankment in terms of factor of safety. In this direction, the optimization of slope angle and their stability issues with the various proportion of y ash mixed with soil are also addressed by various authors (Martin et al 1991;Pradhan et al 2014;Rajak et al 2017Rajak et al , 2018Rajak et al , 2019Turkane and Chouksey 2021).…”

Section: Introductionmentioning

confidence: 99%

Fly ash application in moorum embankment and its stability analysis using FLAC/SLOPE and Response Surface Method

Turkane

Chouksey

2021

Preprint

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This paper presents the application of fly ash in moorum embankment by partial replacement of moorum with fly ash and its stability analysis has been carried out. An experimental investigation was carried out on moorum blended with fly ash at different proportions of fly ash by dry weight of soil for the moorum embankment stability analysis. The Index properties and strength properties were assessed by performing Atterberg's limit, specific gravity, grain size distribution, compaction test, direct shear test (DST), and California Bearing Ratio (CBR) test respectively. The embankment slope stability analysis was performed using FLAC/SLOPE version 8.10 (Fast Lagrangian Analysis of Continua) software at a various slope angle of 30°, 32°, and 34° and different heights of the embankment of 6 m, 8 m, and 10 m to calculate Factor of Safety (FOS). FOS decreases with the increment of fly ash content, the height of embankment, and slope angle respectively. In addition to the numerical analysis, Response Surface Methodology (RSM) based (Face-Centered Central Composite Design) was used to predict FOS. The developed mathematical equation illustrates that the RSM model was statistically significant and the results give a reliable prediction of FOS.

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Micro-crumbled Rubber Powder as an Additive to Improve Geotechnical Properties and Slope Stability

Vindhuja,

Swathy

2024

Lecture Notes in Civil Engineering

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Stability analysis of mine overburden dump stabilized with fly ash

Cited by 23 publications

References 33 publications

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

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

Fly ash application in moorum embankment and its stability analysis using FLAC/SLOPE and Response Surface Method

Micro-crumbled Rubber Powder as an Additive to Improve Geotechnical Properties and Slope Stability

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