裂隙岩体精细结构描述及工程特性数值试验

 基于裂隙的空间形态及分布的统计特性，应用裂隙网络随机模拟技术，建立工程裂隙岩体的数字化岩体模型，并编制程序实现自动化建模。利用GeoCAAS程序进行裂隙岩体数值试验研究，发展了研究裂隙岩体的力学和水力学特性以及两者关系的方法。主要探讨裂隙岩体变形模量和渗透系数随裂隙迹长变化而演化的规律，并进一步分析变形模量和渗透系数之间的关系。

FINE STRUCTURE DESCRIPTION FOR FRACTURED ROCK MASS A NUMERICAL TESTS ON ITS ENGINEERING PROPERTIES

The randomicity of fractures¢ shape(fracture orientation，dip，trace length，width，and spacing) and distribution are considered，and Monte Carlo technique is adopted to develop a code RFNM. By RFNM，not only the virtual fractured rock mass，in which the structure information of fractures is described and the real engineering rock mass is represented，can be generated，but also the fractured rock mass model can be discretized and then combined with numerical methods to solve practical engineering problems. Therefore，the virtual fractured rock mass with random fracture networks is in fact one digital fractured rock mass model. In addition，FEM is adopted to develop the GeoCAAS(geo-engineering computer aided analysis system) code. The mechanical and hydraulic properties of fractured rock mass are studied by numerical tests. The results provide the evolutionary laws of deformation modulus and permeability with the increase of fracture trace length. Furthermore，the relationship between deformation modulus and permeability is discussed.