Numerical Study of Mine Site Specific Multiseam Mining and Its Impact on Surface Subsidence and Chain Pillar Stress

This paper investigates various multiseam mining related parameters using mine site specific data and numerical simulations. Two important mining effects—subsidence and stress—are analysed for different possible mining layouts. A geological mine dataset has been used to generate a numerical model. T...

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Bibliographic Details
Published in:Geotechnical and geological engineering 2016-02, Vol.34 (1), p.217-235
Main Authors: Khanal, Manoj, Adhikary, Deepak, Jayasundara, Chandana, Balusu, Rao
Format: Article
Language:English
Subjects:
Chains
Civil Engineering
Computer simulation
Earth and Environmental Science
Earth Sciences
Geotechnical Engineering & Applied Earth Sciences
Hydrogeology
Layouts
Mathematical models
Mining
Numerical prediction
Orientation
Original Paper
Predictive control
Subsidence
Terrestrial Pollution
Waste Management/Waste Technology
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Summary:This paper investigates various multiseam mining related parameters using mine site specific data and numerical simulations. Two important mining effects—subsidence and stress—are analysed for different possible mining layouts. A geological mine dataset has been used to generate a numerical model. The predicted surface subsidence magnitude and surface profile have been compared under different scenarios to assess potential options in multiseam mining strategies. The effects that seam separation distances, mining offset, panel layout and panel orientation each have on surface subsidence and chain pillar stress magnitude have been investigated. The numerical simulation shows that ascending or descending mining directions have little impact on controlling the surface subsidence in multiseam mining and predicted an almost identical maximum stress development at the chain pillars. Numerical simulations infer that the orientation of the top panels control the subsidence profile.
ISSN:0960-3182
1573-1529
DOI:10.1007/s10706-015-9940-2