Experimental Investigation of Non-Darcy Flow in Sandstone

被引：6
|
作者：
Ni X. [1 ,2 ,3 ]
Kulatilake P.H.S.W. [3 ]
Chen Z. [2 ]
Gong P. [2 ]
Kong H. [4 ]
机构：
[1] School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu
[2] State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu
[3] Rock Mass Modeling and Computational Rock Mechanics Laboratories, Department of Mining and Geological Engineering, University of Arizona, 1235 E. James E. Rogers Way, Rm. 235, Tucson, 85721, AZ
[4] Civil Engineering Department, Yancheng Institute of Technology, Yancheng, 224051, Jiangsu
来源：
Kulatilake, Pinnaduwa H. S. W. (kulatila@u.arizona.edu) | 1835年 / Springer International Publishing卷 / 34期
关键词：
Acceleration coefficient; Coal mines; Non-Darcy flow β factor; Permeability; Transient seepage method;
D O I：
10.1007/s10706-016-9992-y
中图分类号：
学科分类号：
摘要：
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. © 2016, Springer International Publishing Switzerland.
引用
收藏
页码：1835 / 1846
页数：11
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