American Journal of Mining and Metallurgy
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American Journal of Mining and Metallurgy. 2014, 2(1), 1-7
DOI: 10.12691/ajmm-2-1-1
Open AccessArticle

Optimisation of Dump Slope Geometry Vis-à-vis Flyash Utilisation Using Numerical Simulation

S.P. Pradhan1, , V. Vishal2, T. N. Singh1 and V.K. Singh2

1Department of Earth Sciences, Indian Institute of Technology Bombay, Mumbai, India

2Mine Fire Division, CSIR-Central Institute of Mine and Fuel Research, Dhanbad, India

Pub. Date: March 31, 2014

Cite this paper:
S.P. Pradhan, V. Vishal, T. N. Singh and V.K. Singh. Optimisation of Dump Slope Geometry Vis-à-vis Flyash Utilisation Using Numerical Simulation. American Journal of Mining and Metallurgy. 2014; 2(1):1-7. doi: 10.12691/ajmm-2-1-1

Abstract

Stability of waste dump is now gaining importance due to increasing depth and size of mine. Management of dump nearby mining areas is one of the most critical and crucial task for mine management due to limited land and other governing laws related to environment and forest conservation. In this paper, a study was conducted to establish the effect of slope angle on the stability of waste dump for accommodation of flyash is carried out. Based on numerical simulation, it was found that the dump slope of 60 m height with 36° slope can be critically stable with 20% flyash randomly mixed with overburden materials whereas flatter slopes provide higher factor of safety. Keeping other parameters constant, the optimum slope of 32° is the best possible to accommodate the mine dump for its long term stability. These findings were further supported by study of maximum velocity vectors and shear strain rates in every case and the extent of damage zone due to tensile pull. It is hoped that this technical note will find utility wherever a design of dump of chosen material type is being planned where the wastes can be managed alongside ulitisation of flyash.

Keywords:
dump dump slope factor of safety (FoS) finite difference method (FDM) FLAC/Slope

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