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

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Abstract

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.

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Authors and Affiliations

  1. CSIRO Coal Mining Research Program, Queensland Centre for Advanced Technologies, 1 Technology Court, Pullenvale, QLD, 4300, Australia

    Manoj Khanal, Deepak Adhikary, Chandana Jayasundara & Rao Balusu

Authors
  1. Manoj Khanal
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  2. Deepak Adhikary
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  3. Chandana Jayasundara
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  4. Rao Balusu
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Correspondence to Manoj Khanal.

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Khanal, M., Adhikary, D., Jayasundara, C. et al. Numerical Study of Mine Site Specific Multiseam Mining and Its Impact on Surface Subsidence and Chain Pillar Stress. Geotech Geol Eng 34, 217–235 (2016). https://doi.org/10.1007/s10706-015-9940-2

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  • DOI: https://doi.org/10.1007/s10706-015-9940-2

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