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Laboratory tests of filtration coefficient of selected materials used in liquidating shafts in collieries

  • Geomechanics
  • Published:
Journal of Mining Science Aims and scope

Abstract

There are a lot of dangers associated with closing mine shafts which may emerge during its liquidation works, and after liquidation of a shaft. The most important of them are: methane hazard, water hazard, and public safety hazard, which are commonly connected with occurrence of sinkholes. In the process of shaft liquidation it is extremely important to choose the right backfill materials, which determine stability of the backfill column and proper drainage of the backfill, which will match or exceed potential flow of water into a shaft. When the water flows into a liquidated shaft the main problem is a change in permeability coefficient of the used backfill materials due to grain degradation resulting from the fall into a shaft and the pressure within the backfill column. The article presents results of laboratory tests on the influence of vertical pressure on filtration coefficient and compressibility of the most commonly used backfill materials. During the tests, samples of the materials were loaded in a hydraulic press, simulating in this way the increase in vertical pressure within the backfill column. Compressibility of a given material and the change in filtration coefficient were assessed.

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Authors and Affiliations

  1. Central Mining Institute, Plac Gwarków 1, Katowice, 40-166, Poland

    S. Prusek, J. Całus Moszko & P. Bukowski

Authors
  1. S. Prusek
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  2. J. Całus Moszko
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  3. P. Bukowski
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Correspondence to S. Prusek.

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Prusek, S., Całus Moszko, J. & Bukowski, P. Laboratory tests of filtration coefficient of selected materials used in liquidating shafts in collieries. J Min Sci 50, 265–276 (2014). https://doi.org/10.1134/S1062739114020094

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  • DOI: https://doi.org/10.1134/S1062739114020094

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