Abstract
Increasing stripping ratios in surface mines have led to the removal and movement of huge volumes of overburden that is generally stored in form of internal or external dump within the mine boundaries. For safe storage in limited areas, the overburden dumps are stabilized using several popular methods. One of the recent economic and environmentally safe techniques is the stabilization of dumps using fly ash composite material. This study analyzes the sensitivity of the overall stability of the dump slope on its geometrical and material properties, when stabilized using fly ash composite. Four different geometric parameters and six material properties were varied in simulated dump models to find the sensitivity of the factor of safety (FOS) using limit equilibrium (LEM) and finite element methods (FEM). The sensitivity analysis was also carried out for minimum thickness of fly ash composite layers required for better stabilization of dump slopes. From the study, it was observed that FOS of the dump slope was most sensitive to the material properties of overburden, apart from the slope angle, dump height, number of fly ash layers, and cohesion of fly ash composite (Sensitivity Index (SI) > 0.2), while it was less sensitive to other geometrical parameters and material properties. The critical composite layer thickness was found to be most sensitive to all the geometrical parameters, but very less sensitive to the material parameters (SI < 0.1). These sensitivities give a clear idea of the criticality of various parameters for a stable dump slope design.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
GOI_PCS: Provisional Coal Statistics 16–17, C. C. s. Organisation (Editor), Ministry of Coal, Government of India, Kolkata (2017)
Fuginski, Z.: Underground Coal Mining—Global Picture and Brief Overview. Colombai Clean Power, Colombai (2012)
MOC: Annual Report 2016–17. Annual Report, M. o. Coal (Editor), Ministry of Coal, Government of India, New Delhi (2017)
Sehgal, A., Tongia, R.: Coal Requirement in 2020: A Bottom-Up Analysis (2016)
IEA: Coal Information 2017. Coal Information, I. E. Agency (Editor), International Energy Agency (2017)
AEU: Australian Energy Update 2017. Australian Energy Update, E. S. a. A. Section (Editor), Department of Environment and Energy, Australian Government, Canberra (2017)
MSOPI: Energy Statistics 2017. Energy Statistics, C. S. Office (Editor), Ministry of Statistics and Programme Implementation, Government of India, New Delhi (2017)
Da Gama, C.D.: Easy profit maximization method for open-pit mining. J. Rock Mech. Geotech. Eng. 5, 350–353 (2013)
Falkie, T.V., Porter, E.: Economic surface mining of multiple seams. In: Application of Computer Methods in the Mineral Industry Proceeding (1973)
Ziling, S., Yundong, M.: A new method to confirm the economic and reasonable stripping ratio of surface coal mine. In: Second International Conference on Computational Intelligence and Natural Computing (CINC) IEEE, pp. 47–52 (2010)
Bowman, P., Gilchrist, H.: Waste dump instability and its operational impact for a canadian plains lignite mine. In: Proceedings of the International Symposium on Stability in Coal Mining, pp. 381–394. Vancouver, British Colombia, Canada (1978)
Kainthola, A., Verma, D., Gupte, S., Singh, T.: A coal mine dump stability analysis—a case study. Geomaterials 1 (2011)
Rai, R., Kalita, S., Gupta, T., Shrivastva, B.: Sensitivity analysis of internal dragline dump stability: finite element analysis. Geotech. Geol. Eng. 30(6), 1397–1404 (2012)
GOI: Update on ECL Rajmahal Coal Mine Accident. M. o. C. Government of India (Editor) (2016) http://pib.nic.in
Lersow, M.: Deep soil compaction as a method of ground improvement and to stabilization of wastes and slopes with danger of liquefaction, determining the modulus of deformation and shear strength parameters of loose rock. Waste Manag 21, 161–174 (2001)
Clegg, B.: Kneading Compaction. Aust. Road Res. (1964)
Olufowobj, I., Ogundoju, A., Michael, B., Aderinlewo, O.: Clay soil stabilisation using powdered glass. J. Eng. Sci. Technol. 9(5), 541–558 (2014)
Li, Q., Li, Y., Dasgupta, G., Song, D., Qiao, L., Wang, L., Dong, J.: Analysis of the blasting compaction on gravel soil. J. Chem. 2015, 1–9 (2015)
Geosimpro: Static Weight Compaction (2017)
Maaitah, O.N.: Soil stabilization by chemical agent. Geotech. Geol. Eng. 30(6), 1345–1356 (2012)
Onyejekwe, S., Ghataora, G.S.: Soil stabilization using proprietary liquid chemical stabilizers: sulphonated oil and a polymer. Bull. Eng. Geol. Env. 74(2), 651–665 (2014)
Hamzah, H.N., Al Bakri Abdullah, M.M., Yong, H.C., Zainol, M.R.R.A., Hussin, K.: Review of soil stabilization techniques: geopolymerization method one of the new technique. Key Eng. Mater. 660, 298–304 (2015)
Karatai, T.R., Kaluli, J.W., Kabubo, C., Thiong’o, G.: Soil stabilization using rice husk ash and natural lime as an alternative to cutting and filling in road construction. J. Constr. Eng. Manage. 04016127 (2016)
Nguyen, L.: Fibre Reinforced Clay. U. r. g. u. s. a. Carpeting (Editor), CRICOS, UTS Newsroom (2014)
Calderwood, T.: Why is hydroseeding better than traditional methods of growing lawns. RadioYu (2016)
Shahram, P., Afshin, A., Bujang, B.K.H., Nuno, C., Fasihnikoutalab, M.H.: Application of alkali-activated agro-waste reinforced with wollastonite fibers in soil stabilization. J. Mater. Civil Eng. 29(2) (2017)
Gupta, T., Yellishetty, M., Singh,T.: Optimization of Ash Content in Overburden Dumps: A Numerical Approach, pp. 997–1004. Mine Planning and Equipment selection (MPES-2015), The South African Institute of Mining and Metallurgy (2015)
Gupta, T., Singh, T.: Geo-hydrological stability analysis of fly ash stabilised overburden dump slopes in opencast coal mines using finite element analysis. Int. J. Adv. Sci. Eng. Info. Technol. 8(2), 405–410 (2018)
Gupta, T.: Fly Ash Utilisation in Haul Road Construction in Open Cast Coal Mines: A Geo-Environmental and Hydrogeological Investigation, vol. 211. Department of Earth Sciences (IITB), Department of Civil Engineering (Monash University) PhD, Indian Institute of Technology Bombay, IIT Bombay (2018)
Niranjan and Radhakrishnan: An experimental investigation on fal-g paste. Int. Adv. Res. J. Sci. Eng. Technol. 2(3), 41–49 (2015)
Gupta, T., Rai, R., Jaiswal, A., Shrivastva, B.: Sensitivity analysis of coal rib stability for internal mine dump in opencast mine by finite element modelling. Geotech. Geol. Eng. 32(3), 705–712 (2014)
Lenhart, T., Eckhardt, K., Fohrer, N., Frede, H.-G.: Comparison of two different approaches of sensitivity analysis. Phys. Chem. Earth, Parts A/B/C 27(9–10), 645–654 (2002)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Springer Nature Switzerland AG
About this paper
Cite this paper
Gupta, T., Jamal, M., Yellishetty, M., Singh, T.N. (2019). Sensitivity Analysis of Mechanical and Geometrical Properties of Fly Ash Stabilized Overburden Dumps Using Mathematical Simulations. In: Widzyk-Capehart, E., Hekmat, A., Singhal, R. (eds) Proceedings of the 27th International Symposium on Mine Planning and Equipment Selection - MPES 2018. Springer, Cham. https://doi.org/10.1007/978-3-319-99220-4_29
Download citation
DOI: https://doi.org/10.1007/978-3-319-99220-4_29
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-99219-8
Online ISBN: 978-3-319-99220-4
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)