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International Journal of Science, Strategic Management and Technology

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ISSN: 3108-1762 (Online)
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INTEGRATED GEOTECHNICAL RISK ASSESSMENT OF ROOF–PILLAR–FLOOR INTERACTION IN UNDERGROUND COAL MINES UNDER INDIAN GEOLOGICAL CONDITIONS

AUTHORS:
Ashvin Gupta
Mentor
Ram Chandra Chaurasia
Affiliation
Department of Mining and Mineral Processing,

Lakshmi Narain College of Technology, Jabalpur, Madhya Pradesh, 482053, India
CC BY 4.0 License:
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Surface subsidence associated with pillar extraction represents a coupled geotechnical and societal hazard because the severity of ground movement depends not only on mining induced deformation but also on the vulnerability and exposure of surface assets. This study developed an integrated framework for assessing, classifying and spatially managing subsidence risk in Indian coalfields. The framework combined numerical subsidence predictions, field observations, deformation indicators and Geographic Information System (GIS)-based land-use analysis. Probability of surface damage was evaluated using subsidence magnitude, horizontal strain, curvature and geological uncertainty, while consequence assessment considered building vulnerability, infrastructure sensitivity, population density and land use. These components were integrated through a risk-classification matrix comprising very-low, low, medium, high and critical categories. Spatial risk maps were then developed by overlaying numerical subsidence contours with settlements and infrastructure. Jharia and Raniganj emerged as particularly important high-risk environments because mining-related deformation coincided with populated surface areas; Jharia was additionally affected by fire-related weakening and legacy workings. The framework demonstrated that areas experiencing similar deformation could have substantially different risk levels depending on surface vulnerability. Practical risk reduction measures included controlled depillaring, protective pillars, backfilling or stowing, continuous monitoring, structural reinforcement, buffer zones and relocation where avoidance was not feasible. The study concludes that subsidence management should progress from prediction of ground movement alone toward spatially explicit risk management integrating probability, consequence, monitoring and mine-planning decisions.

 
Keywords
subsidence risk; pillar extraction; GIS; risk zonation; surface damage; depillaring; Indian coalfields
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Gupta, A. (2026). Integrated Geotechnical Risk Assessment of Roof–Pillar–Floor Interaction in Underground Coal Mines under Indian Geological Conditions. International Journal of Science, Strategic Management and Technology, 02(9), 1-9. https://doi.org/10.55041/ijsmt.v2i9.002

Gupta, Ashvin. "Integrated Geotechnical Risk Assessment of Roof–Pillar–Floor Interaction in Underground Coal Mines under Indian Geological Conditions." International Journal of Science, Strategic Management and Technology, vol. 02, no. 9, 2026, pp. 1-9. doi:https://doi.org/10.55041/ijsmt.v2i9.002.

Gupta, Ashvin. "Integrated Geotechnical Risk Assessment of Roof–Pillar–Floor Interaction in Underground Coal Mines under Indian Geological Conditions." International Journal of Science, Strategic Management and Technology 02, no. 9 (2026): 1-9. https://doi.org/https://doi.org/10.55041/ijsmt.v2i9.002.

References
Agrawal, H. et al. (2022) ‘Rockburst and Gas Outburst Forecasting using a Probabilistic Risk Assessment Framework in Longwall Top Coal Caving Faces’, Rock Mechanics and Rock Engineering, 56(10), pp. 6929–6958. doi:10.1007/s00603-022-03076-3.

Avchar, A. et al. (2024) ‘Subsidence Analysis for Old Abandoned Board and Pillar Coal Mines Using ANSYS and Monte Carlo Simulation’, Journal of Mining Science, 60(3), pp. 387–396. doi:10.1134/s1062739124030049.

Cai, Y. et al. (2023) ‘A review of monitoring, calculation, and simulation methods for ground subsidence induced by coal mining’, International Journal of Coal Science & Technology, 10(1). doi:10.1007/s40789-023-00595-4.

Helm, P., Davie, C.T. and Glendinning, S.G. (2012) ‘Numerical modelling of shallow abandoned mine working subsidence affecting transport infrastructure’, Engineering Geology, 154, pp. 6–19. doi:10.1016/j.enggeo.2012.12.003.

Kolikipogu, N.R. et al. (2025) ‘Analytical and Numerical Modeling Approaches for Estimating the Optimum Line of Extraction in Continuous Miner Workings with Field Observations’, International Journal of Geomechanics, 25(6). doi:10.1061/ijgnai.gmeng-10788.

Matloob, S., Li, Y. and Khan, K.Z. (2021) ‘Safety Measurements and Risk Assessment of Coal Mining Industry Using Artificial Intelligence and Machine Learning’, Open Journal of Business and Management, 9(3), pp. 1198–1209. doi:10.4236/ojbm.2021.93064.

Merwe, J.N. van der (2020) ‘The development of a time-based probabilistic sinkhole prediction method for coal mining in the Witbank and Highveld coalfields’, Journal of the Southern African Institute of Mining and Metallurgy, 120(6). doi:10.17159/2411-9717/752/2020.

Rakesh, M. and Dash, A.K. (2025) ‘Strata Control Challenges and Monitoring Strategies in Indian Coal Mining under Complex Geotechnical Conditions’, Journal of Mines Metals and Fuels, pp. 2197–2206. doi:10.18311/jmmf/2025/49359.
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This article has undergone plagiarism screening and double-blind peer review. Editorial policies have been followed. Authors retain copyright under CC BY-NC 4.0 license. The research complies with ethical standards and institutional guidelines.
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