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

页码：1835 / 1846

页数：11

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