Investigating the effects of rainfall and groundwater on coal mine waste dump stability: a case study

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Authors

  • Prashant Kumar Nayak
     ,IN
  • A. K. Dash
     ,IN
  • Pankaj Dewangan
     ,IN

DOI:

https://doi.org/10.18311/jmmf/2021/28542

Keywords:

Waste dump, dump stability, rainfall, groundwater, infiltration, saturation, pore pressure

Abstract

Sudden inrush of rainwater in the waste dump as well as the saturation of the dump material in case it is constructed near the source of water, increases the risk of dump failures due to water infiltration through the dump. A number of dump failures have been reported in the past during monsoon season. Understanding the hydrogeology of the project area and prospective sites should be required to be considered while designing and constructing the dumps. High groundwater levels and pore pressures in the dump foundation adversely affect the static dump stability. Construction of waste dump changes the natural ground levels and flow regime. Water induced failure like ponding of surface should be avoided, particularly adjacent to dump crests by drainage ponding. In this present study, the rainfall-induced waste dump profile of the Srirampur opencast project is addressed by understanding its climatic and hydrogeological conditions. An infiltration analysis of single event rainfall conditions was performed with a focus on cumulative rainfall calculations. Instability calculations need consideration for the seepage force which is an internal force when the soil grains alone and soil skeleton plus the water are considered for the free body. For this purpose, under the steady-state time-dependent flow, an analysis on the influence of single event rainfall was built from the rainfall data to know the parameters for infiltration and seepage conditions. Stability calculations were performed in FLAC2D for any uplift force exertion on the bottom of the coal waste dump in the operating mining conditions.

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Published

2021-09-02

How to Cite

Kumar Nayak, P., Dash, A. K., & Dewangan, P. (2021). Investigating the effects of rainfall and groundwater on coal mine waste dump stability: a case study. Journal of Mines, Metals and Fuels, 69(7), 233–240. https://doi.org/10.18311/jmmf/2021/28542

Issue

Volume 69, Issue 7, July 2021

Section

Articles
Crossref
Scopus
Google Scholar
Europe PMC
Received 2021-09-02
Accepted 2021-09-02
Published 2021-09-02

 

References

Bhattacharya, J. (2009): Guidance for Solving Environmental Challenges of Mining, Construction, Processing and Oil and Gas Fields Projects – Clearance, Design, Engineering, Inspection and Management, 1st Edition, Wide Publishing, India.

Blight, G. E. (2010): Geotechnical Engineering for Mine Waste Storage Facilities, CRC Press.

Briaud, J. L. (2013): Geotechnical Engineering: Unsaturated and Saturated Soils, John Wiley & Sons.

Chaulya, S. K., and Prasad, B. M. (2016): Sensing and Monitoring Technologies for Mines and Hazardous Areas - Monitoring and Prediction Technologies, Elsevier.

Collins, B. D., and Znidarcic, D. (2004): Stability Analyses of Rainfall-induced Landslides. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, Vol. 130, Issue 4, pp 362-372.

Dash A K (2019): Analysis of accidents due to slope failure in Indian opencast coal mines. Curr Sci 117(2):304.

Desai, C. S., and Zaman, M. (2010): Advanced Geotechnical Engineering - Soil-Structure Interaction Using Computer and Material Models, CRC Press.

DGMS (Tech.) Circular No. 03/2020, Dhanbad, Dated- 16.02.2020, Subject: Guidelines for Scientific Study under regulation 106 Coal Mines Regulations, 2017.

FLAC/Slope Users' Guide (2011): Command Reference, FISH and Theory and Background, Minneapolis Itasca Consulting Group

Hawley, M., and Cunning, J. (2017): Guidelines for Mine Waste Dump and Stockpile Design, CSIRO Publishing, CRC Press.

Horton, R. E. (1940): An Approach toward a Physical Interpretation of Infiltration Capacity, Soil Science Society of American Journal, Vol. 5, pp 399-417.

Hudak, P. F. (2005): Principles of Hydrogeology, 3rd Edition, CRC Press.

Kisch, M. (1959): The Theory of Seepage from Clayblanketed Reservoirs, Geotechnique, Vol. 9, Issue 1, pp 9-21.

Koner, R., and Chakravarty, D. (2016): Numerical Analysis of Rainfall Effects in External Overburden Dump, International Journal of Mining Science and Technology, Volume 26, Issue 5, pp 825-831, Elsevier.

Kresic, N. (2007): Hydrogeology and Groundwater Modeling, 2nd Edition, CRC Press.

Nayak, P. K., Dash, A. K., and Dewangan, P. K., (2019): Design Considerations for Waste Dumps in Indian Opencast Coal Mines: A Critical Appraisal, ICOMS, 2nd International Conference, 13-14 December 2019, pp 19- 31.

Nayak, P. K., Dash, A. K., and Dewangan, P. K., (2021): Mine Waste Dump Instability and Monitoring Using Predictive Knowledge-Based Stability Rating and Hazard Classification System, ICOMS, 3rd International Conference, 22-23 Jan 2021, pp 195-204.

Naylor, D. J., and Pande, G. N. (1981): Finite Elements in Geotechnical Engineering, 1st Edition, Pineridge Press Ltd, Swansea, U.K.

Ng, C. W. W., and Shi, Q. (1998): Numerical Investigation of the Stability of Unsaturated Soil Slopes Subjected to Transient Seepage, Computers and Geotechnics, Vol.22, Issue 1, pp 1-28.

Novak, V., and Hlavacikova, H. (2019): Applied Soil Hydrology, Springer Nature.

Rahardjo, H., Ong, T. H., Rezaur, R. B., and Leong, E. C. (2007): Factors Controlling Instability of Homogeneous Soil Slopes under Rainfall, Journal of Geotechnical and Geoenvironmental Engineering, Vol 133, Issue 12, pp 1532-1543.

Rao, S. N. (2017): Hydrology – Problems with Solutions, PHI Learning.

Sen, Z. (2015): Practical and Applied Hydrogeology, ITU Hydraulics Lab. Maslak, 1st Edition, Elsevier.