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@PHDTHESIS{Randaxhe:538917,
      author       = {Randaxhe, René},
      othercontributors = {Martens, Per Nicolai and Preuße, Axel},
      title        = {{E}in {B}eitrag zur {E}ntwicklung und {B}ewertung von
                      {A}bbauverfahren zur {E}rhöhung der {E}xtraktionsrate im
                      deutschen {K}alibergbau},
      address      = {Aachen},
      reportid     = {RWTH-CONV-207619},
      pages        = {VIII, 179 S. : Ill., graph. Darst.},
      year         = {2015},
      note         = {Zsfassung in dt. und engl. Sprache; Aachen, Techn.
                      Hochsch., Diss., 2015},
      abstract     = {German potash mining as an important part of the German
                      mining industry has an over 150-years old tradition.
                      However, extraction at increasing depths of the potash seams
                      in combination with the Room $\&$ Pillar mining method lead
                      to lower extraction rates in underground mining due to rock
                      mechanical restrictions resulting in increas-ing pillar
                      sizes. Against this background the thesis makes a
                      contribution to efforts to increase the extraction rate in
                      German underground potash mining.Based on the mining method
                      presently applied in flat potash seams, the author shows
                      innovative approaches for suitable mining methods for
                      increased extraction rates. For this purpose computer-based
                      models were developed, the results are demonstrated and
                      finally evaluated regarding optimization of extraction
                      rates. Im-portant mining factors such as mineral extraction
                      method, rock mechanics and back-fill operations influencing
                      requirements of the mining method are characterized.The
                      computer-based models include the following mining methods:
                      Room $\&$ Pillar Mining, Room $\&$ Pillar Mining with
                      Backfill Operations, Room $\&$ Pillar Mining with Pillar
                      Recovery and Backfill Operations, Stope $\&$ Pillar Mining
                      with Backfill Operations as well as Stope $\&$ Pillar Mining
                      with Pillar Recovery and Backfill Operations. With the input
                      of individual parameters in the computer-based models a
                      modification of the underground mining method is
                      possible.The computer-based models provide a functional tool
                      for a technical and economic evaluation of the developed
                      mining methods for flat potash deposits. Consequently the
                      evaluation of the selected mining method for flat deposits
                      can be determined in advance. Moreover the computer-based
                      models provide a technical and economic optimization of the
                      developed mining method.},
      cin          = {511110 / 511110 / 510000},
      ddc          = {624},
      cid          = {$I:(DE-82)511110_20151029$ / $I:(DE-82)511110_20140620$ /
                      $I:(DE-82)510000_20140620$},
      typ          = {PUB:(DE-HGF)11},
      url          = {https://publications.rwth-aachen.de/record/538917},
}