Proceedings of the conference on Recent Advances in Rock Engineering (RARE 2016)

Design of embankment for safe back filling in opencast mines – A case study

Authors
Behera Santosh Kumar, C.N. Ghosh, P.K. Mandal
Corresponding Author
Behera Santosh Kumar
Available Online November 2016.
DOI
https://doi.org/10.2991/rare-16.2016.32How to use a DOI?
Keywords
Back Fill; Coal ash; Embankment; Downstream; PLAXIS-3D
Abstract
Disposal of coal ash generated by thermal power plants is a challenge now days under rigid environmental norms. The conventional method of disposing in ash ponds leads to requirement of huge amount of valuable land and it have adverse effect on air, ground water and soil. Hence, the need of the hour is to utilize this ash in an environment friendly manner. In this paper a technical option for safe back filling practices by constructing embankment in the de-coaled area is discussed. This paper throws a light on the scheme for utilizing coal ash in combination with overburden (O/B) material as a filling material in abandoned portion of the mine. The filling work is carried out by design of embankment to contain it against the high wall. Out of several methods of embankment construction, downstream method of embankment method is used.To design embankment safely numerical simulation was carried out by using PLAXIS-3D which is based on Finite Element Method. The construction scheme involves raising of embankment with slope angle of 270in eight stages of ten meters height each and simultaneously filling it with high concentration ash in layers. The material used for embankment construction was coal ash and OB. In the final stage, the top soil of 5m thick is proposed to be spread for re-vegetation
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Proceedings
Recent Advances in Rock Engineering (RARE 2016)
Part of series
Advances in Engineering Research
Publication Date
November 2016
ISBN
978-94-6252-260-2
ISSN
2352-5401
DOI
https://doi.org/10.2991/rare-16.2016.32How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - Behera Santosh Kumar
AU  - C.N. Ghosh
AU  - P.K. Mandal
PY  - 2016/11
DA  - 2016/11
TI  - Design of embankment for safe back filling in opencast mines – A case study
BT  - Recent Advances in Rock Engineering (RARE 2016)
PB  - Atlantis Press
SN  - 2352-5401
UR  - https://doi.org/10.2991/rare-16.2016.32
DO  - https://doi.org/10.2991/rare-16.2016.32
ID  - SantoshKumar2016/11
ER  -