Influence of structure and water pressure on the hydraulic conductivity of the rock mass around underground excavations

被引：60

作者：

Huang, Zhen ^{[1
]}

Jiang, Zhenquan ^{[1
]}

Zhu, Shuyun ^{[1
]}

Wu, Xianshuai ^{[1
]}

Yang, Lining ^{[1
]}

Guan, Yunzhang ^{[2
]}

机构：

[1] China Univ Min & Technol, Sch Resources & Earth Sci, Xuzhou 221116, Jiangsu, Peoples R China

[2] Yanzhou Coal Min Co, Yanzhou Coal Mine Co, Zoucheng, Peoples R China

来源：

ENGINEERING GEOLOGY | 2016年 / 202卷

关键词：

Water injection test; Rock mass; Hydraulic conductivity; Rock structure; Damage zone; Seepage evolution; DAMAGED ZONE; PERMEABILITY; GRANITE; TESTS; COAL; BOREHOLE; FAILURE; TUNNELS; AQUIFER; DEFORMATION;

D O I：

10.1016/j.enggeo.2016.01.003

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

In this study, in situ water injection tests and numerical modeling in conjunction with core logs and television image measurements were applied for an investigation of the hydraulic properties of the rock mass around underground excavations. The aim of our work was to investigate the influence of rock structure and water pressure on the hydraulic conductivity of the rock mass around underground excavations. Thus, water injection tests were conducted in four boreholes that were drilled in the rock mass in underground tunnels in China. Seepage connection initiation and steady state seepage were proposed to identify the seepage evolution course within the rock mass by combining the results of pressure and hydraulic conductivity. Generally, hydraulic conductivity is strongly related to rock structure and water pressure. The results also revealed that a rearrangement of rock structure would occur in the damage zone, resulting in an increase in hydraulic conductivity of nearly one to several orders of magnitude. The results from the modified numerical model showed that the pore water distribution and the groundwater inflow rate are affected by both the hydraulic conductivity and the thickness of the damage zone and they are influenced more by the thickness of this zone. (c) 2016 Elsevier B.V. All rights reserved.

引用

页码：74 / 84

页数：11

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