摘要
针对核废料贮库围岩介质中的THM耦合作用下的岩体力学响应的特点,分析了THM耦合过程,利用O'C onnell的裂隙岩体等效弹性模量关系式中的裂隙密度概念意义,建立了温度作用下的裂隙密度与O da提出的裂隙张量之间的关系式;以裂隙结构面的开度、岩体裂隙数(包括受温度影响开通裂隙数)、裂隙连通率、附加应力、剪切膨胀等为研究对象,给出了具有THM耦合的渗流系数张量;在理论分析的基础上,建立了应力、应变、温度和热力学压力的关系方程式,给出了核废料贮库裂隙岩体介质热-液-力耦合的定解方程。为探讨核废料贮存裂隙岩体水热耦合迁移以及应力响应特征,提供了力学模型。
An important part of the safety analysis of Nuclear Waste storage is Mechanical response of the coupling of rock mass stability,tectonic stresses ,ground water flow through the repository and thermal loading. Coupled behavior of rock masses is ana- lyzed. On the aspect of mechanical behavior models of the fracture rock mass, mechanic function is described with the relationship between effective elastic moduli of the fracture mass and elastic moduli of the rock ,having been derived by O＇Connell. According to the implication of the crack-denslty parameter in the relationship ,we derive mathematical relationship between the crack-density and the fabric tensor introduced by Oda with temperature effect. For models of hydraulic behavior ,this paper makes a thorough study on aperture of rock joins, the number of open cracks after heating in rock mass, the fracture interconnectivity.tcctonic stresses, the dilation due to shear slidlng,and utilize fluid permeability tensor proposed by Oda. the tensor field of permeability in the fracture rock mass with coupled THM properties is derived. Based on theory analysls,thermal-hydro-mechanical coupling constitutive relationship and the definite equations in fractured rock mass are deduced.
出处
《地质灾害与环境保护》
2006年第1期54-57,共4页
Journal of Geological Hazards and Environment Preservation
基金
国家自然科学基金资助项目(40172098)
关键词
校废料贮库
热-液-力耦合模型
附加应力
热载
nuclear waste repositories
coupled thermal-hydro-mechanical model
tectonic stresses
thermal loading
