裂隙贯通率对双重孔隙介质热-水-应力耦合现象影响的有限元分析

为探讨裂隙的贯通率对于耦合的温度场、渗流场和应力场的作用，应用所建立的遍有节理岩体双重孔隙-裂隙介质热-水-应力耦合模型，以一个假定的位于非饱和地层中的高放废物地质处置库为算例，针对裂隙和孔隙的贯通率不同的4种工况进行了二维有限元数值分析，考察了围岩中的温度、负的孔隙和裂隙水压力、地下水流速、孔隙及裂隙的渗透系数修正因子和应力的变化、分布情况。结果显示，由于裂隙贯通率的差异使得双重介质的刚度不同，引起岩体中应力状态及水平的改变，从而影响到孔隙、裂隙的孔隙率及渗透系数的量值，并导致孔隙水和裂隙水的压力大小、分布以及水流速度的变化

Finite element analyses of effects of fracture continuity rate on thermo-hydro-mechanical coupling in dual-porosity medium

In order to probe into the effects of fracture continuity rate on coupled temperature field,seepage field and stress field,using the coupled thermo-hydro-mechanical model of dual-porosity medium for ubiquitous-joint rock mass established by the authors and taking a hypothetical nuclear waste repository located in an unsaturated stratum as a calculation example,the two-dimensional finite element analyses were carried out for four cases in which the continuity rates of fracture and pore are different;and the ...