低温裂隙岩体水-热耦合模型研究及数值分析

doi:10.16285/j.rsm.2017.0721

›› 2018, Vol. 39 ›› Issue (2): 735-744.doi: 10.16285/j.rsm.2017.0721

低温裂隙岩体水-热耦合模型研究及数值分析

黄诗冰^{1, 2}，刘泉声³，程爱平^{1, 2}，刘艳章^{1, 2}

1. 武汉科技大学资源与环境工程学院，湖北武汉 430081；2. 武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室，湖北武汉 430081； 3. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，湖北武汉 430071

收稿日期:2017-04-17 出版日期:2018-02-10 发布日期:2018-06-06
作者简介:黄诗冰，男，1989年生，博士，讲师，主要从事岩石力学与矿业工程方面的教学与研究工作。
基金资助:
国家自然科学基金青年基金项目（No. 41702291，No. 51604195）；湖北省自然科学基金项目（No. 2015CFA142）。

A coupled hydro-thermal model of fractured rock mass under low temperature and its numerical analysis

HUANG Shi-bing^{1, 2}, LIU Quan-sheng³, CHENG Ai-ping^{1, 2}, LIU Yan-zhang^{1, 2}

1. School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China; 2. Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China; 3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China

Received:2017-04-17 Online:2018-02-10 Published:2018-06-06
Supported by:
This work was supported by the National Natural Science Foundation of China (41702291, 51604195) and the Natural Science Foundation of Hubei Province (2015CFA142).

摘要/Abstract

摘要： 裂隙渗流会引起裂隙周围岩体中的温度场变化，在低温岩体中其影响更为明显；此外，裂隙水与周围低温岩石介质发生热交换会引起裂隙中的水冰相变过程发生，而裂隙水冻结将阻碍裂隙渗流，引起裂隙渗流场的变化。因此，低温下的裂隙岩体水-热相互作用是一个强耦合过程。考虑裂隙中的水冰相变过程和渗流作用，建立了低温冻结条件下裂隙岩体水-热耦合模型；以冻结法施工为例，考察了低温冻结过程中裂隙水渗流对裂隙冻结交圈的影响。研究结果表明：由于裂隙渗流的存在，距裂隙较远处岩石先冻结，裂隙冻结所需时间远大于周围岩石；裂隙宽度和裂隙水压力差都会影响冻结交圈时间，裂隙越宽、水压力差越大，裂隙冻结需要时间越长；随着冻结时间的推进，裂隙水渗流速度逐渐降低，当裂隙冻结后裂隙渗流停止。最后通过构建随机裂隙网络模型，利用所建立的水-热耦合模型考察了裂隙网络渗流对冻结交圈的影响，说明了在冻结法施工中考虑裂隙的重要性。

关键词: 低温裂隙岩体, 水-热耦合, 裂隙渗流, 水冰相变, 冻结法

Abstract: Fracture seepage can result in a change of temperature fields of rock around cracks, which is more apparent in particular under low temperature. In addition, heat exchange between fracture water and the cold rock medium may induce water/ice phase transition in fractures. The generation of solid ice prevents water from flowing in fractures, which leads to a change of the seepage field of fractured rock mass. Thus, this hydro-thermal coupling action of fractured rock mass under low temperature is extreme. By considering water/ice phase transition and fracture seepage, a coupled hydro-thermal model is developed for fractured rock mass under low temperature. To illustrate the influence of fracture flow on the freezing process, an example of the artificial freezing method is investigated. The results show that the rock medium far from fractures is frozen earlier for fracture flow and the completed freezing time of seepage fractures are more than that of rock medium. Both the fracture width and delivery head of fracture water affect completed freezing time. The completed freezing time increases with the increase of fracture width and delivery head of fracture water. The seepage velocity in fracture gradually decreases along with freezing time, and the fracture seepage stops after fracture water is frozen. Finally, by building a stochastic fracture network model, the impact of seepage in fracture network on the freezing process is studied using the proposed coupled hydro-thermal model. The calculated results indicate the significance of considering fracture seepage during artificial ground freezing.

Key words: fractured rock mass under low temperature, hydro-thermal coupling, fracture seepage, water/ice phase transition, artificial freezing method

中图分类号:

TU 452

黄诗冰，刘泉声，程爱平，刘艳章, . 低温裂隙岩体水-热耦合模型研究及数值分析[J]. , 2018, 39(2): 735-744.

HUANG Shi-bing, LIU Quan-sheng, CHENG Ai-ping, LIU Yan-zhang, . A coupled hydro-thermal model of fractured rock mass under low temperature and its numerical analysis[J]. , 2018, 39(2): 735-744.

参考文献

相关文章 13

[1]	刘阳辉, 胡向东, . 卸载状态下立井冻结壁的力学分析[J]. 岩土力学, 2018, 39(S2): 344-350.
[2]	王鹏，许金余，方新宇，王佩玺，刘少赫，王浩宇，. 红砂岩吸水软化及冻融循环力学特性劣化[J]. , 2018, 39(6): 2065-2072.
[3]	饶登宇, 白冰, 陈佩佩, . 基于SPH方法的非饱和多孔介质相变耦合研究[J]. 岩土力学, 2018, 39(12): 4527-4536.
[4]	许韬，白冰. 考虑物理性质参数变化的膨润土缓冲材料水-热耦合SPH数值解[J]. , 2018, 39(10): 3853-3862.
[5]	黄诗冰，刘泉声，程爱平，刘艳章，. 低温岩体裂隙冻胀力与冻胀扩展试验初探[J]. , 2018, 39(1): 78-84.
[6]	严成增. 模拟水压致裂的另一种二维FDEM-flow方法[J]. , 2017, 38(6): 1789-1796.
[7]	周晓敏 , 管华栋 , 罗晓青 , 王安保 . 竖井圆形冻结壁弹性设计理论的对比研究[J]. , 2013, 34(S1): 247-251.
[8]	胡向东，陈锦，汪洋，李伟平 . 环形单圈管冻结稳态温度场解析解[J]. , 2013, 34(3): 874-880.
[9]	吉植强，徐学燕. 季节冻土地区人工冻土墙的冻结特性研究[J]. , 2009, 30(4): 971-975.
[10]	肖忠华，胡向东，皮爱如，刘瑞锋,. 上海人工二次冻融土无侧限抗压强度研究[J]. , 2006, 27(S1): 497-500.
[11]	武亚军，杨敏，李大勇 . 大连路隧道联络通道冻土帷幕数值分析[J]. , 2006, 27(3): 487-490.
[12]	张社荣，杨璐玲，钟登华. 裂隙岩体渗流场分析及其三维有限元程序设计[J]. , 2005, 26(1): 46-49.
[13]	乔卫国，李大勇，吴祥祖，. 地铁联络通道冻结监测分析[J]. , 2003, 24(4): 666-669.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

低温裂隙岩体水-热耦合模型研究及数值分析

A coupled hydro-thermal model of fractured rock mass under low temperature and its numerical analysis

PDF (Chinese)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 13

Metrics

本文评价

推荐阅读 0