裂隙岩体渗流应力耦合研究现状与展望

裂隙岩体渗流应力耦合是岩石力学及工程领域研究的热点和难点问题。首先系统地阐述了裂隙岩体渗流应力耦合的试验、数学模型研究现状，归纳了常用数值分析方法及其应用情况，然后总结了研究热点和工程应用状况。通过对流固耦合研究现状分析，提出几点建议：（1）以往研究多集中在渗透性与法向应力之间的关系上，应多开展剪切应力和三维应力条件下裂隙岩体渗透性与应力之间的关系研究；（2）鉴于传统数值方法模拟裂隙扩展的困难，发展能考虑裂隙产生及扩展的新兴数值方法，如无网格法、数值流形元和混合有限元离散元分析方法等（3）考虑岩石特性、特殊环境下的多场耦合机理与应用研究，如非均质性、流变特性、高温低温、化学腐蚀等；（4）现有模型与实际情况虽有差距，但也应充分利用以使实际工程的设计与分析更加合理。

PRESENT SITUATION AND PROSPECT OF SEEPAGE STRESS COUPLING IN FRACTURED ROCK MASS

Seepage-stress coupling in fractured rock mass is a hot and difficult issue in the field of rock mechanics and engineering research. Firstly, the research status of the experiments and mathematical models of the coupling of fractured rock mass were described systematically. Meanwhile, some common numerical analysis methods and their applications were summed up. Then the hotspots and engineering applications of coupling were summarized. According to the analysis of the research status of seepage-stress coupling, some suggestions were put forward:(1)In most of past researches, the relationship between permeability and normal stress were focused, and the effects study of shear stress or three dimensional stress on permeability were less. So the latter should be carried out. (2)In view of the difficulty of simulating the expansion of fractures by traditional numerical methods, new numerical methods that can consider the generation and expansion of fissures, such as meshless method, numerical manifold method and coupling analysis of FEM/DEM,should be developed. (3)Considering the mechanism and application study of multifield coupling of fractured rock mass in special environment, such as high or low temperature, chemical corrosion, et al. And the characteristics of rock such as heterogeneity, rheological properties should also be taken into account. (4)Although there were disparity between the existing models and the actual situations, the theories should also be fully utilized to make the design and analysis of the project more reasonable.