Numerical modelling-based pillar strength estimation for an increased height of extraction
作者: Ashok KumarRakesh KumarArun K. SinghSahendra RamPradeep K. SinghRajendra Singh
作者单位: 1CSIR–Central Institute of Mining and Fuel Research
刊名: Arabian Journal of Geosciences, 2017, Vol.10 (18)
来源数据库: Springer Journal
DOI: 10.1007/s12517-017-3179-6
关键词: Thick coal seamSingle lift depillaringHeightened pillarNumerical modellingPillar strength
英文摘要: Underground extraction of total thickness of a thick coal seam in single lift by bord and pillar method increases pillar height during retreat. Field studies found that the increase in pillar height affects the depillaring operation adversely, especially, during caving of the strong/massive roof strata. Dilution in strength due to the increased pillar height caused catastrophic failure of barrier pillars and goaf overriding. This warrants a systematic study of pillar strength variation for the different heights of pillar. A review of different pillar strength estimation approaches for an analysis of the dilution in strength of the heightened pillar suggested that numerical modelling provides a better option for such a systematic study. Accordingly, investigations are conducted on...
原始语种摘要: Underground extraction of total thickness of a thick coal seam in single lift by bord and pillar method increases pillar height during retreat. Field studies found that the increase in pillar height affects the depillaring operation adversely, especially, during caving of the strong/massive roof strata. Dilution in strength due to the increased pillar height caused catastrophic failure of barrier pillars and goaf overriding. This warrants a systematic study of pillar strength variation for the different heights of pillar. A review of different pillar strength estimation approaches for an analysis of the dilution in strength of the heightened pillar suggested that numerical modelling provides a better option for such a systematic study. Accordingly, investigations are conducted on...
全文获取路径: Springer  (合作)
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影响因子:0.74 (2012)

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关键词翻译
关键词翻译
  • pillar 
  • strength 强度
  • height 高度
  • modelling 模型制造
  • variation 变异
  • thick 厚的
  • Pillar 柱子
  • systematic 有系统的
  • numerical 数字的
  • extraction 提取