Experimental Investigation of Non-Darcy Flow in Sandstone

Xiaoyan Ni, Pinnaduwa Kulatilake, Zhanqing Chen, Peng Gong, Hailing Kong

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

A study was conducted to investigate non-Darcy flow for sandstone using an experimental system designed and constructed by the research group. Non-Darcy flow was found to exist for both the pre-peak and post-peak strains; post-peak flow behavior showed a higher level of non-Darcy flow. In addition, the post peak permeability turned out to be about 2–3 times that of the pre-peak permeability. This sudden change in permeability that occurs when sedimentary rock masses around underground excavations develop new fractures may lead to water inrush in coal mines. All three non-Darcy permeability parameters showed significant changes between the pre-peak and post peak strains. The main reason for that is the formation of new cracks around and after the peak stress. Relations are developed among the three non-Darcy permeability parameters.

Original languageEnglish (US)
Pages (from-to)1835-1846
Number of pages12
JournalGeotechnical and Geological Engineering
Volume34
Issue number6
DOIs
StatePublished - Dec 1 2016

Keywords

  • Acceleration coefficient
  • Coal mines
  • Non-Darcy flow β factor
  • Permeability
  • Transient seepage method

ASJC Scopus subject areas

  • Architecture
  • Geotechnical Engineering and Engineering Geology
  • Soil Science
  • Geology

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