| 地质系统热-水-力耦合作用的随机建模初步研究 |
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| 引用本文： | 孙培德.地质系统热-水-力耦合作用的随机建模初步研究[J].岩土力学,2003(Z2). |
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| 作者姓名： | 孙培德 |
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| 作者单位： | 杭州商学院环境工程系 浙江杭州310035 |
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| 摘 要： | 热-水-力(THM)耦合作用是岩石力学与环境地质中的重要基础理论问题,核废料地质处置库周围的缓冲材料和围岩中的热-水-力耦合现象将影响其力学稳定性、热传导性和渗透性,进而影响放射性核素在裂隙岩体中的迁移规律。核废料或放射性废料的地下深埋处置是国际上正在研究的永久性隔离的有效方法之一。因此,对核废料地质处置法安全性评估的一个重要内容就是对裂隙岩体中力学稳定性与构造应力、地下水渗流及热载荷等的耦合作用之数值模拟和评估。这已成为当前刻不容缓的重要的环境影响评价课题。笔者研究了温度场-渗流场-应力场中热传导系数和渗透率以及岩体力学参数的空间变异性,用实验方法研究三场耦合效应及裂隙岩体的场性能等效处理,试图建立热-水-力耦合作用的随机性数学模型及可视化数值模拟方法,为核废料地质处置安全性评估提供直观的新方法。
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| 关 键 词： | 热-水-力耦合 数学模型 随机分析 可视化模拟 |
A preliminary study of stochastic modeling for thermo-hydro- mechanical effects in geosystem |
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| SUN Pei-de.A preliminary study of stochastic modeling for thermo-hydro- mechanical effects in geosystem[J].Rock and Soil Mechanics,2003(Z2). |
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| Authors: | SUN Pei-de |
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| Institution: | SUN Pei-de 1,2 |
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| Abstract: | It is the important fundamental theoretical issue in the fields of rock mechanics and environmental geology that the coupled thermal-hydrological-mechanical (THM) relating to nuclear waste repository design and safety assessment is presented. That is, the coupled THM behavior of all components (canister, buffer, fractured rock, and water) can be interaction with thermo-hydro-mechanical processes in the geological system, and then can effect the transportation of radioactive element through the fractured rock mass. It is one of the effective methods in international that the methods for nuclear waste or radioactive waste geological repository are developing as permanent one. Therefore, it is an important field relating to nuclear waste geological repository design and performance assessment that the numerical simulation and safety assessment for coupled THM in the fractured rock mass has been performed. And it has become an important problem of the environmental impact assessment so far. In this paper, the space variability for the conductivity, permeability and parameters of rock mechanical property in the THM fields have been studied. The interaction of coupled THM fields has been studied with the experimental method and the field continuity for crack rock mass has been equivalent to handle in order to establish conceptually the coupled THM stochastic mathematical model and the visual simulation method as well as to present the new safety assessment approach for the geological nuclear waste repositories. |
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| Keywords: | coupled for thermal-hydrological-mechanical mathematical modeling stochastic analysis visual simulations |
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