A thermo-hydro-mechano-chemical formulation for modeling water transport around a ventilated tunnel in an argillaceous rock
A thermo-hydro-mechano-chemical formulation for modeling water transport around a ventilated tunnel in an argillaceous rock
复制标题
用于模拟泥质岩石中通风隧道周围水传输的热水力机械化学公式
DOI：
10.1016/j.jrmge.2013.03.003
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发表时间：
2013-04
影响因子：
7.3
通讯作者：
Quansheng Liu
中科院分区：
文献类型：
--
作者：
Chengyuan Zhang;Xiaoyan Liu;Quansheng Liu
泥质岩被认为是深部地质处置的潜在寄主岩。在DECOVALEX-2011的研究工作中，5个参与研究小组对建立在泥质岩层中的蒙特特里地下实验室进行了实验室干燥测试和通风实验的模拟。本研究首先建立了一个热-水-力-化学耦合过程模型来模拟通风隧道周围岩石中的水输运。特别是在该THMC公式中，引入了三相双组分水力模型，模拟了隧道通风过程中岩石的脱饱和/再饱和、相变和气岩界面等过程，并对Opalinus粘土参数集进行了探索。研究发现，黏土岩含水率的演化对固有渗透率、相对渗透率和毛管压力非常敏感。围岩失水对开挖破坏区引起的粘土渗透性变化十分敏感。基于耦合THMC公式，对通风试验巷道附近岩石中的化学溶质运移进行了模拟。可以估计，化学渗透流对水流模拟的意义不大。5个小组的模拟结果与实验观测结果比较，结果吻合较好。这增加了建模的可信度，为全面了解泥质岩石的水分运移和力学行为提供了一个良好的开端。
Argillaceous rocks are being considered as potential host rocks for deep geological disposal. For the research work in DECOVALEX-2011, 5 participant research teams performed simulations of a laboratory drying test and a ventilation experiment for Mont Terri underground laboratory built in argillaceous rock formation. Our study starts with establishing a coupled thermo-hydro-mechano-chemical (THMC) processes model to simulate water transport in rock around the ventilated tunnel. Especially in this THMC formulation, a three-phase and two-constituent hydraulic model is introduced to simulate the processes which occur during tunnel ventilation, including desaturation/resaturation in the rock, phase change and air/rock interface, and to explore the Opalinus clay parameter set. It can be found that water content evolution is very sensitive to intrinsic permeability, relative permeability and capillary pressure in clay rock. Water loss from surrounding rock is sensitive to the change of permeability in clay which is induced by excavation damaged zone. Chemical solute transport in the rock near ventilation experiment tunnel is simulated based on the coupled THMC formulation. It can be estimated that chemical osmotic flow has little significance on water flow modeling. Comparisons between simulation results from 5 teams and experimental observations show good agreement. It increases the confidence in modeling and indicates that it is a good start for fully THMC understanding of the moisture transportation and mechanical behavior in argillaceous rock.
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DOI：
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发表时间：
1995
期刊：
--
影响因子：
--
作者：
N. Khalili;M. Khabbaz
通讯作者：
N. Khalili;M. Khabbaz
DOI：
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发表时间：
1989
期刊：
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影响因子：
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作者：
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发表时间：
2006
期刊：
Chinese journal of rock mechanics and engineering
影响因子：
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作者：
L. Xiaoyan
通讯作者：
L. Xiaoyan
DOI：
10.1016/s1365-1609(03)00113-8
发表时间：
2003-10
影响因子：
7.2
作者：
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通讯作者：
C. Martin;G. Lanyon
DOI：
10.1002/(sici)1096-9853(20000410)24:4
发表时间：
2000-04
影响因子：
4
作者：
C. Callari;F. Federico
通讯作者：
C. Callari;F. Federico