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作者:

Yin, Qian (Yin, Qian.) | Ma, Guowei (Ma, Guowei.) | Jing, Hongwen (Jing, Hongwen.) | Wang, Huidong (Wang, Huidong.) | Su, Haijian (Su, Haijian.) | Wang, Yingchao (Wang, Yingchao.) | Liu, Richeng (Liu, Richeng.)

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EI Scopus SCIE

摘要:

This study experimentally analyzed the influence of shear processes on nonlinear flow behavior through 3D rough-walled rock fractures. A high-precision apparatus was developed to perform stress-dependent fluid flow tests of fractured rocks. Then, water flow tests on rough-walled fractures with different mechanical displacements were conducted. At each shear level, the hydraulic pressure ranged from 0 to 0.6 MPa, and the normal load varied from 7 to 35 kN. The results show that (i) the relationship between the volumetric flow rate and hydraulic gradient of rough-walled fractures can be well fit using Forchheimer's law. Notably, both the linear and nonlinear coefficients in Forchheimer's law decrease during shearing; (ii) a sixth-order polynomial function is used to evaluate the transmissivity based on the Reynolds number of fractures during shearing. The transmissivity exhibits a decreasing trend as the Reynolds number increases and an increasing trend as the shear displacement increases; (iii) the critical hydraulic gradient, critical Reynolds number and equivalent hydraulic aperture of the rock fractures all increase as the shear displacement increases. When the shear displacement varies from 0 to 15 mm, the critical hydraulic gradient ranges from 0.3 to 2.2 for a normal load of 7 kN and increases to 1.8-8.6 for a normal load of 35 kN; and (iv) the Forchheimer law results are evaluated by plotting the normalized transmissivity of the fractures during shearing against the Reynolds number. An increase in the normal load shifts the fitted curves downward. Additionally, the Forchheimer coefficient beta decreases with the shear displacement but increases with the applied normal load. (C) 2017 Elsevier B.V. All rights reserved.

关键词:

3D rough-walled fractures Shear displacement Critical hydraulic gradient Nonlinear flow Normalized transmissivity Reynolds number

作者机构:

  • [ 1 ] [Yin, Qian]China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
  • [ 2 ] [Jing, Hongwen]China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
  • [ 3 ] [Su, Haijian]China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
  • [ 4 ] [Wang, Yingchao]China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
  • [ 5 ] [Liu, Richeng]China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
  • [ 6 ] [Yin, Qian]Univ Western Australia, Sch Civil Environm & Min Engn, Perth, WA 6009, Australia
  • [ 7 ] [Ma, Guowei]Univ Western Australia, Sch Civil Environm & Min Engn, Perth, WA 6009, Australia
  • [ 8 ] [Ma, Guowei]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 9 ] [Wang, Huidong]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • [Liu, Richeng]China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China

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来源 :

JOURNAL OF HYDROLOGY

ISSN: 0022-1694

年份: 2017

卷: 555

页码: 169-184

6 . 4 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:165

中科院分区:1

被引次数:

WoS核心集被引频次: 127

SCOPUS被引频次: 125

ESI高被引论文在榜: 0 展开所有

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