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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。
In order to investigate the effect of the through rate of fractures on the coupled temperature field, seepage field and stress field, a coupled thermo-hydro-mechanical model of double porosity-fractured rock mass in ubiquitous jointed rock mass was established. In this paper, a two-dimensional finite element numerical analysis of four kinds of working conditions with different penetration rates of fissures and pores was carried out. The temperature, negative porosity and fissure pressure in surrounding rock were investigated. Groundwater flow rate, pore and fissure permeability coefficient correction factor and stress changes, distribution. The results show that the stiffness of the dual media is different due to the difference of fracture penetration rate, which leads to the change of stress state and level in the rock mass, which affects the porosity and fracture porosity and permeability coefficient, and leads to the formation of pore water and fissure water The pressure of the size, distribution and changes in water flow rate.