Stability Analysis of Host Claystone under T-M Coupling of HLW Disposal Repository in China: Experiments and Numerical Simulation
Stability Analysis of Host Claystone under T-M Coupling of HLW Disposal Repository in China: Experiments and Numerical Simulation
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中国高放废物处置场T-M耦合下主体粘土稳定性分析：实验与数值模拟
DOI：
10.1155/2021/8118021
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发表时间：
2021-09
期刊：
影响因子：
1.7
通讯作者：
Juan Zhang
中科院分区：
文献类型：
--
作者：
Haian Liang;Tan Tang;Longpeng Zhang;Xiaodong Liu;Shuai Liu;Ting Yang;Xinjun Cheng;Juan Zhang
本文重点研究中国塔木苏地区拟建粘土岩中高放放射性废物（HLW）的稳定性。高放废物储存过程中核素衰变引起的地应力和环境温度的变化特征应该是明显的。对目标地层中的岩石样品进行了一系列热性质测试和热机耦合强度（T-M）测试。然后通过数值方法对高放热放热与地应力联合作用下高放放热围岩的稳定性进行了模拟分析。 Tamusu粘土岩石样品的热特性是通过测试其导热系数来获得的。为了获得不同温度下岩石样品的特性和破坏模式，开展了100℃温度范围内的T-M耦合实验。建立了模拟隧道内埋置核废料储罐100年内运行状态的数值模型。模型中考虑了 HLW 热释放方程的热边界和 Tamusu 地区的真实地应力水平。同时，通过数值计算得到了围岩温度、应力、变形随埋入时间的变化规律。最后对深层地质处置库的稳定性进行综合评价。结果表明，温度对塔木苏粘土岩的时温耦合特征有显着影响，所提出的储库数值模型100年内未出现大的变形破坏问题。但运营期间，处置库围岩温度可能会超过安全标准值。
This paper focuses on the stability of the high-level radioactive waste (HLW) in the proposed clay rock in Tamusu area of China. The in-situ stress as well as the variational characteristics of ambient temperature caused by nuclide decay during HLW storage should be noticeable. A series of thermal property tests and thermo-mechanical coupled strength (T-M) tests of rock samples in the target formation are carried out. Then the stability of surrounding rock of an HLW under the combination of heat release from HLW and in-situ stress is simulated and analyzed by numerical method. Thermal properties of Tamusu clay rock samples are obtained by testing their thermal conductivity. In order to obtain the characteristics and the failure modes of rock samples at different temperatures, the T-M coupling experiments in the temperature range of 100°C are conducted. Numerical model for simulating the state of operation of the nuclear waste tank buried in the tunnel within 100 years is constructed. A thermal boundary by the heat release equation of HLW and the real in-situ stress level in Tamusu area are considered in the model. While, the variation law of surrounding rock’s temperature, stress, and deformation corresponding to the embedding time is obtained from the numerical calculation. Finally, the stability of the deep geological repository is comprehensively evaluated. The results show that the temperature has a significant impact on the T-M coupling characteristics of Tamusu clay rock, and the proposed repository numerical model has no large deformation and failure problems in 100 years. However, the temperature of the surrounding rock of the repository may exceed the safety standard value during the operation period.
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影响因子：
5.3
作者：
G. Chen;X. Sillen;J. Verstricht;X. L. Li
通讯作者：
G. Chen;X. Sillen;J. Verstricht;X. L. Li
DOI：
10.1016/j.ijrmms.2016.09.013
发表时间：
2016-12
影响因子：
7.2
作者：
V. Favero;A. Ferrari;L. Laloui
通讯作者：
V. Favero;A. Ferrari;L. Laloui
DOI：
--
发表时间：
2009
期刊：
--
影响因子：
--
作者：
Kang Yufeng
通讯作者：
Kang Yufeng
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影响因子：
3.7
作者：
Liu, Xuesheng;Fan, Deyuan;Ma, Qing
通讯作者：
Ma, Qing
影响因子：
6.2
作者：
N. Conil;M. Vitel;C. Plúa;M. Vu;D. Seyedi;G. Armand
通讯作者：
N. Conil;M. Vitel;C. Plúa;M. Vu;D. Seyedi;G. Armand