Proceedings of the Rocscience International Conference (RIC 2023)

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Slope Stability Analysis for Optimisation of Overburden Dump Capacity in Opencast Coal Mines

Authors
Sravan Kumar Gara1, *, Nirbhay Narayan Singh2, 3, Randip Singh1, K. S. Rao2
1CMPDI, Ranchi, India
2IIT, Delhi, New Delhi, India
3CWPRS, Pune, India
*Corresponding author. Email: sk.gara@coalindia.in
Corresponding Author
Sravan Kumar Gara
Available Online 8 November 2023.
DOI
10.2991/978-94-6463-258-3_11How to use a DOI?
Keywords
Large Direct Shear Box; Over Burden Dumps; Slope Stability; Slide2; GALENA
Abstract

Slope stability study of Over Burden (OB) dump needs to be carried out for maintaining them at the steepest possible angle without any danger from the stability point of view. One of the most important input parameters for stability analysis is the shear strength i.e., cohesion and angle of internal friction of the heterogeneous dump mass. To assess the shear strength behaviour of OB materials, a large direct shear machine (LDSM) is designed and developed at CMPDI Ranchi. To facilitate the testing of materials with bigger particle sizes, LDSM features a shear box of dimension 1000 mm × 1000 mm × 1000 mm. A large specimen with a thickness up to 500 mm and maximum particle size (Dmax) up to 80 mm can be tested in accordance with ASTM D3080-98 (ASTM D3080 in Standard Test Method for Direct Shear Test of Soils Under Consolidated Drained Conditions. ASTM International, West Conshohocken, PA, 2011). 7 different OB materials from Magadh Coalfields were collected and tested for their shear strength. With obtained shear strength parameters, various profiles of slopes are checked for slope stability using 2D limit equilibrium softwares Slide2 and GALENA to determine an optimised slope profile. The probabilistic modelling is adopted to produce a statistically distributed Factor of Safety (FoS) rather than a deterministic value to avoid the uncertainties associated with the input parameters. This paper aims to predict the higher safer height for OB dumps based on shear strength parameters.

Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the Rocscience International Conference (RIC 2023)
Series
Atlantis Highlights in Engineering
Publication Date
8 November 2023
ISBN
10.2991/978-94-6463-258-3_11
ISSN
2589-4943
DOI
10.2991/978-94-6463-258-3_11How to use a DOI?
Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Sravan Kumar Gara
AU  - Nirbhay Narayan Singh
AU  - Randip Singh
AU  - K. S. Rao
PY  - 2023
DA  - 2023/11/08
TI  - Slope Stability Analysis for Optimisation of Overburden Dump Capacity in Opencast Coal Mines
BT  - Proceedings of the Rocscience International Conference  (RIC 2023)
PB  - Atlantis Press
SP  - 109
EP  - 118
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-258-3_11
DO  - 10.2991/978-94-6463-258-3_11
ID  - Gara2023
ER  -