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- Title
Experimental Investigation of Non-Darcy Flow in Sandstone.
- Authors
Ni, Xiaoyan; Kulatilake, Pinnaduwa; Chen, Zhanqing; Gong, Peng; Kong, Hailing
- 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.
- Subjects
SANDSTONE; SEDIMENTARY rocks; PERMEABILITY; EXCAVATION; COAL mining
- Publication
Geotechnical & Geological Engineering, 2016, Vol 34, Issue 6, p1835
- ISSN
0960-3182
- Publication type
Article
- DOI
10.1007/s10706-016-9992-y