2D distinct element analyses of thermo-hydro-mechanical coupling effects for a drift with bolt-shotcrete supporting in a conceptual nuclear waste repository

ZHANG Yu-jun; XU Gang

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2D distinct element analyses of thermo-hydro-mechanical coupling effects for a drift with bolt-shotcrete supporting in a conceptual nuclear waste repository

更新时间：2026-06-25

- 2D distinct element analyses of thermo-hydro-mechanical coupling effects for a drift with bolt-shotcrete supporting in a conceptual nuclear waste repository
- Vol. 34, Issue S1, (2013)
- 作者机构：
  
  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,武汉,430071
- 作者简介：
- 基金信息：
- DOI：
  CLC： X771
- Online First：09 June 2014，
  
  Published：2013
- 稿件说明：
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ZHANG Yu-jun, XU Gang. 2D distinct element analyses of thermo-hydro-mechanical coupling effects for a drift with bolt-shotcrete supporting in a conceptual nuclear waste repository[J]. 2013, 34(S1).
DOI：

ZHANG Yu-jun, XU Gang. 2D distinct element analyses of thermo-hydro-mechanical coupling effects for a drift with bolt-shotcrete supporting in a conceptual nuclear waste repository[J]. 2013, 34(S1). DOI：

摘要

假定一个核废料地质处置库位于具有一定水头的饱和节理岩体中，开挖完闭施作系统锚杆和喷混凝土支护。对坑道建造和一个50年期的热-水应力（T-H-M）耦合运营过程，使用UDEC程序进行数值模拟，分析无、有支护时近场围岩中的应力、变形、塑性区、温度、渗流的变化状态，以及不同场（温度、渗流、应力）耦合条件下的锚杆和喷混凝土中的承载情况。结果显示，喷混凝土和系统锚杆支护不仅具有常规的支护功能，并且可阻滞地下水从坑道表面的自由渗出，使得围岩中塑性区减小，裂隙水压力和温度升高；相比于应力单场作用的情况，在热-水-力耦合的条件下洞室围岩的稳定性下降，支护结构的受力状况变差。

Abstract

It is assumed that a conceptual disposal repository for nuclear waste is located in a saturated jointed rock mass with certain water head

and a supporting system composed of rock bolts and shotcrete is installed after excavation of the drift. The construction of drift and a coupled thermo-hydro-mechanical(T-H-M) operation process of 50 years are simulated numerically by using UDEC code. The changes of stresses

displacements

plastic zones

temperatures

water flow in the rock mass of near field are analysed for cases with and without supporting; and the loading states of bolts and shotcrete are investigated under the conditions of coupling with different fields (temperature

water and stress). The results show: not only the rock bolts and shotcrete have the routine support function

but also are able to block free seepage of groundwater from the drift surface

so making plastic zone decrease

fracture pressure and temperature rise; compared with the case of action only by single stress field

the stability of surrounding rock mass is reduced

and the loading state of supporting structure is degenerated in the case of thermo-hydro-mechanical coupling.

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